Merge branch 'release/0.18.0'

.bettercodehub.yml

@@ -1,3 +1,3 @@
-component_depth: 8
+component_depth: 10
 languages:
 - kotlin

.travis.yml

@@ -14,7 +14,7 @@ cache:
 branches:
   only:
     - develop
-    - 0.17.4
+    - 0.18.0
 
 android:
  licenses:
@@ -48,20 +48,15 @@ before_script:
 script:
   - ./gradlew dependencies --stacktrace --daemon
   - fossa --no-ansi || true
-  #- ./gradlew lintPlayRelease -x fabricGenerateResourcesPlayRelease --stacktrace --daemon
-  - ./gradlew -Pcoverage testPlayDebugUnitTest -x fabricGenerateResourcesPlay --stacktrace --daemon
+  - ./gradlew -Pcoverage testPlayDebugUnitTest --stacktrace --daemon
   - ./gradlew -Pcoverage createFdroidDebugCoverageReport --stacktrace --daemon
   - ./gradlew -Pcoverage jacocoTestReport --stacktrace --daemon
-  - if [ -z ${SONAR_HOST+x} ]; then echo "sonar scan skipped"; else
-      git fetch --unshallow;
-      ./gradlew sonarqube -x test -x lint -x fabricGenerateResourcesPlayRelease -x fabricGenerateResourcesFdroidRelease -Dsonar.host.url=$SONAR_HOST -Dsonar.organization=$SONAR_ORG -Dsonar.login=$SONAR_KEY -Dsonar.branch.name=${TRAVIS_PULL_REQUEST_BRANCH:-$TRAVIS_BRANCH} --stacktrace --daemon;
-    fi
   - |
     if [ $TRAVIS_TAG ]; then
       gpg --yes --batch --passphrase=$SERVICES_ENCRYPT_KEY ./app/src/release/google-services.json.gpg;
       gpg --yes --batch --passphrase=$ENCRYPT_KEY ./app/key.p12.gpg;
       gpg --yes --batch --passphrase=$ENCRYPT_KEY ./app/upload-key.jks.gpg;
-      ./gradlew publishPlayRelease -PenableCrashlytics --stacktrace;
+      ./gradlew publishPlayRelease -PenableFirebase --stacktrace;
     fi
 
 after_success:

app/build.gradle

@@ -1,8 +1,7 @@
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-kapt'
-apply plugin: 'kotlin-android-extensions'
-apply plugin: 'io.fabric'
+apply plugin: 'com.google.firebase.crashlytics'
 apply plugin: 'com.github.triplet.play'
 apply plugin: 'com.mikepenz.aboutlibraries.plugin'
 apply from: 'jacoco.gradle'
@@ -18,14 +17,13 @@ android {
         testApplicationId "io.github.tests.wulkanowy"
         minSdkVersion 17
         targetSdkVersion 29
-        versionCode 57
-        versionName "0.17.4"
+        versionCode 59
+        versionName "0.18.0"
         multiDexEnabled true
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
         manifestPlaceholders = [
-                fabric_api_key     : System.getenv("FABRIC_API_KEY") ?: "null",
-                crashlytics_enabled: project.hasProperty("enableCrashlytics")
+                firebase_enabled: project.hasProperty("enableFirebase")
         ]
         javaCompileOptions {
             annotationProcessorOptions {
@@ -52,18 +50,16 @@ android {
 
     buildTypes {
         release {
-            buildConfigField "boolean", "CRASHLYTICS_ENABLED", "true"
             minifyEnabled true
             shrinkResources true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
             signingConfig signingConfigs.release
         }
         debug {
-            buildConfigField "boolean", "CRASHLYTICS_ENABLED", project.hasProperty("enableCrashlytics") ? "true" : "false"
             applicationIdSuffix ".dev"
             versionNameSuffix "-dev"
             testCoverageEnabled = project.hasProperty('coverage')
-            ext.enableCrashlytics = project.hasProperty("enableCrashlytics")
+            ext.enableCrashlytics = project.hasProperty("enableFirebase")
         }
     }
 
@@ -75,11 +71,14 @@ android {
         }
 
         fdroid {
-            buildConfigField "boolean", "CRASHLYTICS_ENABLED", "false"
             dimension "platform"
         }
     }
 
+    viewBinding {
+        enabled = true
+    }
+
     lintOptions {
         disable 'HardwareIds'
     }
@@ -103,10 +102,6 @@ android {
     }
 }
 
-androidExtensions {
-    experimental = true
-}
-
 play {
     serviceAccountEmail = System.getenv("PLAY_SERVICE_ACCOUNT_EMAIL") ?: "jan@fakelog.cf"
     serviceAccountCredentials = file('key.p12')
@@ -118,7 +113,6 @@ ext {
     work_manager = "2.3.4"
     room = "2.2.5"
     dagger = "2.27"
-    // don't update https://github.com/ChuckerTeam/chucker/issues/242
     chucker = "3.2.0"
     mockk = "1.9.2"
 }
@@ -128,12 +122,12 @@ configurations.all {
 }
 
 dependencies {
-    implementation "io.github.wulkanowy:sdk:0.17.4"
+    implementation "io.github.wulkanowy:sdk:0.18.0"
 
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "androidx.core:core-ktx:1.2.0"
     implementation "androidx.activity:activity-ktx:1.1.0"
-    implementation "androidx.appcompat:appcompat:1.2.0-beta01"
+    implementation "androidx.appcompat:appcompat:1.2.0-rc01"
     implementation "androidx.appcompat:appcompat-resources:1.1.0"
     implementation "androidx.fragment:fragment-ktx:1.2.4"
     implementation "androidx.annotation:annotation:1.1.0"
@@ -167,30 +161,29 @@ dependencies {
     implementation "com.squareup.inject:assisted-inject-annotations-dagger2:0.5.2"
     kapt "com.squareup.inject:assisted-inject-processor-dagger2:0.5.2"
 
-    implementation "eu.davidea:flexible-adapter:5.1.0"
-    implementation "eu.davidea:flexible-adapter-ui:1.0.0"
     implementation "com.aurelhubert:ahbottomnavigation:2.3.4"
     implementation "com.ncapdevi:frag-nav:3.3.0"
-    implementation "com.github.YarikSOffice:lingver:1.2.1"
+    implementation "com.github.YarikSOffice:lingver:1.2.2"
 
-    implementation "com.github.pwittchen:reactivenetwork-rx2:3.0.6"
+    implementation "com.github.pwittchen:reactivenetwork-rx2:3.0.8"
     implementation "io.reactivex.rxjava2:rxandroid:2.1.1"
     implementation "io.reactivex.rxjava2:rxjava:2.2.19"
 
     implementation "com.google.code.gson:gson:2.8.6"
-    implementation "com.jakewharton.threetenabp:threetenabp:1.2.3"
+    implementation "com.jakewharton.threetenabp:threetenabp:1.2.4"
     implementation "com.jakewharton.timber:timber:4.7.1"
     implementation "at.favre.lib:slf4j-timber:1.0.1"
     implementation "fr.bipi.treessence:treessence:0.3.2"
     implementation "com.mikepenz:aboutlibraries-core:$about_libraries"
     implementation 'com.wdullaer:materialdatetimepicker:4.2.3'
-    implementation "io.coil-kt:coil:0.9.5"
+    implementation "io.coil-kt:coil:0.11.0"
+    implementation "io.github.wulkanowy:AppKillerManager:3.0.0"
 
-    playImplementation 'com.google.firebase:firebase-analytics:17.3.0'
-    playImplementation 'com.google.firebase:firebase-inappmessaging-display-ktx:19.0.5'
-    playImplementation "com.google.firebase:firebase-inappmessaging-ktx:19.0.5"
-    playImplementation "com.google.firebase:firebase-messaging:20.1.0"
-    playImplementation "com.crashlytics.sdk.android:crashlytics:2.10.1"
+    playImplementation 'com.google.firebase:firebase-analytics:17.4.1'
+    playImplementation 'com.google.firebase:firebase-inappmessaging-display-ktx:19.0.6'
+    playImplementation "com.google.firebase:firebase-inappmessaging-ktx:19.0.6"
+    playImplementation 'com.google.firebase:firebase-messaging:20.1.7'
+    playImplementation 'com.google.firebase:firebase-crashlytics:17.0.0'
     playImplementation 'com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava'
 
     releaseImplementation "com.github.ChuckerTeam.Chucker:library-no-op:$chucker"
@@ -200,7 +193,7 @@ dependencies {
 
     testImplementation "junit:junit:4.13"
     testImplementation "io.mockk:mockk:$mockk"
-    testImplementation "org.threeten:threetenbp:1.4.3"
+    testImplementation "org.threeten:threetenbp:1.4.4"
     testImplementation "org.mockito:mockito-inline:3.3.3"
 
     androidTestImplementation "androidx.test:core:1.2.0"

app/src/androidTest/java/io/github/wulkanowy/data/repositories/grade/GradeLocalTest.kt

@@ -24,7 +24,7 @@ class GradeLocalTest {
     fun createDb() {
         testDb = Room.inMemoryDatabaseBuilder(ApplicationProvider.getApplicationContext(), AppDatabase::class.java)
             .build()
-        gradeLocal = GradeLocal(testDb.gradeDao)
+        gradeLocal = GradeLocal(testDb.gradeDao, testDb.gradeSummaryDao)
     }
 
     @After
@@ -43,7 +43,7 @@ class GradeLocalTest {
         val semester = Semester(1, 2, "", 2019, 2, 1, now(), now(), 1, 1)
 
         val grades = gradeLocal
-            .getGrades(semester)
+            .getGradesDetails(semester)
             .blockingGet()
 
         assertEquals(2, grades.size)

app/src/androidTest/java/io/github/wulkanowy/data/repositories/grade/GradeRepositoryTest.kt

@@ -11,6 +11,7 @@ import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.repositories.TestInternetObservingStrategy
 import io.github.wulkanowy.sdk.Sdk
+import io.github.wulkanowy.sdk.pojo.Grade
 import io.mockk.MockKAnnotations
 import io.mockk.every
 import io.mockk.impl.annotations.MockK
@@ -52,7 +53,7 @@ class GradeRepositoryTest {
     fun initApi() {
         MockKAnnotations.init(this)
         testDb = Room.inMemoryDatabaseBuilder(getApplicationContext(), AppDatabase::class.java).build()
-        gradeLocal = GradeLocal(testDb.gradeDao)
+        gradeLocal = GradeLocal(testDb.gradeDao, testDb.gradeSummaryDao)
         gradeRemote = GradeRemote(mockSdk)
 
         every { studentMock.registrationDate } returns LocalDateTime.of(2019, 2, 27, 12, 0)
@@ -75,10 +76,10 @@ class GradeRepositoryTest {
             createGradeApi(5, 4.0, of(2019, 2, 26), "przed zalogowanie w aplikacji"),
             createGradeApi(5, 4.0, of(2019, 2, 27), "Ocena z dnia logowania"),
             createGradeApi(5, 4.0, of(2019, 2, 28), "Ocena jeszcze nowsza")
-        ))
+        ) to emptyList())
 
         val grades = GradeRepository(settings, gradeLocal, gradeRemote)
-            .getGrades(studentMock, semesterMock, true).blockingGet().sortedByDescending { it.date }
+            .getGrades(studentMock, semesterMock, true).blockingGet().first.sortedByDescending { it.date }
 
         assertFalse { grades[0].isRead }
         assertFalse { grades[1].isRead }
@@ -99,10 +100,10 @@ class GradeRepositoryTest {
             createGradeApi(4, 3.0, of(2019, 2, 26), "starszą niż ostatnia lokalnie"),
             createGradeApi(3, 4.0, of(2019, 2, 27), "Ta jest z tego samego dnia co ostatnia lokalnie"),
             createGradeApi(2, 5.0, of(2019, 2, 28), "Ta jest już w ogóle nowa")
-        ))
+        ) to emptyList())
 
         val grades = GradeRepository(settings, gradeLocal, gradeRemote)
-            .getGrades(studentMock, semesterMock, true).blockingGet().sortedByDescending { it.date }
+            .getGrades(studentMock, semesterMock, true).blockingGet().first.sortedByDescending { it.date }
 
         assertFalse { grades[0].isRead }
         assertFalse { grades[1].isRead }
@@ -121,12 +122,12 @@ class GradeRepositoryTest {
         every { mockSdk.getGrades(1) } returns Single.just(listOf(
             createGradeApi(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
             createGradeApi(3, 5.0, of(2019, 2, 26), "Jakaś inna ocena")
-        ))
+        ) to emptyList())
 
         val grades = GradeRepository(settings, gradeLocal, gradeRemote)
             .getGrades(studentMock, semesterMock, true).blockingGet()
 
-        assertEquals(2, grades.size)
+        assertEquals(2, grades.first.size)
     }
 
     @Test
@@ -140,12 +141,12 @@ class GradeRepositoryTest {
             createGradeApi(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
             createGradeApi(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
             createGradeApi(3, 5.0, of(2019, 2, 26), "Jakaś inna ocena")
-        ))
+        ) to emptyList())
 
         val grades = GradeRepository(settings, gradeLocal, gradeRemote)
             .getGrades(studentMock, semesterMock, true).blockingGet()
 
-        assertEquals(3, grades.size)
+        assertEquals(3, grades.first.size)
     }
 
     @Test
@@ -156,12 +157,12 @@ class GradeRepositoryTest {
             createGradeApi(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
             createGradeApi(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
             createGradeApi(3, 5.0, of(2019, 2, 26), "Jakaś inna ocena")
-        ))
+        ) to emptyList())
 
         val grades = GradeRepository(settings, gradeLocal, gradeRemote)
             .getGrades(studentMock, semesterMock, true).blockingGet()
 
-        assertEquals(3, grades.size)
+        assertEquals(3, grades.first.size)
     }
 
     @Test
@@ -171,11 +172,11 @@ class GradeRepositoryTest {
             createGradeLocal(3, 5.0, of(2019, 2, 26), "Jakaś inna ocena")
         ))
 
-        every { mockSdk.getGrades(1) } returns Single.just(listOf())
+        every { mockSdk.getGrades(1) } returns Single.just(emptyList<Grade>() to emptyList())
 
         val grades = GradeRepository(settings, gradeLocal, gradeRemote)
             .getGrades(studentMock, semesterMock, true).blockingGet()
 
-        assertEquals(0, grades.size)
+        assertEquals(0, grades.first.size)
     }
 }

app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TimetableRepositoryTest.kt

@@ -8,12 +8,15 @@ import androidx.test.filters.SdkSuppress
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
 import io.github.wulkanowy.data.db.AppDatabase
 import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.repositories.TestInternetObservingStrategy
 import io.github.wulkanowy.data.repositories.getStudent
+import io.github.wulkanowy.services.alarm.TimetableNotificationSchedulerHelper
 import io.github.wulkanowy.sdk.Sdk
 import io.mockk.MockKAnnotations
 import io.mockk.every
 import io.mockk.impl.annotations.MockK
+import io.mockk.mockk
 import io.reactivex.Single
 import org.junit.After
 import org.junit.Before
@@ -34,11 +37,17 @@ class TimetableRepositoryTest {
         .strategy(TestInternetObservingStrategy())
         .build()
 
+    @MockK
+    private lateinit var studentMock: Student
+
     private val student = getStudent()
 
     @MockK
     private lateinit var semesterMock: Semester
 
+    @MockK
+    private lateinit var timetableNotificationSchedulerHelper: TimetableNotificationSchedulerHelper
+
     private lateinit var timetableRemote: TimetableRemote
 
     private lateinit var timetableLocal: TimetableLocal
@@ -52,10 +61,17 @@ class TimetableRepositoryTest {
         timetableLocal = TimetableLocal(testDb.timetableDao)
         timetableRemote = TimetableRemote(mockSdk)
 
+        every { timetableNotificationSchedulerHelper.scheduleNotifications(any(), any()) } returns mockk()
+        every { timetableNotificationSchedulerHelper.cancelScheduled(any(), any()) } returns mockk()
+
+        every { studentMock.studentId } returns 1
+        every { studentMock.studentName } returns "Jan Kowalski"
+
         every { semesterMock.studentId } returns 1
         every { semesterMock.diaryId } returns 2
         every { semesterMock.schoolYear } returns 2019
         every { semesterMock.semesterId } returns 1
+
         every { mockSdk.switchDiary(any(), any()) } returns mockSdk
     }
 
@@ -80,7 +96,7 @@ class TimetableRepositoryTest {
             createTimetableRemote(of(2019, 3, 5, 10, 30), 4, "", "W-F")
         ))
 
-        val lessons = TimetableRepository(settings, timetableLocal, timetableRemote)
+        val lessons = TimetableRepository(settings, timetableLocal, timetableRemote, timetableNotificationSchedulerHelper)
             .getTimetable(student, semesterMock, LocalDate.of(2019, 3, 5), LocalDate.of(2019, 3, 5), true)
             .blockingGet()
 
@@ -126,7 +142,7 @@ class TimetableRepositoryTest {
             createTimetableRemote(of(2019, 12, 25, 10, 40), 4, "126", "Matematyka", "Paweł Czwartkowski", true)
         ))
 
-        val lessons = TimetableRepository(settings, timetableLocal, timetableRemote)
+        val lessons = TimetableRepository(settings, timetableLocal, timetableRemote, timetableNotificationSchedulerHelper)
             .getTimetable(student, semesterMock, LocalDate.of(2019, 12, 23), LocalDate.of(2019, 12, 25), true)
             .blockingGet()
 

app/src/main/AndroidManifest.xml

@@ -18,7 +18,8 @@
         android:supportsRtl="false"
         android:theme="@style/WulkanowyTheme"
         android:usesCleartextTraffic="true"
-        tools:ignore="GoogleAppIndexingWarning,UnusedAttribute">
+        tools:ignore="GoogleAppIndexingWarning,UnusedAttribute"
+        tools:replace="android:supportsRtl,android:allowBackup">
         <activity
             android:name=".ui.modules.splash.SplashActivity"
             android:screenOrientation="portrait"
@@ -39,7 +40,8 @@
             android:name=".ui.modules.main.MainActivity"
             android:configChanges="orientation|screenSize"
             android:label="@string/main_title"
-            android:theme="@style/WulkanowyTheme.NoActionBar" />
+            android:theme="@style/WulkanowyTheme.NoActionBar"
+            android:windowSoftInputMode="adjustPan" />
         <activity
             android:name=".ui.modules.message.send.SendMessageActivity"
             android:configChanges="orientation|screenSize"
@@ -91,6 +93,8 @@
                 android:resource="@xml/provider_widget_lucky_number" />
         </receiver>
 
+        <receiver android:name=".services.alarm.TimetableNotificationReceiver" />
+
         <provider
             android:name="androidx.work.impl.WorkManagerInitializer"
             android:authorities="${applicationId}.workmanager-init"
@@ -107,12 +111,33 @@
                 android:resource="@xml/provider_paths" />
         </provider>
 
+        <!-- workaround for https://github.com/firebase/firebase-android-sdk/issues/473 enabled:false -->
+        <!-- https://firebase.googleblog.com/2017/03/take-control-of-your-firebase-init-on.html -->
+        <provider
+            android:name="com.google.firebase.provider.FirebaseInitProvider"
+            android:authorities="${applicationId}.firebaseinitprovider"
+            android:enabled="${firebase_enabled}"
+            android:exported="false" />
+
         <meta-data
-            android:name="io.fabric.ApiKey"
-            android:value="${fabric_api_key}" />
+            android:name="firebase_analytics_collection_enabled"
+            android:value="${firebase_enabled}" />
+
+        <meta-data
+            android:name="google_analytics_adid_collection_enabled"
+            android:value="${firebase_enabled}" />
+
         <meta-data
             android:name="firebase_crashlytics_collection_enabled"
-            android:value="${crashlytics_enabled}" />
+            android:value="${firebase_enabled}" />
+
+        <meta-data
+            android:name="firebase_messaging_auto_init_enabled"
+            android:value="${firebase_enabled}" />
+
+        <meta-data
+            android:name="firebase_inapp_messaging_auto_data_collection_enabled"
+            android:value="${firebase_enabled}" />
 
         <meta-data
             android:name="com.google.firebase.messaging.default_notification_icon"

app/src/main/java/io/github/wulkanowy/WulkanowyApp.kt

@@ -10,8 +10,6 @@ import com.jakewharton.threetenabp.AndroidThreeTen
 import com.yariksoffice.lingver.Lingver
 import dagger.android.AndroidInjector
 import dagger.android.support.DaggerApplication
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.utils.Log
 import fr.bipi.tressence.file.FileLoggerTree
 import io.github.wulkanowy.di.DaggerAppComponent
 import io.github.wulkanowy.services.sync.SyncWorkerFactory
@@ -21,7 +19,6 @@ import io.github.wulkanowy.utils.AppInfo
 import io.github.wulkanowy.utils.CrashlyticsExceptionTree
 import io.github.wulkanowy.utils.CrashlyticsTree
 import io.github.wulkanowy.utils.DebugLogTree
-import io.github.wulkanowy.utils.initCrashlytics
 import io.reactivex.exceptions.UndeliverableException
 import io.reactivex.plugins.RxJavaPlugins
 import timber.log.Timber
@@ -52,12 +49,10 @@ class WulkanowyApp : DaggerApplication(), Configuration.Provider {
         themeManager.applyDefaultTheme()
 
         initLogging()
-        initCrashlytics(this, appInfo)
     }
 
     private fun initLogging() {
         if (appInfo.isDebug) {
-            FlexibleAdapter.enableLogs(Log.Level.DEBUG)
             Timber.plant(DebugLogTree())
             Timber.plant(FileLoggerTree.Builder()
                 .withFileName("wulkanowy.%g.log")

app/src/main/java/io/github/wulkanowy/data/RepositoryModule.kt

@@ -1,9 +1,11 @@
 package io.github.wulkanowy.data
 
+import android.app.AlarmManager
 import android.content.Context
 import android.content.SharedPreferences
 import android.content.res.AssetManager
 import android.content.res.Resources
+import androidx.core.content.getSystemService
 import androidx.preference.PreferenceManager
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.strategy.WalledGardenInternetObservingStrategy

app/src/main/java/io/github/wulkanowy/data/pojos/AppCreator.kt

@@ -1,3 +0,0 @@
-package io.github.wulkanowy.data.pojos
-
-class AppCreator(val displayName: String, val githubUsername: String)

app/src/main/java/io/github/wulkanowy/data/pojos/Contributor.kt

@@ -0,0 +1,3 @@
+package io.github.wulkanowy.data.pojos
+
+class Contributor(val displayName: String, val githubUsername: String)

app/src/main/java/io/github/wulkanowy/data/repositories/appcreator/AppCreatorRepository.kt

@@ -2,18 +2,18 @@ package io.github.wulkanowy.data.repositories.appcreator
 
 import android.content.res.AssetManager
 import com.google.gson.Gson
-import io.github.wulkanowy.data.pojos.AppCreator
+import io.github.wulkanowy.data.pojos.Contributor
 import io.reactivex.Single
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
 class AppCreatorRepository @Inject constructor(private val assets: AssetManager) {
-    fun getAppCreators(): Single<List<AppCreator>> {
-        return Single.fromCallable<List<AppCreator>> {
+    fun getAppCreators(): Single<List<Contributor>> {
+        return Single.fromCallable<List<Contributor>> {
             Gson().fromJson(
                 assets.open("contributors.json").bufferedReader().use { it.readText() },
-                Array<AppCreator>::class.java
+                Array<Contributor>::class.java
             ).toList()
         }
     }

app/src/main/java/io/github/wulkanowy/data/repositories/grade/GradeLocal.kt

@@ -1,14 +1,19 @@
 package io.github.wulkanowy.data.repositories.grade
 
 import io.github.wulkanowy.data.db.dao.GradeDao
+import io.github.wulkanowy.data.db.dao.GradeSummaryDao
 import io.github.wulkanowy.data.db.entities.Grade
+import io.github.wulkanowy.data.db.entities.GradeSummary
 import io.github.wulkanowy.data.db.entities.Semester
 import io.reactivex.Maybe
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class GradeLocal @Inject constructor(private val gradeDb: GradeDao) {
+class GradeLocal @Inject constructor(
+    private val gradeDb: GradeDao,
+    private val gradeSummaryDb: GradeSummaryDao
+) {
 
     fun saveGrades(grades: List<Grade>) {
         gradeDb.insertAll(grades)
@@ -22,7 +27,19 @@ class GradeLocal @Inject constructor(private val gradeDb: GradeDao) {
         gradeDb.updateAll(grades)
     }
 
-    fun getGrades(semester: Semester): Maybe<List<Grade>> {
+    fun getGradesDetails(semester: Semester): Maybe<List<Grade>> {
         return gradeDb.loadAll(semester.semesterId, semester.studentId).filter { it.isNotEmpty() }
     }
+
+    fun saveGradesSummary(gradesSummary: List<GradeSummary>) {
+        gradeSummaryDb.insertAll(gradesSummary)
+    }
+
+    fun deleteGradesSummary(gradesSummary: List<GradeSummary>) {
+        gradeSummaryDb.deleteAll(gradesSummary)
+    }
+
+    fun getGradesSummary(semester: Semester): Maybe<List<GradeSummary>> {
+        return gradeSummaryDb.loadAll(semester.semesterId, semester.studentId).filter { it.isNotEmpty() }
+    }
 }

app/src/main/java/io/github/wulkanowy/data/repositories/grade/GradeRemote.kt

@@ -1,6 +1,7 @@
 package io.github.wulkanowy.data.repositories.grade
 
 import io.github.wulkanowy.data.db.entities.Grade
+import io.github.wulkanowy.data.db.entities.GradeSummary
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.sdk.Sdk
@@ -12,11 +13,11 @@ import javax.inject.Singleton
 @Singleton
 class GradeRemote @Inject constructor(private val sdk: Sdk) {
 
-    fun getGrades(student: Student, semester: Semester): Single<List<Grade>> {
+    fun getGrades(student: Student, semester: Semester): Single<Pair<List<Grade>, List<GradeSummary>>> {
         return sdk.init(student).switchDiary(semester.diaryId, semester.schoolYear)
             .getGrades(semester.semesterId)
-            .map { grades ->
-                grades.map {
+            .map { (details, summary) ->
+                details.map {
                     Grade(
                         studentId = semester.studentId,
                         semesterId = semester.semesterId,
@@ -33,6 +34,19 @@ class GradeRemote @Inject constructor(private val sdk: Sdk) {
                         date = it.date,
                         teacher = it.teacher
                     )
+                } to summary.map {
+                    GradeSummary(
+                        semesterId = semester.semesterId,
+                        studentId = semester.studentId,
+                        position = 0,
+                        subject = it.name,
+                        predictedGrade = it.predicted,
+                        finalGrade = it.final,
+                        pointsSum = it.pointsSum,
+                        proposedPoints = it.proposedPoints,
+                        finalPoints = it.finalPoints,
+                        average = it.average
+                    )
                 }
             }
     }

app/src/main/java/io/github/wulkanowy/data/repositories/grade/GradeRepository.kt

@@ -3,6 +3,7 @@ package io.github.wulkanowy.data.repositories.grade
 import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
 import io.github.wulkanowy.data.db.entities.Grade
+import io.github.wulkanowy.data.db.entities.GradeSummary
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.utils.uniqueSubtract
@@ -19,34 +20,47 @@ class GradeRepository @Inject constructor(
     private val remote: GradeRemote
 ) {
 
-    fun getGrades(student: Student, semester: Semester, forceRefresh: Boolean = false, notify: Boolean = false): Single<List<Grade>> {
-        return local.getGrades(semester).filter { !forceRefresh }
-            .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
-                .flatMap {
-                    if (it) remote.getGrades(student, semester)
-                    else Single.error(UnknownHostException())
-                }.flatMap { new ->
-                    local.getGrades(semester).toSingle(emptyList())
-                        .doOnSuccess { old ->
-                            val notifyBreakDate = old.maxBy { it.date }?.date ?: student.registrationDate.toLocalDate()
-                            local.deleteGrades(old.uniqueSubtract(new))
-                            local.saveGrades(new.uniqueSubtract(old)
-                                .onEach {
-                                    if (it.date >= notifyBreakDate) it.apply {
-                                        isRead = false
-                                        if (notify) isNotified = false
-                                    }
-                                })
-                        }
-                }.flatMap { local.getGrades(semester).toSingle(emptyList()) })
+    fun getGrades(student: Student, semester: Semester, forceRefresh: Boolean = false, notify: Boolean = false): Single<Pair<List<Grade>, List<GradeSummary>>> {
+        return local.getGradesDetails(semester).flatMap { details ->
+            local.getGradesSummary(semester).map { summary -> details to summary }
+        }.filter { !forceRefresh }
+            .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings).flatMap {
+                if (it) remote.getGrades(student, semester)
+                else Single.error(UnknownHostException())
+            }.flatMap { (newDetails, newSummary) ->
+                local.getGradesDetails(semester).toSingle(emptyList())
+                    .doOnSuccess { old ->
+                        val notifyBreakDate = old.maxBy { it.date }?.date ?: student.registrationDate.toLocalDate()
+                        local.deleteGrades(old.uniqueSubtract(newDetails))
+                        local.saveGrades(newDetails.uniqueSubtract(old)
+                            .onEach {
+                                if (it.date >= notifyBreakDate) it.apply {
+                                    isRead = false
+                                    if (notify) isNotified = false
+                                }
+                            })
+                    }.flatMap {
+                        local.getGradesSummary(semester).toSingle(emptyList())
+                            .doOnSuccess { old ->
+                                local.deleteGradesSummary(old.uniqueSubtract(newSummary))
+                                local.saveGradesSummary(newSummary.uniqueSubtract(old))
+                            }
+                    }
+            }.flatMap {
+                local.getGradesDetails(semester).toSingle(emptyList()).flatMap { details ->
+                    local.getGradesSummary(semester).toSingle(emptyList()).map { summary ->
+                        details to summary
+                    }
+                }
+            })
     }
 
     fun getUnreadGrades(semester: Semester): Single<List<Grade>> {
-        return local.getGrades(semester).map { it.filter { grade -> !grade.isRead } }.toSingle(emptyList())
+        return local.getGradesDetails(semester).map { it.filter { grade -> !grade.isRead } }.toSingle(emptyList())
     }
 
     fun getNotNotifiedGrades(semester: Semester): Single<List<Grade>> {
-        return local.getGrades(semester).map { it.filter { grade -> !grade.isNotified } }.toSingle(emptyList())
+        return local.getGradesDetails(semester).map { it.filter { grade -> !grade.isNotified } }.toSingle(emptyList())
     }
 
     fun updateGrade(grade: Grade): Completable {

app/src/main/java/io/github/wulkanowy/data/repositories/gradessummary/GradeSummaryLocal.kt

@@ -1,24 +0,0 @@
-package io.github.wulkanowy.data.repositories.gradessummary
-
-import io.github.wulkanowy.data.db.dao.GradeSummaryDao
-import io.github.wulkanowy.data.db.entities.GradeSummary
-import io.github.wulkanowy.data.db.entities.Semester
-import io.reactivex.Maybe
-import javax.inject.Inject
-import javax.inject.Singleton
-
-@Singleton
-class GradeSummaryLocal @Inject constructor(private val gradeSummaryDb: GradeSummaryDao) {
-
-    fun saveGradesSummary(gradesSummary: List<GradeSummary>) {
-        gradeSummaryDb.insertAll(gradesSummary)
-    }
-
-    fun deleteGradesSummary(gradesSummary: List<GradeSummary>) {
-        gradeSummaryDb.deleteAll(gradesSummary)
-    }
-
-    fun getGradesSummary(semester: Semester): Maybe<List<GradeSummary>> {
-        return gradeSummaryDb.loadAll(semester.semesterId, semester.studentId).filter { it.isNotEmpty() }
-    }
-}

app/src/main/java/io/github/wulkanowy/data/repositories/gradessummary/GradeSummaryRemote.kt

@@ -1,35 +0,0 @@
-package io.github.wulkanowy.data.repositories.gradessummary
-
-import io.github.wulkanowy.data.db.entities.GradeSummary
-import io.github.wulkanowy.data.db.entities.Semester
-import io.github.wulkanowy.data.db.entities.Student
-import io.github.wulkanowy.sdk.Sdk
-import io.github.wulkanowy.utils.init
-import io.reactivex.Single
-import javax.inject.Inject
-import javax.inject.Singleton
-
-@Singleton
-class GradeSummaryRemote @Inject constructor(private val sdk: Sdk) {
-
-    fun getGradeSummary(student: Student, semester: Semester): Single<List<GradeSummary>> {
-        return sdk.init(student).switchDiary(semester.diaryId, semester.schoolYear)
-            .getGradesSummary(semester.semesterId)
-            .map { gradesSummary ->
-                gradesSummary.map {
-                    GradeSummary(
-                        semesterId = semester.semesterId,
-                        studentId = semester.studentId,
-                        position = 0,
-                        subject = it.name,
-                        predictedGrade = it.predicted,
-                        finalGrade = it.final,
-                        pointsSum = it.pointsSum,
-                        proposedPoints = it.proposedPoints,
-                        finalPoints = it.finalPoints,
-                        average = it.average
-                    )
-                }
-            }
-    }
-}

app/src/main/java/io/github/wulkanowy/data/repositories/gradessummary/GradeSummaryRepository.kt

@@ -1,35 +0,0 @@
-package io.github.wulkanowy.data.repositories.gradessummary
-
-import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
-import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
-import io.github.wulkanowy.data.db.entities.GradeSummary
-import io.github.wulkanowy.data.db.entities.Semester
-import io.github.wulkanowy.data.db.entities.Student
-import io.github.wulkanowy.utils.uniqueSubtract
-import io.reactivex.Single
-import java.net.UnknownHostException
-import javax.inject.Inject
-import javax.inject.Singleton
-
-@Singleton
-class GradeSummaryRepository @Inject constructor(
-    private val settings: InternetObservingSettings,
-    private val local: GradeSummaryLocal,
-    private val remote: GradeSummaryRemote
-) {
-
-    fun getGradesSummary(student: Student, semester: Semester, forceRefresh: Boolean = false): Single<List<GradeSummary>> {
-        return local.getGradesSummary(semester).filter { !forceRefresh }
-            .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
-                .flatMap {
-                    if (it) remote.getGradeSummary(student, semester)
-                    else Single.error(UnknownHostException())
-                }.flatMap { new ->
-                    local.getGradesSummary(semester).toSingle(emptyList())
-                        .doOnSuccess { old ->
-                            local.deleteGradesSummary(old.uniqueSubtract(new))
-                            local.saveGradesSummary(new.uniqueSubtract(old))
-                        }
-                }.flatMap { local.getGradesSummary(semester).toSingle(emptyList()) })
-    }
-}

app/src/main/java/io/github/wulkanowy/data/repositories/preferences/PreferencesRepository.kt

@@ -26,6 +26,9 @@ class PreferencesRepository @Inject constructor(
     val isGradeExpandable: Boolean
         get() = !getBoolean(R.string.pref_key_expand_grade, R.bool.pref_default_expand_grade)
 
+    val showAllSubjectsOnStatisticsList: Boolean
+        get() = getBoolean(R.string.pref_key_grade_statistics_list, R.bool.pref_default_grade_statistics_list)
+
     val appThemeKey = context.getString(R.string.pref_key_app_theme)
     val appTheme: String
         get() = getString(appThemeKey, R.string.pref_default_app_theme)
@@ -52,6 +55,10 @@ class PreferencesRepository @Inject constructor(
     val isNotificationsEnable: Boolean
         get() = getBoolean(R.string.pref_key_notifications_enable, R.bool.pref_default_notifications_enable)
 
+    val isUpcomingLessonsNotificationsEnableKey = context.getString(R.string.pref_key_notifications_upcoming_lessons_enable)
+    val isUpcomingLessonsNotificationsEnable: Boolean
+        get() = getBoolean(isUpcomingLessonsNotificationsEnableKey, R.bool.pref_default_notification_upcoming_lessons_enable)
+
     val isDebugNotificationEnableKey = context.getString(R.string.pref_key_notification_debug)
     val isDebugNotificationEnable: Boolean
         get() = getBoolean(isDebugNotificationEnableKey, R.bool.pref_default_notification_debug)
@@ -68,6 +75,9 @@ class PreferencesRepository @Inject constructor(
     val showWholeClassPlan: String
         get() = getString(R.string.pref_key_timetable_show_whole_class, R.string.pref_default_timetable_show_whole_class)
 
+    val showTimetableTimers: Boolean
+        get() = getBoolean(R.string.pref_key_timetable_show_timers, R.bool.pref_default_timetable_show_timers)
+
     private fun getString(id: Int, default: Int) = getString(context.getString(id), default)
 
     private fun getString(id: String, default: Int) = sharedPref.getString(id, context.getString(default)) ?: context.getString(default)

app/src/main/java/io/github/wulkanowy/data/repositories/timetable/TimetableRepository.kt

@@ -5,6 +5,7 @@ import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.Inter
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.db.entities.Timetable
+import io.github.wulkanowy.services.alarm.TimetableNotificationSchedulerHelper
 import io.github.wulkanowy.utils.friday
 import io.github.wulkanowy.utils.monday
 import io.github.wulkanowy.utils.uniqueSubtract
@@ -18,7 +19,8 @@ import javax.inject.Singleton
 class TimetableRepository @Inject constructor(
     private val settings: InternetObservingSettings,
     private val local: TimetableLocal,
-    private val remote: TimetableRemote
+    private val remote: TimetableRemote,
+    private val schedulerHelper: TimetableNotificationSchedulerHelper
 ) {
 
     fun getTimetable(student: Student, semester: Semester, start: LocalDate, end: LocalDate, forceRefresh: Boolean = false): Single<List<Timetable>> {
@@ -31,8 +33,8 @@ class TimetableRepository @Inject constructor(
                     local.getTimetable(semester, monday, friday)
                         .toSingle(emptyList())
                         .doOnSuccess { old ->
-                            local.deleteTimetable(old.uniqueSubtract(new))
-                            local.saveTimetable(new.uniqueSubtract(old).map { item ->
+                            local.deleteTimetable(old.uniqueSubtract(new).also { schedulerHelper.cancelScheduled(it) })
+                            local.saveTimetable(new.uniqueSubtract(old).also { schedulerHelper.scheduleNotifications(it, student) }.map { item ->
                                 item.also { new ->
                                     old.singleOrNull { new.start == it.start }?.let { old ->
                                         return@map new.copy(
@@ -45,7 +47,7 @@ class TimetableRepository @Inject constructor(
                         }
                 }.flatMap {
                     local.getTimetable(semester, monday, friday).toSingle(emptyList())
-                }).map { list -> list.filter { it.date in start..end } }
+                }).map { list -> list.filter { it.date in start..end }.also { schedulerHelper.scheduleNotifications(it, student) } }
         }
     }
 }

app/src/main/java/io/github/wulkanowy/di/AppModule.kt

@@ -5,8 +5,6 @@ import android.content.Context
 import com.yariksoffice.lingver.Lingver
 import dagger.Module
 import dagger.Provides
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.WulkanowyApp
 import io.github.wulkanowy.utils.AppInfo
 import io.github.wulkanowy.utils.SchedulersProvider
@@ -23,9 +21,6 @@ internal class AppModule {
     @Provides
     fun provideSchedulersProvider() = SchedulersProvider()
 
-    @Provides
-    fun provideFlexibleAdapter() = FlexibleAdapter<AbstractFlexibleItem<*>>(null, null, true)
-
     @Singleton
     @Provides
     fun provideAppWidgetManager(context: Context): AppWidgetManager = AppWidgetManager.getInstance(context)

app/src/main/java/io/github/wulkanowy/di/BindingModule.kt

@@ -4,6 +4,7 @@ import dagger.Module
 import dagger.android.ContributesAndroidInjector
 import io.github.wulkanowy.di.scopes.PerActivity
 import io.github.wulkanowy.ui.base.ErrorDialog
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver
 import io.github.wulkanowy.ui.modules.login.LoginActivity
 import io.github.wulkanowy.ui.modules.login.LoginModule
 import io.github.wulkanowy.ui.modules.luckynumberwidget.LuckyNumberWidgetConfigureActivity
@@ -48,4 +49,7 @@ internal abstract class BindingModule {
 
     @ContributesAndroidInjector
     abstract fun bindLuckyNumberWidgetProvider(): LuckyNumberWidgetProvider
+
+    @ContributesAndroidInjector
+    abstract fun bindTimetableNotificationReceiver(): TimetableNotificationReceiver
 }

app/src/main/java/io/github/wulkanowy/services/ServicesModule.kt

@@ -1,7 +1,9 @@
 package io.github.wulkanowy.services
 
+import android.app.AlarmManager
 import android.content.Context
 import androidx.core.app.NotificationManagerCompat
+import androidx.core.content.getSystemService
 import androidx.work.WorkManager
 import com.squareup.inject.assisted.dagger2.AssistedModule
 import dagger.Binds
@@ -15,13 +17,13 @@ import io.github.wulkanowy.services.sync.channels.LuckyNumberChannel
 import io.github.wulkanowy.services.sync.channels.NewGradesChannel
 import io.github.wulkanowy.services.sync.channels.NewMessagesChannel
 import io.github.wulkanowy.services.sync.channels.NewNotesChannel
+import io.github.wulkanowy.services.sync.channels.UpcomingLessonsChannel
 import io.github.wulkanowy.services.sync.channels.PushChannel
 import io.github.wulkanowy.services.sync.works.AttendanceSummaryWork
 import io.github.wulkanowy.services.sync.works.AttendanceWork
 import io.github.wulkanowy.services.sync.works.CompletedLessonWork
 import io.github.wulkanowy.services.sync.works.ExamWork
 import io.github.wulkanowy.services.sync.works.GradeStatisticsWork
-import io.github.wulkanowy.services.sync.works.GradeSummaryWork
 import io.github.wulkanowy.services.sync.works.GradeWork
 import io.github.wulkanowy.services.sync.works.HomeworkWork
 import io.github.wulkanowy.services.sync.works.LuckyNumberWork
@@ -47,6 +49,10 @@ abstract class ServicesModule {
         @Singleton
         @Provides
         fun provideNotificationManager(context: Context) = NotificationManagerCompat.from(context)
+
+        @Singleton
+        @Provides
+        fun provideAlarmManager(context: Context): AlarmManager = context.getSystemService()!!
     }
 
     @ContributesAndroidInjector
@@ -64,10 +70,6 @@ abstract class ServicesModule {
     @IntoSet
     abstract fun provideAttendanceWork(work: AttendanceWork): Work
 
-    @Binds
-    @IntoSet
-    abstract fun provideGradeSummaryWork(work: GradeSummaryWork): Work
-
     @Binds
     @IntoSet
     abstract fun provideExamWork(work: ExamWork): Work
@@ -131,4 +133,8 @@ abstract class ServicesModule {
     @Binds
     @IntoSet
     abstract fun providePushChannel(channel: PushChannel): Channel
+
+    @Binds
+    @IntoSet
+    abstract fun provideUpcomingLessonsChannel(channel: UpcomingLessonsChannel): Channel
 }

app/src/main/java/io/github/wulkanowy/services/alarm/TimetableNotificationReceiver.kt

@@ -0,0 +1,117 @@
+package io.github.wulkanowy.services.alarm
+
+import android.annotation.SuppressLint
+import android.app.PendingIntent
+import android.app.PendingIntent.FLAG_UPDATE_CURRENT
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.os.Build
+import android.os.Build.VERSION_CODES.N
+import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
+import dagger.android.AndroidInjection
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.services.sync.channels.UpcomingLessonsChannel.Companion.CHANNEL_ID
+import io.github.wulkanowy.ui.modules.main.MainActivity
+import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.utils.SchedulersProvider
+import io.github.wulkanowy.utils.getCompatColor
+import io.github.wulkanowy.utils.toLocalDateTime
+import timber.log.Timber
+import javax.inject.Inject
+
+class TimetableNotificationReceiver : BroadcastReceiver() {
+
+    @Inject
+    lateinit var studentRepository: StudentRepository
+
+    @Inject
+    lateinit var schedulers: SchedulersProvider
+
+    companion object {
+        const val NOTIFICATION_TYPE_CURRENT = 1
+        const val NOTIFICATION_TYPE_UPCOMING = 2
+        const val NOTIFICATION_TYPE_LAST_LESSON_CANCELLATION = 3
+
+        const val NOTIFICATION_ID = "id"
+
+        const val STUDENT_NAME = "student_name"
+        const val STUDENT_ID = "student_id"
+        const val LESSON_TYPE = "type"
+        const val LESSON_TITLE = "title"
+        const val LESSON_ROOM = "room"
+        const val LESSON_NEXT_TITLE = "next_title"
+        const val LESSON_NEXT_ROOM = "next_room"
+        const val LESSON_START = "start_timestamp"
+        const val LESSON_END = "end_timestamp"
+    }
+
+    @SuppressLint("CheckResult")
+    override fun onReceive(context: Context, intent: Intent) {
+        Timber.d("Receiving intent... ${intent.toUri(0)}")
+        AndroidInjection.inject(this, context)
+
+        studentRepository.getCurrentStudent(false)
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .subscribe({
+                val studentId = intent.getIntExtra(STUDENT_ID, 0)
+                if (it.studentId == studentId) prepareNotification(context, intent)
+                else Timber.d("Notification studentId($studentId) differs from current(${it.studentId})")
+            }, { Timber.e(it) })
+    }
+
+    private fun prepareNotification(context: Context, intent: Intent) {
+        val type = intent.getIntExtra(LESSON_TYPE, 0)
+        val notificationId = intent.getIntExtra(NOTIFICATION_ID, MainView.Section.TIMETABLE.id)
+
+        if (type == NOTIFICATION_TYPE_LAST_LESSON_CANCELLATION) {
+            return NotificationManagerCompat.from(context).cancel(notificationId)
+        }
+
+        val studentId = intent.getIntExtra(STUDENT_ID, 0)
+        val studentName = intent.getStringExtra(STUDENT_NAME)
+
+        val subject = intent.getStringExtra(LESSON_TITLE)
+        val room = intent.getStringExtra(LESSON_ROOM)
+
+        val start = intent.getLongExtra(LESSON_START, 0)
+        val end = intent.getLongExtra(LESSON_END, 0)
+
+        val nextSubject = intent.getStringExtra(LESSON_NEXT_TITLE)
+        val nextRoom = intent.getStringExtra(LESSON_NEXT_ROOM)
+
+        Timber.d("TimetableNotification receive: type: $type, subject: $subject, start: ${start.toLocalDateTime()}, student: $studentId")
+
+        showNotification(context, notificationId, studentName,
+            if (type == NOTIFICATION_TYPE_CURRENT) end else start, end - start,
+            context.getString(if (type == NOTIFICATION_TYPE_CURRENT) R.string.timetable_now else R.string.timetable_next, "($room) $subject".removePrefix("()")),
+            nextSubject?.let { context.getString(R.string.timetable_later, "($nextRoom) $nextSubject".removePrefix("()")) }
+        )
+    }
+
+    private fun showNotification(context: Context, notificationId: Int, studentName: String?, countDown: Long, timeout: Long, title: String, next: String?) {
+        NotificationManagerCompat.from(context).notify(notificationId, NotificationCompat.Builder(context, CHANNEL_ID)
+            .setContentTitle(title)
+            .setContentText(next)
+            .setAutoCancel(false)
+            .setOngoing(true)
+            .setWhen(countDown)
+            .apply {
+                if (Build.VERSION.SDK_INT >= N) setUsesChronometer(true)
+            }
+            .setTimeoutAfter(timeout)
+            .setSmallIcon(R.drawable.ic_stat_timetable)
+            .setColor(context.getCompatColor(R.color.colorPrimary))
+            .setStyle(NotificationCompat.InboxStyle().also {
+                it.setSummaryText(studentName)
+                it.addLine(next)
+            })
+            .setContentIntent(PendingIntent.getActivity(context, MainView.Section.TIMETABLE.id,
+                MainActivity.getStartIntent(context, MainView.Section.TIMETABLE, true), FLAG_UPDATE_CURRENT))
+            .build()
+        )
+    }
+}

app/src/main/java/io/github/wulkanowy/services/alarm/TimetableNotificationSchedulerHelper.kt

@@ -0,0 +1,109 @@
+package io.github.wulkanowy.services.alarm
+
+import android.app.AlarmManager
+import android.app.AlarmManager.RTC_WAKEUP
+import android.app.PendingIntent
+import android.app.PendingIntent.FLAG_CANCEL_CURRENT
+import android.content.Context
+import android.content.Intent
+import androidx.core.app.AlarmManagerCompat
+import androidx.core.app.NotificationManagerCompat
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.data.db.entities.Timetable
+import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver.Companion.LESSON_END
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver.Companion.LESSON_NEXT_ROOM
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver.Companion.LESSON_NEXT_TITLE
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver.Companion.LESSON_ROOM
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver.Companion.LESSON_START
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver.Companion.LESSON_TITLE
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver.Companion.LESSON_TYPE
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver.Companion.NOTIFICATION_ID
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver.Companion.NOTIFICATION_TYPE_CURRENT
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver.Companion.NOTIFICATION_TYPE_LAST_LESSON_CANCELLATION
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver.Companion.NOTIFICATION_TYPE_UPCOMING
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver.Companion.STUDENT_ID
+import io.github.wulkanowy.services.alarm.TimetableNotificationReceiver.Companion.STUDENT_NAME
+import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.utils.toTimestamp
+import org.threeten.bp.LocalDateTime
+import org.threeten.bp.LocalDateTime.now
+import timber.log.Timber
+import javax.inject.Inject
+
+class TimetableNotificationSchedulerHelper @Inject constructor(
+    private val context: Context,
+    private val alarmManager: AlarmManager,
+    private val preferencesRepository: PreferencesRepository
+) {
+
+    private fun getRequestCode(time: LocalDateTime, studentId: Int) = (time.toTimestamp() * studentId).toInt()
+
+    private fun getUpcomingLessonTime(index: Int, day: List<Timetable>, lesson: Timetable): LocalDateTime {
+        return day.getOrNull(index - 1)?.end ?: lesson.start.minusMinutes(30)
+    }
+
+    fun cancelScheduled(lessons: List<Timetable>, studentId: Int = 1) {
+        lessons.sortedBy { it.start }.forEachIndexed { index, lesson ->
+            val upcomingTime = getUpcomingLessonTime(index, lessons, lesson)
+            cancelScheduledTo(upcomingTime..lesson.start, getRequestCode(upcomingTime, studentId))
+            cancelScheduledTo(lesson.start..lesson.end, getRequestCode(lesson.start, studentId))
+
+            Timber.d("TimetableNotification canceled: type 1 & 2, subject: ${lesson.subject}, start: ${lesson.start}, student: $studentId")
+        }
+    }
+
+    private fun cancelScheduledTo(range: ClosedRange<LocalDateTime>, requestCode: Int) {
+        if (now() in range) cancelNotification()
+        alarmManager.cancel(PendingIntent.getBroadcast(context, requestCode, Intent(), FLAG_CANCEL_CURRENT))
+    }
+
+    fun cancelNotification() = NotificationManagerCompat.from(context).cancel(MainView.Section.TIMETABLE.id)
+
+    fun scheduleNotifications(lessons: List<Timetable>, student: Student) {
+        if (!preferencesRepository.isUpcomingLessonsNotificationsEnable) return cancelScheduled(lessons, student.studentId)
+
+        lessons.groupBy { it.date }
+            .map { it.value.sortedBy { lesson -> lesson.start } }
+            .map { it.filter { lesson -> !lesson.canceled && lesson.isStudentPlan } }
+            .map { day ->
+                day.forEachIndexed { index, lesson ->
+                    val intent = createIntent(student, lesson, day.getOrNull(index + 1))
+
+                    if (lesson.start > now()) {
+                        scheduleBroadcast(intent, student.studentId, NOTIFICATION_TYPE_UPCOMING, getUpcomingLessonTime(index, day, lesson))
+                    }
+
+                    if (lesson.end > now()) {
+                        scheduleBroadcast(intent, student.studentId, NOTIFICATION_TYPE_CURRENT, lesson.start)
+                        if (day.lastIndex == index) {
+                            scheduleBroadcast(intent, student.studentId, NOTIFICATION_TYPE_LAST_LESSON_CANCELLATION, lesson.end)
+                        }
+                    }
+                }
+            }
+    }
+
+    private fun createIntent(student: Student, lesson: Timetable, nextLesson: Timetable?): Intent {
+        return Intent(context, TimetableNotificationReceiver::class.java).apply {
+            putExtra(STUDENT_ID, student.studentId)
+            putExtra(STUDENT_NAME, student.studentName)
+            putExtra(LESSON_ROOM, lesson.room)
+            putExtra(LESSON_START, lesson.start.toTimestamp())
+            putExtra(LESSON_END, lesson.end.toTimestamp())
+            putExtra(LESSON_TITLE, lesson.subject)
+            putExtra(LESSON_NEXT_TITLE, nextLesson?.subject)
+            putExtra(LESSON_NEXT_ROOM, nextLesson?.room)
+        }
+    }
+
+    private fun scheduleBroadcast(intent: Intent, studentId: Int, notificationType: Int, time: LocalDateTime) {
+        AlarmManagerCompat.setExactAndAllowWhileIdle(alarmManager, RTC_WAKEUP, time.toTimestamp(),
+            PendingIntent.getBroadcast(context, getRequestCode(time, studentId), intent.also {
+                it.putExtra(NOTIFICATION_ID, MainView.Section.TIMETABLE.id)
+                it.putExtra(LESSON_TYPE, notificationType)
+            }, FLAG_CANCEL_CURRENT)
+        )
+        Timber.d("TimetableNotification scheduled: type: $notificationType, subject: ${intent.getStringExtra(LESSON_TITLE)}, start: $time, student: $studentId")
+    }
+}

app/src/main/java/io/github/wulkanowy/services/sync/SyncManager.kt

@@ -42,7 +42,7 @@ class SyncManager @Inject constructor(
     init {
         if (now().isHolidays) stopSyncWorker()
 
-        if (SDK_INT > O) {
+        if (SDK_INT >= O) {
             channels.forEach { it.create() }
             notificationManager.deleteNotificationChannel("new_entries_channel")
         }

app/src/main/java/io/github/wulkanowy/services/sync/channels/UpcomingLessonsChannel.kt

@@ -0,0 +1,31 @@
+package io.github.wulkanowy.services.sync.channels
+
+import android.annotation.TargetApi
+import android.app.Notification.VISIBILITY_PUBLIC
+import android.app.NotificationChannel
+import android.app.NotificationManager.IMPORTANCE_DEFAULT
+import android.content.Context
+import androidx.core.app.NotificationManagerCompat
+import io.github.wulkanowy.R
+import javax.inject.Inject
+
+@TargetApi(26)
+class UpcomingLessonsChannel @Inject constructor(
+    private val notificationManager: NotificationManagerCompat,
+    private val context: Context
+) : Channel {
+
+    companion object {
+        const val CHANNEL_ID = "lesson_channel"
+    }
+
+    override fun create() {
+        notificationManager.createNotificationChannel(
+            NotificationChannel(CHANNEL_ID, context.getString(R.string.channel_upcoming_lessons), IMPORTANCE_DEFAULT).apply {
+                lockscreenVisibility = VISIBILITY_PUBLIC
+                setShowBadge(false)
+                enableVibration(false)
+            }
+        )
+    }
+}

app/src/main/java/io/github/wulkanowy/services/sync/works/GradeSummaryWork.kt

@@ -1,14 +0,0 @@
-package io.github.wulkanowy.services.sync.works
-
-import io.github.wulkanowy.data.db.entities.Semester
-import io.github.wulkanowy.data.db.entities.Student
-import io.github.wulkanowy.data.repositories.gradessummary.GradeSummaryRepository
-import io.reactivex.Completable
-import javax.inject.Inject
-
-class GradeSummaryWork @Inject constructor(private val gradeSummaryRepository: GradeSummaryRepository) : Work {
-
-    override fun create(student: Student, semester: Semester): Completable {
-        return gradeSummaryRepository.getGradesSummary(student, semester, true).ignoreElement()
-    }
-}

app/src/main/java/io/github/wulkanowy/services/sync/works/GradeWork.kt

@@ -58,4 +58,3 @@ class GradeWork @Inject constructor(
         )
     }
 }
-

app/src/main/java/io/github/wulkanowy/ui/base/BaseActivity.kt

@@ -11,6 +11,7 @@ import android.widget.Toast
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.app.AppCompatDelegate
+import androidx.viewbinding.ViewBinding
 import com.google.android.material.snackbar.Snackbar
 import com.google.android.material.snackbar.Snackbar.LENGTH_LONG
 import dagger.android.AndroidInjection
@@ -20,10 +21,13 @@ import io.github.wulkanowy.R
 import io.github.wulkanowy.ui.modules.login.LoginActivity
 import io.github.wulkanowy.utils.FragmentLifecycleLogger
 import io.github.wulkanowy.utils.getThemeAttrColor
+import io.github.wulkanowy.utils.lifecycleAwareVariable
 import javax.inject.Inject
 
-abstract class BaseActivity<T : BasePresenter<out BaseView>> : AppCompatActivity(), BaseView,
-    HasAndroidInjector {
+abstract class BaseActivity<T : BasePresenter<out BaseView>, VB : ViewBinding> :
+    AppCompatActivity(), BaseView, HasAndroidInjector {
+
+    protected var binding: VB by lifecycleAwareVariable()
 
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector<Any>

app/src/main/java/io/github/wulkanowy/ui/base/BaseDialogFragment.kt

@@ -1,9 +1,13 @@
 package io.github.wulkanowy.ui.base
 
 import android.widget.Toast
+import androidx.viewbinding.ViewBinding
 import dagger.android.support.DaggerAppCompatDialogFragment
+import io.github.wulkanowy.utils.lifecycleAwareVariable
 
-abstract class BaseDialogFragment : DaggerAppCompatDialogFragment(), BaseView {
+abstract class BaseDialogFragment<VB : ViewBinding> : DaggerAppCompatDialogFragment(), BaseView {
+
+    protected var binding: VB by lifecycleAwareVariable()
 
     override fun showError(text: String, error: Throwable) {
         showMessage(text)
@@ -14,11 +18,11 @@ abstract class BaseDialogFragment : DaggerAppCompatDialogFragment(), BaseView {
     }
 
     override fun showExpiredDialog() {
-        (activity as? BaseActivity<*>)?.showExpiredDialog()
+        (activity as? BaseActivity<*, *>)?.showExpiredDialog()
     }
 
     override fun openClearLoginView() {
-        (activity as? BaseActivity<*>)?.openClearLoginView()
+        (activity as? BaseActivity<*, *>)?.openClearLoginView()
     }
 
     override fun showErrorDetailsDialog(error: Throwable) {

app/src/main/java/io/github/wulkanowy/ui/base/BaseExpandableAdapter.kt

@@ -0,0 +1,58 @@
+package io.github.wulkanowy.ui.base
+
+import android.util.DisplayMetrics
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.LinearSmoothScroller
+import androidx.recyclerview.widget.RecyclerView
+import kotlin.math.max
+import kotlin.math.min
+
+abstract class BaseExpandableAdapter<T : RecyclerView.ViewHolder> : RecyclerView.Adapter<T>() {
+
+    companion object {
+        private const val MILLISECONDS_PER_INCH = 100f
+        private const val AUTO_SCROLL_DELAY = 150L
+    }
+
+    private var recyclerView: RecyclerView? = null
+
+    override fun onAttachedToRecyclerView(recyclerView: RecyclerView) {
+        super.onAttachedToRecyclerView(recyclerView)
+        this.recyclerView = recyclerView
+    }
+
+    override fun onDetachedFromRecyclerView(recyclerView: RecyclerView) {
+        super.onDetachedFromRecyclerView(recyclerView)
+        this.recyclerView = null
+    }
+
+    // original: https://github.com/davideas/FlexibleAdapter/blob/5.1.0/flexible-adapter/src/main/java/eu/davidea/flexibleadapter/FlexibleAdapter.java#L4984-L5011
+    protected fun scrollToHeaderWithSubItems(position: Int, subItemsCount: Int) {
+        val layoutManager = recyclerView!!.layoutManager as LinearLayoutManager
+        val firstVisibleItem = layoutManager.findFirstCompletelyVisibleItemPosition()
+        val lastVisibleItem = layoutManager.findLastCompletelyVisibleItemPosition()
+        val itemsToShow = position + subItemsCount - lastVisibleItem
+        if (itemsToShow > 0) {
+            val scrollMax: Int = position - firstVisibleItem
+            val scrollMin = max(0, position + subItemsCount - lastVisibleItem)
+            val scrollBy = min(scrollMax, scrollMin)
+            val scrollTo = firstVisibleItem + scrollBy
+            scrollToPosition(scrollTo)
+        } else if (position < firstVisibleItem) {
+            scrollToPosition(position)
+        }
+    }
+
+    private fun scrollToPosition(position: Int) {
+        recyclerView?.run {
+            postDelayed({
+                layoutManager?.startSmoothScroll(object : LinearSmoothScroller(context) {
+                    override fun getVerticalSnapPreference() = SNAP_TO_START
+                    override fun calculateSpeedPerPixel(displayMetrics: DisplayMetrics) = MILLISECONDS_PER_INCH / displayMetrics.densityDpi
+                }.apply {
+                    targetPosition = position
+                })
+            }, AUTO_SCROLL_DELAY)
+        }
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/base/BaseFragment.kt

@@ -1,12 +1,18 @@
 package io.github.wulkanowy.ui.base
 
 import android.view.View
+import androidx.annotation.LayoutRes
+import androidx.viewbinding.ViewBinding
 import com.google.android.material.snackbar.Snackbar
 import com.google.android.material.snackbar.Snackbar.LENGTH_LONG
 import dagger.android.support.DaggerFragment
 import io.github.wulkanowy.R
+import io.github.wulkanowy.utils.lifecycleAwareVariable
 
-abstract class BaseFragment : DaggerFragment(), BaseView {
+abstract class BaseFragment<VB : ViewBinding>(@LayoutRes layoutId: Int) : DaggerFragment(layoutId),
+    BaseView {
+
+    protected var binding: VB by lifecycleAwareVariable()
 
     protected var messageContainer: View? = null
 
@@ -16,7 +22,7 @@ abstract class BaseFragment : DaggerFragment(), BaseView {
                 .setAction(R.string.all_details) { if (isAdded) showErrorDetailsDialog(error) }
                 .show()
         } else {
-            (activity as? BaseActivity<*>)?.showError(text, error)
+            (activity as? BaseActivity<*, *>)?.showError(text, error)
         }
     }
 
@@ -28,15 +34,15 @@ abstract class BaseFragment : DaggerFragment(), BaseView {
         if (messageContainer != null) {
             Snackbar.make(messageContainer!!, text, LENGTH_LONG).show()
         } else {
-            (activity as? BaseActivity<*>)?.showMessage(text)
+            (activity as? BaseActivity<*, *>)?.showMessage(text)
         }
     }
 
     override fun showExpiredDialog() {
-        (activity as? BaseActivity<*>)?.showExpiredDialog()
+        (activity as? BaseActivity<*, *>)?.showExpiredDialog()
     }
 
     override fun openClearLoginView() {
-        (activity as? BaseActivity<*>)?.openClearLoginView()
+        (activity as? BaseActivity<*, *>)?.openClearLoginView()
     }
 }

app/src/main/java/io/github/wulkanowy/ui/base/ErrorDialog.kt

@@ -11,6 +11,7 @@ import android.widget.Toast
 import android.widget.Toast.LENGTH_LONG
 import androidx.core.content.getSystemService
 import io.github.wulkanowy.R
+import io.github.wulkanowy.databinding.DialogErrorBinding
 import io.github.wulkanowy.sdk.exception.FeatureDisabledException
 import io.github.wulkanowy.sdk.exception.FeatureNotAvailableException
 import io.github.wulkanowy.sdk.exception.ServiceUnavailableException
@@ -18,7 +19,6 @@ import io.github.wulkanowy.utils.AppInfo
 import io.github.wulkanowy.utils.getString
 import io.github.wulkanowy.utils.openEmailClient
 import io.github.wulkanowy.utils.openInternetBrowser
-import kotlinx.android.synthetic.main.dialog_error.*
 import java.io.InterruptedIOException
 import java.io.PrintWriter
 import java.io.StringWriter
@@ -26,7 +26,7 @@ import java.net.SocketTimeoutException
 import java.net.UnknownHostException
 import javax.inject.Inject
 
-class ErrorDialog : BaseDialogFragment() {
+class ErrorDialog : BaseDialogFragment<DialogErrorBinding>() {
 
     private lateinit var error: Throwable
 
@@ -52,7 +52,7 @@ class ErrorDialog : BaseDialogFragment() {
     }
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.dialog_error, container, false)
+        return DialogErrorBinding.inflate(inflater).apply { binding = this }.root
     }
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
@@ -62,27 +62,29 @@ class ErrorDialog : BaseDialogFragment() {
             error.printStackTrace(PrintWriter(this))
         }
 
-        errorDialogContent.text = stringWriter.toString()
-        with(errorDialogHorizontalScroll) {
-            post { fullScroll(HorizontalScrollView.FOCUS_LEFT) }
-        }
-        errorDialogCopy.setOnClickListener {
-            val clip = ClipData.newPlainText("wulkanowy", stringWriter.toString())
-            activity?.getSystemService<ClipboardManager>()?.setPrimaryClip(clip)
+        with(binding) {
+            errorDialogContent.text = stringWriter.toString()
+            with(errorDialogHorizontalScroll) {
+                post { fullScroll(HorizontalScrollView.FOCUS_LEFT) }
+            }
+            errorDialogCopy.setOnClickListener {
+                val clip = ClipData.newPlainText("wulkanowy", stringWriter.toString())
+                activity?.getSystemService<ClipboardManager>()?.setPrimaryClip(clip)
 
-            Toast.makeText(context, R.string.all_copied, LENGTH_LONG).show()
-        }
-        errorDialogCancel.setOnClickListener { dismiss() }
-        errorDialogReport.setOnClickListener { openEmailClient(stringWriter.toString()) }
-        errorDialogMessage.text = resources.getString(error)
-        errorDialogReport.isEnabled = when (error) {
-            is UnknownHostException,
-            is InterruptedIOException,
-            is SocketTimeoutException,
-            is ServiceUnavailableException,
-            is FeatureDisabledException,
-            is FeatureNotAvailableException -> false
-            else -> true
+                Toast.makeText(context, R.string.all_copied, LENGTH_LONG).show()
+            }
+            errorDialogCancel.setOnClickListener { dismiss() }
+            errorDialogReport.setOnClickListener { openEmailClient(stringWriter.toString()) }
+            errorDialogMessage.text = resources.getString(error)
+            errorDialogReport.isEnabled = when (error) {
+                is UnknownHostException,
+                is InterruptedIOException,
+                is SocketTimeoutException,
+                is ServiceUnavailableException,
+                is FeatureDisabledException,
+                is FeatureNotAvailableException -> false
+                else -> true
+            }
         }
     }
 

app/src/main/java/io/github/wulkanowy/ui/base/WidgetConfigureAdapter.kt

@@ -0,0 +1,46 @@
+package io.github.wulkanowy.ui.base
+
+import android.annotation.SuppressLint
+import android.graphics.PorterDuff
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.databinding.ItemAccountBinding
+import io.github.wulkanowy.utils.getThemeAttrColor
+import javax.inject.Inject
+
+class WidgetConfigureAdapter @Inject constructor() : RecyclerView.Adapter<WidgetConfigureAdapter.ItemViewHolder>() {
+
+    var items = emptyList<Pair<Student, Boolean>>()
+
+    var onClickListener: (Student) -> Unit = {}
+
+    override fun getItemCount() = items.size
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = ItemViewHolder(
+        ItemAccountBinding.inflate(LayoutInflater.from(parent.context), parent, false)
+    )
+
+    @SuppressLint("SetTextI18n")
+    override fun onBindViewHolder(holder: ItemViewHolder, position: Int) {
+        val (student, isCurrent) = items[position]
+
+        with(holder.binding) {
+            accountItemName.text = "${student.studentName} ${student.className}"
+            accountItemSchool.text = student.schoolName
+
+            with(accountItemImage) {
+                val colorImage = if (isCurrent) context.getThemeAttrColor(R.attr.colorPrimary)
+                else context.getThemeAttrColor(R.attr.colorOnSurface, 153)
+
+                setColorFilter(colorImage, PorterDuff.Mode.SRC_IN)
+            }
+
+            root.setOnClickListener { onClickListener(student) }
+        }
+    }
+
+    class ItemViewHolder(val binding: ItemAccountBinding) : RecyclerView.ViewHolder(binding.root)
+}

app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutAdapter.kt

@@ -0,0 +1,72 @@
+package io.github.wulkanowy.ui.modules.about
+
+import android.graphics.drawable.Drawable
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.core.content.res.ResourcesCompat
+import androidx.recyclerview.widget.RecyclerView
+import io.github.wulkanowy.databinding.ItemAboutBinding
+import io.github.wulkanowy.databinding.ScrollableHeaderAboutBinding
+import javax.inject.Inject
+
+class AboutAdapter @Inject constructor() : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
+
+    private enum class ViewType(val id: Int) {
+        ITEM_HEADER(1),
+        ITEM_ELEMENT(2)
+    }
+
+    var items = emptyList<Triple<String, String, Drawable?>>()
+
+    var onClickListener: (name: String) -> Unit = {}
+
+    override fun getItemCount() = items.size + 1
+
+    override fun getItemViewType(position: Int) = when (position) {
+        0 -> ViewType.ITEM_HEADER.id
+        else -> ViewType.ITEM_ELEMENT.id
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
+        val inflater = LayoutInflater.from(parent.context)
+
+        return when (viewType) {
+            ViewType.ITEM_HEADER.id -> HeaderViewHolder(ScrollableHeaderAboutBinding.inflate(inflater, parent, false))
+            ViewType.ITEM_ELEMENT.id -> ItemViewHolder(ItemAboutBinding.inflate(inflater, parent, false))
+            else -> throw IllegalStateException()
+        }
+    }
+
+    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
+        when (holder) {
+            is HeaderViewHolder -> bindHeaderViewHolder(holder.binding)
+            is ItemViewHolder -> bindItemViewHolder(holder.binding, position - 1)
+        }
+    }
+
+    private fun bindHeaderViewHolder(binding: ScrollableHeaderAboutBinding) {
+        with(binding.aboutScrollableHeaderIcon) {
+            setImageDrawable(ResourcesCompat.getDrawableForDensity(
+                context.resources, context.applicationInfo.icon, 640, null)
+            )
+        }
+    }
+
+    private fun bindItemViewHolder(binding: ItemAboutBinding, position: Int) {
+        val (title, summary, image) = items[position]
+
+        with(binding) {
+            aboutItemImage.setImageDrawable(image)
+            aboutItemTitle.text = title
+            aboutItemSummary.text = summary
+
+            root.setOnClickListener { onClickListener(title) }
+        }
+    }
+
+    private class HeaderViewHolder(val binding: ScrollableHeaderAboutBinding) :
+        RecyclerView.ViewHolder(binding.root)
+
+    private class ItemViewHolder(val binding: ItemAboutBinding) :
+        RecyclerView.ViewHolder(binding.root)
+}

app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutFragment.kt

@@ -2,13 +2,10 @@ package io.github.wulkanowy.ui.modules.about
 
 import android.graphics.drawable.Drawable
 import android.os.Bundle
-import android.view.LayoutInflater
 import android.view.View
-import android.view.ViewGroup
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import androidx.recyclerview.widget.LinearLayoutManager
 import io.github.wulkanowy.R
+import io.github.wulkanowy.databinding.FragmentAboutBinding
 import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.about.contributor.ContributorFragment
 import io.github.wulkanowy.ui.modules.about.license.LicenseFragment
@@ -19,17 +16,16 @@ import io.github.wulkanowy.utils.AppInfo
 import io.github.wulkanowy.utils.getCompatDrawable
 import io.github.wulkanowy.utils.openEmailClient
 import io.github.wulkanowy.utils.openInternetBrowser
-import io.github.wulkanowy.utils.setOnItemClickListener
-import kotlinx.android.synthetic.main.fragment_about.*
 import javax.inject.Inject
 
-class AboutFragment : BaseFragment(), AboutView, MainView.TitledView {
+class AboutFragment : BaseFragment<FragmentAboutBinding>(R.layout.fragment_about), AboutView,
+    MainView.TitledView {
 
     @Inject
     lateinit var presenter: AboutPresenter
 
     @Inject
-    lateinit var aboutAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+    lateinit var aboutAdapter: AboutAdapter
 
     @Inject
     lateinit var appInfo: AppInfo
@@ -80,29 +76,25 @@ class AboutFragment : BaseFragment(), AboutView, MainView.TitledView {
         fun newInstance() = AboutFragment()
     }
 
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.fragment_about, container, false)
-    }
-
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
+        binding = FragmentAboutBinding.bind(view)
         presenter.onAttachView(this)
     }
 
     override fun initView() {
-        aboutAdapter.setOnItemClickListener(presenter::onItemSelected)
+        aboutAdapter.onClickListener = presenter::onItemSelected
 
-        with(aboutRecycler) {
-            layoutManager = SmoothScrollLinearLayoutManager(context)
+        with(binding.aboutRecycler) {
+            layoutManager = LinearLayoutManager(context)
             adapter = aboutAdapter
         }
     }
 
-    override fun updateData(header: AboutScrollableHeader, items: List<AboutItem>) {
+    override fun updateData(data: List<Triple<String, String, Drawable?>>) {
         with(aboutAdapter) {
-            removeAllScrollableHeaders()
-            addScrollableHeader(header)
-            updateDataSet(items)
+            items = data
+            notifyDataSetChanged()
         }
     }
 

app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutItem.kt

@@ -1,56 +0,0 @@
-package io.github.wulkanowy.ui.modules.about
-
-import android.graphics.drawable.Drawable
-import android.view.View
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.FlexibleViewHolder
-import io.github.wulkanowy.R
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.item_about.*
-
-class AboutItem(
-    val title: String,
-    private val summary: String,
-    private val image: Drawable?
-) : AbstractFlexibleItem<AboutItem.ViewHolder>() {
-
-    override fun getLayoutRes() = R.layout.item_about
-
-    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) = ViewHolder(view, adapter)
-
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>) {
-        with(holder) {
-            aboutItemImage.setImageDrawable(image)
-            aboutItemTitle.text = title
-            aboutItemSummary.text = summary
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as AboutItem
-
-        if (title != other.title) return false
-        if (summary != other.summary) return false
-        if (image != other.image) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        var result = title.hashCode()
-        result = 31 * result + summary.hashCode()
-        result = 31 * result + (image?.hashCode() ?: 0)
-        return result
-    }
-
-    class ViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) : FlexibleViewHolder(view, adapter),
-        LayoutContainer {
-
-        override val containerView: View? get() = contentView
-    }
-}

app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutPresenter.kt

@@ -1,6 +1,5 @@
 package io.github.wulkanowy.ui.modules.about
 
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
@@ -23,10 +22,9 @@ class AboutPresenter @Inject constructor(
         loadData()
     }
 
-    fun onItemSelected(item: AbstractFlexibleItem<*>) {
-        if (item !is AboutItem) return
+    fun onItemSelected(name: String) {
         view?.run {
-            when (item.title) {
+            when (name) {
                 versionRes?.first -> {
                     Timber.i("Opening log viewer")
                     openLogViewer()
@@ -73,15 +71,16 @@ class AboutPresenter @Inject constructor(
 
     private fun loadData() {
         view?.run {
-            updateData(AboutScrollableHeader(), listOfNotNull(
-                versionRes?.let { (title, summary, image) -> AboutItem(title, summary, image) },
-                creatorsRes?.let { (title, summary, image) -> AboutItem(title, summary, image) },
-                feedbackRes?.let { (title, summary, image) -> AboutItem(title, summary, image) },
-                faqRes?.let { (title, summary, image) -> AboutItem(title, summary, image) },
-                discordRes?.let { (title, summary, image) -> AboutItem(title, summary, image) },
-                homepageRes?.let { (title, summary, image) -> AboutItem(title, summary, image) },
-                licensesRes?.let { (title, summary, image) -> AboutItem(title, summary, image) },
-                privacyRes?.let { (title, summary, image) -> AboutItem(title, summary, image) }))
+            updateData(listOfNotNull(
+                versionRes,
+                creatorsRes,
+                feedbackRes,
+                faqRes,
+                discordRes,
+                homepageRes,
+                licensesRes,
+                privacyRes
+            ))
         }
     }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutScrollableHeader.kt

@@ -1,41 +0,0 @@
-package io.github.wulkanowy.ui.modules.about
-
-import android.view.View
-import androidx.core.content.res.ResourcesCompat
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.FlexibleViewHolder
-import io.github.wulkanowy.R
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.scrollable_header_about.*
-
-class AboutScrollableHeader : AbstractFlexibleItem<AboutScrollableHeader.ViewHolder>() {
-
-    override fun getLayoutRes() = R.layout.scrollable_header_about
-
-    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) = ViewHolder(view, adapter)
-
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>) {
-        with(holder) {
-            val context = contentView.context
-            val drawable = ResourcesCompat.getDrawableForDensity(context.resources, context.applicationInfo.icon, 640, null)
-
-            aboutScrollableHeaderIcon.setImageDrawable(drawable)
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-        return true
-    }
-
-    override fun hashCode() = javaClass.hashCode()
-
-    class ViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) : FlexibleViewHolder(view, adapter),
-        LayoutContainer {
-
-        override val containerView: View? get() = contentView
-    }
-}

app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutView.kt

@@ -23,7 +23,7 @@ interface AboutView : BaseView {
 
     fun initView()
 
-    fun updateData(header: AboutScrollableHeader, items: List<AboutItem>)
+    fun updateData(data: List<Triple<String, String, Drawable?>>)
 
     fun openLogViewer()
 

app/src/main/java/io/github/wulkanowy/ui/modules/about/contributor/ContributorAdapter.kt

@@ -0,0 +1,41 @@
+package io.github.wulkanowy.ui.modules.about.contributor
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import coil.api.load
+import coil.transform.RoundedCornersTransformation
+import io.github.wulkanowy.data.pojos.Contributor
+import io.github.wulkanowy.databinding.ItemContributorBinding
+import javax.inject.Inject
+
+class ContributorAdapter @Inject constructor() :
+    RecyclerView.Adapter<ContributorAdapter.ItemViewHolder>() {
+
+    var items = emptyList<Contributor>()
+
+    var onClickListener: (Contributor) -> Unit = {}
+
+    override fun getItemCount() = items.size
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = ItemViewHolder(
+        ItemContributorBinding.inflate(LayoutInflater.from(parent.context), parent, false)
+    )
+
+    override fun onBindViewHolder(holder: ItemViewHolder, position: Int) {
+        val item = items[position]
+
+        with(holder.binding) {
+            creatorItemName.text = item.displayName
+            creatorItemAvatar.load("https://github.com/${item.githubUsername}.png") {
+                transformations(RoundedCornersTransformation(8f))
+                crossfade(true)
+            }
+
+            root.setOnClickListener { onClickListener(item) }
+        }
+    }
+
+    class ItemViewHolder(val binding: ItemContributorBinding) :
+        RecyclerView.ViewHolder(binding.root)
+}

app/src/main/java/io/github/wulkanowy/ui/modules/about/contributor/ContributorFragment.kt

@@ -1,30 +1,27 @@
 package io.github.wulkanowy.ui.modules.about.contributor
 
 import android.os.Bundle
-import android.view.LayoutInflater
 import android.view.View
 import android.view.View.GONE
 import android.view.View.VISIBLE
-import android.view.ViewGroup
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.common.FlexibleItemDecoration
-import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import androidx.recyclerview.widget.LinearLayoutManager
 import io.github.wulkanowy.R
+import io.github.wulkanowy.data.pojos.Contributor
+import io.github.wulkanowy.databinding.FragmentContributorBinding
 import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.ui.widgets.DividerItemDecoration
 import io.github.wulkanowy.utils.openInternetBrowser
-import io.github.wulkanowy.utils.setOnItemClickListener
-import kotlinx.android.synthetic.main.fragment_creator.*
 import javax.inject.Inject
 
-class ContributorFragment : BaseFragment(), ContributorView, MainView.TitledView {
+class ContributorFragment : BaseFragment<FragmentContributorBinding>(R.layout.fragment_contributor),
+    ContributorView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: ContributorPresenter
 
     @Inject
-    lateinit var creatorsAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+    lateinit var creatorsAdapter: ContributorAdapter
 
     override val titleStringId get() = R.string.contributors_title
 
@@ -32,29 +29,27 @@ class ContributorFragment : BaseFragment(), ContributorView, MainView.TitledView
         fun newInstance() = ContributorFragment()
     }
 
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.fragment_creator, container, false)
-    }
-
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding = FragmentContributorBinding.bind(view)
         presenter.onAttachView(this)
     }
 
     override fun initView() {
-        with(creatorRecycler) {
-            layoutManager = SmoothScrollLinearLayoutManager(context)
+        with(binding.creatorRecycler) {
+            layoutManager = LinearLayoutManager(context)
             adapter = creatorsAdapter
-            addItemDecoration(FlexibleItemDecoration(context)
-                .withDefaultDivider()
-                .withDrawDividerOnLastItem(false))
+            addItemDecoration(DividerItemDecoration(context))
         }
-        creatorsAdapter.setOnItemClickListener(presenter::onItemSelected)
-        creatorSeeMore.setOnClickListener { presenter.onSeeMoreClick() }
+        creatorsAdapter.onClickListener = presenter::onItemSelected
+        binding.creatorSeeMore.setOnClickListener { presenter.onSeeMoreClick() }
     }
 
-    override fun updateData(data: List<ContributorItem>) {
-        creatorsAdapter.updateDataSet(data)
+    override fun updateData(data: List<Contributor>) {
+        with(creatorsAdapter) {
+            items = data
+            notifyDataSetChanged()
+        }
     }
 
     override fun openUserGithubPage(username: String) {
@@ -66,7 +61,7 @@ class ContributorFragment : BaseFragment(), ContributorView, MainView.TitledView
     }
 
     override fun showProgress(show: Boolean) {
-        creatorProgress.visibility = if (show) VISIBLE else GONE
+        binding.creatorProgress.visibility = if (show) VISIBLE else GONE
     }
 
     override fun onDestroyView() {

app/src/main/java/io/github/wulkanowy/ui/modules/about/contributor/ContributorItem.kt

@@ -1,51 +0,0 @@
-package io.github.wulkanowy.ui.modules.about.contributor
-
-import android.view.View
-import coil.api.load
-import coil.transform.RoundedCornersTransformation
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.FlexibleViewHolder
-import io.github.wulkanowy.R
-import io.github.wulkanowy.data.pojos.AppCreator
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.item_contributor.*
-
-class ContributorItem(val creator: AppCreator) :
-    AbstractFlexibleItem<ContributorItem.ViewHolder>() {
-
-    override fun getLayoutRes() = R.layout.item_contributor
-
-    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) = ViewHolder(view, adapter)
-
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>) {
-        with(holder) {
-            creatorItemName.text = creator.displayName
-
-            creatorItemAvatar.load("https://github.com/${creator.githubUsername}.png") {
-                transformations(RoundedCornersTransformation(8f))
-                crossfade(true)
-            }
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as ContributorItem
-
-        if (creator != other.creator) return false
-
-        return true
-    }
-
-    override fun hashCode() = creator.hashCode()
-
-    class ViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) : FlexibleViewHolder(view, adapter),
-        LayoutContainer {
-
-        override val containerView: View? get() = contentView
-    }
-}

app/src/main/java/io/github/wulkanowy/ui/modules/about/contributor/ContributorPresenter.kt

@@ -1,6 +1,6 @@
 package io.github.wulkanowy.ui.modules.about.contributor
 
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.data.pojos.Contributor
 import io.github.wulkanowy.data.repositories.appcreator.AppCreatorRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
@@ -21,9 +21,8 @@ class ContributorPresenter @Inject constructor(
         loadData()
     }
 
-    fun onItemSelected(item: AbstractFlexibleItem<*>) {
-        if (item !is ContributorItem) return
-        view?.openUserGithubPage(item.creator.githubUsername)
+    fun onItemSelected(contributor: Contributor) {
+        view?.openUserGithubPage(contributor.githubUsername)
     }
 
     fun onSeeMoreClick() {
@@ -32,7 +31,6 @@ class ContributorPresenter @Inject constructor(
 
     private fun loadData() {
         disposable.add(appCreatorRepository.getAppCreators()
-            .map { it.map { creator -> ContributorItem(creator) } }
             .subscribeOn(schedulers.backgroundThread)
             .observeOn(schedulers.mainThread)
             .doFinally { view?.showProgress(false) }

app/src/main/java/io/github/wulkanowy/ui/modules/about/contributor/ContributorView.kt

@@ -1,12 +1,13 @@
 package io.github.wulkanowy.ui.modules.about.contributor
 
+import io.github.wulkanowy.data.pojos.Contributor
 import io.github.wulkanowy.ui.base.BaseView
 
 interface ContributorView : BaseView {
 
     fun initView()
 
-    fun updateData(data: List<ContributorItem>)
+    fun updateData(data: List<Contributor>)
 
     fun openUserGithubPage(username: String)
 

app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseAdapter.kt

@@ -0,0 +1,34 @@
+package io.github.wulkanowy.ui.modules.about.license
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import com.mikepenz.aboutlibraries.entity.Library
+import io.github.wulkanowy.databinding.ItemLicenseBinding
+import javax.inject.Inject
+
+class LicenseAdapter @Inject constructor() : RecyclerView.Adapter<LicenseAdapter.ItemViewHolder>() {
+
+    var items = emptyList<Library>()
+
+    var onClickListener: (Library) -> Unit = {}
+
+    override fun getItemCount() = items.size
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = ItemViewHolder(
+        ItemLicenseBinding.inflate(LayoutInflater.from(parent.context), parent, false)
+    )
+
+    override fun onBindViewHolder(holder: ItemViewHolder, position: Int) {
+        val item = items[position]
+
+        with(holder.binding) {
+            licenseItemName.text = item.libraryName
+            licenseItemSummary.text = item.license?.licenseName?.takeIf { it.isNotBlank() } ?: item.libraryVersion
+
+            root.setOnClickListener { onClickListener(item) }
+        }
+    }
+
+    class ItemViewHolder(val binding: ItemLicenseBinding) : RecyclerView.ViewHolder(binding.root)
+}

app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseFragment.kt

@@ -1,33 +1,29 @@
 package io.github.wulkanowy.ui.modules.about.license
 
 import android.os.Bundle
-import android.view.LayoutInflater
 import android.view.View
 import android.view.View.GONE
 import android.view.View.VISIBLE
-import android.view.ViewGroup
 import androidx.appcompat.app.AlertDialog
 import androidx.core.text.parseAsHtml
+import androidx.recyclerview.widget.LinearLayoutManager
 import com.mikepenz.aboutlibraries.Libs
 import com.mikepenz.aboutlibraries.entity.Library
 import dagger.Lazy
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
+import io.github.wulkanowy.databinding.FragmentLicenseBinding
 import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainView
-import io.github.wulkanowy.utils.setOnItemClickListener
-import kotlinx.android.synthetic.main.fragment_license.*
 import javax.inject.Inject
 
-class LicenseFragment : BaseFragment(), LicenseView, MainView.TitledView {
+class LicenseFragment : BaseFragment<FragmentLicenseBinding>(R.layout.fragment_license),
+    LicenseView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: LicensePresenter
 
     @Inject
-    lateinit var licenseAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+    lateinit var licenseAdapter: LicenseAdapter
 
     @Inject
     lateinit var libs: Lazy<Libs>
@@ -43,25 +39,26 @@ class LicenseFragment : BaseFragment(), LicenseView, MainView.TitledView {
         fun newInstance() = LicenseFragment()
     }
 
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.fragment_license, container, false)
-    }
-
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding = FragmentLicenseBinding.bind(view)
         presenter.onAttachView(this)
     }
 
     override fun initView() {
-        with(licenseRecycler) {
-            layoutManager = SmoothScrollLinearLayoutManager(context)
+        licenseAdapter.onClickListener = presenter::onItemSelected
+
+        with(binding.licenseRecycler) {
+            layoutManager = LinearLayoutManager(context)
             adapter = licenseAdapter
         }
-        licenseAdapter.setOnItemClickListener(presenter::onItemSelected)
     }
 
-    override fun updateData(data: List<LicenseItem>) {
-        licenseAdapter.updateDataSet(data)
+    override fun updateData(data: List<Library>) {
+        with(licenseAdapter) {
+            items = data
+            notifyDataSetChanged()
+        }
     }
 
     override fun openLicense(licenseHtml: String) {
@@ -76,7 +73,7 @@ class LicenseFragment : BaseFragment(), LicenseView, MainView.TitledView {
     }
 
     override fun showProgress(show: Boolean) {
-        licenseProgress.visibility = if (show) VISIBLE else GONE
+        binding.licenseProgress.visibility = if (show) VISIBLE else GONE
     }
 
     override fun onDestroyView() {

app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseItem.kt

@@ -1,44 +0,0 @@
-package io.github.wulkanowy.ui.modules.about.license
-
-import android.view.View
-import com.mikepenz.aboutlibraries.entity.Library
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.FlexibleViewHolder
-import io.github.wulkanowy.R
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.item_license.*
-
-class LicenseItem(val library: Library) : AbstractFlexibleItem<LicenseItem.ViewHolder>() {
-
-    override fun getLayoutRes() = R.layout.item_license
-
-    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) = ViewHolder(view, adapter)
-
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>) {
-        with(holder) {
-            licenseItemName.text = library.libraryName
-            licenseItemSummary.text = library.license?.licenseName?.takeIf { it.isNotBlank() } ?: library.libraryVersion
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as LicenseItem
-
-        if (library != other.library) return false
-
-        return true
-    }
-
-    override fun hashCode() = library.hashCode()
-
-    class ViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) : FlexibleViewHolder(view, adapter),
-        LayoutContainer {
-
-        override val containerView: View? get() = contentView
-    }
-}

app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicensePresenter.kt

@@ -1,6 +1,6 @@
 package io.github.wulkanowy.ui.modules.about.license
 
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import com.mikepenz.aboutlibraries.entity.Library
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
@@ -20,14 +20,12 @@ class LicensePresenter @Inject constructor(
         loadData()
     }
 
-    fun onItemSelected(item: AbstractFlexibleItem<*>) {
-        if (item !is LicenseItem) return
-        view?.run { item.library.license?.licenseDescription?.let { openLicense(it) } }
+    fun onItemSelected(library: Library) {
+        view?.run { library.license?.licenseDescription?.let { openLicense(it) } }
     }
 
     private fun loadData() {
-        disposable.add(Single.fromCallable { view?.appLibraries }
-            .map { it.map { library -> LicenseItem(library) } }
+        disposable.add(Single.fromCallable { view?.appLibraries.orEmpty() }
             .subscribeOn(schedulers.backgroundThread)
             .observeOn(schedulers.mainThread)
             .doOnEvent { _, _ -> view?.showProgress(false) }

app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseView.kt

@@ -9,7 +9,7 @@ interface LicenseView : BaseView {
 
     fun initView()
 
-    fun updateData(data: List<LicenseItem>)
+    fun updateData(data: List<Library>)
 
     fun openLicense(licenseHtml: String)
 

app/src/main/java/io/github/wulkanowy/ui/modules/about/logviewer/LogViewerFragment.kt

@@ -8,23 +8,22 @@ import android.net.Uri
 import android.os.Build.VERSION.SDK_INT
 import android.os.Build.VERSION_CODES.LOLLIPOP
 import android.os.Bundle
-import android.view.LayoutInflater
 import android.view.Menu
 import android.view.MenuInflater
 import android.view.MenuItem
 import android.view.View
-import android.view.ViewGroup
 import androidx.core.content.FileProvider
 import androidx.recyclerview.widget.LinearLayoutManager
 import io.github.wulkanowy.BuildConfig.APPLICATION_ID
 import io.github.wulkanowy.R
+import io.github.wulkanowy.databinding.FragmentLogviewerBinding
 import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainView
-import kotlinx.android.synthetic.main.fragment_logviewer.*
 import java.io.File
 import javax.inject.Inject
 
-class LogViewerFragment : BaseFragment(), LogViewerView, MainView.TitledView {
+class LogViewerFragment : BaseFragment<FragmentLogviewerBinding>(R.layout.fragment_logviewer),
+    LogViewerView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: LogViewerPresenter
@@ -43,13 +42,10 @@ class LogViewerFragment : BaseFragment(), LogViewerView, MainView.TitledView {
         setHasOptionsMenu(true)
     }
 
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.fragment_logviewer, container, false)
-    }
-
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
-        messageContainer = logViewerRecycler
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding = FragmentLogviewerBinding.bind(view)
+        messageContainer = binding.logViewerRecycler
         presenter.onAttachView(this)
     }
 
@@ -63,18 +59,18 @@ class LogViewerFragment : BaseFragment(), LogViewerView, MainView.TitledView {
     }
 
     override fun initView() {
-        with(logViewerRecycler) {
+        with(binding.logViewerRecycler) {
             layoutManager = LinearLayoutManager(context)
             adapter = logAdapter
         }
 
-        logViewRefreshButton.setOnClickListener { presenter.onRefreshClick() }
+        binding.logViewRefreshButton.setOnClickListener { presenter.onRefreshClick() }
     }
 
     override fun setLines(lines: List<String>) {
         logAdapter.lines = lines
         logAdapter.notifyDataSetChanged()
-        logViewerRecycler.scrollToPosition(lines.size - 1)
+        binding.logViewerRecycler.scrollToPosition(lines.size - 1)
     }
 
     override fun shareLogs(files: List<File>) {

app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountAdapter.kt

@@ -0,0 +1,46 @@
+package io.github.wulkanowy.ui.modules.account
+
+import android.annotation.SuppressLint
+import android.graphics.PorterDuff
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.databinding.ItemAccountBinding
+import io.github.wulkanowy.utils.getThemeAttrColor
+import javax.inject.Inject
+
+class AccountAdapter @Inject constructor() : RecyclerView.Adapter<AccountAdapter.ItemViewHolder>() {
+
+    var items = emptyList<Student>()
+
+    var onClickListener: (Student) -> Unit = {}
+
+    override fun getItemCount() = items.size
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = ItemViewHolder(
+        ItemAccountBinding.inflate(LayoutInflater.from(parent.context), parent, false)
+    )
+
+    @SuppressLint("SetTextI18n")
+    override fun onBindViewHolder(holder: ItemViewHolder, position: Int) {
+        val student = items[position]
+
+        with(holder.binding) {
+            accountItemName.text = "${student.studentName} ${student.className}"
+            accountItemSchool.text = student.schoolName
+
+            with(accountItemImage) {
+                val colorImage = if (student.isCurrent) context.getThemeAttrColor(R.attr.colorPrimary)
+                else context.getThemeAttrColor(R.attr.colorOnSurface, 153)
+
+                setColorFilter(colorImage, PorterDuff.Mode.SRC_IN)
+            }
+
+            root.setOnClickListener { onClickListener(student) }
+        }
+    }
+
+    class ItemViewHolder(val binding: ItemAccountBinding) : RecyclerView.ViewHolder(binding.root)
+}

app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountDialog.kt

@@ -7,23 +7,21 @@ import android.view.ViewGroup
 import android.widget.Toast
 import android.widget.Toast.LENGTH_LONG
 import androidx.appcompat.app.AlertDialog
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import androidx.recyclerview.widget.LinearLayoutManager
 import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.databinding.DialogAccountBinding
 import io.github.wulkanowy.ui.base.BaseDialogFragment
 import io.github.wulkanowy.ui.modules.login.LoginActivity
-import io.github.wulkanowy.utils.setOnItemClickListener
-import kotlinx.android.synthetic.main.dialog_account.*
 import javax.inject.Inject
 
-class AccountDialog : BaseDialogFragment(), AccountView {
+class AccountDialog : BaseDialogFragment<DialogAccountBinding>(), AccountView {
 
     @Inject
     lateinit var presenter: AccountPresenter
 
     @Inject
-    lateinit var accountAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+    lateinit var accountAdapter: AccountAdapter
 
     companion object {
         fun newInstance() = AccountDialog()
@@ -35,7 +33,7 @@ class AccountDialog : BaseDialogFragment(), AccountView {
     }
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.dialog_account, container, false)
+        return DialogAccountBinding.inflate(inflater).apply { binding = this }.root
     }
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
@@ -44,18 +42,23 @@ class AccountDialog : BaseDialogFragment(), AccountView {
     }
 
     override fun initView() {
-        accountAdapter.setOnItemClickListener { presenter.onItemSelected(it) }
+        accountAdapter.onClickListener = presenter::onItemSelected
 
-        accountDialogAdd.setOnClickListener { presenter.onAddSelected() }
-        accountDialogRemove.setOnClickListener { presenter.onRemoveSelected() }
-        accountDialogRecycler.apply {
-            layoutManager = SmoothScrollLinearLayoutManager(context)
-            adapter = accountAdapter
+        with(binding) {
+            accountDialogAdd.setOnClickListener { presenter.onAddSelected() }
+            accountDialogRemove.setOnClickListener { presenter.onRemoveSelected() }
+            accountDialogRecycler.apply {
+                layoutManager = LinearLayoutManager(context)
+                adapter = accountAdapter
+            }
         }
     }
 
-    override fun updateData(data: List<AccountItem>) {
-        accountAdapter.updateDataSet(data)
+    override fun updateData(data: List<Student>) {
+        with(accountAdapter) {
+            items = data
+            notifyDataSetChanged()
+        }
     }
 
     override fun showError(text: String, error: Throwable) {

app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountItem.kt

@@ -1,59 +0,0 @@
-package io.github.wulkanowy.ui.modules.account
-
-import android.annotation.SuppressLint
-import android.graphics.PorterDuff
-import android.view.View
-import androidx.core.graphics.ColorUtils
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.FlexibleViewHolder
-import io.github.wulkanowy.R
-import io.github.wulkanowy.data.db.entities.Student
-import io.github.wulkanowy.utils.getThemeAttrColor
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.item_account.*
-
-class AccountItem(val student: Student) : AbstractFlexibleItem<AccountItem.ViewHolder>() {
-
-    override fun getLayoutRes() = R.layout.item_account
-
-    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) = ViewHolder(view, adapter)
-
-    @SuppressLint("SetTextI18n")
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
-        val context = holder.contentView.context
-
-        val colorImage = if (student.isCurrent) context.getThemeAttrColor(R.attr.colorPrimary)
-        else ColorUtils.setAlphaComponent(context.getThemeAttrColor(R.attr.colorOnSurface), 153)
-
-        with(holder) {
-            accountItemName.text = "${student.studentName} ${student.className}"
-            accountItemSchool.text = student.schoolName
-            accountItemImage.setColorFilter(colorImage, PorterDuff.Mode.SRC_IN)
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as AccountItem
-
-        if (student != other.student) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        var result = student.hashCode()
-        result = 31 * result + student.id.toInt()
-        return result
-    }
-
-    class ViewHolder(view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter),
-        LayoutContainer {
-
-        override val containerView: View? get() = contentView
-    }
-}

app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountPresenter.kt

@@ -1,6 +1,6 @@
 package io.github.wulkanowy.ui.modules.account
 
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.services.sync.SyncManager
 import io.github.wulkanowy.ui.base.BasePresenter
@@ -63,32 +63,29 @@ class AccountPresenter @Inject constructor(
             }))
     }
 
-    fun onItemSelected(item: AbstractFlexibleItem<*>) {
-        if (item is AccountItem) {
-            Timber.i("Select student item ${item.student.id}")
-            if (item.student.isCurrent) {
-                view?.dismissView()
-            } else {
-                Timber.i("Attempt to change a student")
-                disposable.add(studentRepository.switchStudent(item.student)
-                    .subscribeOn(schedulers.backgroundThread)
-                    .observeOn(schedulers.mainThread)
-                    .doFinally { view?.dismissView() }
-                    .subscribe({
-                        Timber.i("Change a student result: Success")
-                        view?.recreateMainView()
-                    }, {
-                        Timber.i("Change a student result: An exception occurred")
-                        errorHandler.dispatch(it)
-                    }))
-            }
+    fun onItemSelected(student: Student) {
+        Timber.i("Select student item ${student.id}")
+        if (student.isCurrent) {
+            view?.dismissView()
+        } else {
+            Timber.i("Attempt to change a student")
+            disposable.add(studentRepository.switchStudent(student)
+                .subscribeOn(schedulers.backgroundThread)
+                .observeOn(schedulers.mainThread)
+                .doFinally { view?.dismissView() }
+                .subscribe({
+                    Timber.i("Change a student result: Success")
+                    view?.recreateMainView()
+                }, {
+                    Timber.i("Change a student result: An exception occurred")
+                    errorHandler.dispatch(it)
+                }))
         }
     }
 
     private fun loadData() {
         Timber.i("Loading account data started")
         disposable.add(studentRepository.getSavedStudents(false)
-            .map { it.map { item -> AccountItem(item) } }
             .subscribeOn(schedulers.backgroundThread)
             .observeOn(schedulers.mainThread)
             .subscribe({
@@ -100,4 +97,3 @@ class AccountPresenter @Inject constructor(
             }))
     }
 }
-

app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountView.kt

@@ -1,12 +1,13 @@
 package io.github.wulkanowy.ui.modules.account
 
+import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.ui.base.BaseView
 
 interface AccountView : BaseView {
 
     fun initView()
 
-    fun updateData(data: List<AccountItem>)
+    fun updateData(data: List<Student>)
 
     fun dismissView()
 

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceAdapter.kt

@@ -1,12 +1,80 @@
 package io.github.wulkanowy.ui.modules.attendance
 
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.IFlexible
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.RecyclerView
+import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Attendance
+import io.github.wulkanowy.data.repositories.attendance.SentExcuseStatus
+import io.github.wulkanowy.databinding.ItemAttendanceBinding
+import javax.inject.Inject
 
-class AttendanceAdapter<T : IFlexible<*>> : FlexibleAdapter<T>(null, null, true) {
+class AttendanceAdapter @Inject constructor() :
+    RecyclerView.Adapter<AttendanceAdapter.ItemViewHolder>() {
+
+    var items = emptyList<Attendance>()
 
     var excuseActionMode: Boolean = false
 
+    var onClickListener: (Attendance) -> Unit = {}
+
     var onExcuseCheckboxSelect: (attendanceItem: Attendance, checked: Boolean) -> Unit = { _, _ -> }
+
+    override fun getItemCount() = items.size
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = ItemViewHolder(
+        ItemAttendanceBinding.inflate(LayoutInflater.from(parent.context), parent, false)
+    )
+
+    override fun onBindViewHolder(holder: ItemViewHolder, position: Int) {
+        val item = items[position]
+
+        with(holder.binding) {
+            attendanceItemNumber.text = item.number.toString()
+            attendanceItemSubject.text = item.subject
+            attendanceItemDescription.text = item.name
+            attendanceItemAlert.visibility = item.run { if (absence && !excused) View.VISIBLE else View.INVISIBLE }
+            attendanceItemNumber.visibility = View.GONE
+            attendanceItemExcuseInfo.visibility = View.GONE
+            attendanceItemExcuseCheckbox.visibility = View.GONE
+            attendanceItemExcuseCheckbox.isChecked = false
+            attendanceItemExcuseCheckbox.setOnCheckedChangeListener { _, checked ->
+                onExcuseCheckboxSelect(item, checked)
+            }
+
+            when (if (item.excuseStatus != null) SentExcuseStatus.valueOf(item.excuseStatus) else null) {
+                SentExcuseStatus.WAITING -> {
+                    attendanceItemExcuseInfo.setImageResource(R.drawable.ic_excuse_waiting)
+                    attendanceItemExcuseInfo.visibility = View.VISIBLE
+                    attendanceItemAlert.visibility = View.INVISIBLE
+                }
+                SentExcuseStatus.DENIED -> {
+                    attendanceItemExcuseInfo.setImageResource(R.drawable.ic_excuse_denied)
+                    attendanceItemExcuseInfo.visibility = View.VISIBLE
+                }
+                else -> {
+                    if (item.excusable && excuseActionMode) {
+                        attendanceItemNumber.visibility = View.GONE
+                        attendanceItemExcuseCheckbox.visibility = View.VISIBLE
+                    } else {
+                        attendanceItemNumber.visibility = View.VISIBLE
+                        attendanceItemExcuseCheckbox.visibility = View.GONE
+                    }
+                }
+            }
+            root.setOnClickListener {
+                onClickListener(item)
+
+                with(attendanceItemExcuseCheckbox) {
+                    if (excuseActionMode && isVisible) {
+                        isChecked = !isChecked
+                    }
+                }
+            }
+        }
+    }
+
+    class ItemViewHolder(val binding: ItemAttendanceBinding) : RecyclerView.ViewHolder(binding.root)
 }

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceDialog.kt

@@ -5,13 +5,15 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.DialogFragment
-import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Attendance
+import io.github.wulkanowy.databinding.DialogAttendanceBinding
+import io.github.wulkanowy.utils.lifecycleAwareVariable
 import io.github.wulkanowy.utils.toFormattedString
-import kotlinx.android.synthetic.main.dialog_attendance.*
 
 class AttendanceDialog : DialogFragment() {
 
+    private var binding: DialogAttendanceBinding by lifecycleAwareVariable()
+
     private lateinit var attendance: Attendance
 
     companion object {
@@ -33,16 +35,18 @@ class AttendanceDialog : DialogFragment() {
     }
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.dialog_attendance, container, false)
+        return DialogAttendanceBinding.inflate(inflater).apply { binding = this }.root
     }
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
 
-        attendanceDialogSubject.text = attendance.subject
-        attendanceDialogDescription.text = attendance.name
-        attendanceDialogDate.text = attendance.date.toFormattedString()
-        attendanceDialogNumber.text = attendance.number.toString()
-        attendanceDialogClose.setOnClickListener { dismiss() }
+        with(binding) {
+            attendanceDialogSubject.text = attendance.subject
+            attendanceDialogDescription.text = attendance.name
+            attendanceDialogDate.text = attendance.date.toFormattedString()
+            attendanceDialogNumber.text = attendance.number.toString()
+            attendanceDialogClose.setOnClickListener { dismiss() }
+        }
     }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceFragment.kt

@@ -10,35 +10,32 @@ import android.view.View
 import android.view.View.GONE
 import android.view.View.INVISIBLE
 import android.view.View.VISIBLE
-import android.view.ViewGroup
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.view.ActionMode
+import androidx.recyclerview.widget.LinearLayoutManager
 import com.wdullaer.materialdatetimepicker.date.DatePickerDialog
-import eu.davidea.flexibleadapter.common.FlexibleItemDecoration
-import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Attendance
+import io.github.wulkanowy.databinding.DialogExcuseBinding
+import io.github.wulkanowy.databinding.FragmentAttendanceBinding
 import io.github.wulkanowy.ui.base.BaseFragment
+import io.github.wulkanowy.ui.widgets.DividerItemDecoration
 import io.github.wulkanowy.ui.modules.attendance.summary.AttendanceSummaryFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.utils.SchooldaysRangeLimiter
 import io.github.wulkanowy.utils.dpToPx
-import io.github.wulkanowy.utils.setOnItemClickListener
-import kotlinx.android.synthetic.main.dialog_excuse.*
-import kotlinx.android.synthetic.main.fragment_attendance.*
 import org.threeten.bp.LocalDate
 import javax.inject.Inject
 
-class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildView,
+class AttendanceFragment : BaseFragment<FragmentAttendanceBinding>(R.layout.fragment_attendance), AttendanceView, MainView.MainChildView,
     MainView.TitledView {
 
     @Inject
     lateinit var presenter: AttendancePresenter
 
     @Inject
-    lateinit var attendanceAdapter: AttendanceAdapter<AbstractFlexibleItem<*>>
+    lateinit var attendanceAdapter: AttendanceAdapter
 
     override val excuseSuccessString: String
         get() = getString(R.string.attendance_excuse_success)
@@ -54,7 +51,7 @@ class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildVie
 
     override val titleStringId get() = R.string.attendance_title
 
-    override val isViewEmpty get() = attendanceAdapter.isEmpty
+    override val isViewEmpty get() = attendanceAdapter.items.isEmpty()
 
     override val currentStackSize get() = (activity as? MainActivity)?.currentStackSize
 
@@ -91,39 +88,38 @@ class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildVie
         setHasOptionsMenu(true)
     }
 
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.fragment_attendance, container, false)
-    }
-
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
-        messageContainer = attendanceRecycler
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding = FragmentAttendanceBinding.bind(view)
+        messageContainer = binding.attendanceRecycler
         presenter.onAttachView(this, savedInstanceState?.getLong(SAVED_DATE_KEY))
     }
 
     override fun initView() {
-        attendanceAdapter.setOnItemClickListener(presenter::onAttendanceItemSelected)
-        attendanceAdapter.onExcuseCheckboxSelect = presenter::onExcuseCheckboxSelect
-
-        with(attendanceRecycler) {
-            layoutManager = SmoothScrollLinearLayoutManager(context)
-            adapter = attendanceAdapter
-            addItemDecoration(FlexibleItemDecoration(context)
-                .withDefaultDivider()
-                .withDrawDividerOnLastItem(false))
+        with(attendanceAdapter) {
+            onClickListener = presenter::onAttendanceItemSelected
+            onExcuseCheckboxSelect = presenter::onExcuseCheckboxSelect
         }
 
-        attendanceSwipe.setOnRefreshListener(presenter::onSwipeRefresh)
-        attendanceErrorRetry.setOnClickListener { presenter.onRetry() }
-        attendanceErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+        with(binding.attendanceRecycler) {
+            layoutManager = LinearLayoutManager(context)
+            adapter = attendanceAdapter
+            addItemDecoration(DividerItemDecoration(context))
+        }
 
-        attendancePreviousButton.setOnClickListener { presenter.onPreviousDay() }
-        attendanceNavDate.setOnClickListener { presenter.onPickDate() }
-        attendanceNextButton.setOnClickListener { presenter.onNextDay() }
+        with(binding) {
+            attendanceSwipe.setOnRefreshListener(presenter::onSwipeRefresh)
+            attendanceErrorRetry.setOnClickListener { presenter.onRetry() }
+            attendanceErrorDetails.setOnClickListener { presenter.onDetailsClick() }
 
-        attendanceExcuseButton.setOnClickListener { presenter.onExcuseButtonClick() }
+            attendancePreviousButton.setOnClickListener { presenter.onPreviousDay() }
+            attendanceNavDate.setOnClickListener { presenter.onPickDate() }
+            attendanceNextButton.setOnClickListener { presenter.onNextDay() }
 
-        attendanceNavContainer.setElevationCompat(requireContext().dpToPx(8f))
+            attendanceExcuseButton.setOnClickListener { presenter.onExcuseButtonClick() }
+
+            attendanceNavContainer.setElevationCompat(requireContext().dpToPx(8f))
+        }
     }
 
     override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
@@ -135,20 +131,26 @@ class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildVie
         else false
     }
 
-    override fun updateData(data: List<AttendanceItem>) {
-        attendanceAdapter.updateDataSet(data, true)
+    override fun updateData(data: List<Attendance>) {
+        with(attendanceAdapter) {
+            items = data
+            notifyDataSetChanged()
+        }
     }
 
     override fun updateNavigationDay(date: String) {
-        attendanceNavDate.text = date
+        binding.attendanceNavDate.text = date
     }
 
     override fun clearData() {
-        attendanceAdapter.clear()
+        with(attendanceAdapter) {
+            items = emptyList()
+            notifyDataSetChanged()
+        }
     }
 
     override fun resetView() {
-        attendanceRecycler.smoothScrollToPosition(0)
+        binding.attendanceRecycler.smoothScrollToPosition(0)
     }
 
     override fun onFragmentReselected() {
@@ -164,43 +166,43 @@ class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildVie
     }
 
     override fun showEmpty(show: Boolean) {
-        attendanceEmpty.visibility = if (show) VISIBLE else GONE
+        binding.attendanceEmpty.visibility = if (show) VISIBLE else GONE
     }
 
     override fun showErrorView(show: Boolean) {
-        attendanceError.visibility = if (show) VISIBLE else GONE
+        binding.attendanceError.visibility = if (show) VISIBLE else GONE
     }
 
     override fun setErrorDetails(message: String) {
-        attendanceErrorMessage.text = message
+        binding.attendanceErrorMessage.text = message
     }
 
     override fun showProgress(show: Boolean) {
-        attendanceProgress.visibility = if (show) VISIBLE else GONE
+        binding.attendanceProgress.visibility = if (show) VISIBLE else GONE
     }
 
     override fun enableSwipe(enable: Boolean) {
-        attendanceSwipe.isEnabled = enable
+        binding.attendanceSwipe.isEnabled = enable
     }
 
     override fun showContent(show: Boolean) {
-        attendanceRecycler.visibility = if (show) VISIBLE else GONE
+        binding. attendanceRecycler.visibility = if (show) VISIBLE else GONE
     }
 
     override fun hideRefresh() {
-        attendanceSwipe.isRefreshing = false
+        binding.attendanceSwipe.isRefreshing = false
     }
 
     override fun showPreButton(show: Boolean) {
-        attendancePreviousButton.visibility = if (show) VISIBLE else INVISIBLE
+        binding.attendancePreviousButton.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun showNextButton(show: Boolean) {
-        attendanceNextButton.visibility = if (show) VISIBLE else INVISIBLE
+        binding. attendanceNextButton.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun showExcuseButton(show: Boolean) {
-        attendanceExcuseButton.visibility = if (show) VISIBLE else GONE
+        binding.attendanceExcuseButton.visibility = if (show) VISIBLE else GONE
     }
 
     override fun showAttendanceDialog(lesson: Attendance) {
@@ -223,14 +225,15 @@ class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildVie
     }
 
     override fun showExcuseDialog() {
+        val dialogBinding = DialogExcuseBinding.inflate(LayoutInflater.from(context))
         AlertDialog.Builder(requireContext())
             .setTitle(R.string.attendance_excuse_title)
-            .setView(R.layout.dialog_excuse)
+            .setView(dialogBinding.root)
             .setNegativeButton(android.R.string.cancel) { _, _ -> }
             .create()
             .apply {
                 setButton(BUTTON_POSITIVE, getString(R.string.attendance_excuse_dialog_submit)) { _, _ ->
-                    presenter.onExcuseDialogSubmit(excuseReason.text?.toString().orEmpty())
+                    presenter.onExcuseDialogSubmit(dialogBinding.excuseReason.text?.toString().orEmpty())
                 }
             }.show()
     }

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceItem.kt

@@ -1,97 +0,0 @@
-package io.github.wulkanowy.ui.modules.attendance
-
-import android.view.View
-import android.view.View.GONE
-import android.view.View.INVISIBLE
-import android.view.View.VISIBLE
-import androidx.core.view.isVisible
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.FlexibleViewHolder
-import io.github.wulkanowy.R
-import io.github.wulkanowy.data.db.entities.Attendance
-import io.github.wulkanowy.data.repositories.attendance.SentExcuseStatus
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.item_attendance.*
-
-class AttendanceItem(val attendance: Attendance) :
-    AbstractFlexibleItem<AttendanceItem.ViewHolder>() {
-
-    override fun getLayoutRes() = R.layout.item_attendance
-
-    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>): ViewHolder {
-        return ViewHolder(view, adapter)
-    }
-
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
-        holder.apply {
-            attendanceItemNumber.text = attendance.number.toString()
-            attendanceItemSubject.text = attendance.subject
-            attendanceItemDescription.text = attendance.name
-            attendanceItemAlert.visibility = attendance.run { if (absence && !excused) VISIBLE else INVISIBLE }
-            attendanceItemNumber.visibility = GONE
-            attendanceItemExcuseInfo.visibility = GONE
-            attendanceItemExcuseCheckbox.visibility = GONE
-            attendanceItemExcuseCheckbox.isChecked = false
-            attendanceItemExcuseCheckbox.setOnCheckedChangeListener { _, checked ->
-                (adapter as AttendanceAdapter).onExcuseCheckboxSelect(attendance, checked)
-            }
-
-            when (if (attendance.excuseStatus != null) SentExcuseStatus.valueOf(attendance.excuseStatus) else null) {
-                SentExcuseStatus.WAITING -> {
-                    attendanceItemExcuseInfo.setImageResource(R.drawable.ic_excuse_waiting)
-                    attendanceItemExcuseInfo.visibility = VISIBLE
-                    attendanceItemAlert.visibility = INVISIBLE
-                }
-                SentExcuseStatus.DENIED -> {
-                    attendanceItemExcuseInfo.setImageResource(R.drawable.ic_excuse_denied)
-                    attendanceItemExcuseInfo.visibility = VISIBLE
-                }
-                else -> {
-                    if (attendance.excusable && (adapter as AttendanceAdapter).excuseActionMode) {
-                        attendanceItemNumber.visibility = GONE
-                        attendanceItemExcuseCheckbox.visibility = VISIBLE
-                    } else {
-                        attendanceItemNumber.visibility = VISIBLE
-                        attendanceItemExcuseCheckbox.visibility = GONE
-                    }
-                }
-            }
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as AttendanceItem
-
-        if (attendance != other.attendance) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        var result = attendance.hashCode()
-        result = 31 * result + attendance.id.toInt()
-        return result
-    }
-
-    class ViewHolder(view: View, val adapter: FlexibleAdapter<*>) :
-        FlexibleViewHolder(view, adapter),
-        LayoutContainer {
-
-        override val containerView: View
-            get() = contentView
-
-        override fun onClick(view: View?) {
-            super.onClick(view)
-            attendanceItemExcuseCheckbox.apply {
-                if ((adapter as AttendanceAdapter).excuseActionMode && isVisible) {
-                    isChecked = !isChecked
-                }
-            }
-        }
-    }
-}

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceModule.kt

@@ -1,12 +0,0 @@
-package io.github.wulkanowy.ui.modules.attendance
-
-import dagger.Module
-import dagger.Provides
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-
-@Module
-class AttendanceModule {
-
-    @Provides
-    fun provideAttendanceFlexibleAdapter() = AttendanceAdapter<AbstractFlexibleItem<*>>()
-}

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendancePresenter.kt

@@ -1,7 +1,6 @@
 package io.github.wulkanowy.ui.modules.attendance
 
 import android.annotation.SuppressLint
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.db.entities.Attendance
 import io.github.wulkanowy.data.repositories.attendance.AttendanceRepository
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
@@ -111,11 +110,11 @@ class AttendancePresenter @Inject constructor(
         view?.finishActionMode()
     }
 
-    fun onAttendanceItemSelected(item: AbstractFlexibleItem<*>?) {
+    fun onAttendanceItemSelected(attendance: Attendance) {
         view?.apply {
-            if (item is AttendanceItem && !excuseActionMode) {
-                Timber.i("Select attendance item ${item.attendance.id}")
-                showAttendanceDialog(item.attendance)
+            if (!excuseActionMode) {
+                Timber.i("Select attendance item ${attendance.id}")
+                showAttendanceDialog(attendance)
             }
         }
     }
@@ -197,9 +196,7 @@ class AttendancePresenter @Inject constructor(
                     if (prefRepository.isShowPresent) list
                     else list.filter { !it.presence }
                 }
-                .delay(200, MILLISECONDS)
-                .map { items -> items.map { AttendanceItem(it) } }
-                .map { items -> items.sortedBy { it.attendance.number } }
+                .map { items -> items.sortedBy { it.number } }
                 .subscribeOn(schedulers.backgroundThread)
                 .observeOn(schedulers.mainThread)
                 .doFinally {
@@ -216,7 +213,7 @@ class AttendancePresenter @Inject constructor(
                         showEmpty(it.isEmpty())
                         showErrorView(false)
                         showContent(it.isNotEmpty())
-                        showExcuseButton(it.any { item -> item.attendance.excusable })
+                        showExcuseButton(it.any { item -> item.excusable })
                     }
                     analytics.logEvent("load_attendance", "items" to it.size, "force_refresh" to forceRefresh)
                 }) {
@@ -236,7 +233,6 @@ class AttendancePresenter @Inject constructor(
                         attendanceRepository.excuseForAbsence(student, semester, toExcuseList, reason)
                     }
                 }
-                .delay(200, MILLISECONDS)
                 .subscribeOn(schedulers.backgroundThread)
                 .observeOn(schedulers.mainThread)
                 .doOnSubscribe {

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceView.kt

@@ -18,7 +18,7 @@ interface AttendanceView : BaseView {
 
     fun initView()
 
-    fun updateData(data: List<AttendanceItem>)
+    fun updateData(data: List<Attendance>)
 
     fun updateNavigationDay(date: String)
 

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryAdapter.kt

@@ -0,0 +1,101 @@
+package io.github.wulkanowy.ui.modules.attendance.summary
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.AttendanceSummary
+import io.github.wulkanowy.databinding.ItemAttendanceSummaryBinding
+import io.github.wulkanowy.databinding.ScrollableHeaderAttendanceSummaryBinding
+import io.github.wulkanowy.utils.calculatePercentage
+import io.github.wulkanowy.utils.getFormattedName
+import org.threeten.bp.Month
+import java.util.Locale
+import javax.inject.Inject
+
+class AttendanceSummaryAdapter @Inject constructor() :
+    RecyclerView.Adapter<RecyclerView.ViewHolder>() {
+
+    private enum class ViewType(val id: Int) {
+        HEADER(1),
+        ITEM(2)
+    }
+
+    var items = emptyList<AttendanceSummary>()
+
+    override fun getItemCount() = if (items.isNotEmpty()) items.size + 2 else 0
+
+    override fun getItemViewType(position: Int) = when (position) {
+        0 -> ViewType.HEADER.id
+        else -> ViewType.ITEM.id
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
+        val inflater = LayoutInflater.from(parent.context)
+
+        return when (viewType) {
+            ViewType.HEADER.id -> HeaderViewHolder(ScrollableHeaderAttendanceSummaryBinding.inflate(inflater, parent, false))
+            ViewType.ITEM.id -> ItemViewHolder(ItemAttendanceSummaryBinding.inflate(inflater, parent, false))
+            else -> throw IllegalStateException()
+        }
+    }
+
+    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
+        when (holder) {
+            is HeaderViewHolder -> bindHeaderViewHolder(holder.binding)
+            is ItemViewHolder -> bindItemViewHolder(holder.binding, position - 2)
+        }
+    }
+
+    private fun bindHeaderViewHolder(binding: ScrollableHeaderAttendanceSummaryBinding) {
+        binding.attendanceSummaryScrollableHeaderPercentage.text = formatPercentage(items.calculatePercentage())
+    }
+
+    private fun bindItemViewHolder(binding: ItemAttendanceSummaryBinding, position: Int) {
+        val item = if (position == -1) getTotalItem() else items[position]
+
+        with(binding) {
+            attendanceSummaryMonth.text = when (position) {
+                -1 -> root.context.getString(R.string.attendance_summary_total)
+                else -> item.month.getFormattedName()
+            }
+            attendanceSummaryPercentage.text = when (position) {
+                -1 -> formatPercentage(items.calculatePercentage())
+                else -> formatPercentage(item.calculatePercentage())
+            }
+
+            attendanceSummaryPresent.text = item.presence.toString()
+            attendanceSummaryAbsenceUnexcused.text = item.absence.toString()
+            attendanceSummaryAbsenceExcused.text = item.absenceExcused.toString()
+            attendanceSummaryAbsenceSchool.text = item.absenceForSchoolReasons.toString()
+            attendanceSummaryExemption.text = item.exemption.toString()
+            attendanceSummaryLatenessUnexcused.text = item.lateness.toString()
+            attendanceSummaryLatenessExcused.text = item.latenessExcused.toString()
+        }
+    }
+
+    private fun getTotalItem() = AttendanceSummary(
+        month = Month.APRIL,
+        presence = items.sumBy { it.presence },
+        absence = items.sumBy { it.absence },
+        absenceExcused = items.sumBy { it.absenceExcused },
+        absenceForSchoolReasons = items.sumBy { it.absenceForSchoolReasons },
+        exemption = items.sumBy { it.exemption },
+        lateness = items.sumBy { it.lateness },
+        latenessExcused = items.sumBy { it.latenessExcused },
+        diaryId = -1,
+        studentId = -1,
+        subjectId = -1
+    )
+
+    private fun formatPercentage(percentage: Double): String {
+        return if (percentage == 0.0) "0%"
+        else "${String.format(Locale.FRANCE, "%.2f", percentage)}%"
+    }
+
+    class HeaderViewHolder(val binding: ScrollableHeaderAttendanceSummaryBinding) :
+        RecyclerView.ViewHolder(binding.root)
+
+    class ItemViewHolder(val binding: ItemAttendanceSummaryBinding) :
+        RecyclerView.ViewHolder(binding.root)
+}

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryFragment.kt

@@ -1,32 +1,31 @@
 package io.github.wulkanowy.ui.modules.attendance.summary
 
 import android.os.Bundle
-import android.view.LayoutInflater
 import android.view.View
 import android.view.View.GONE
 import android.view.View.INVISIBLE
 import android.view.View.VISIBLE
-import android.view.ViewGroup
 import android.widget.ArrayAdapter
 import android.widget.TextView
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import androidx.recyclerview.widget.LinearLayoutManager
 import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.AttendanceSummary
+import io.github.wulkanowy.databinding.FragmentAttendanceSummaryBinding
 import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.setOnItemSelectedListener
-import kotlinx.android.synthetic.main.fragment_attendance_summary.*
 import javax.inject.Inject
 
-class AttendanceSummaryFragment : BaseFragment(), AttendanceSummaryView, MainView.TitledView {
+class AttendanceSummaryFragment :
+    BaseFragment<FragmentAttendanceSummaryBinding>(R.layout.fragment_attendance_summary),
+    AttendanceSummaryView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: AttendanceSummaryPresenter
 
     @Inject
-    lateinit var attendanceSummaryAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+    lateinit var attendanceSummaryAdapter: AttendanceSummaryAdapter
 
     private lateinit var subjectsAdapter: ArrayAdapter<String>
 
@@ -36,41 +35,38 @@ class AttendanceSummaryFragment : BaseFragment(), AttendanceSummaryView, MainVie
         fun newInstance() = AttendanceSummaryFragment()
     }
 
-    override val totalString get() = getString(R.string.attendance_summary_total)
-
     override val titleStringId get() = R.string.attendance_title
 
-    override val isViewEmpty get() = attendanceSummaryAdapter.isEmpty
+    override val isViewEmpty get() = attendanceSummaryAdapter.items.isEmpty()
 
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.fragment_attendance_summary, container, false)
-    }
-
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
-        messageContainer = attendanceSummaryRecycler
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding = FragmentAttendanceSummaryBinding.bind(view)
+        messageContainer = binding.attendanceSummaryRecycler
         presenter.onAttachView(this, savedInstanceState?.getInt(SAVED_SUBJECT_KEY))
     }
 
     override fun initView() {
-        with(attendanceSummaryRecycler) {
-            layoutManager = SmoothScrollLinearLayoutManager(context)
+        with(binding.attendanceSummaryRecycler) {
+            layoutManager = LinearLayoutManager(context)
             adapter = attendanceSummaryAdapter
         }
 
-        attendanceSummarySwipe.setOnRefreshListener(presenter::onSwipeRefresh)
-        attendanceSummaryErrorRetry.setOnClickListener { presenter.onRetry() }
-        attendanceSummaryErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+        with(binding) {
+            attendanceSummarySwipe.setOnRefreshListener(presenter::onSwipeRefresh)
+            attendanceSummaryErrorRetry.setOnClickListener { presenter.onRetry() }
+            attendanceSummaryErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+        }
 
         subjectsAdapter = ArrayAdapter(requireContext(), android.R.layout.simple_spinner_item, mutableListOf())
         subjectsAdapter.setDropDownViewResource(R.layout.item_attendance_summary_subject)
 
-        with(attendanceSummarySubjects) {
+        with(binding.attendanceSummarySubjects) {
             adapter = subjectsAdapter
             setOnItemSelectedListener<TextView> { presenter.onSubjectSelected(it?.text?.toString()) }
         }
 
-        attendanceSummarySubjectsContainer.setElevationCompat(requireContext().dpToPx(1f))
+        binding.attendanceSummarySubjectsContainer.setElevationCompat(requireContext().dpToPx(1f))
     }
 
     override fun updateSubjects(data: ArrayList<String>) {
@@ -81,48 +77,50 @@ class AttendanceSummaryFragment : BaseFragment(), AttendanceSummaryView, MainVie
         }
     }
 
-    override fun updateDataSet(data: List<AttendanceSummaryItem>, header: AttendanceSummaryScrollableHeader) {
+    override fun updateDataSet(data: List<AttendanceSummary>) {
         with(attendanceSummaryAdapter) {
-            updateDataSet(data, true)
-            removeAllScrollableHeaders()
-            addScrollableHeader(header)
+            items = data
+            notifyDataSetChanged()
         }
     }
 
     override fun clearView() {
-        attendanceSummaryAdapter.clear()
+        with(attendanceSummaryAdapter) {
+            items = emptyList()
+            notifyDataSetChanged()
+        }
     }
 
     override fun showEmpty(show: Boolean) {
-        attendanceSummaryEmpty.visibility = if (show) VISIBLE else GONE
+        binding.attendanceSummaryEmpty.visibility = if (show) VISIBLE else GONE
     }
 
     override fun showErrorView(show: Boolean) {
-        attendanceSummaryError.visibility = if (show) VISIBLE else GONE
+        binding.attendanceSummaryError.visibility = if (show) VISIBLE else GONE
     }
 
     override fun setErrorDetails(message: String) {
-        attendanceSummaryErrorMessage.text = message
+        binding.attendanceSummaryErrorMessage.text = message
     }
 
     override fun showProgress(show: Boolean) {
-        attendanceSummaryProgress.visibility = if (show) VISIBLE else GONE
+        binding.attendanceSummaryProgress.visibility = if (show) VISIBLE else GONE
     }
 
     override fun enableSwipe(enable: Boolean) {
-        attendanceSummarySwipe.isEnabled = enable
+        binding.attendanceSummarySwipe.isEnabled = enable
     }
 
     override fun showContent(show: Boolean) {
-        attendanceSummaryRecycler.visibility = if (show) VISIBLE else GONE
+        binding.attendanceSummaryRecycler.visibility = if (show) VISIBLE else GONE
     }
 
     override fun showSubjects(show: Boolean) {
-        attendanceSummarySubjectsContainer.visibility = if (show) VISIBLE else INVISIBLE
+        binding.attendanceSummarySubjectsContainer.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun hideRefresh() {
-        attendanceSummarySwipe.isRefreshing = false
+        binding.attendanceSummarySwipe.isRefreshing = false
     }
 
     override fun onSaveInstanceState(outState: Bundle) {
@@ -131,7 +129,7 @@ class AttendanceSummaryFragment : BaseFragment(), AttendanceSummaryView, MainVie
     }
 
     override fun onDestroyView() {
-        super.onDestroyView()
         presenter.onDetachView()
+        super.onDestroyView()
     }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryItem.kt

@@ -1,80 +0,0 @@
-package io.github.wulkanowy.ui.modules.attendance.summary
-
-import android.view.View
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.FlexibleViewHolder
-import io.github.wulkanowy.R
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.item_attendance_summary.*
-
-class AttendanceSummaryItem(
-    private val month: String,
-    private val percentage: String,
-    private val present: String,
-    private val absence: String,
-    private val excusedAbsence: String,
-    private val schoolAbsence: String,
-    private val exemption: String,
-    private val lateness: String,
-    private val excusedLateness: String
-) : AbstractFlexibleItem<AttendanceSummaryItem.ViewHolder>() {
-
-    override fun getLayoutRes() = R.layout.item_attendance_summary
-
-    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>): ViewHolder {
-        return ViewHolder(view, adapter)
-    }
-
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
-        holder.apply {
-            attendanceSummaryMonth.text = month
-            attendanceSummaryPercentage.text = percentage
-            attendanceSummaryPresent.text = present
-            attendanceSummaryAbsenceUnexcused.text = absence
-            attendanceSummaryAbsenceExcused.text = excusedAbsence
-            attendanceSummaryAbsenceSchool.text = schoolAbsence
-            attendanceSummaryExemption.text = exemption
-            attendanceSummaryLatenessUnexcused.text = lateness
-            attendanceSummaryLatenessExcused.text = excusedLateness
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as AttendanceSummaryItem
-
-        if (month != other.month) return false
-        if (percentage != other.percentage) return false
-        if (present != other.present) return false
-        if (absence != other.absence) return false
-        if (excusedAbsence != other.excusedAbsence) return false
-        if (schoolAbsence != other.schoolAbsence) return false
-        if (exemption != other.exemption) return false
-        if (lateness != other.lateness) return false
-        if (excusedLateness != other.excusedLateness) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        var result = month.hashCode()
-        result = 31 * result + percentage.hashCode()
-        result = 31 * result + present.hashCode()
-        result = 31 * result + absence.hashCode()
-        result = 31 * result + excusedAbsence.hashCode()
-        result = 31 * result + schoolAbsence.hashCode()
-        result = 31 * result + exemption.hashCode()
-        result = 31 * result + lateness.hashCode()
-        result = 31 * result + excusedLateness.hashCode()
-        return result
-    }
-
-    class ViewHolder(view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter), LayoutContainer {
-        override val containerView: View
-            get() = contentView
-    }
-}

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryPresenter.kt

@@ -1,6 +1,5 @@
 package io.github.wulkanowy.ui.modules.attendance.summary
 
-import io.github.wulkanowy.data.db.entities.AttendanceSummary
 import io.github.wulkanowy.data.db.entities.Subject
 import io.github.wulkanowy.data.repositories.attendancesummary.AttendanceSummaryRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
@@ -10,13 +9,8 @@ import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
-import io.github.wulkanowy.utils.calculatePercentage
-import io.github.wulkanowy.utils.getFormattedName
 import org.threeten.bp.Month
 import timber.log.Timber
-import java.lang.String.format
-import java.util.Locale.FRANCE
-import java.util.concurrent.TimeUnit.MILLISECONDS
 import javax.inject.Inject
 
 class AttendanceSummaryPresenter @Inject constructor(
@@ -88,8 +82,7 @@ class AttendanceSummaryPresenter @Inject constructor(
                         attendanceSummaryRepository.getAttendanceSummary(student, it, subjectId, forceRefresh)
                     }
                 }
-                .map { createAttendanceSummaryItems(it) to AttendanceSummaryScrollableHeader(formatPercentage(it.calculatePercentage())) }
-                .delay(200, MILLISECONDS)
+                .map { items -> items.sortedByDescending { if (it.month.value <= Month.JUNE.value) it.month.value + 12 else it.month.value } }
                 .subscribeOn(schedulers.backgroundThread)
                 .observeOn(schedulers.mainThread)
                 .doFinally {
@@ -102,11 +95,11 @@ class AttendanceSummaryPresenter @Inject constructor(
                 .subscribe({
                     Timber.i("Loading attendance summary result: Success")
                     view?.apply {
-                        showEmpty(it.first.isEmpty())
-                        showContent(it.first.isNotEmpty())
-                        updateDataSet(it.first, it.second)
+                        showEmpty(it.isEmpty())
+                        showContent(it.isNotEmpty())
+                        updateDataSet(it)
                     }
-                    analytics.logEvent("load_attendance_summary", "items" to it.first.size, "force_refresh" to forceRefresh, "item_id" to subjectId)
+                    analytics.logEvent("load_attendance_summary", "items" to it.size, "force_refresh" to forceRefresh, "item_id" to subjectId)
                 }) {
                     Timber.i("Loading attendance summary result: An exception occurred")
                     errorHandler.dispatch(it)
@@ -150,42 +143,4 @@ class AttendanceSummaryPresenter @Inject constructor(
             })
         )
     }
-
-    private fun createAttendanceSummaryTotalItem(attendanceSummary: List<AttendanceSummary>): AttendanceSummaryItem {
-        return AttendanceSummaryItem(
-            month = view?.totalString.orEmpty(),
-            percentage = formatPercentage(attendanceSummary.calculatePercentage()),
-            present = attendanceSummary.sumBy { it.presence }.toString(),
-            absence = attendanceSummary.sumBy { it.absence }.toString(),
-            excusedAbsence = attendanceSummary.sumBy { it.absenceExcused }.toString(),
-            schoolAbsence = attendanceSummary.sumBy { it.absenceForSchoolReasons }.toString(),
-            exemption = attendanceSummary.sumBy { it.exemption }.toString(),
-            lateness = attendanceSummary.sumBy { it.lateness }.toString(),
-            excusedLateness = attendanceSummary.sumBy { it.latenessExcused }.toString()
-        )
-    }
-
-    private fun createAttendanceSummaryItems(attendanceSummary: List<AttendanceSummary>): List<AttendanceSummaryItem> {
-        if (attendanceSummary.isEmpty()) return emptyList()
-        return listOf(createAttendanceSummaryTotalItem(attendanceSummary)) + attendanceSummary.sortedByDescending {
-            if (it.month.value <= Month.JUNE.value) it.month.value + 12 else it.month.value
-        }.map {
-            AttendanceSummaryItem(
-                month = it.month.getFormattedName(),
-                percentage = formatPercentage(it.calculatePercentage()),
-                present = it.presence.toString(),
-                absence = it.absence.toString(),
-                excusedAbsence = it.absenceExcused.toString(),
-                schoolAbsence = it.absenceForSchoolReasons.toString(),
-                exemption = it.exemption.toString(),
-                lateness = it.lateness.toString(),
-                excusedLateness = it.latenessExcused.toString()
-            )
-        }
-    }
-
-    private fun formatPercentage(percentage: Double): String {
-        return if (percentage == 0.0) "0%"
-        else "${format(FRANCE, "%.2f", percentage)}%"
-    }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryScrollableHeader.kt

@@ -1,46 +0,0 @@
-package io.github.wulkanowy.ui.modules.attendance.summary
-
-import android.view.View
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.FlexibleViewHolder
-import io.github.wulkanowy.R
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.scrollable_header_attendance_summary.*
-
-class AttendanceSummaryScrollableHeader(private val percentage: String) :
-    AbstractFlexibleItem<AttendanceSummaryScrollableHeader.ViewHolder>() {
-
-    override fun getLayoutRes() = R.layout.scrollable_header_attendance_summary
-
-    override fun createViewHolder(view: View?, adapter: FlexibleAdapter<IFlexible<*>>?): ViewHolder {
-        return ViewHolder(view, adapter)
-    }
-
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>?, holder: ViewHolder?, position: Int, payloads: MutableList<Any>?) {
-        holder?.apply { attendanceSummaryScrollableHeaderPercentage.text = percentage }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as AttendanceSummaryScrollableHeader
-
-        if (percentage != other.percentage) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        return percentage.hashCode()
-    }
-
-    class ViewHolder(view: View?, adapter: FlexibleAdapter<IFlexible<*>>?) : FlexibleViewHolder(view, adapter),
-        LayoutContainer {
-
-        override val containerView: View?
-            get() = contentView
-    }
-}

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryView.kt

@@ -1,11 +1,10 @@
 package io.github.wulkanowy.ui.modules.attendance.summary
 
+import io.github.wulkanowy.data.db.entities.AttendanceSummary
 import io.github.wulkanowy.ui.base.BaseView
 
 interface AttendanceSummaryView : BaseView {
 
-    val totalString: String
-
     val isViewEmpty: Boolean
 
     fun initView()
@@ -24,7 +23,7 @@ interface AttendanceSummaryView : BaseView {
 
     fun setErrorDetails(message: String)
 
-    fun updateDataSet(data: List<AttendanceSummaryItem>, header: AttendanceSummaryScrollableHeader)
+    fun updateDataSet(data: List<AttendanceSummary>)
 
     fun updateSubjects(data: ArrayList<String>)
 

app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamAdapter.kt

@@ -0,0 +1,65 @@
+package io.github.wulkanowy.ui.modules.exam
+
+import android.annotation.SuppressLint
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import io.github.wulkanowy.data.db.entities.Exam
+import io.github.wulkanowy.databinding.HeaderExamBinding
+import io.github.wulkanowy.databinding.ItemExamBinding
+import io.github.wulkanowy.utils.toFormattedString
+import io.github.wulkanowy.utils.weekDayName
+import org.threeten.bp.LocalDate
+import javax.inject.Inject
+
+class ExamAdapter @Inject constructor() : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
+
+    var items = emptyList<ExamItem<*>>()
+
+    var onClickListener: (Exam) -> Unit = {}
+
+    override fun getItemCount() = items.size
+
+    override fun getItemViewType(position: Int) = items[position].viewType.id
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
+        val inflater = LayoutInflater.from(parent.context)
+
+        return when (viewType) {
+            ExamItem.ViewType.HEADER.id -> HeaderViewHolder(HeaderExamBinding.inflate(inflater, parent, false))
+            ExamItem.ViewType.ITEM.id -> ItemViewHolder(ItemExamBinding.inflate(inflater, parent, false))
+            else -> throw IllegalStateException()
+        }
+    }
+
+    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
+        when (holder) {
+            is HeaderViewHolder -> bindHeaderViewHolder(holder.binding, items[position].value as LocalDate)
+            is ItemViewHolder -> bindItemViewHolder(holder.binding, items[position].value as Exam)
+        }
+    }
+
+    @SuppressLint("DefaultLocale")
+    private fun bindHeaderViewHolder(binding: HeaderExamBinding, date: LocalDate) {
+        with(binding) {
+            examHeaderDay.text = date.weekDayName.capitalize()
+            examHeaderDate.text = date.toFormattedString()
+        }
+    }
+
+    private fun bindItemViewHolder(binding: ItemExamBinding, exam: Exam) {
+        with(binding) {
+            examItemSubject.text = exam.subject
+            examItemTeacher.text = exam.teacher
+            examItemType.text = exam.type
+
+            root.setOnClickListener { onClickListener(exam) }
+        }
+    }
+
+    private class HeaderViewHolder(val binding: HeaderExamBinding) :
+        RecyclerView.ViewHolder(binding.root)
+
+    private class ItemViewHolder(val binding: ItemExamBinding) :
+        RecyclerView.ViewHolder(binding.root)
+}

app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamDialog.kt

@@ -5,13 +5,15 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.DialogFragment
-import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Exam
+import io.github.wulkanowy.databinding.DialogExamBinding
+import io.github.wulkanowy.utils.lifecycleAwareVariable
 import io.github.wulkanowy.utils.toFormattedString
-import kotlinx.android.synthetic.main.dialog_exam.*
 
 class ExamDialog : DialogFragment() {
 
+    private var binding: DialogExamBinding by lifecycleAwareVariable()
+
     private lateinit var exam: Exam
 
     companion object {
@@ -33,18 +35,20 @@ class ExamDialog : DialogFragment() {
     }
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.dialog_exam, container, false)
+        return DialogExamBinding.inflate(inflater).apply { binding = this }.root
     }
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
 
-        examDialogSubjectValue.text = exam.subject
-        examDialogTypeValue.text = exam.type
-        examDialogTeacherValue.text = exam.teacher
-        examDialogDateValue.text = exam.entryDate.toFormattedString()
-        examDialogDescriptionValue.text = exam.description
+        with(binding) {
+            examDialogSubjectValue.text = exam.subject
+            examDialogTypeValue.text = exam.type
+            examDialogTeacherValue.text = exam.teacher
+            examDialogDateValue.text = exam.entryDate.toFormattedString()
+            examDialogDescriptionValue.text = exam.description
 
-        examDialogClose.setOnClickListener { dismiss() }
+            examDialogClose.setOnClickListener { dismiss() }
+        }
     }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamFragment.kt

@@ -1,33 +1,29 @@
 package io.github.wulkanowy.ui.modules.exam
 
 import android.os.Bundle
-import android.view.LayoutInflater
 import android.view.View
 import android.view.View.GONE
 import android.view.View.INVISIBLE
 import android.view.View.VISIBLE
-import android.view.ViewGroup
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.common.FlexibleItemDecoration
-import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import androidx.recyclerview.widget.LinearLayoutManager
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Exam
+import io.github.wulkanowy.databinding.FragmentExamBinding
 import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.ui.widgets.DividerItemDecoration
 import io.github.wulkanowy.utils.dpToPx
-import io.github.wulkanowy.utils.setOnItemClickListener
-import kotlinx.android.synthetic.main.fragment_exam.*
 import javax.inject.Inject
 
-class ExamFragment : BaseFragment(), ExamView, MainView.MainChildView, MainView.TitledView {
+class ExamFragment : BaseFragment<FragmentExamBinding>(R.layout.fragment_exam), ExamView,
+    MainView.MainChildView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: ExamPresenter
 
     @Inject
-    lateinit var examAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+    lateinit var examAdapter: ExamAdapter
 
     companion object {
         private const val SAVED_DATE_KEY = "CURRENT_DATE"
@@ -37,57 +33,60 @@ class ExamFragment : BaseFragment(), ExamView, MainView.MainChildView, MainView.
 
     override val titleStringId get() = R.string.exam_title
 
-    override val isViewEmpty get() = examAdapter.isEmpty
+    override val isViewEmpty get() = examAdapter.items.isEmpty()
 
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.fragment_exam, container, false)
-    }
-
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
-        messageContainer = examRecycler
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding = FragmentExamBinding.bind(view)
+        messageContainer = binding.examRecycler
         presenter.onAttachView(this, savedInstanceState?.getLong(SAVED_DATE_KEY))
     }
 
     override fun initView() {
-        examAdapter.setOnItemClickListener(presenter::onExamItemSelected)
+        examAdapter.onClickListener = presenter::onExamItemSelected
 
-        with(examRecycler) {
-            layoutManager = SmoothScrollLinearLayoutManager(context)
+        with(binding.examRecycler) {
+            layoutManager = LinearLayoutManager(context)
             adapter = examAdapter
-            addItemDecoration(FlexibleItemDecoration(context)
-                .withDefaultDivider(R.layout.item_exam)
-                .withDrawDividerOnLastItem(false))
+            addItemDecoration(DividerItemDecoration(context))
         }
 
-        examSwipe.setOnRefreshListener(presenter::onSwipeRefresh)
-        examErrorRetry.setOnClickListener { presenter.onRetry() }
-        examErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+        with(binding) {
+            examSwipe.setOnRefreshListener(presenter::onSwipeRefresh)
+            examErrorRetry.setOnClickListener { presenter.onRetry() }
+            examErrorDetails.setOnClickListener { presenter.onDetailsClick() }
 
-        examPreviousButton.setOnClickListener { presenter.onPreviousWeek() }
-        examNextButton.setOnClickListener { presenter.onNextWeek() }
+            examPreviousButton.setOnClickListener { presenter.onPreviousWeek() }
+            examNextButton.setOnClickListener { presenter.onNextWeek() }
 
-        examNavContainer.setElevationCompat(requireContext().dpToPx(8f))
+            examNavContainer.setElevationCompat(requireContext().dpToPx(8f))
+        }
     }
 
     override fun hideRefresh() {
-        examSwipe.isRefreshing = false
+        binding.examSwipe.isRefreshing = false
     }
 
-    override fun updateData(data: List<ExamItem>) {
-        examAdapter.updateDataSet(data, true)
+    override fun updateData(data: List<ExamItem<*>>) {
+        with(examAdapter) {
+            items = data
+            notifyDataSetChanged()
+        }
     }
 
     override fun updateNavigationWeek(date: String) {
-        examNavDate.text = date
+        binding.examNavDate.text = date
     }
 
     override fun clearData() {
-        examAdapter.clear()
+        with(examAdapter) {
+            items = emptyList()
+            notifyDataSetChanged()
+        }
     }
 
     override fun resetView() {
-        examRecycler.scrollToPosition(0)
+        binding.examRecycler.scrollToPosition(0)
     }
 
     override fun onFragmentReselected() {
@@ -95,35 +94,35 @@ class ExamFragment : BaseFragment(), ExamView, MainView.MainChildView, MainView.
     }
 
     override fun showEmpty(show: Boolean) {
-        examEmpty.visibility = if (show) VISIBLE else GONE
+        binding.examEmpty.visibility = if (show) VISIBLE else GONE
     }
 
     override fun showErrorView(show: Boolean) {
-        examError.visibility = if (show) VISIBLE else GONE
+        binding.examError.visibility = if (show) VISIBLE else GONE
     }
 
     override fun setErrorDetails(message: String) {
-        examErrorMessage.text = message
+        binding.examErrorMessage.text = message
     }
 
     override fun showProgress(show: Boolean) {
-        examProgress.visibility = if (show) VISIBLE else GONE
+        binding.examProgress.visibility = if (show) VISIBLE else GONE
     }
 
     override fun enableSwipe(enable: Boolean) {
-        examSwipe.isEnabled = enable
+        binding.examSwipe.isEnabled = enable
     }
 
     override fun showContent(show: Boolean) {
-        examRecycler.visibility = if (show) VISIBLE else GONE
+        binding.examRecycler.visibility = if (show) VISIBLE else GONE
     }
 
     override fun showPreButton(show: Boolean) {
-        examPreviousButton.visibility = if (show) VISIBLE else INVISIBLE
+        binding.examPreviousButton.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun showNextButton(show: Boolean) {
-        examNextButton.visibility = if (show) VISIBLE else INVISIBLE
+        binding.examNextButton.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun showExamDialog(exam: Exam) {

app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamHeader.kt

@@ -1,52 +0,0 @@
-package io.github.wulkanowy.ui.modules.exam
-
-import android.view.View
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractHeaderItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.ExpandableViewHolder
-import io.github.wulkanowy.R
-import io.github.wulkanowy.utils.toFormattedString
-import io.github.wulkanowy.utils.weekDayName
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.header_exam.*
-import org.threeten.bp.LocalDate
-
-class ExamHeader(private val date: LocalDate) : AbstractHeaderItem<ExamHeader.ViewHolder>() {
-
-    override fun getLayoutRes() = R.layout.header_exam
-
-    override fun createViewHolder(view: View?, adapter: FlexibleAdapter<IFlexible<*>>?): ViewHolder {
-        return ViewHolder(view, adapter)
-    }
-
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>?, holder: ViewHolder,
-                                position: Int, payloads: MutableList<Any>?) {
-        holder.run {
-            examHeaderDay.text = date.weekDayName.capitalize()
-            examHeaderDate.text = date.toFormattedString()
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as ExamHeader
-
-        if (date != other.date) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        return date.hashCode()
-    }
-
-    class ViewHolder(view: View?, adapter: FlexibleAdapter<IFlexible<*>>?) : ExpandableViewHolder(view, adapter),
-            LayoutContainer {
-
-        override val containerView: View
-            get() = contentView
-    }
-}

app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamItem.kt

@@ -1,50 +1,9 @@
 package io.github.wulkanowy.ui.modules.exam
 
-import android.view.View
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractSectionableItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.FlexibleViewHolder
-import io.github.wulkanowy.R
-import io.github.wulkanowy.data.db.entities.Exam
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.item_exam.*
+data class ExamItem<out T>(val value: T, val viewType: ViewType) {
 
-class ExamItem(header: ExamHeader, val exam: Exam) : AbstractSectionableItem<ExamItem.ViewHolder, ExamHeader>(header) {
-
-    override fun getLayoutRes() = R.layout.item_exam
-
-    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>): ViewHolder {
-        return ViewHolder(view, adapter)
-    }
-
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
-        holder.run {
-            examItemSubject.text = exam.subject
-            examItemTeacher.text = exam.teacher
-            examItemType.text = exam.type
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as ExamItem
-
-        if (exam != other.exam) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        var result = exam.hashCode()
-        result = 31 * result + exam.id.toInt()
-        return result
-    }
-
-    class ViewHolder(view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter), LayoutContainer {
-        override val containerView: View
-            get() = contentView
+    enum class ViewType(val id: Int) {
+        HEADER(1),
+        ITEM(2)
     }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamPresenter.kt

@@ -1,6 +1,5 @@
 package io.github.wulkanowy.ui.modules.exam
 
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.db.entities.Exam
 import io.github.wulkanowy.data.repositories.exam.ExamRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
@@ -19,7 +18,6 @@ import org.threeten.bp.LocalDate
 import org.threeten.bp.LocalDate.now
 import org.threeten.bp.LocalDate.ofEpochDay
 import timber.log.Timber
-import java.util.concurrent.TimeUnit.MILLISECONDS
 import javax.inject.Inject
 
 class ExamPresenter @Inject constructor(
@@ -75,11 +73,9 @@ class ExamPresenter @Inject constructor(
         view?.showErrorDetailsDialog(lastError)
     }
 
-    fun onExamItemSelected(item: AbstractFlexibleItem<*>?) {
-        if (item is ExamItem) {
-            Timber.i("Select exam item ${item.exam.id}")
-            view?.showExamDialog(item.exam)
-        }
+    fun onExamItemSelected(exam: Exam) {
+        Timber.i("Select exam item ${exam.id}")
+        view?.showExamDialog(exam)
     }
 
     fun onViewReselected() {
@@ -117,8 +113,6 @@ class ExamPresenter @Inject constructor(
                         examRepository.getExams(student, semester, currentDate.monday, currentDate.friday, forceRefresh)
                     }
                 }
-                .delay(200, MILLISECONDS)
-                .map { it.groupBy { exam -> exam.date }.toSortedMap() }
                 .map { createExamItems(it) }
                 .subscribeOn(schedulers.backgroundThread)
                 .observeOn(schedulers.mainThread)
@@ -156,12 +150,12 @@ class ExamPresenter @Inject constructor(
         }
     }
 
-    private fun createExamItems(items: Map<LocalDate, List<Exam>>): List<ExamItem> {
-        return items.flatMap {
-            ExamHeader(it.key).let { header ->
-                it.value.reversed().map { item -> ExamItem(header, item) }
+    private fun createExamItems(items: List<Exam>): List<ExamItem<*>> {
+        return items.groupBy { it.date }.toSortedMap().map { (date, exams) ->
+            listOf(ExamItem(date, ExamItem.ViewType.HEADER)) + exams.reversed().map { exam ->
+                ExamItem(exam, ExamItem.ViewType.ITEM)
             }
-        }
+        }.flatten()
     }
 
     private fun reloadView() {

app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamView.kt

@@ -9,7 +9,7 @@ interface ExamView : BaseView {
 
     fun initView()
 
-    fun updateData(data: List<ExamItem>)
+    fun updateData(data: List<ExamItem<*>>)
 
     fun updateNavigationWeek(date: String)
 

app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeAverageProvider.kt

@@ -3,71 +3,76 @@ package io.github.wulkanowy.ui.modules.grade
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.repositories.grade.GradeRepository
-import io.github.wulkanowy.data.repositories.gradessummary.GradeSummaryRepository
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
+import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.sdk.Sdk
 import io.github.wulkanowy.utils.calcAverage
 import io.github.wulkanowy.utils.changeModifier
-import io.reactivex.Maybe
 import io.reactivex.Single
 import javax.inject.Inject
 
 class GradeAverageProvider @Inject constructor(
-    private val preferencesRepository: PreferencesRepository,
+    private val semesterRepository: SemesterRepository,
     private val gradeRepository: GradeRepository,
-    private val gradeSummaryRepository: GradeSummaryRepository
+    private val preferencesRepository: PreferencesRepository
 ) {
 
     private val plusModifier = preferencesRepository.gradePlusModifier
 
     private val minusModifier = preferencesRepository.gradeMinusModifier
 
-    fun getGradeAverage(student: Student, semesters: List<Semester>, selectedSemesterId: Int, forceRefresh: Boolean): Single<List<Triple<String, Double, String>>> {
-        return when (preferencesRepository.gradeAverageMode) {
-            "all_year" -> getAllYearAverage(student, semesters, selectedSemesterId, forceRefresh)
-            "only_one_semester" -> getOnlyOneSemesterAverage(student, semesters, selectedSemesterId, forceRefresh)
-            else -> throw IllegalArgumentException("Incorrect grade average mode: ${preferencesRepository.gradeAverageMode} ")
+    fun getGradesDetailsWithAverage(student: Student, semesterId: Int, forceRefresh: Boolean = false): Single<List<GradeDetailsWithAverage>> {
+        return semesterRepository.getSemesters(student).flatMap { semesters ->
+            when (preferencesRepository.gradeAverageMode) {
+                "only_one_semester" -> getSemesterDetailsWithAverage(student, semesters.single { it.semesterId == semesterId }, forceRefresh)
+                "all_year" -> calculateWholeYearAverage(student, semesters, semesterId, forceRefresh)
+                else -> throw IllegalArgumentException("Incorrect grade average mode: ${preferencesRepository.gradeAverageMode} ")
+            }
         }
     }
 
-    private fun getAllYearAverage(student: Student, semesters: List<Semester>, semesterId: Int, forceRefresh: Boolean): Single<List<Triple<String, Double, String>>> {
+    private fun calculateWholeYearAverage(student: Student, semesters: List<Semester>, semesterId: Int, forceRefresh: Boolean): Single<List<GradeDetailsWithAverage>> {
         val selectedSemester = semesters.single { it.semesterId == semesterId }
         val firstSemester = semesters.single { it.diaryId == selectedSemester.diaryId && it.semesterName == 1 }
 
-        return getAverageFromGradeSummary(student, selectedSemester, forceRefresh)
-            .switchIfEmpty(gradeRepository.getGrades(student, selectedSemester, forceRefresh)
-                .flatMap { firstGrades ->
-                    if (selectedSemester == firstSemester) Single.just(firstGrades)
-                    else {
-                        gradeRepository.getGrades(student, firstSemester)
-                            .map { secondGrades -> secondGrades + firstGrades }
+        return getSemesterDetailsWithAverage(student, selectedSemester, forceRefresh).flatMap { selectedDetails ->
+            val isAnyAverage = selectedDetails.any { it.average != .0 }
+
+            if (selectedSemester != firstSemester) {
+                getSemesterDetailsWithAverage(student, firstSemester, forceRefresh).map { secondDetails ->
+                    selectedDetails.map { selected ->
+                        val second = secondDetails.singleOrNull { it.subject == selected.subject }
+                        selected.copy(
+                            average = if (!isAnyAverage || preferencesRepository.gradeAverageForceCalc) {
+                                (selected.grades + second?.grades.orEmpty()).calcAverage()
+                            } else (selected.average + (second?.average ?: selected.average)) / 2
+                        )
                     }
-                }.map { grades ->
-                    grades.map { if (student.loginMode == Sdk.Mode.SCRAPPER.name) it.changeModifier(plusModifier, minusModifier) else it }
-                        .groupBy { it.subject }
-                        .map { Triple(it.key, it.value.calcAverage(), "") }
-                })
+                }
+            } else Single.just(selectedDetails)
+        }
     }
 
-    private fun getOnlyOneSemesterAverage(student: Student, semesters: List<Semester>, semesterId: Int, forceRefresh: Boolean): Single<List<Triple<String, Double, String>>> {
-        val selectedSemester = semesters.single { it.semesterId == semesterId }
+    private fun getSemesterDetailsWithAverage(student: Student, semester: Semester, forceRefresh: Boolean): Single<List<GradeDetailsWithAverage>> {
+        return gradeRepository.getGrades(student, semester, forceRefresh).map { (details, summaries) ->
+            val isAnyAverage = summaries.any { it.average != .0 }
+            val allGrades = details.groupBy { it.subject }
 
-        return getAverageFromGradeSummary(student, selectedSemester, forceRefresh)
-            .switchIfEmpty(gradeRepository.getGrades(student, selectedSemester, forceRefresh)
-                .map { grades ->
-                    grades.map { if (student.loginMode == Sdk.Mode.SCRAPPER.name) it.changeModifier(plusModifier, minusModifier) else it }
-                        .groupBy { it.subject }
-                        .map { Triple(it.key, it.value.calcAverage(), "") }
-                })
-    }
-
-    private fun getAverageFromGradeSummary(student: Student, selectedSemester: Semester, forceRefresh: Boolean): Maybe<List<Triple<String, Double, String>>> {
-        return gradeSummaryRepository.getGradesSummary(student, selectedSemester, forceRefresh)
-            .toMaybe()
-            .flatMap {
-                if (it.any { summary -> summary.average != .0 }) {
-                    Maybe.just(it.map { summary -> Triple(summary.subject, summary.average, summary.pointsSum) })
-                } else Maybe.empty()
-            }.filter { !preferencesRepository.gradeAverageForceCalc }
+            summaries.map { summary ->
+                val grades = allGrades[summary.subject].orEmpty()
+                GradeDetailsWithAverage(
+                    subject = summary.subject,
+                    average = if (!isAnyAverage || preferencesRepository.gradeAverageForceCalc) {
+                        grades.map {
+                            if (student.loginMode == Sdk.Mode.SCRAPPER.name) it.changeModifier(plusModifier, minusModifier)
+                            else it
+                        }.calcAverage()
+                    } else summary.average,
+                    points = summary.pointsSum,
+                    summary = summary,
+                    grades = grades
+                )
+            }
+        }
     }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeDetailsWithAverage.kt

@@ -0,0 +1,12 @@
+package io.github.wulkanowy.ui.modules.grade
+
+import io.github.wulkanowy.data.db.entities.Grade
+import io.github.wulkanowy.data.db.entities.GradeSummary
+
+data class GradeDetailsWithAverage(
+    val subject: String,
+    val average: Double,
+    val points: String,
+    val summary: GradeSummary,
+    val grades: List<Grade>
+)

app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeFragment.kt

@@ -1,16 +1,15 @@
 package io.github.wulkanowy.ui.modules.grade
 
 import android.os.Bundle
-import android.view.LayoutInflater
 import android.view.Menu
 import android.view.MenuInflater
 import android.view.MenuItem
 import android.view.View
 import android.view.View.INVISIBLE
 import android.view.View.VISIBLE
-import android.view.ViewGroup
 import androidx.appcompat.app.AlertDialog
 import io.github.wulkanowy.R
+import io.github.wulkanowy.databinding.FragmentGradeBinding
 import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.base.BaseFragmentPagerAdapter
 import io.github.wulkanowy.ui.modules.grade.details.GradeDetailsFragment
@@ -19,10 +18,9 @@ import io.github.wulkanowy.ui.modules.grade.summary.GradeSummaryFragment
 import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.setOnSelectPageListener
-import kotlinx.android.synthetic.main.fragment_grade.*
 import javax.inject.Inject
 
-class GradeFragment : BaseFragment(), GradeView, MainView.MainChildView, MainView.TitledView {
+class GradeFragment : BaseFragment<FragmentGradeBinding>(R.layout.fragment_grade), GradeView, MainView.MainChildView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: GradePresenter
@@ -42,19 +40,16 @@ class GradeFragment : BaseFragment(), GradeView, MainView.MainChildView, MainVie
 
     override var subtitleString = ""
 
-    override val currentPageIndex get() = gradeViewPager.currentItem
+    override val currentPageIndex get() = binding.gradeViewPager.currentItem
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setHasOptionsMenu(true)
     }
 
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.fragment_grade, container, false)
-    }
-
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding = FragmentGradeBinding.bind(view)
         presenter.onAttachView(this, savedInstanceState?.getInt(SAVED_SEMESTER_KEY))
     }
 
@@ -66,7 +61,7 @@ class GradeFragment : BaseFragment(), GradeView, MainView.MainChildView, MainVie
 
     override fun initView() {
         with(pagerAdapter) {
-            containerId = gradeViewPager.id
+            containerId = binding.gradeViewPager.id
             addFragmentsWithTitle(mapOf(
                 GradeDetailsFragment.newInstance() to getString(R.string.all_details),
                 GradeSummaryFragment.newInstance() to getString(R.string.grade_menu_summary),
@@ -74,19 +69,21 @@ class GradeFragment : BaseFragment(), GradeView, MainView.MainChildView, MainVie
             ))
         }
 
-        with(gradeViewPager) {
+        with(binding.gradeViewPager) {
             adapter = pagerAdapter
             offscreenPageLimit = 3
             setOnSelectPageListener(presenter::onPageSelected)
         }
 
-        with(gradeTabLayout) {
-            setupWithViewPager(gradeViewPager)
+        with(binding.gradeTabLayout) {
+            setupWithViewPager(binding.gradeViewPager)
             setElevationCompat(context.dpToPx(4f))
         }
 
-        gradeErrorRetry.setOnClickListener { presenter.onRetry() }
-        gradeErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+        with(binding) {
+            gradeErrorRetry.setOnClickListener { presenter.onRetry() }
+            gradeErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+        }
     }
 
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
@@ -99,20 +96,22 @@ class GradeFragment : BaseFragment(), GradeView, MainView.MainChildView, MainVie
     }
 
     override fun showContent(show: Boolean) {
-        gradeViewPager.visibility = if (show) VISIBLE else INVISIBLE
-        gradeTabLayout.visibility = if (show) VISIBLE else INVISIBLE
+        with(binding) {
+            gradeViewPager.visibility = if (show) VISIBLE else INVISIBLE
+            gradeTabLayout.visibility = if (show) VISIBLE else INVISIBLE
+        }
     }
 
     override fun showProgress(show: Boolean) {
-        gradeProgress.visibility = if (show) VISIBLE else INVISIBLE
+        binding.gradeProgress.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun showErrorView(show: Boolean) {
-        gradeError.visibility = if (show) VISIBLE else INVISIBLE
+        binding.gradeError.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun setErrorDetails(message: String) {
-        gradeErrorMessage.text = message
+        binding.gradeErrorMessage.text = message
     }
 
     override fun showSemesterSwitch(show: Boolean) {
@@ -166,7 +165,7 @@ class GradeFragment : BaseFragment(), GradeView, MainView.MainChildView, MainVie
     }
 
     override fun onDestroyView() {
-        super.onDestroyView()
         presenter.onDetachView()
+        super.onDestroyView()
     }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsAdapter.kt

@@ -0,0 +1,176 @@
+package io.github.wulkanowy.ui.modules.grade.details
+
+import android.annotation.SuppressLint
+import android.content.res.Resources
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.RecyclerView
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.Grade
+import io.github.wulkanowy.databinding.HeaderGradeDetailsBinding
+import io.github.wulkanowy.databinding.ItemGradeDetailsBinding
+import io.github.wulkanowy.ui.base.BaseExpandableAdapter
+import io.github.wulkanowy.utils.getBackgroundColor
+import io.github.wulkanowy.utils.toFormattedString
+import javax.inject.Inject
+
+class GradeDetailsAdapter @Inject constructor() : BaseExpandableAdapter<RecyclerView.ViewHolder>() {
+
+    private var headers = mutableListOf<GradeDetailsItem>()
+
+    private var items = mutableListOf<GradeDetailsItem>()
+
+    private var expandedPosition = RecyclerView.NO_POSITION
+
+    private var isExpandable = false
+
+    var onClickListener: (Grade, position: Int) -> Unit = { _, _ -> }
+
+    var colorTheme = ""
+
+    fun setDataItems(data: List<GradeDetailsItem>, isExpanded: Boolean = isExpandable) {
+        headers = data.filter { it.viewType == ViewType.HEADER }.toMutableList()
+        items = if (isExpanded) headers else data.toMutableList()
+        isExpandable = isExpanded
+        expandedPosition = RecyclerView.NO_POSITION
+    }
+
+    fun updateDetailsItem(position: Int, grade: Grade) {
+        items[position] = GradeDetailsItem(grade, ViewType.ITEM)
+        notifyItemChanged(position)
+    }
+
+    fun getHeaderItem(subject: String): GradeDetailsItem {
+        return headers.single { (it.value as GradeDetailsHeader).subject == subject }
+    }
+
+    fun updateHeaderItem(item: GradeDetailsItem) {
+        headers[headers.indexOf(item)] = item
+        items[items.indexOf(item)] = item
+        notifyItemChanged(items.indexOf(item))
+    }
+
+    fun collapseAll() {
+        if (expandedPosition != -1) {
+            refreshList(headers)
+            expandedPosition = RecyclerView.NO_POSITION
+        }
+    }
+
+    @Synchronized
+    private fun refreshList(newItems: List<GradeDetailsItem>) {
+        val diffCallback = GradeDetailsDiffUtil(items, newItems)
+        val diffResult = DiffUtil.calculateDiff(diffCallback)
+        items = newItems.toMutableList()
+        diffResult.dispatchUpdatesTo(this)
+    }
+
+    override fun getItemCount() = items.size
+
+    override fun getItemViewType(position: Int) = items[position].viewType.id
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
+        val inflater = LayoutInflater.from(parent.context)
+
+        return when (viewType) {
+            ViewType.HEADER.id -> HeaderViewHolder(HeaderGradeDetailsBinding.inflate(inflater, parent, false))
+            ViewType.ITEM.id -> ItemViewHolder(ItemGradeDetailsBinding.inflate(inflater, parent, false))
+            else -> throw IllegalStateException()
+        }
+    }
+
+    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
+        when (holder) {
+            is HeaderViewHolder -> bindHeaderViewHolder(
+                binding = holder.binding,
+                header = items[position].value as GradeDetailsHeader,
+                headerPosition = headers.indexOf(items[position]),
+                adapterPosition = position
+            )
+            is ItemViewHolder -> bindItemViewHolder(
+                binding = holder.binding,
+                grade = items[position].value as Grade,
+                position = position
+            )
+        }
+    }
+
+    private fun bindHeaderViewHolder(binding: HeaderGradeDetailsBinding, header: GradeDetailsHeader, headerPosition: Int, adapterPosition: Int) {
+        with(binding) {
+            gradeHeaderDivider.visibility = if (adapterPosition == 0) View.GONE else View.VISIBLE
+            gradeHeaderSubject.apply {
+                text = header.subject
+                maxLines = if (headerPosition == expandedPosition) 2 else 1
+            }
+            gradeHeaderAverage.text = formatAverage(header.average, root.context.resources)
+            gradeHeaderPointsSum.text = root.context.getString(R.string.grade_points_sum, header.pointsSum)
+            gradeHeaderPointsSum.visibility = if (!header.pointsSum.isNullOrEmpty()) View.VISIBLE else View.GONE
+            gradeHeaderNumber.text = root.context.resources.getQuantityString(R.plurals.grade_number_item, header.grades.size, header.grades.size)
+            gradeHeaderNote.visibility = if (header.newGrades > 0) View.VISIBLE else View.GONE
+            if (header.newGrades > 0) gradeHeaderNote.text = header.newGrades.toString(10)
+
+            gradeHeaderContainer.isEnabled = isExpandable
+            gradeHeaderContainer.setOnClickListener {
+                expandedPosition = if (expandedPosition == adapterPosition) -1 else adapterPosition
+
+                if (expandedPosition != RecyclerView.NO_POSITION) {
+                    refreshList(headers.toMutableList().apply {
+                        addAll(headerPosition + 1, header.grades)
+                    })
+                    scrollToHeaderWithSubItems(headerPosition, header.grades.size)
+                } else {
+                    refreshList(headers)
+                }
+            }
+        }
+    }
+
+    private fun formatAverage(average: Double?, resources: Resources): String {
+        return if (average == null || average == .0) resources.getString(R.string.grade_no_average)
+        else resources.getString(R.string.grade_average, average)
+    }
+
+    @SuppressLint("SetTextI18n")
+    private fun bindItemViewHolder(binding: ItemGradeDetailsBinding, grade: Grade, position: Int) {
+        with(binding) {
+            gradeItemValue.run {
+                text = grade.entry
+                setBackgroundResource(grade.getBackgroundColor(colorTheme))
+            }
+            gradeItemDescription.text = when {
+                grade.description.isNotBlank() -> grade.description
+                grade.gradeSymbol.isNotBlank() -> grade.gradeSymbol
+                else -> root.context.getString(R.string.all_no_description)
+            }
+            gradeItemDate.text = grade.date.toFormattedString()
+            gradeItemWeight.text = "${root.context.getString(R.string.grade_weight)}: ${grade.weight}"
+            gradeItemNote.visibility = if (!grade.isRead) View.VISIBLE else View.GONE
+
+            root.setOnClickListener { onClickListener(grade, position) }
+        }
+    }
+
+    private class HeaderViewHolder(val binding: HeaderGradeDetailsBinding) :
+        RecyclerView.ViewHolder(binding.root)
+
+    private class ItemViewHolder(val binding: ItemGradeDetailsBinding) :
+        RecyclerView.ViewHolder(binding.root)
+
+    class GradeDetailsDiffUtil(private val old: List<GradeDetailsItem>, private val new: List<GradeDetailsItem>) :
+        DiffUtil.Callback() {
+
+        override fun getOldListSize() = old.size
+
+        override fun getNewListSize() = new.size
+
+        override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
+            return old[oldItemPosition] == new[newItemPosition]
+        }
+
+        override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
+            return old[oldItemPosition] == new[newItemPosition]
+        }
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsDialog.kt

@@ -8,14 +8,17 @@ import android.view.ViewGroup
 import androidx.fragment.app.DialogFragment
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Grade
+import io.github.wulkanowy.databinding.DialogGradeBinding
 import io.github.wulkanowy.utils.colorStringId
 import io.github.wulkanowy.utils.getBackgroundColor
 import io.github.wulkanowy.utils.getGradeColor
+import io.github.wulkanowy.utils.lifecycleAwareVariable
 import io.github.wulkanowy.utils.toFormattedString
-import kotlinx.android.synthetic.main.dialog_grade.*
 
 class GradeDetailsDialog : DialogFragment() {
 
+    private var binding: DialogGradeBinding by lifecycleAwareVariable()
+
     private lateinit var grade: Grade
 
     private lateinit var colorScheme: String
@@ -44,47 +47,49 @@ class GradeDetailsDialog : DialogFragment() {
     }
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.dialog_grade, container, false)
+        return DialogGradeBinding.inflate(inflater).apply { binding = this }.root
     }
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
 
-        gradeDialogSubject.text = grade.subject
+        with(binding) {
+            gradeDialogSubject.text = grade.subject
 
-        gradeDialogColorAndWeightValue.run {
-            text = context.getString(R.string.grade_weight_value, grade.weight)
-            setBackgroundResource(grade.getGradeColor())
-        }
-
-        gradeDialogDateValue.text = grade.date.toFormattedString()
-        gradeDialogColorValue.text = getString(grade.colorStringId)
-
-        gradeDialogCommentValue.apply {
-            if (grade.comment.isBlank()) {
-                visibility = GONE
-                gradeDialogComment.visibility = GONE
-            } else text = grade.comment
-        }
-
-        gradeDialogValue.run {
-            text = grade.entry
-            setBackgroundResource(grade.getBackgroundColor(colorScheme))
-        }
-
-        gradeDialogTeacherValue.text = if (grade.teacher.isBlank()) {
-            getString(R.string.all_no_data)
-        } else grade.teacher
-
-        gradeDialogDescriptionValue.text = grade.run {
-            when {
-                description.isBlank() && gradeSymbol.isNotBlank() -> gradeSymbol
-                description.isBlank() && gradeSymbol.isBlank() -> getString(R.string.all_no_description)
-                gradeSymbol.isNotBlank() && description.isNotBlank() -> "$gradeSymbol - $description"
-                else -> description
+            gradeDialogColorAndWeightValue.run {
+                text = context.getString(R.string.grade_weight_value, grade.weight)
+                setBackgroundResource(grade.getGradeColor())
             }
-        }
 
-        gradeDialogClose.setOnClickListener { dismiss() }
+            gradeDialogDateValue.text = grade.date.toFormattedString()
+            gradeDialogColorValue.text = getString(grade.colorStringId)
+
+            gradeDialogCommentValue.apply {
+                if (grade.comment.isBlank()) {
+                    visibility = GONE
+                    gradeDialogComment.visibility = GONE
+                } else text = grade.comment
+            }
+
+            gradeDialogValue.run {
+                text = grade.entry
+                setBackgroundResource(grade.getBackgroundColor(colorScheme))
+            }
+
+            gradeDialogTeacherValue.text = if (grade.teacher.isBlank()) {
+                getString(R.string.all_no_data)
+            } else grade.teacher
+
+            gradeDialogDescriptionValue.text = grade.run {
+                when {
+                    description.isBlank() && gradeSymbol.isNotBlank() -> gradeSymbol
+                    description.isBlank() && gradeSymbol.isBlank() -> getString(R.string.all_no_description)
+                    gradeSymbol.isNotBlank() && description.isNotBlank() -> "$gradeSymbol - $description"
+                    else -> description
+                }
+            }
+
+            gradeDialogClose.setOnClickListener { dismiss() }
+        }
     }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsFragment.kt

@@ -1,7 +1,6 @@
 package io.github.wulkanowy.ui.modules.grade.details
 
 import android.os.Bundle
-import android.view.LayoutInflater
 import android.view.Menu
 import android.view.MenuInflater
 import android.view.MenuItem
@@ -9,29 +8,25 @@ import android.view.View
 import android.view.View.GONE
 import android.view.View.INVISIBLE
 import android.view.View.VISIBLE
-import android.view.ViewGroup
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import eu.davidea.flexibleadapter.items.IExpandable
-import eu.davidea.flexibleadapter.items.IFlexible
+import androidx.recyclerview.widget.LinearLayoutManager
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Grade
+import io.github.wulkanowy.databinding.FragmentGradeDetailsBinding
 import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.grade.GradeFragment
 import io.github.wulkanowy.ui.modules.grade.GradeView
 import io.github.wulkanowy.ui.modules.main.MainActivity
-import io.github.wulkanowy.utils.setOnItemClickListener
-import kotlinx.android.synthetic.main.fragment_grade_details.*
 import javax.inject.Inject
 
-class GradeDetailsFragment : BaseFragment(), GradeDetailsView, GradeView.GradeChildView {
+class GradeDetailsFragment :
+    BaseFragment<FragmentGradeDetailsBinding>(R.layout.fragment_grade_details), GradeDetailsView,
+    GradeView.GradeChildView {
 
     @Inject
     lateinit var presenter: GradeDetailsPresenter
 
     @Inject
-    lateinit var gradeDetailsAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+    lateinit var gradeDetailsAdapter: GradeDetailsAdapter
 
     private var gradeDetailsMenu: Menu? = null
 
@@ -39,36 +34,18 @@ class GradeDetailsFragment : BaseFragment(), GradeDetailsView, GradeView.GradeCh
         fun newInstance() = GradeDetailsFragment()
     }
 
-    override val emptyAverageString: String
-        get() = getString(R.string.grade_no_average)
-
-    override val averageString: String
-        get() = getString(R.string.grade_average)
-
-    override val pointsSumString: String
-        get() = getString(R.string.grade_points_sum)
-
-    override val weightString: String
-        get() = getString(R.string.grade_weight)
-
-    override val noDescriptionString: String
-        get() = getString(R.string.all_no_description)
-
     override val isViewEmpty
-        get() = gradeDetailsAdapter.isEmpty
+        get() = gradeDetailsAdapter.itemCount == 0
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setHasOptionsMenu(true)
     }
 
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.fragment_grade_details, container, false)
-    }
-
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
-        messageContainer = gradeDetailsRecycler
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding = FragmentGradeDetailsBinding.bind(view)
+        messageContainer = binding.gradeDetailsRecycler
         presenter.onAttachView(this)
     }
 
@@ -79,22 +56,17 @@ class GradeDetailsFragment : BaseFragment(), GradeDetailsView, GradeView.GradeCh
     }
 
     override fun initView() {
-        gradeDetailsAdapter.run {
-            isAutoCollapseOnExpand = true
-            isAutoScrollOnExpand = true
-            setOnItemClickListener { presenter.onGradeItemSelected(it) }
-        }
+        gradeDetailsAdapter.onClickListener = presenter::onGradeItemSelected
 
-        gradeDetailsRecycler.run {
-            layoutManager = SmoothScrollLinearLayoutManager(context)
-            adapter = gradeDetailsAdapter
-            addItemDecoration(GradeDetailsHeaderItemDecoration(context)
-                .withDefaultDivider(R.layout.header_grade_details)
-            )
+        with(binding) {
+            with(gradeDetailsRecycler) {
+                layoutManager = LinearLayoutManager(context)
+                adapter = gradeDetailsAdapter
+            }
+            gradeDetailsSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+            gradeDetailsErrorRetry.setOnClickListener { presenter.onRetry() }
+            gradeDetailsErrorDetails.setOnClickListener { presenter.onDetailsClick() }
         }
-        gradeDetailsSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
-        gradeDetailsErrorRetry.setOnClickListener { presenter.onRetry() }
-        gradeDetailsErrorDetails.setOnClickListener { presenter.onDetailsClick() }
     }
 
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
@@ -102,16 +74,23 @@ class GradeDetailsFragment : BaseFragment(), GradeDetailsView, GradeView.GradeCh
         else false
     }
 
-    override fun updateData(data: List<GradeDetailsHeader>) {
-        gradeDetailsAdapter.updateDataSet(data, true)
+    override fun updateData(data: List<GradeDetailsItem>, isGradeExpandable: Boolean, gradeColorTheme: String) {
+        with(gradeDetailsAdapter) {
+            colorTheme = gradeColorTheme
+            setDataItems(data, isGradeExpandable)
+            notifyDataSetChanged()
+        }
     }
 
-    override fun updateItem(item: AbstractFlexibleItem<*>) {
-        gradeDetailsAdapter.updateItem(item)
+    override fun updateItem(item: Grade, position: Int) {
+        gradeDetailsAdapter.updateDetailsItem(position, item)
     }
 
     override fun clearView() {
-        gradeDetailsAdapter.clear()
+        with(gradeDetailsAdapter) {
+            setDataItems(mutableListOf())
+            notifyDataSetChanged()
+        }
     }
 
     override fun collapseAllItems() {
@@ -119,43 +98,43 @@ class GradeDetailsFragment : BaseFragment(), GradeDetailsView, GradeView.GradeCh
     }
 
     override fun scrollToStart() {
-        gradeDetailsRecycler.scrollToPosition(0)
+        binding.gradeDetailsRecycler.smoothScrollToPosition(0)
     }
 
-    override fun getHeaderOfItem(item: AbstractFlexibleItem<*>): IExpandable<*, out IFlexible<*>>? {
-        return gradeDetailsAdapter.getExpandableOf(item)
+    override fun getHeaderOfItem(subject: String): GradeDetailsItem {
+        return gradeDetailsAdapter.getHeaderItem(subject)
     }
 
-    override fun getGradeNumberString(number: Int): String {
-        return resources.getQuantityString(R.plurals.grade_number_item, number, number)
+    override fun updateHeaderItem(item: GradeDetailsItem) {
+        gradeDetailsAdapter.updateHeaderItem(item)
     }
 
     override fun showProgress(show: Boolean) {
-        gradeDetailsProgress.visibility = if (show) VISIBLE else GONE
+        binding.gradeDetailsProgress.visibility = if (show) VISIBLE else GONE
     }
 
     override fun enableSwipe(enable: Boolean) {
-        gradeDetailsSwipe.isEnabled = enable
+        binding.gradeDetailsSwipe.isEnabled = enable
     }
 
     override fun showContent(show: Boolean) {
-        gradeDetailsRecycler.visibility = if (show) VISIBLE else INVISIBLE
+        binding.gradeDetailsRecycler.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun showEmpty(show: Boolean) {
-        gradeDetailsEmpty.visibility = if (show) VISIBLE else INVISIBLE
+        binding.gradeDetailsEmpty.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun showErrorView(show: Boolean) {
-        gradeDetailsError.visibility = if (show) VISIBLE else GONE
+        binding.gradeDetailsError.visibility = if (show) VISIBLE else GONE
     }
 
     override fun setErrorDetails(message: String) {
-        gradeDetailsErrorMessage.text = message
+        binding.gradeDetailsErrorMessage.text = message
     }
 
     override fun showRefresh(show: Boolean) {
-        gradeDetailsSwipe.isRefreshing = show
+        binding.gradeDetailsSwipe.isRefreshing = show
     }
 
     override fun showGradeDialog(grade: Grade, colorScheme: String) {
@@ -187,7 +166,7 @@ class GradeDetailsFragment : BaseFragment(), GradeDetailsView, GradeView.GradeCh
     }
 
     override fun onDestroyView() {
-        super.onDestroyView()
         presenter.onDetachView()
+        super.onDestroyView()
     }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsHeader.kt

@@ -1,94 +0,0 @@
-package io.github.wulkanowy.ui.modules.grade.details
-
-import android.view.View
-import android.view.View.GONE
-import android.view.View.VISIBLE
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractExpandableItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.ExpandableViewHolder
-import io.github.wulkanowy.R
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.header_grade_details.*
-
-class GradeDetailsHeader(
-    private val subject: String,
-    private val number: String,
-    private val average: String,
-    private val pointsSum: String,
-    var newGrades: Int,
-    private val isExpandable: Boolean
-) : AbstractExpandableItem<GradeDetailsHeader.ViewHolder, GradeDetailsItem>() {
-
-    init {
-        isExpanded = !isExpandable
-    }
-
-    override fun getLayoutRes() = R.layout.header_grade_details
-
-    override fun createViewHolder(view: View?, adapter: FlexibleAdapter<IFlexible<*>>?): ViewHolder {
-        return ViewHolder(view, adapter)
-    }
-
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>?, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
-        holder.run {
-            gradeHeaderSubject.apply {
-                text = subject
-                maxLines = if (isExpanded) 2 else 1
-            }
-            gradeHeaderAverage.text = average
-            gradeHeaderPointsSum.text = pointsSum
-            gradeHeaderPointsSum.visibility = if (pointsSum.isNotEmpty()) VISIBLE else GONE
-            gradeHeaderNumber.text = number
-            gradeHeaderNote.visibility = if (newGrades > 0) VISIBLE else GONE
-            if (newGrades > 0) gradeHeaderNote.text = newGrades.toString(10)
-            gradeHeaderContainer.isEnabled = isExpandable
-
-            isViewExpandable = isExpandable
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as GradeDetailsHeader
-
-        if (subject != other.subject) return false
-        if (number != other.number) return false
-        if (average != other.average) return false
-        if (isExpandable != other.isExpandable) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        var result = subject.hashCode()
-        result = 31 * result + number.hashCode()
-        result = 31 * result + average.hashCode()
-        result = 31 * result + isExpandable.hashCode()
-        return result
-    }
-
-    class ViewHolder(view: View?, adapter: FlexibleAdapter<IFlexible<*>>?) :
-        ExpandableViewHolder(view, adapter), LayoutContainer {
-
-        var isViewExpandable = true
-
-        init {
-            contentView.setOnClickListener(this)
-        }
-
-        override val containerView: View
-            get() = contentView
-
-        override fun isViewCollapsibleOnClick() = isViewExpandable
-
-        override fun isViewExpandableOnClick() = isViewExpandable
-
-        override fun onClick(view: View?) {
-            super.onClick(view)
-            mAdapter.getItem(adapterPosition)?.let { mAdapter.updateItem(it) }
-        }
-    }
-}

app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsHeaderItemDecoration.kt

@@ -1,38 +0,0 @@
-package io.github.wulkanowy.ui.modules.grade.details
-
-import android.content.Context
-import android.graphics.Canvas
-import androidx.recyclerview.widget.RecyclerView
-import eu.davidea.flexibleadapter.common.FlexibleItemDecoration
-
-class GradeDetailsHeaderItemDecoration(context: Context) : FlexibleItemDecoration(context) {
-
-    override fun drawVertical(canvas: Canvas, parent: RecyclerView) {
-        canvas.save()
-        val left: Int
-        val right: Int
-        if (parent.clipToPadding) {
-            left = parent.paddingLeft
-            right = parent.width - parent.paddingRight
-            canvas.clipRect(left, parent.paddingTop, right,
-                parent.height - parent.paddingBottom)
-        } else {
-            left = 0
-            right = parent.width
-        }
-
-        val itemCount = parent.childCount
-        for (i in 1 until itemCount) {
-            val child = parent.getChildAt(i)
-            val viewHolder = parent.getChildViewHolder(child)
-            if (shouldDrawDivider(viewHolder)) {
-                parent.getDecoratedBoundsWithMargins(child, mBounds)
-                val bottom = mBounds.top + Math.round(child.translationY)
-                val top = bottom - mDivider.intrinsicHeight
-                mDivider.setBounds(left, top, right, bottom)
-                mDivider.draw(canvas)
-            }
-        }
-        canvas.restore()
-    }
-}

app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsItem.kt

@@ -1,74 +1,19 @@
 package io.github.wulkanowy.ui.modules.grade.details
 
-import android.annotation.SuppressLint
-import android.view.View
-import android.view.View.GONE
-import android.view.View.VISIBLE
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.FlexibleViewHolder
-import io.github.wulkanowy.R
-import io.github.wulkanowy.data.db.entities.Grade
-import io.github.wulkanowy.utils.toFormattedString
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.item_grade_details.*
-
-class GradeDetailsItem(
-    val grade: Grade,
-    private val valueBgColor: Int,
-    private val weightString: String,
-    private val noDescriptionString: String
-) : AbstractFlexibleItem<GradeDetailsItem.ViewHolder>() {
-
-    override fun getLayoutRes() = R.layout.item_grade_details
-
-    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>): ViewHolder {
-        return ViewHolder(view, adapter)
-    }
-
-    @SuppressLint("SetTextI18n")
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
-        holder.run {
-            gradeItemValue.run {
-                text = grade.entry
-                setBackgroundResource(valueBgColor)
-            }
-            gradeItemDescription.text = when {
-                grade.description.isNotBlank() -> grade.description
-                grade.gradeSymbol.isNotBlank() -> grade.gradeSymbol
-                else -> noDescriptionString
-            }
-            gradeItemDate.text = grade.date.toFormattedString()
-            gradeItemWeight.text = "$weightString: ${grade.weight}"
-            gradeItemNote.visibility = if (!grade.isRead) VISIBLE else GONE
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as GradeDetailsItem
-
-        if (grade != other.grade) return false
-        if (grade.id != other.grade.id) return false
-        if (weightString != other.weightString) return false
-        if (valueBgColor != other.valueBgColor) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        var result = grade.hashCode()
-        result = 31 * result + grade.id.toInt()
-        result = 31 * result + weightString.hashCode()
-        result = 31 * result + valueBgColor
-        return result
-    }
-
-    class ViewHolder(view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter), LayoutContainer {
-        override val containerView: View
-            get() = contentView
-    }
+enum class ViewType(val id: Int) {
+    HEADER(1),
+    ITEM(2)
 }
+
+data class GradeDetailsItem(
+    val value: Any,
+    val viewType: ViewType
+)
+
+data class GradeDetailsHeader(
+    val subject: String,
+    val average: Double?,
+    val pointsSum: String?,
+    var newGrades: Int,
+    val grades: List<GradeDetailsItem>
+)

app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsPresenter.kt

@@ -1,6 +1,5 @@
 package io.github.wulkanowy.ui.modules.grade.details
 
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.db.entities.Grade
 import io.github.wulkanowy.data.repositories.grade.GradeRepository
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
@@ -9,9 +8,9 @@ import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.ui.modules.grade.GradeAverageProvider
+import io.github.wulkanowy.ui.modules.grade.GradeDetailsWithAverage
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
-import io.github.wulkanowy.utils.getBackgroundColor
 import timber.log.Timber
 import javax.inject.Inject
 
@@ -43,24 +42,20 @@ class GradeDetailsPresenter @Inject constructor(
         loadData(semesterId, forceRefresh)
     }
 
-    fun onGradeItemSelected(item: AbstractFlexibleItem<*>?) {
-        if (item is GradeDetailsItem) {
-            Timber.i("Select grade item ${item.grade.id}")
-            view?.apply {
-                showGradeDialog(item.grade, preferencesRepository.gradeColorTheme)
-                if (!item.grade.isRead) {
-                    item.grade.isRead = true
-                    updateItem(item)
-                    getHeaderOfItem(item)?.let { header ->
-                        if (header is GradeDetailsHeader) {
-                            header.newGrades--
-                            updateItem(header)
-                        }
-                    }
-                    newGradesAmount--
-                    updateMarkAsDoneButton()
-                    updateGrade(item.grade)
+    fun onGradeItemSelected(grade: Grade, position: Int) {
+        Timber.i("Select grade item ${grade.id}")
+        view?.apply {
+            showGradeDialog(grade, preferencesRepository.gradeColorTheme)
+            if (!grade.isRead) {
+                grade.isRead = true
+                updateItem(grade, position)
+                getHeaderOfItem(grade.subject).let { header ->
+                    (header.value as GradeDetailsHeader).newGrades--
+                    updateHeaderItem(header)
                 }
+                newGradesAmount--
+                updateMarkAsDoneButton()
+                updateGrade(grade)
             }
         }
     }
@@ -132,16 +127,7 @@ class GradeDetailsPresenter @Inject constructor(
     private fun loadData(semesterId: Int, forceRefresh: Boolean) {
         Timber.i("Loading grade details data started")
         disposable.add(studentRepository.getCurrentStudent()
-            .flatMap { semesterRepository.getSemesters(it).map { semester -> it to semester } }
-            .flatMap { (student, semesters) ->
-                averageProvider.getGradeAverage(student, semesters, semesterId, forceRefresh)
-                    .flatMap { averages ->
-                        gradeRepository.getGrades(student, semesters.first { it.semesterId == semesterId }, forceRefresh)
-                            .map { it.sortedByDescending { grade -> grade.date } }
-                            .map { it.groupBy { grade -> grade.subject }.toSortedMap() }
-                            .map { createGradeItems(it, averages) }
-                    }
-            }
+            .flatMap { averageProvider.getGradesDetailsWithAverage(it, semesterId, forceRefresh) }
             .subscribeOn(schedulers.backgroundThread)
             .observeOn(schedulers.mainThread)
             .doFinally {
@@ -152,17 +138,21 @@ class GradeDetailsPresenter @Inject constructor(
                     notifyParentDataLoaded(semesterId)
                 }
             }
-            .subscribe({
+            .subscribe({ grades ->
                 Timber.i("Loading grade details result: Success")
-                newGradesAmount = it.sumBy { gradeDetailsHeader -> gradeDetailsHeader.newGrades }
+                newGradesAmount = grades.sumBy { it.grades.sumBy { grade -> if (!grade.isRead) 1 else 0 } }
                 updateMarkAsDoneButton()
                 view?.run {
-                    showEmpty(it.isEmpty())
+                    showEmpty(grades.isEmpty())
                     showErrorView(false)
-                    showContent(it.isNotEmpty())
-                    updateData(it)
+                    showContent(grades.isNotEmpty())
+                    updateData(
+                        data = createGradeItems(grades),
+                        isGradeExpandable = preferencesRepository.isGradeExpandable,
+                        gradeColorTheme = preferencesRepository.gradeColorTheme
+                    )
                 }
-                analytics.logEvent("load_grade_details", "items" to it.size, "force_refresh" to forceRefresh)
+                analytics.logEvent("load_grade_details", "items" to grades.size, "force_refresh" to forceRefresh)
             }) {
                 Timber.i("Loading grade details result: An exception occurred")
                 errorHandler.dispatch(it)
@@ -180,40 +170,20 @@ class GradeDetailsPresenter @Inject constructor(
         }
     }
 
-    private fun createGradeItems(items: Map<String, List<Grade>>, averages: List<Triple<String, Double, String>>): List<GradeDetailsHeader> {
-        val isGradeExpandable = preferencesRepository.isGradeExpandable
-        val gradeColorTheme = preferencesRepository.gradeColorTheme
-
-        val noDescriptionString = view?.noDescriptionString.orEmpty()
-        val weightString = view?.weightString.orEmpty()
-        val pointsSumString = view?.pointsSumString.orEmpty()
-
-        return items.map { subject ->
-            GradeDetailsHeader(
-                subject = subject.key,
-                average = formatAverage(averages.singleOrNull { subject.key == it.first }?.second),
-                pointsSum = averages.singleOrNull { subject.key == it.first }?.takeIf { it.third.isNotEmpty() }?.let { pointsSumString.format(it.third) }.orEmpty(),
-                number = view?.getGradeNumberString(subject.value.size).orEmpty(),
-                newGrades = subject.value.filter { grade -> !grade.isRead }.size,
-                isExpandable = isGradeExpandable
-            ).apply {
-                subItems = subject.value.map { item ->
-                    GradeDetailsItem(
-                        grade = item,
-                        valueBgColor = item.getBackgroundColor(gradeColorTheme),
-                        weightString = weightString,
-                        noDescriptionString = noDescriptionString
-                    )
-                }
+    private fun createGradeItems(items: List<GradeDetailsWithAverage>): List<GradeDetailsItem> {
+        return items.filter { it.grades.isNotEmpty() }.map { (subject, average, points, _, grades) ->
+            val subItems = grades.map {
+                GradeDetailsItem(it, ViewType.ITEM)
             }
-        }
-    }
 
-    private fun formatAverage(average: Double?): String {
-        return view?.run {
-            if (average == null || average == .0) emptyAverageString
-            else averageString.format(average)
-        }.orEmpty()
+            listOf(GradeDetailsItem(GradeDetailsHeader(
+                subject = subject,
+                average = average,
+                pointsSum = points,
+                newGrades = grades.filter { grade -> !grade.isRead }.size,
+                grades = subItems
+            ), ViewType.HEADER)) + if (preferencesRepository.isGradeExpandable) emptyList() else subItems
+        }.flatten()
     }
 
     private fun updateGrade(grade: Grade) {
@@ -221,8 +191,9 @@ class GradeDetailsPresenter @Inject constructor(
         disposable.add(gradeRepository.updateGrade(grade)
             .subscribeOn(schedulers.backgroundThread)
             .observeOn(schedulers.mainThread)
-            .subscribe({ Timber.i("Update grade result: Success") })
-            { error ->
+            .subscribe({
+                Timber.i("Update grade result: Success")
+            }) { error ->
                 Timber.i("Update grade result: An exception occurred")
                 errorHandler.dispatch(error)
             })

app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsView.kt

@@ -1,8 +1,5 @@
 package io.github.wulkanowy.ui.modules.grade.details
 
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import eu.davidea.flexibleadapter.items.IExpandable
-import eu.davidea.flexibleadapter.items.IFlexible
 import io.github.wulkanowy.data.db.entities.Grade
 import io.github.wulkanowy.ui.base.BaseView
 
@@ -10,21 +7,13 @@ interface GradeDetailsView : BaseView {
 
     val isViewEmpty: Boolean
 
-    val emptyAverageString: String
-
-    val averageString: String
-
-    val pointsSumString: String
-
-    val weightString: String
-
-    val noDescriptionString: String
-
     fun initView()
 
-    fun updateData(data: List<GradeDetailsHeader>)
+    fun updateData(data: List<GradeDetailsItem>, isGradeExpandable: Boolean, gradeColorTheme: String)
 
-    fun updateItem(item: AbstractFlexibleItem<*>)
+    fun updateItem(item: Grade, position: Int)
+
+    fun updateHeaderItem(item: GradeDetailsItem)
 
     fun clearView()
 
@@ -54,7 +43,5 @@ interface GradeDetailsView : BaseView {
 
     fun enableMarkAsDoneButton(enable: Boolean)
 
-    fun getGradeNumberString(number: Int): String
-
-    fun getHeaderOfItem(item: AbstractFlexibleItem<*>): IExpandable<*, out IFlexible<*>>?
+    fun getHeaderOfItem(subject: String): GradeDetailsItem
 }

app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsAdapter.kt

@@ -2,7 +2,6 @@ package io.github.wulkanowy.ui.modules.grade.statistics
 
 import android.graphics.Color
 import android.view.LayoutInflater
-import android.view.View
 import android.view.View.GONE
 import android.view.View.VISIBLE
 import android.view.ViewGroup
@@ -21,9 +20,9 @@ import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.GradePointsStatistics
 import io.github.wulkanowy.data.db.entities.GradeStatistics
 import io.github.wulkanowy.data.pojos.GradeStatisticsItem
+import io.github.wulkanowy.databinding.ItemGradeStatisticsBarBinding
+import io.github.wulkanowy.databinding.ItemGradeStatisticsPieBinding
 import io.github.wulkanowy.utils.getThemeAttrColor
-import kotlinx.android.synthetic.main.item_grade_statistics_bar.view.*
-import kotlinx.android.synthetic.main.item_grade_statistics_pie.view.*
 import javax.inject.Inject
 
 class GradeStatisticsAdapter @Inject constructor() :
@@ -33,6 +32,8 @@ class GradeStatisticsAdapter @Inject constructor() :
 
     var theme: String = "vulcan"
 
+    var showAllSubjectsOnList: Boolean = false
+
     private val vulcanGradeColors = listOf(
         6 to R.color.grade_vulcan_six,
         5 to R.color.grade_vulcan_five,
@@ -60,34 +61,30 @@ class GradeStatisticsAdapter @Inject constructor() :
         "6, 6-", "5, 5-, 5+", "4, 4-, 4+", "3, 3-, 3+", "2, 2-, 2+", "1, 1+"
     )
 
-    override fun getItemCount() = items.size
+    override fun getItemCount() = if (showAllSubjectsOnList) items.size else (if (items.isEmpty()) 0 else 1)
 
-    override fun getItemViewType(position: Int): Int {
-        return when (items[position].type) {
-            ViewType.SEMESTER, ViewType.PARTIAL -> R.layout.item_grade_statistics_pie
-            ViewType.POINTS -> R.layout.item_grade_statistics_bar
-        }
-    }
+    override fun getItemViewType(position: Int) = items[position].type.id
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
-        val viewHolder = LayoutInflater.from(parent.context).inflate(viewType, parent, false)
+        val inflater = LayoutInflater.from(parent.context)
         return when (viewType) {
-            R.layout.item_grade_statistics_bar -> GradeStatisticsBar(viewHolder)
-            else -> GradeStatisticsPie(viewHolder)
+            ViewType.PARTIAL.id, ViewType.SEMESTER.id -> PieViewHolder(ItemGradeStatisticsPieBinding.inflate(inflater, parent, false))
+            ViewType.POINTS.id -> BarViewHolder(ItemGradeStatisticsBarBinding.inflate(inflater, parent, false))
+            else -> throw IllegalStateException()
         }
     }
 
     override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
         when (holder) {
-            is GradeStatisticsPie -> bindPieChart(holder, items[position].partial)
-            is GradeStatisticsBar -> bindBarChart(holder, items[position].points!!)
+            is PieViewHolder -> bindPieChart(holder, items[position].partial)
+            is BarViewHolder -> bindBarChart(holder, items[position].points!!)
         }
     }
 
-    private fun bindPieChart(holder: GradeStatisticsPie, partials: List<GradeStatistics>) {
-        with(holder.view.gradeStatisticsPieTitle) {
+    private fun bindPieChart(holder: PieViewHolder, partials: List<GradeStatistics>) {
+        with(holder.binding.gradeStatisticsPieTitle) {
             text = partials.firstOrNull()?.subject
-            visibility = if (items.size == 1) GONE else VISIBLE
+            visibility = if (items.size == 1 || !showAllSubjectsOnList) GONE else VISIBLE
         }
 
         val gradeColors = when (theme) {
@@ -105,10 +102,10 @@ class GradeStatisticsAdapter @Inject constructor() :
             valueTextColor = Color.WHITE
             setColors(partials.map {
                 gradeColors.single { color -> color.first == it.grade }.second
-            }.toIntArray(), holder.view.context)
+            }.toIntArray(), holder.binding.root.context)
         }
 
-        with(holder.view.gradeStatisticsPie) {
+        with(holder.binding.gradeStatisticsPie) {
             setTouchEnabled(false)
             if (partials.size == 1) animateXY(1000, 1000)
             data = PieData(dataset).apply {
@@ -140,8 +137,8 @@ class GradeStatisticsAdapter @Inject constructor() :
         }
     }
 
-    private fun bindBarChart(holder: GradeStatisticsBar, points: GradePointsStatistics) {
-        with(holder.view.gradeStatisticsBarTitle) {
+    private fun bindBarChart(holder: BarViewHolder, points: GradePointsStatistics) {
+        with(holder.binding.gradeStatisticsBarTitle) {
             text = points.subject
             visibility = if (items.size == 1) GONE else VISIBLE
         }
@@ -153,14 +150,14 @@ class GradeStatisticsAdapter @Inject constructor() :
 
         with(dataset) {
             valueTextSize = 12f
-            valueTextColor = holder.view.context.getThemeAttrColor(android.R.attr.textColorPrimary)
+            valueTextColor = holder.binding.root.context.getThemeAttrColor(android.R.attr.textColorPrimary)
             valueFormatter = object : ValueFormatter() {
                 override fun getBarLabel(barEntry: BarEntry) = "${barEntry.y}%"
             }
             colors = gradePointsColors
         }
 
-        with(holder.view.gradeStatisticsBar) {
+        with(holder.binding.gradeStatisticsBar) {
             setTouchEnabled(false)
             if (items.size == 1) animateXY(1000, 1000)
             data = BarData(dataset).apply {
@@ -183,7 +180,7 @@ class GradeStatisticsAdapter @Inject constructor() :
 
             description.isEnabled = false
 
-            holder.view.context.getThemeAttrColor(android.R.attr.textColorPrimary).let {
+            holder.binding.root.context.getThemeAttrColor(android.R.attr.textColorPrimary).let {
                 axisLeft.textColor = it
                 axisRight.textColor = it
             }
@@ -203,7 +200,9 @@ class GradeStatisticsAdapter @Inject constructor() :
         }
     }
 
-    class GradeStatisticsPie(val view: View) : RecyclerView.ViewHolder(view)
+    private class PieViewHolder(val binding: ItemGradeStatisticsPieBinding) :
+        RecyclerView.ViewHolder(binding.root)
 
-    class GradeStatisticsBar(val view: View) : RecyclerView.ViewHolder(view)
+    private class BarViewHolder(val binding: ItemGradeStatisticsBarBinding) :
+        RecyclerView.ViewHolder(binding.root)
 }

app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsFragment.kt

@@ -1,23 +1,23 @@
 package io.github.wulkanowy.ui.modules.grade.statistics
 
 import android.os.Bundle
-import android.view.LayoutInflater
 import android.view.View
-import android.view.ViewGroup
 import android.widget.ArrayAdapter
 import android.widget.TextView
 import androidx.recyclerview.widget.LinearLayoutManager
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.pojos.GradeStatisticsItem
+import io.github.wulkanowy.databinding.FragmentGradeStatisticsBinding
 import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.grade.GradeFragment
 import io.github.wulkanowy.ui.modules.grade.GradeView
 import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.setOnItemSelectedListener
-import kotlinx.android.synthetic.main.fragment_grade_statistics.*
 import javax.inject.Inject
 
-class GradeStatisticsFragment : BaseFragment(), GradeStatisticsView, GradeView.GradeChildView {
+class GradeStatisticsFragment :
+    BaseFragment<FragmentGradeStatisticsBinding>(R.layout.fragment_grade_statistics),
+    GradeStatisticsView, GradeView.GradeChildView {
 
     @Inject
     lateinit var presenter: GradeStatisticsPresenter
@@ -36,24 +36,21 @@ class GradeStatisticsFragment : BaseFragment(), GradeStatisticsView, GradeView.G
     override val isViewEmpty get() = statisticsAdapter.items.isEmpty()
 
     override val currentType
-        get() = when (gradeStatisticsTypeSwitch.checkedRadioButtonId) {
+        get() = when (binding.gradeStatisticsTypeSwitch.checkedRadioButtonId) {
             R.id.gradeStatisticsTypeSemester -> ViewType.SEMESTER
             R.id.gradeStatisticsTypePartial -> ViewType.PARTIAL
             else -> ViewType.POINTS
         }
 
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.fragment_grade_statistics, container, false)
-    }
-
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
-        messageContainer = gradeStatisticsSwipe
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding = FragmentGradeStatisticsBinding.bind(view)
+        messageContainer = binding.gradeStatisticsSwipe
         presenter.onAttachView(this, savedInstanceState?.getSerializable(SAVED_CHART_TYPE) as? ViewType)
     }
 
     override fun initView() {
-        with(gradeStatisticsRecycler) {
+        with(binding.gradeStatisticsRecycler) {
             layoutManager = LinearLayoutManager(requireContext())
             adapter = statisticsAdapter
         }
@@ -61,16 +58,18 @@ class GradeStatisticsFragment : BaseFragment(), GradeStatisticsView, GradeView.G
         subjectsAdapter = ArrayAdapter(requireContext(), android.R.layout.simple_spinner_item, mutableListOf())
         subjectsAdapter.setDropDownViewResource(R.layout.item_attendance_summary_subject)
 
-        with(gradeStatisticsSubjects) {
+        with(binding.gradeStatisticsSubjects) {
             adapter = subjectsAdapter
             setOnItemSelectedListener<TextView> { presenter.onSubjectSelected(it?.text?.toString()) }
         }
 
-        gradeStatisticsSubjectsContainer.setElevationCompat(requireContext().dpToPx(1f))
+        with(binding) {
+            gradeStatisticsSubjectsContainer.setElevationCompat(requireContext().dpToPx(1f))
 
-        gradeStatisticsSwipe.setOnRefreshListener(presenter::onSwipeRefresh)
-        gradeStatisticsErrorRetry.setOnClickListener { presenter.onRetry() }
-        gradeStatisticsErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+            gradeStatisticsSwipe.setOnRefreshListener(presenter::onSwipeRefresh)
+            gradeStatisticsErrorRetry.setOnClickListener { presenter.onRetry() }
+            gradeStatisticsErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+        }
     }
 
     override fun updateSubjects(data: ArrayList<String>) {
@@ -81,15 +80,17 @@ class GradeStatisticsFragment : BaseFragment(), GradeStatisticsView, GradeView.G
         }
     }
 
-    override fun updateData(items: List<GradeStatisticsItem>, theme: String) {
-        statisticsAdapter.theme = theme
-        statisticsAdapter.items = items
-        statisticsAdapter.notifyDataSetChanged()
+    override fun updateData(items: List<GradeStatisticsItem>, theme: String, showAllSubjectsOnStatisticsList: Boolean) {
+        with(statisticsAdapter) {
+            this.showAllSubjectsOnList = showAllSubjectsOnStatisticsList
+            this.theme = theme
+            this.items = items
+            notifyDataSetChanged()
+        }
     }
 
     override fun showSubjects(show: Boolean) {
-        gradeStatisticsSubjectsContainer.visibility = if (show) View.VISIBLE else View.INVISIBLE
-        gradeStatisticsTypeSwitch.visibility = if (show) View.VISIBLE else View.INVISIBLE
+        binding.gradeStatisticsSubjectsContainer.visibility = if (show) View.VISIBLE else View.GONE
     }
 
     override fun clearView() {
@@ -97,35 +98,35 @@ class GradeStatisticsFragment : BaseFragment(), GradeStatisticsView, GradeView.G
     }
 
     override fun resetView() {
-        gradeStatisticsScroll.scrollTo(0, 0)
+        binding.gradeStatisticsScroll.scrollTo(0, 0)
     }
 
     override fun showContent(show: Boolean) {
-        gradeStatisticsRecycler.visibility = if (show) View.VISIBLE else View.GONE
+        binding.gradeStatisticsRecycler.visibility = if (show) View.VISIBLE else View.GONE
     }
 
     override fun showEmpty(show: Boolean) {
-        gradeStatisticsEmpty.visibility = if (show) View.VISIBLE else View.INVISIBLE
+        binding.gradeStatisticsEmpty.visibility = if (show) View.VISIBLE else View.INVISIBLE
     }
 
     override fun showErrorView(show: Boolean) {
-        gradeStatisticsError.visibility = if (show) View.VISIBLE else View.GONE
+        binding.gradeStatisticsError.visibility = if (show) View.VISIBLE else View.GONE
     }
 
     override fun setErrorDetails(message: String) {
-        gradeStatisticsErrorMessage.text = message
+        binding.gradeStatisticsErrorMessage.text = message
     }
 
     override fun showProgress(show: Boolean) {
-        gradeStatisticsProgress.visibility = if (show) View.VISIBLE else View.GONE
+        binding.gradeStatisticsProgress.visibility = if (show) View.VISIBLE else View.GONE
     }
 
     override fun enableSwipe(enable: Boolean) {
-        gradeStatisticsSwipe.isEnabled = enable
+        binding.gradeStatisticsSwipe.isEnabled = enable
     }
 
     override fun showRefresh(show: Boolean) {
-        gradeStatisticsSwipe.isRefreshing = show
+        binding.gradeStatisticsSwipe.isRefreshing = show
     }
 
     override fun onParentLoadData(semesterId: Int, forceRefresh: Boolean) {
@@ -150,7 +151,7 @@ class GradeStatisticsFragment : BaseFragment(), GradeStatisticsView, GradeView.G
 
     override fun onResume() {
         super.onResume()
-        gradeStatisticsTypeSwitch.setOnCheckedChangeListener { _, _ -> presenter.onTypeChange() }
+        binding.gradeStatisticsTypeSwitch.setOnCheckedChangeListener { _, _ -> presenter.onTypeChange() }
     }
 
     override fun onSaveInstanceState(outState: Bundle) {
@@ -159,7 +160,7 @@ class GradeStatisticsFragment : BaseFragment(), GradeStatisticsView, GradeView.G
     }
 
     override fun onDestroyView() {
-        super.onDestroyView()
         presenter.onDetachView()
+        super.onDestroyView()
     }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsPresenter.kt

@@ -128,10 +128,7 @@ class GradeStatisticsPresenter @Inject constructor(
             .observeOn(schedulers.mainThread)
             .subscribe({
                 Timber.i("Loading grade stats subjects result: Success")
-                view?.run {
-                    updateSubjects(it)
-                    showSubjects(true)
-                }
+                view?.updateSubjects(it)
             }, {
                 Timber.i("Loading grade stats subjects result: An exception occurred")
                 errorHandler.dispatch(it)
@@ -140,22 +137,21 @@ class GradeStatisticsPresenter @Inject constructor(
     }
 
     private fun loadDataByType(semesterId: Int, subjectName: String, type: ViewType, forceRefresh: Boolean = false) {
-        currentSubjectName = subjectName
+        currentSubjectName = if (preferencesRepository.showAllSubjectsOnStatisticsList) "Wszystkie" else subjectName
         currentType = type
-        loadData(semesterId, subjectName, type, forceRefresh)
-    }
 
-    private fun loadData(semesterId: Int, subjectName: String, type: ViewType, forceRefresh: Boolean) {
         Timber.i("Loading grade stats data started")
         disposable.add(studentRepository.getCurrentStudent()
             .flatMap { student ->
                 semesterRepository.getSemesters(student).flatMap { semesters ->
                     val semester = semesters.first { item -> item.semesterId == semesterId }
 
-                    when (type) {
-                        ViewType.SEMESTER -> gradeStatisticsRepository.getGradesStatistics(student, semester, subjectName, true, forceRefresh)
-                        ViewType.PARTIAL -> gradeStatisticsRepository.getGradesStatistics(student, semester, subjectName, false, forceRefresh)
-                        ViewType.POINTS -> gradeStatisticsRepository.getGradesPointsStatistics(student, semester, subjectName, forceRefresh)
+                    with(gradeStatisticsRepository) {
+                        when (type) {
+                            ViewType.SEMESTER -> getGradesStatistics(student, semester, currentSubjectName, true, forceRefresh)
+                            ViewType.PARTIAL -> getGradesStatistics(student, semester, currentSubjectName, false, forceRefresh)
+                            ViewType.POINTS -> getGradesPointsStatistics(student, semester, currentSubjectName, forceRefresh)
+                        }
                     }
                 }
             }
@@ -175,7 +171,8 @@ class GradeStatisticsPresenter @Inject constructor(
                     showEmpty(it.isEmpty())
                     showContent(it.isNotEmpty())
                     showErrorView(false)
-                    updateData(it, preferencesRepository.gradeColorTheme)
+                    updateData(it, preferencesRepository.gradeColorTheme, preferencesRepository.showAllSubjectsOnStatisticsList)
+                    showSubjects(!preferencesRepository.showAllSubjectsOnStatisticsList)
                 }
                 analytics.logEvent("load_grade_statistics", "items" to it.size, "force_refresh" to forceRefresh)
             }) {

app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsView.kt

@@ -13,7 +13,7 @@ interface GradeStatisticsView : BaseView {
 
     fun updateSubjects(data: ArrayList<String>)
 
-    fun updateData(items: List<GradeStatisticsItem>, theme: String)
+    fun updateData(items: List<GradeStatisticsItem>, theme: String, showAllSubjectsOnStatisticsList: Boolean)
 
     fun showSubjects(show: Boolean)
 

app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/ViewType.kt

@@ -1,7 +1,7 @@
 package io.github.wulkanowy.ui.modules.grade.statistics
 
-enum class ViewType {
-    SEMESTER,
-    PARTIAL,
-    POINTS
+enum class ViewType(val id: Int) {
+    SEMESTER(1),
+    PARTIAL(2),
+    POINTS(3)
 }

app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryAdapter.kt

@@ -0,0 +1,85 @@
+package io.github.wulkanowy.ui.modules.grade.summary
+
+import android.annotation.SuppressLint
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import io.github.wulkanowy.data.db.entities.GradeSummary
+import io.github.wulkanowy.databinding.ItemGradeSummaryBinding
+import io.github.wulkanowy.databinding.ScrollableHeaderGradeSummaryBinding
+import io.github.wulkanowy.utils.calcAverage
+import java.util.Locale
+import javax.inject.Inject
+
+class GradeSummaryAdapter @Inject constructor() : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
+
+    private enum class ViewType(val id: Int) {
+        HEADER(1),
+        ITEM(2)
+    }
+
+    var items = emptyList<GradeSummary>()
+
+    override fun getItemCount() = items.size + 1
+
+    override fun getItemViewType(position: Int) = when (position) {
+        0 -> ViewType.HEADER.id
+        else -> ViewType.ITEM.id
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
+        val inflater = LayoutInflater.from(parent.context)
+
+        return when (viewType) {
+            ViewType.HEADER.id -> HeaderViewHolder(ScrollableHeaderGradeSummaryBinding.inflate(inflater, parent, false))
+            ViewType.ITEM.id -> ItemViewHolder(ItemGradeSummaryBinding.inflate(inflater, parent, false))
+            else -> throw IllegalStateException()
+        }
+    }
+
+    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
+        when (holder) {
+            is HeaderViewHolder -> bindHeaderViewHolder(holder.binding)
+            is ItemViewHolder -> bindItemViewHolder(holder.binding, items[position - 1])
+        }
+    }
+
+    private fun bindHeaderViewHolder(binding: ScrollableHeaderGradeSummaryBinding) {
+        if (items.isEmpty()) return
+
+        with(binding) {
+            gradeSummaryScrollableHeaderFinal.text = formatAverage(items.calcAverage())
+            gradeSummaryScrollableHeaderCalculated.text = formatAverage(items
+                .filter { value -> value.average != 0.0 }
+                .map { values -> values.average }
+                .reversed() // fix average precision
+                .average()
+            )
+        }
+    }
+
+    @SuppressLint("SetTextI18n")
+    private fun bindItemViewHolder(binding: ItemGradeSummaryBinding, item: GradeSummary) {
+        with(binding) {
+            gradeSummaryItemTitle.text = item.subject
+            gradeSummaryItemPoints.text = item.pointsSum
+            gradeSummaryItemAverage.text = formatAverage(item.average, "")
+            gradeSummaryItemPredicted.text = "${item.predictedGrade} ${item.proposedPoints}".trim()
+            gradeSummaryItemFinal.text = "${item.finalGrade} ${item.finalPoints}".trim()
+
+            gradeSummaryItemPointsContainer.visibility = if (item.pointsSum.isBlank()) View.GONE else View.VISIBLE
+        }
+    }
+
+    private fun formatAverage(average: Double, defaultValue: String = "-- --"): String {
+        return if (average == 0.0) defaultValue
+        else String.format(Locale.FRANCE, "%.2f", average)
+    }
+
+    private class HeaderViewHolder(val binding: ScrollableHeaderGradeSummaryBinding) :
+        RecyclerView.ViewHolder(binding.root)
+
+    private class ItemViewHolder(val binding: ItemGradeSummaryBinding) :
+        RecyclerView.ViewHolder(binding.root)
+}

app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryFragment.kt

@@ -1,36 +1,35 @@
 package io.github.wulkanowy.ui.modules.grade.summary
 
 import android.os.Bundle
-import android.view.LayoutInflater
 import android.view.View
 import android.view.View.GONE
 import android.view.View.INVISIBLE
 import android.view.View.VISIBLE
-import android.view.ViewGroup
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import androidx.recyclerview.widget.LinearLayoutManager
 import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.GradeSummary
+import io.github.wulkanowy.databinding.FragmentGradeSummaryBinding
 import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.grade.GradeFragment
 import io.github.wulkanowy.ui.modules.grade.GradeView
-import kotlinx.android.synthetic.main.fragment_grade_summary.*
 import javax.inject.Inject
 
-class GradeSummaryFragment : BaseFragment(), GradeSummaryView, GradeView.GradeChildView {
+class GradeSummaryFragment :
+    BaseFragment<FragmentGradeSummaryBinding>(R.layout.fragment_grade_summary), GradeSummaryView,
+    GradeView.GradeChildView {
 
     @Inject
     lateinit var presenter: GradeSummaryPresenter
 
     @Inject
-    lateinit var gradeSummaryAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+    lateinit var gradeSummaryAdapter: GradeSummaryAdapter
 
     companion object {
         fun newInstance() = GradeSummaryFragment()
     }
 
     override val isViewEmpty
-        get() = gradeSummaryAdapter.isEmpty
+        get() = gradeSummaryAdapter.items.isEmpty()
 
     override val predictedString
         get() = getString(R.string.grade_summary_predicted_grade)
@@ -38,70 +37,69 @@ class GradeSummaryFragment : BaseFragment(), GradeSummaryView, GradeView.GradeCh
     override val finalString
         get() = getString(R.string.grade_summary_final_grade)
 
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        return inflater.inflate(R.layout.fragment_grade_summary, container, false)
-    }
-
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
-        messageContainer = gradeSummaryRecycler
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding = FragmentGradeSummaryBinding.bind(view)
+        messageContainer = binding.gradeSummaryRecycler
         presenter.onAttachView(this)
     }
 
     override fun initView() {
-        gradeSummaryAdapter.setDisplayHeadersAtStartUp(true)
-
-        gradeSummaryRecycler.run {
-            layoutManager = SmoothScrollLinearLayoutManager(context)
+        with(binding.gradeSummaryRecycler) {
+            layoutManager = LinearLayoutManager(context)
             adapter = gradeSummaryAdapter
         }
-        gradeSummarySwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
-        gradeSummaryErrorRetry.setOnClickListener { presenter.onRetry() }
-        gradeSummaryErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+        with(binding) {
+            gradeSummarySwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+            gradeSummaryErrorRetry.setOnClickListener { presenter.onRetry() }
+            gradeSummaryErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+        }
     }
 
-    override fun updateData(data: List<GradeSummaryItem>, header: GradeSummaryScrollableHeader) {
-        gradeSummaryAdapter.apply {
-            updateDataSet(data, true)
-            removeAllScrollableHeaders()
-            addScrollableHeader(header)
+    override fun updateData(data: List<GradeSummary>) {
+        with(gradeSummaryAdapter) {
+            items = data
+            notifyDataSetChanged()
         }
     }
 
     override fun clearView() {
-        gradeSummaryAdapter.clear()
+        with(gradeSummaryAdapter) {
+            items = emptyList()
+            notifyDataSetChanged()
+        }
     }
 
     override fun resetView() {
-        gradeSummaryRecycler.scrollToPosition(0)
+        binding.gradeSummaryRecycler.scrollToPosition(0)
     }
 
     override fun showContent(show: Boolean) {
-        gradeSummaryRecycler.visibility = if (show) VISIBLE else INVISIBLE
+        binding.gradeSummaryRecycler.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun showEmpty(show: Boolean) {
-        gradeSummaryEmpty.visibility = if (show) VISIBLE else INVISIBLE
+        binding.gradeSummaryEmpty.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun showErrorView(show: Boolean) {
-        gradeSummaryError.visibility = if (show) VISIBLE else INVISIBLE
+        binding.gradeSummaryError.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun setErrorDetails(message: String) {
-        gradeSummaryErrorMessage.text = message
+        binding.gradeSummaryErrorMessage.text = message
     }
 
     override fun showProgress(show: Boolean) {
-        gradeSummaryProgress.visibility = if (show) VISIBLE else GONE
+        binding.gradeSummaryProgress.visibility = if (show) VISIBLE else GONE
     }
 
     override fun enableSwipe(enable: Boolean) {
-        gradeSummarySwipe.isEnabled = enable
+        binding.gradeSummarySwipe.isEnabled = enable
     }
 
     override fun showRefresh(show: Boolean) {
-        gradeSummarySwipe.isRefreshing = show
+        binding.gradeSummarySwipe.isRefreshing = show
     }
 
     override fun onParentLoadData(semesterId: Int, forceRefresh: Boolean) {
@@ -125,7 +123,7 @@ class GradeSummaryFragment : BaseFragment(), GradeSummaryView, GradeView.GradeCh
     }
 
     override fun onDestroyView() {
-        super.onDestroyView()
         presenter.onDetachView()
+        super.onDestroyView()
     }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryItem.kt

@@ -1,64 +0,0 @@
-package io.github.wulkanowy.ui.modules.grade.summary
-
-import android.annotation.SuppressLint
-import android.view.View
-import android.view.View.GONE
-import android.view.View.VISIBLE
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.FlexibleViewHolder
-import io.github.wulkanowy.R
-import io.github.wulkanowy.data.db.entities.GradeSummary
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.item_grade_summary.*
-
-class GradeSummaryItem(
-    val summary: GradeSummary,
-    private val average: String
-) : AbstractFlexibleItem<GradeSummaryItem.ViewHolder>() {
-
-    override fun getLayoutRes() = R.layout.item_grade_summary
-
-    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>): ViewHolder {
-        return ViewHolder(view, adapter)
-    }
-
-    @SuppressLint("SetTextI18n")
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
-        holder.run {
-            gradeSummaryItemTitle.text = summary.subject
-            gradeSummaryItemPoints.text = summary.pointsSum
-            gradeSummaryItemAverage.text = average
-            gradeSummaryItemPredicted.text = "${summary.predictedGrade} ${summary.proposedPoints}".trim()
-            gradeSummaryItemFinal.text = "${summary.finalGrade} ${summary.finalPoints}".trim()
-
-            gradeSummaryItemPointsContainer.visibility = if (summary.pointsSum.isBlank()) GONE else VISIBLE
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as GradeSummaryItem
-
-        if (average != other.average) return false
-        if (summary != other.summary) return false
-        if (summary.id != other.summary.id) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        var result = summary.hashCode()
-        result = 31 * result + summary.id.hashCode()
-        result = 31 * result + average.hashCode()
-        return result
-    }
-
-    class ViewHolder(view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter), LayoutContainer {
-        override val containerView: View
-            get() = contentView
-    }
-}

app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryPresenter.kt

@@ -1,26 +1,20 @@
 package io.github.wulkanowy.ui.modules.grade.summary
 
 import io.github.wulkanowy.data.db.entities.GradeSummary
-import io.github.wulkanowy.data.repositories.gradessummary.GradeSummaryRepository
-import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.ui.modules.grade.GradeAverageProvider
+import io.github.wulkanowy.ui.modules.grade.GradeDetailsWithAverage
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
-import io.github.wulkanowy.utils.calcAverage
 import timber.log.Timber
-import java.lang.String.format
-import java.util.Locale.FRANCE
 import javax.inject.Inject
 
 class GradeSummaryPresenter @Inject constructor(
     schedulers: SchedulersProvider,
     errorHandler: ErrorHandler,
     studentRepository: StudentRepository,
-    private val gradeSummaryRepository: GradeSummaryRepository,
-    private val semesterRepository: SemesterRepository,
     private val averageProvider: GradeAverageProvider,
     private val analytics: FirebaseAnalyticsHelper
 ) : BasePresenter<GradeSummaryView>(errorHandler, studentRepository, schedulers) {
@@ -36,15 +30,8 @@ class GradeSummaryPresenter @Inject constructor(
     fun onParentViewLoadData(semesterId: Int, forceRefresh: Boolean) {
         Timber.i("Loading grade summary data started")
         disposable.add(studentRepository.getCurrentStudent()
-            .flatMap { semesterRepository.getSemesters(it).map { semesters -> it to semesters } }
-            .flatMap { (student, semesters) ->
-                gradeSummaryRepository.getGradesSummary(student, semesters.first { it.semesterId == semesterId }, forceRefresh)
-                    .map { it.sortedBy { subject -> subject.subject } }
-                    .flatMap { gradesSummary ->
-                        averageProvider.getGradeAverage(student, semesters, semesterId, forceRefresh)
-                            .map { averages -> createGradeSummaryItemsAndHeader(gradesSummary, averages) }
-                    }
-            }
+            .flatMap { averageProvider.getGradesDetailsWithAverage(it, semesterId, forceRefresh) }
+            .map { createGradeSummaryItems(it) }
             .subscribeOn(schedulers.backgroundThread)
             .observeOn(schedulers.mainThread)
             .doFinally {
@@ -54,15 +41,15 @@ class GradeSummaryPresenter @Inject constructor(
                     enableSwipe(true)
                     notifyParentDataLoaded(semesterId)
                 }
-            }.subscribe({ (gradeSummaryItems, gradeSummaryHeader) ->
+            }.subscribe({
                 Timber.i("Loading grade summary result: Success")
                 view?.run {
-                    showEmpty(gradeSummaryItems.isEmpty())
-                    showContent(gradeSummaryItems.isNotEmpty())
+                    showEmpty(it.isEmpty())
+                    showContent(it.isNotEmpty())
                     showErrorView(false)
-                    updateData(gradeSummaryItems, gradeSummaryHeader)
+                    updateData(it)
                 }
-                analytics.logEvent("load_grade_summary", "items" to gradeSummaryItems.size, "force_refresh" to forceRefresh)
+                analytics.logEvent("load_grade_summary", "items" to it.size, "force_refresh" to forceRefresh)
             }) {
                 Timber.i("Loading grade summary result: An exception occurred")
                 errorHandler.dispatch(it)
@@ -115,21 +102,10 @@ class GradeSummaryPresenter @Inject constructor(
         disposable.clear()
     }
 
-    private fun createGradeSummaryItemsAndHeader(gradesSummary: List<GradeSummary>, averages: List<Triple<String, Double, String>>): Pair<List<GradeSummaryItem>, GradeSummaryScrollableHeader> {
-        return averages.filter { value -> value.second != 0.0 }
-            .let { filteredAverages ->
-                gradesSummary.filter { !checkEmpty(it, filteredAverages) }
-                    .map { gradeSummary ->
-                        GradeSummaryItem(
-                            summary = gradeSummary,
-                            average = formatAverage(filteredAverages.singleOrNull { gradeSummary.subject == it.first }?.second ?: .0, "")
-                        )
-                    }.let {
-                        it to GradeSummaryScrollableHeader(
-                            formatAverage(gradesSummary.calcAverage()),
-                            formatAverage(filteredAverages.map { values -> values.second }.average()))
-                    }
-            }
+    private fun createGradeSummaryItems(items: List<GradeDetailsWithAverage>): List<GradeSummary> {
+        return items.map {
+            it.summary.copy(average = it.average)
+        }
     }
 
     private fun checkEmpty(gradeSummary: GradeSummary, averages: List<Triple<String, Double, String>>): Boolean {
@@ -137,9 +113,4 @@ class GradeSummaryPresenter @Inject constructor(
             finalGrade.isBlank() && predictedGrade.isBlank() && averages.singleOrNull { it.first == subject } == null
         }
     }
-
-    private fun formatAverage(average: Double, defaultValue: String = "-- --"): String {
-        return if (average == 0.0) defaultValue
-        else format(FRANCE, "%.2f", average)
-    }
 }

app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryScrollableHeader.kt

@@ -1,53 +0,0 @@
-package io.github.wulkanowy.ui.modules.grade.summary
-
-import android.view.View
-import eu.davidea.flexibleadapter.FlexibleAdapter
-import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.viewholders.FlexibleViewHolder
-import io.github.wulkanowy.R
-import kotlinx.android.extensions.LayoutContainer
-import kotlinx.android.synthetic.main.scrollable_header_grade_summary.*
-
-class GradeSummaryScrollableHeader(private val finalAverage: String, private val calculatedAverage: String)
-    : AbstractFlexibleItem<GradeSummaryScrollableHeader.ViewHolder>() {
-
-    override fun getLayoutRes() = R.layout.scrollable_header_grade_summary
-
-    override fun createViewHolder(view: View?, adapter: FlexibleAdapter<IFlexible<*>>?): ViewHolder {
-        return ViewHolder(view, adapter)
-    }
-
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>?, holder: ViewHolder?,
-                                position: Int, payloads: MutableList<Any>?) {
-        holder?.apply {
-            gradeSummaryScrollableHeaderFinal.text = finalAverage
-            gradeSummaryScrollableHeaderCalculated.text = calculatedAverage
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as GradeSummaryScrollableHeader
-
-        if (calculatedAverage != other.calculatedAverage) return false
-        if (finalAverage != other.finalAverage) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        var result = calculatedAverage.hashCode()
-        result = 31 * result + finalAverage.hashCode()
-        return result
-    }
-
-    class ViewHolder(view: View?, adapter: FlexibleAdapter<IFlexible<*>>?) : FlexibleViewHolder(view, adapter),
-            LayoutContainer {
-
-        override val containerView: View?
-            get() = contentView
-    }
-}

app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryView.kt

@@ -1,5 +1,6 @@
 package io.github.wulkanowy.ui.modules.grade.summary
 
+import io.github.wulkanowy.data.db.entities.GradeSummary
 import io.github.wulkanowy.ui.base.BaseView
 
 interface GradeSummaryView : BaseView {
@@ -12,7 +13,7 @@ interface GradeSummaryView : BaseView {
 
     fun initView()
 
-    fun updateData(data: List<GradeSummaryItem>, header: GradeSummaryScrollableHeader)
+    fun updateData(data: List<GradeSummary>)
 
     fun resetView()
 

app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkAdapter.kt

@@ -0,0 +1,67 @@
+package io.github.wulkanowy.ui.modules.homework
+
+import android.annotation.SuppressLint
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import io.github.wulkanowy.data.db.entities.Homework
+import io.github.wulkanowy.databinding.HeaderHomeworkBinding
+import io.github.wulkanowy.databinding.ItemHomeworkBinding
+import io.github.wulkanowy.utils.toFormattedString
+import io.github.wulkanowy.utils.weekDayName
+import org.threeten.bp.LocalDate
+import javax.inject.Inject
+
+class HomeworkAdapter @Inject constructor() : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
+
+    var items = emptyList<HomeworkItem<*>>()
+
+    var onClickListener: (Homework) -> Unit = {}
+
+    override fun getItemCount() = items.size
+
+    override fun getItemViewType(position: Int) = items[position].viewType.id
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
+        val inflater = LayoutInflater.from(parent.context)
+
+        return when (viewType) {
+            HomeworkItem.ViewType.HEADER.id -> HeaderViewHolder(HeaderHomeworkBinding.inflate(inflater, parent, false))
+            HomeworkItem.ViewType.ITEM.id -> ItemViewHolder(ItemHomeworkBinding.inflate(inflater, parent, false))
+            else -> throw IllegalStateException()
+        }
+    }
+
+    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
+        when (holder) {
+            is HeaderViewHolder -> bindHeaderViewHolder(holder.binding, items[position].value as LocalDate)
+            is ItemViewHolder -> bindItemViewHolder(holder.binding, items[position].value as Homework)
+        }
+    }
+
+    @SuppressLint("DefaultLocale")
+    private fun bindHeaderViewHolder(binding: HeaderHomeworkBinding, date: LocalDate) {
+        with(binding) {
+            homeworkHeaderDay.text = date.weekDayName.capitalize()
+            homeworkHeaderDate.text = date.toFormattedString()
+        }
+    }
+
+    private fun bindItemViewHolder(binding: ItemHomeworkBinding, homework: Homework) {
+        with(binding) {
+            homeworkItemSubject.text = homework.subject
+            homeworkItemTeacher.text = homework.teacher
+            homeworkItemContent.text = homework.content
+            homeworkItemCheckImage.visibility = if (homework.isDone) View.VISIBLE else View.GONE
+            homeworkItemAttachmentImage.visibility = if (!homework.isDone && homework.attachments.isNotEmpty()) View.VISIBLE else View.GONE
+
+            root.setOnClickListener { onClickListener(homework) }
+        }
+    }
+
+    class HeaderViewHolder(val binding: HeaderHomeworkBinding) :
+        RecyclerView.ViewHolder(binding.root)
+
+    class ItemViewHolder(val binding: ItemHomeworkBinding) : RecyclerView.ViewHolder(binding.root)
+}