Version 0.3.0

* Refactor notifications
* Change grade notify icon

.circleci/config.yml

@@ -7,7 +7,7 @@ references:
 
   container_config: &container_config
     docker:
-      - image: circleci/android:api-27-alpha
+      - image: circleci/android:api-26-alpha
     working_directory: *workspace_root
     environment:
       environment:

.gitignore

@@ -32,6 +32,8 @@ local.properties
 .idea/tasks.xml
 .idea/vcs.xml
 .idea/workspace.xml
+.idea/caches/
+.idea/codeStyles/
 *.iml
 
 # OS-specific files

.gitlab-ci.yml

@@ -12,7 +12,7 @@ build:
   script:
     - ./gradlew --no-daemon --stacktrace dependencies || true
     - ./gradlew --no-daemon --stacktrace assembleDebug
-    - mv app/build/outputs/apk/app-debug.apk .
+    - mv app/build/outputs/apk/debug/app-debug.apk .
   artifacts:
     name: "${CI_PROJECT_NAME}_${CI_BUILD_REF_NAME}-${CI_BUILD_ID}"
     paths:
@@ -26,7 +26,7 @@ tests:
      - .gradle
     policy: pull
   script:
-    - ./gradlew --no-daemon --stacktrace test
+    - ./gradlew --no-daemon --stacktrace -x fabricGenerateResourcesRelease test
   artifacts:
     paths:
     - app/build/reports/tests
@@ -39,7 +39,7 @@ lint:
      - .gradle
     policy: pull
   script:
-    - ./gradlew --no-daemon --stacktrace lint
+    - ./gradlew --no-daemon --stacktrace -x fabricGenerateResourcesRelease lint
   artifacts:
     paths:
     - app/build/reports

README.md

@@ -4,9 +4,10 @@
 [![Bitrise](https://img.shields.io/bitrise/daeff1893f3c8128/master.svg?token=Hjm1ACamk86JDeVVJHOeqQ&style=flat-square)](https://www.bitrise.io/app/daeff1893f3c8128)
 [![Codecov](https://img.shields.io/codecov/c/github/wulkanowy/wulkanowy/master.svg?style=flat-square)](https://codecov.io/gh/wulkanowy/wulkanowy)
 [![BCH compliance](https://bettercodehub.com/edge/badge/wulkanowy/wulkanowy?branch=master)](https://bettercodehub.com/)
+[![Scrutinizer](https://img.shields.io/scrutinizer/g/wulkanowy/wulkanowy.svg)](https://scrutinizer-ci.com/g/wulkanowy/wulkanowy/?branch=master)
 [![Known Vulnerabilities](https://snyk.io/test/github/wulkanowy/wulkanowy/badge.svg?targetFile=app%2Fbuild.gradle&style=flat-square)](https://snyk.io/test/github/wulkanowy/wulkanowy?targetFile=app%2Fbuild.gradle)
 [![Bintray](https://img.shields.io/bintray/v/wulkanowy/wulkanowy/api.svg?style=flat-square)](https://bintray.com/wulkanowy/wulkanowy/api)
 
 [Pobierz wersję rozwojową](https://bitrise-redirector.herokuapp.com/v0.1/apps/daeff1893f3c8128/builds/master/artifacts/app-debug-bitrise-signed.apk)
 
-Wulkanowy to aplikacja na androida polepszająca wygodę używania dziennika UONET+.
+Androidowy klient dziennika VULCAN UONET+.

android-sonarqube.gradle

@@ -5,7 +5,7 @@ sonarqube {
     //noinspection GroovyAssignabilityCheck
     properties {
         def files = fileTree("${rootProject.projectDir}/api/build/libs/").filter { it.isFile() }.files.name
-        def libraries = project.android.sdkDirectory.getPath() + "/platforms/android-27/android.jar," +
+        def libraries = project.android.sdkDirectory.getPath() + "/platforms/android-26/android.jar," +
                 "${project.rootDir}/api/build/libs/" + files[0]
 
         property "sonar.projectName", GROUP_ID + ":app"

api/build.gradle

@@ -28,12 +28,12 @@ jacocoTestReport {
 }
 
 dependencies {
-    implementation 'org.jsoup:jsoup:1.10.3'
-    implementation 'org.apache.commons:commons-lang3:3.7'
-    implementation 'com.google.code.gson:gson:2.8.2'
+    implementation "org.jsoup:jsoup:$jsoup"
+    implementation "org.apache.commons:commons-lang3:$apacheLang"
+    implementation "com.google.code.gson:gson:$gson"
 
-    testImplementation 'junit:junit:4.12'
-    testImplementation 'org.mockito:mockito-core:2.13.0'
+    testImplementation "junit:junit:$junit"
+    testImplementation "org.mockito:mockito-core:$mockito"
 }
 
 version = PUBLISH_VERSION

api/src/main/java/io/github/wulkanowy/api/Client.java

@@ -108,7 +108,11 @@ public class Client {
 
         this.cookies.addItems(response.cookies());
 
-        return checkForErrors(response.parse());
+        Document doc = checkForErrors(response.parse());
+
+        lastSuccessRequest = new Date();
+
+        return doc;
     }
 
     public Document postPageByUrl(String url, String[][] params) throws IOException, VulcanException {
@@ -165,16 +169,16 @@ public class Client {
     }
 
     Document checkForErrors(Document doc) throws VulcanException {
-        if ("Przerwa techniczna".equals(doc.select("title").text())) {
-            throw new VulcanOfflineException();
+        String title = doc.select("title").text();
+        if ("Przerwa techniczna".equals(title)) {
+            throw new VulcanOfflineException(title);
         }
 
-        if ("Zaloguj się".equals(doc.select(".loginButton").text())) {
-            throw new NotLoggedInErrorException();
+        String singIn = doc.select(".loginButton").text();
+        if ("Zaloguj się".equals(singIn)) {
+            throw new NotLoggedInErrorException(singIn);
         }
 
-        lastSuccessRequest = new Date();
-
         return doc;
     }
 }

api/src/main/java/io/github/wulkanowy/api/NotLoggedInErrorException.java

@@ -1,4 +1,8 @@
 package io.github.wulkanowy.api;
 
 public class NotLoggedInErrorException extends VulcanException {
+
+    public NotLoggedInErrorException(String message) {
+        super(message);
+    }
 }

api/src/main/java/io/github/wulkanowy/api/StudentAndParent.java

@@ -48,7 +48,7 @@ public class StudentAndParent implements SnP {
         Element studentTileLink = startPage.select(".panel.linkownia.pracownik.klient > a").first();
 
         if (null == studentTileLink) {
-            throw new NotLoggedInErrorException();
+            throw new NotLoggedInErrorException("You are probably not logged in. Force login");
         }
 
         String snpPageUrl = studentTileLink.attr("href");
@@ -62,7 +62,7 @@ public class StudentAndParent implements SnP {
         String[] path = snpPageUrl.split(client.getHost())[1].split("/");
 
         if (5 != path.length) {
-            throw new NotLoggedInErrorException();
+            throw new NotLoggedInErrorException("You are probably not logged in");
         }
 
         return path[2];

api/src/main/java/io/github/wulkanowy/api/Vulcan.java

@@ -32,7 +32,7 @@ public class Vulcan {
 
     public Client getClient() throws NotLoggedInErrorException {
         if (null == client) {
-            throw new NotLoggedInErrorException();
+            throw new NotLoggedInErrorException("Use setCredentials() method first");
         }
 
         return client;

api/src/main/java/io/github/wulkanowy/api/VulcanException.java

@@ -1,4 +1,8 @@
 package io.github.wulkanowy.api;
 
 public abstract class VulcanException extends Exception {
+
+    protected VulcanException(String message) {
+        super(message);
+    }
 }

api/src/main/java/io/github/wulkanowy/api/VulcanOfflineException.java

@@ -1,4 +1,8 @@
 package io.github.wulkanowy.api;
 
 public class VulcanOfflineException extends VulcanException {
+
+    VulcanOfflineException(String message) {
+        super(message);
+    }
 }

api/src/main/java/io/github/wulkanowy/api/login/AccountPermissionException.java

@@ -3,4 +3,8 @@ package io.github.wulkanowy.api.login;
 import io.github.wulkanowy.api.VulcanException;
 
 public class AccountPermissionException extends VulcanException {
+
+    AccountPermissionException(String message) {
+        super(message);
+    }
 }

api/src/main/java/io/github/wulkanowy/api/login/BadCredentialsException.java

@@ -3,4 +3,8 @@ package io.github.wulkanowy.api.login;
 import io.github.wulkanowy.api.VulcanException;
 
 public class BadCredentialsException extends VulcanException {
+
+    BadCredentialsException(String message) {
+        super(message);
+    }
 }

api/src/main/java/io/github/wulkanowy/api/login/Login.java

@@ -2,6 +2,7 @@ package io.github.wulkanowy.api.login;
 
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
 import org.jsoup.parser.Parser;
 import org.jsoup.select.Elements;
 
@@ -42,8 +43,9 @@ public class Login {
                 {"Password", password}
         });
 
-        if (null != html.select(".ErrorMessage").first()) {
-            throw new BadCredentialsException();
+        Element errorMessage = html.select(".ErrorMessage").first();
+        if (null != errorMessage) {
+            throw new BadCredentialsException(errorMessage.text());
         }
 
         return html.select("input[name=wresult]").attr("value");
@@ -59,11 +61,11 @@ public class Login {
         }).select("title").text();
 
         if ("Logowanie".equals(title)) {
-            throw new AccountPermissionException();
+            throw new AccountPermissionException("No account access. Try another symbol");
         }
 
         if (!"Uonet+".equals(title)) {
-            throw new LoginErrorException();
+            throw new LoginErrorException("Could not log in, unknown error");
         }
 
         return this.symbol;

api/src/main/java/io/github/wulkanowy/api/login/LoginErrorException.java

@@ -2,5 +2,9 @@ package io.github.wulkanowy.api.login;
 
 import io.github.wulkanowy.api.NotLoggedInErrorException;
 
-public class LoginErrorException extends NotLoggedInErrorException {
+class LoginErrorException extends NotLoggedInErrorException {
+
+    LoginErrorException(String message) {
+        super(message);
+    }
 }

api/src/main/java/io/github/wulkanowy/api/messages/BadRequestException.java

@@ -3,4 +3,8 @@ package io.github.wulkanowy.api.messages;
 import io.github.wulkanowy.api.VulcanException;
 
 class BadRequestException extends VulcanException {
+
+    BadRequestException(String message) {
+        super(message);
+    }
 }

api/src/main/java/io/github/wulkanowy/api/messages/Messages.java

@@ -59,10 +59,10 @@ public class Messages {
             messages = new Gson().fromJson(res, MessagesContainer.class).data;
         } catch (JsonParseException e) {
             if (res.contains(ERROR_TITLE)) {
-                throw new BadRequestException();
+                throw new BadRequestException(ERROR_TITLE);
             }
 
-            throw new NotLoggedInErrorException();
+            throw new NotLoggedInErrorException("You are probably not logged in");
         }
 
         return messages;
@@ -80,10 +80,10 @@ public class Messages {
             message = new Gson().fromJson(res, MessageContainer.class).data;
         } catch (JsonParseException e) {
             if (res.contains(ERROR_TITLE)) {
-                throw new BadRequestException();
+                throw new BadRequestException(ERROR_TITLE);
             }
 
-            throw new NotLoggedInErrorException();
+            throw new NotLoggedInErrorException("You are probably not logged in. Force login");
         }
 
         return message;

app/build.gradle

@@ -21,15 +21,15 @@ apply from: '../jacoco.gradle'
 apply from: '../android-sonarqube.gradle'
 
 android {
-    compileSdkVersion 27
-    buildToolsVersion "27.0.3"
+    compileSdkVersion 26
+    buildToolsVersion '27.0.3'
     defaultConfig {
         applicationId "io.github.wulkanowy"
         testApplicationId "io.github.tests.wulkanowy"
         minSdkVersion 15
-        targetSdkVersion 27
-        versionCode 4
-        versionName "0.2.1"
+        targetSdkVersion 26
+        versionCode 6
+        versionName "0.3.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
         manifestPlaceholders = [
@@ -68,42 +68,40 @@ greendao {
 
 dependencies {
     implementation project(':api')
-    implementation 'com.android.support:appcompat-v7:27.1.0'
-    implementation 'com.android.support:design:27.1.0'
-    implementation 'com.android.support:support-v4:27.1.0'
-    implementation 'com.android.support:recyclerview-v7:27.1.0'
-    implementation 'com.android.support:cardview-v7:27.1.0'
-    implementation 'com.android.support:customtabs:27.1.0'
-    implementation 'com.firebase:firebase-jobdispatcher:0.8.5'
-    implementation 'org.apache.commons:commons-lang3:3.7'
-    implementation 'eu.davidea:flexible-adapter:5.0.0-rc4'
-    implementation 'eu.davidea:flexible-adapter-ui:1.0.0-b1'
-    implementation 'org.apache.commons:commons-collections4:4.1'
-    implementation 'org.greenrobot:greendao:3.2.2'
-    implementation 'com.github.yuweiguocn:GreenDaoUpgradeHelper:v2.0.2'
-    implementation 'com.jakewharton:butterknife:8.8.1'
-    implementation 'joda-time:joda-time:2.9.9'
-    implementation 'com.google.dagger:dagger-android:2.14.1'
-    implementation 'com.google.dagger:dagger-android-support:2.14.1'
-    implementation 'com.aurelhubert:ahbottomnavigation:2.1.0'
+    implementation "com.android.support:support-v4:$supportVersion"
+    implementation "com.android.support:design:$supportVersion"
+    implementation "com.android.support:cardview-v7:$supportVersion"
+    implementation "com.android.support:customtabs:$supportVersion"
+    implementation "com.android.support:preference-v14:$supportVersion"
+    implementation "com.firebase:firebase-jobdispatcher:$firebaseJob"
+    implementation "org.apache.commons:commons-lang3:$apacheLang"
+    implementation "org.apache.commons:commons-collections4:$apacheCollections"
+    implementation "eu.davidea:flexible-adapter:$flexibleAdapter"
+    implementation "eu.davidea:flexible-adapter-ui:$flexibleUi"
+    implementation "org.greenrobot:greendao:$greenDao"
+    implementation "com.github.yuweiguocn:GreenDaoUpgradeHelper:$greenDaoHelper"
+    implementation "com.jakewharton:butterknife:$butterknife"
+    implementation "com.google.dagger:dagger-android-support:$dagger2"
+    implementation "com.aurelhubert:ahbottomnavigation:$ahbottom"
+    implementation "com.jakewharton.threetenabp:threetenabp:$threeTenABP"
 
-    implementation('com.crashlytics.sdk.android:crashlytics:2.8.0@aar') {
+    implementation("com.crashlytics.sdk.android:crashlytics:$crashlyticsSdk@aar") {
         transitive = true
     }
-    implementation('com.crashlytics.sdk.android:answers:1.4.1@aar') {
+    implementation("com.crashlytics.sdk.android:answers:$crashlyticsAnswers@aar") {
         transitive = true
     }
 
-    annotationProcessor 'com.google.dagger:dagger-android-processor:2.14.1'
-    annotationProcessor 'com.google.dagger:dagger-compiler:2.14.1'
-    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
+    annotationProcessor "com.google.dagger:dagger-android-processor:$dagger2"
+    annotationProcessor "com.google.dagger:dagger-compiler:$dagger2"
+    annotationProcessor "com.jakewharton:butterknife-compiler:$butterknife"
 
-    debugImplementation 'com.amitshekhar.android:debug-db:1.0.1'
-    debugImplementation 'net.zetetic:android-database-sqlcipher:3.5.9'
+    debugImplementation "com.amitshekhar.android:debug-db:$debugDb"
+    debugImplementation "net.zetetic:android-database-sqlcipher:$sqlcipher"
 
-    testImplementation 'junit:junit:4.12'
-    testImplementation 'org.mockito:mockito-core:2.13.0'
+    testImplementation "junit:junit:$junit"
+    testImplementation "org.mockito:mockito-core:$mockito"
 
-    androidTestImplementation 'com.android.support.test:runner:1.0.1'
-    androidTestImplementation 'org.mockito:mockito-android:2.13.0'
+    androidTestImplementation "com.android.support.test:runner:$testRunner"
+    androidTestImplementation "org.mockito:mockito-android:$mockito"
 }

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

@@ -4,6 +4,7 @@ import android.app.Application;
 
 import com.crashlytics.android.Crashlytics;
 import com.crashlytics.android.core.CrashlyticsCore;
+import com.jakewharton.threetenabp.AndroidThreeTen;
 
 import org.greenrobot.greendao.query.QueryBuilder;
 
@@ -28,6 +29,8 @@ public class WulkanowyApp extends Application {
     @Override
     public void onCreate() {
         super.onCreate();
+        AndroidThreeTen.init(this);
+
         applicationComponent = DaggerApplicationComponent
                 .builder()
                 .applicationModule(new ApplicationModule(this))

app/src/main/java/io/github/wulkanowy/data/Repository.java

@@ -68,6 +68,31 @@ public class Repository implements RepositoryContract {
         return sharedPref.getCurrentUserId();
     }
 
+    @Override
+    public int getStartupTab() {
+        return sharedPref.getStartupTab();
+    }
+
+    @Override
+    public int getServicesInterval() {
+        return sharedPref.getServicesInterval();
+    }
+
+    @Override
+    public boolean isServicesEnable() {
+        return sharedPref.isServicesEnable();
+    }
+
+    @Override
+    public boolean isNotifyEnable() {
+        return sharedPref.isNotifyEnable();
+    }
+
+    @Override
+    public boolean isMobileDisable() {
+        return sharedPref.isMobileDisable();
+    }
+
     @Override
     public String[] getSymbolsKeysArray() {
         return resources.getSymbolsKeysArray();

app/src/main/java/io/github/wulkanowy/data/RepositoryContract.java

@@ -21,6 +21,16 @@ public interface RepositoryContract extends ResourcesContract, AccountSyncContra
 
     long getCurrentUserId();
 
+    int getStartupTab();
+
+    boolean isServicesEnable();
+
+    boolean isNotifyEnable();
+
+    int getServicesInterval();
+
+    boolean isMobileDisable();
+
     void syncGrades() throws VulcanException, IOException, ParseException;
 
     void syncSubjects() throws VulcanException, IOException, ParseException;

app/src/main/java/io/github/wulkanowy/data/db/resources/AppResources.java

@@ -3,6 +3,8 @@ package io.github.wulkanowy.data.db.resources;
 import android.content.Context;
 import android.content.res.Resources;
 
+import com.crashlytics.android.Crashlytics;
+
 import java.io.IOException;
 import java.net.SocketTimeoutException;
 import java.net.UnknownHostException;
@@ -12,7 +14,6 @@ import javax.inject.Singleton;
 
 import io.github.wulkanowy.R;
 import io.github.wulkanowy.api.NotLoggedInErrorException;
-import io.github.wulkanowy.api.VulcanOfflineException;
 import io.github.wulkanowy.data.db.dao.entities.AttendanceLesson;
 import io.github.wulkanowy.di.annotations.ApplicationContext;
 import io.github.wulkanowy.utils.AppConstant;
@@ -42,6 +43,7 @@ public class AppResources implements ResourcesContract {
     @Override
     public String getErrorLoginMessage(Exception exception) {
         LogUtils.error(AppConstant.APP_NAME + " encountered a error", exception);
+        Crashlytics.logException(exception);
 
         if (exception instanceof CryptoException) {
             return resources.getString(R.string.encrypt_failed_text);
@@ -51,8 +53,6 @@ public class AppResources implements ResourcesContract {
             return resources.getString(R.string.generic_timeout_error);
         } else if (exception instanceof NotLoggedInErrorException || exception instanceof IOException) {
             return resources.getString(R.string.login_denied_text);
-        } else if (exception instanceof VulcanOfflineException) {
-            return resources.getString(R.string.error_host_offline);
         } else {
             return exception.getMessage();
         }
@@ -67,23 +67,23 @@ public class AppResources implements ResourcesContract {
         }
 
         if (lesson.getIsAbsenceExcused()) {
-            id =  R.string.attendance_absence_excused;
+            id = R.string.attendance_absence_excused;
         }
 
         if (lesson.getIsAbsenceUnexcused()) {
-            id =  R.string.attendance_absence_unexcused;
+            id = R.string.attendance_absence_unexcused;
         }
 
         if (lesson.getIsExemption()) {
-            id =  R.string.attendance_exemption;
+            id = R.string.attendance_exemption;
         }
 
         if (lesson.getIsExcusedLateness()) {
-            id =  R.string.attendance_excused_lateness;
+            id = R.string.attendance_excused_lateness;
         }
 
         if (lesson.getIsUnexcusedLateness()) {
-            id =  R.string.attendance_unexcused_lateness;
+            id = R.string.attendance_unexcused_lateness;
         }
 
         return resources.getString(id);

app/src/main/java/io/github/wulkanowy/data/db/shared/SharedPref.java

@@ -2,32 +2,62 @@ package io.github.wulkanowy.data.db.shared;
 
 import android.content.Context;
 import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
 
 import javax.inject.Inject;
 import javax.inject.Singleton;
 
 import io.github.wulkanowy.di.annotations.ApplicationContext;
 import io.github.wulkanowy.di.annotations.SharedPreferencesInfo;
+import io.github.wulkanowy.ui.main.settings.SettingsFragment;
 
 @Singleton
 public class SharedPref implements SharedPrefContract {
 
     private static final String SHARED_KEY_USER_ID = "USER_ID";
 
-    private final SharedPreferences sharedPreferences;
+    private final SharedPreferences appSharedPref;
+
+    private final SharedPreferences settingsSharedPref;
 
     @Inject
     SharedPref(@ApplicationContext Context context, @SharedPreferencesInfo String sharedName) {
-        sharedPreferences = context.getSharedPreferences(sharedName, Context.MODE_PRIVATE);
+        appSharedPref = context.getSharedPreferences(sharedName, Context.MODE_PRIVATE);
+        settingsSharedPref = PreferenceManager.getDefaultSharedPreferences(context);
     }
 
     @Override
     public long getCurrentUserId() {
-        return sharedPreferences.getLong(SHARED_KEY_USER_ID, 0);
+        return appSharedPref.getLong(SHARED_KEY_USER_ID, 0);
     }
 
     @Override
     public void setCurrentUserId(long userId) {
-        sharedPreferences.edit().putLong(SHARED_KEY_USER_ID, userId).apply();
+        appSharedPref.edit().putLong(SHARED_KEY_USER_ID, userId).apply();
+    }
+
+    @Override
+    public int getStartupTab() {
+        return Integer.parseInt(settingsSharedPref.getString(SettingsFragment.SHARED_KEY_START_TAB, "2"));
+    }
+
+    @Override
+    public int getServicesInterval() {
+        return Integer.parseInt(settingsSharedPref.getString(SettingsFragment.SHARED_KEY_SERVICES_INTERVAL, "60"));
+    }
+
+    @Override
+    public boolean isServicesEnable() {
+        return settingsSharedPref.getBoolean(SettingsFragment.SHARED_KEY_SERVICES_ENABLE, true);
+    }
+
+    @Override
+    public boolean isNotifyEnable() {
+        return settingsSharedPref.getBoolean(SettingsFragment.SHARED_KEY_NOTIFY_ENABLE, true);
+    }
+
+    @Override
+    public boolean isMobileDisable() {
+        return settingsSharedPref.getBoolean(SettingsFragment.SHARED_KEY_SERVICES_MOBILE_DISABLED, false);
     }
 }

app/src/main/java/io/github/wulkanowy/data/db/shared/SharedPrefContract.java

@@ -5,4 +5,14 @@ public interface SharedPrefContract {
     long getCurrentUserId();
 
     void setCurrentUserId(long userId);
+
+    int getStartupTab();
+
+    int getServicesInterval();
+
+    boolean isMobileDisable();
+
+    boolean isServicesEnable();
+
+    boolean isNotifyEnable();
 }

app/src/main/java/io/github/wulkanowy/services/GradeNotify.java

@@ -0,0 +1,36 @@
+package io.github.wulkanowy.services;
+
+import android.annotation.TargetApi;
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.content.Context;
+
+import io.github.wulkanowy.R;
+
+class GradeNotify extends NotificationService {
+
+    private static final String CHANNEL_ID = "Grade_Notify";
+
+    GradeNotify(Context context) {
+        super(context);
+    }
+
+    @Override
+    @TargetApi(26)
+    void createChannel() {
+        String channelName = getString(R.string.notify_grade_channel);
+
+        NotificationChannel notificationChannel = new NotificationChannel(CHANNEL_ID, channelName,
+                NotificationManager.IMPORTANCE_HIGH);
+        notificationChannel.enableLights(true);
+        notificationChannel.enableVibration(true);
+        notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
+        getManager().createNotificationChannel(notificationChannel);
+    }
+
+    @Override
+    String getChannelId() {
+        return CHANNEL_ID;
+    }
+}

app/src/main/java/io/github/wulkanowy/services/NotificationService.java

@@ -3,29 +3,22 @@ package io.github.wulkanowy.services;
 
 import android.annotation.TargetApi;
 import android.app.Notification;
-import android.app.NotificationChannel;
 import android.app.NotificationManager;
 import android.content.Context;
 import android.os.Build;
+import android.support.annotation.StringRes;
 import android.support.v4.app.NotificationCompat;
 
 import java.util.Random;
 
-class NotificationService {
-
-    private static final String CHANNEL_ID = "Wulkanowy_New_Grade_Channel";
-
-    private static final String CHANNEL_NAME = "New Grade Channel";
+public class NotificationService {
 
     private NotificationManager manager;
 
     private Context context;
 
-    NotificationService(Context context) {
+    public NotificationService(Context context) {
         this.context = context;
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            createChannel();
-        }
     }
 
     void notify(Notification notification) {
@@ -33,23 +26,32 @@ class NotificationService {
     }
 
     NotificationCompat.Builder notificationBuilder() {
-        return new NotificationCompat.Builder(context, CHANNEL_ID);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            createChannel();
+        }
+        return new NotificationCompat.Builder(context, getChannelId());
     }
 
-    @TargetApi(26)
-    private void createChannel() {
-        NotificationChannel notificationChannel = new NotificationChannel(CHANNEL_ID, CHANNEL_NAME,
-                NotificationManager.IMPORTANCE_HIGH);
-        notificationChannel.enableLights(true);
-        notificationChannel.enableVibration(true);
-        notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
-        getManager().createNotificationChannel(notificationChannel);
+    public void cancelAll() {
+        getManager().cancelAll();
     }
 
-    private NotificationManager getManager() {
+    NotificationManager getManager() {
         if (manager == null) {
             manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
         }
         return manager;
     }
-}
+
+    String getString(@StringRes int stringId) {
+        return context.getString(stringId);
+    }
+
+    @TargetApi(26)
+    void createChannel() {
+    }
+
+    String getChannelId() {
+        return null;
+    }
+}

app/src/main/java/io/github/wulkanowy/services/SyncJob.java

@@ -4,6 +4,7 @@ import android.app.PendingIntent;
 import android.content.Context;
 import android.support.v4.app.NotificationCompat;
 
+import com.crashlytics.android.Crashlytics;
 import com.firebase.jobdispatcher.Constraint;
 import com.firebase.jobdispatcher.FirebaseJobDispatcher;
 import com.firebase.jobdispatcher.GooglePlayDriver;
@@ -14,6 +15,7 @@ import com.firebase.jobdispatcher.RetryStrategy;
 import com.firebase.jobdispatcher.SimpleJobService;
 import com.firebase.jobdispatcher.Trigger;
 
+import java.util.ArrayList;
 import java.util.List;
 
 import javax.inject.Inject;
@@ -27,32 +29,34 @@ import io.github.wulkanowy.utils.LogUtils;
 
 public class SyncJob extends SimpleJobService {
 
-    private static final int DEFAULT_INTERVAL_START = 60 * 50;
-
-    private static final int DEFAULT_INTERVAL_END = DEFAULT_INTERVAL_START + (60 * 40);
-
     public static final String EXTRA_INTENT_KEY = "cardId";
 
-    private List<Grade> gradeList;
+    public static final String JOB_TAG = "SyncJob";
+
+    private List<Grade> gradeList = new ArrayList<>();
 
     @Inject
     RepositoryContract repository;
 
-    public static void start(Context context) {
+    public static void start(Context context, int interval, boolean useOnlyWifi) {
         FirebaseJobDispatcher dispatcher = new FirebaseJobDispatcher(new GooglePlayDriver(context));
 
         dispatcher.mustSchedule(dispatcher.newJobBuilder()
                 .setLifetime(Lifetime.FOREVER)
                 .setService(SyncJob.class)
-                .setTag("SyncJob")
+                .setTag(JOB_TAG)
                 .setRecurring(true)
-                .setTrigger(Trigger.executionWindow(DEFAULT_INTERVAL_START, DEFAULT_INTERVAL_END))
-                .setConstraints(Constraint.ON_ANY_NETWORK)
+                .setTrigger(Trigger.executionWindow(interval * 60, (interval + 10) * 60))
+                .setConstraints(useOnlyWifi ? Constraint.ON_UNMETERED_NETWORK : Constraint.ON_ANY_NETWORK)
                 .setReplaceCurrent(false)
                 .setRetryStrategy(RetryStrategy.DEFAULT_EXPONENTIAL)
                 .build());
     }
 
+    public static void stop(Context context) {
+        new FirebaseJobDispatcher(new GooglePlayDriver(context)).cancel(JOB_TAG);
+    }
+
     @Override
     public void onCreate() {
         super.onCreate();
@@ -67,23 +71,24 @@ public class SyncJob extends SimpleJobService {
 
             gradeList = repository.getNewGrades();
 
-            if (!gradeList.isEmpty()) {
+            if (!gradeList.isEmpty() && repository.isNotifyEnable()) {
                 showNotification();
             }
             return JobService.RESULT_SUCCESS;
         } catch (Exception e) {
+            Crashlytics.logException(e);
             LogUtils.error("During background synchronization an error occurred", e);
             return JobService.RESULT_FAIL_RETRY;
         }
     }
 
     private void showNotification() {
-        NotificationService service = new NotificationService(getApplicationContext());
+        GradeNotify gradeNotify = new GradeNotify(getApplicationContext());
 
-        service.notify(service.notificationBuilder()
+        gradeNotify.notify(gradeNotify.notificationBuilder()
                 .setContentTitle(getStringTitle())
                 .setContentText(getStringContent())
-                .setSmallIcon(R.drawable.ic_stat_notify)
+                .setSmallIcon(R.drawable.ic_notify_grade)
                 .setAutoCancel(true)
                 .setDefaults(NotificationCompat.DEFAULT_ALL)
                 .setPriority(NotificationCompat.PRIORITY_HIGH)

app/src/main/java/io/github/wulkanowy/ui/login/LoginActivity.java

@@ -7,6 +7,7 @@ import android.content.Intent;
 import android.os.Bundle;
 import android.support.design.widget.Snackbar;
 import android.support.design.widget.TextInputLayout;
+import android.support.v7.app.ActionBar;
 import android.view.View;
 import android.view.inputmethod.EditorInfo;
 import android.widget.ArrayAdapter;
@@ -209,6 +210,18 @@ public class LoginActivity extends BaseActivity implements LoginContract.View {
         });
     }
 
+    @Override
+    public void showActionBar(boolean show) {
+        ActionBar actionBar = getSupportActionBar();
+        if (actionBar != null) {
+            if (show) {
+                actionBar.show();
+            } else {
+                actionBar.hide();
+            }
+        }
+    }
+
     @Override
     public void onDestroy() {
         super.onDestroy();

app/src/main/java/io/github/wulkanowy/ui/login/LoginContract.java

@@ -33,6 +33,8 @@ public interface LoginContract {
 
         void hideSoftInput();
 
+        void showActionBar(boolean show);
+
     }
 
     @PerActivity

app/src/main/java/io/github/wulkanowy/ui/login/LoginPresenter.java

@@ -55,6 +55,7 @@ public class LoginPresenter extends BasePresenter<LoginContract.View>
     @Override
     public void onStartAsync() {
         if (isViewAttached()) {
+            getView().showActionBar(false);
             getView().showLoginProgress(true);
         }
     }
@@ -84,24 +85,25 @@ public class LoginPresenter extends BasePresenter<LoginContract.View>
     public void onEndAsync(boolean success, Exception exception) {
         if (success) {
             getView().openMainActivity();
+            return;
         } else if (exception instanceof BadCredentialsException) {
             getView().setErrorPassIncorrect();
             getView().showSoftInput();
-            getView().showLoginProgress(false);
         } else if (exception instanceof AccountPermissionException) {
             getView().setErrorSymbolRequired();
             getView().showSoftInput();
-            getView().showLoginProgress(false);
         } else {
             getView().onError(getRepository().getErrorLoginMessage(exception));
-            getView().showLoginProgress(false);
         }
 
+        getView().showActionBar(true);
+        getView().showLoginProgress(false);
     }
 
     @Override
     public void onCanceledAsync() {
         if (isViewAttached()) {
+            getView().showActionBar(true);
             getView().showLoginProgress(false);
         }
     }

app/src/main/java/io/github/wulkanowy/ui/main/MainActivity.java

@@ -21,13 +21,12 @@ import io.github.wulkanowy.ui.base.BaseActivity;
 import io.github.wulkanowy.ui.main.attendance.AttendanceFragment;
 import io.github.wulkanowy.ui.main.dashboard.DashboardFragment;
 import io.github.wulkanowy.ui.main.grades.GradesFragment;
+import io.github.wulkanowy.ui.main.settings.SettingsFragment;
 import io.github.wulkanowy.ui.main.timetable.TimetableFragment;
 
 public class MainActivity extends BaseActivity implements MainContract.View,
         AHBottomNavigation.OnTabSelectedListener, OnFragmentIsReadyListener {
 
-    private int initTabPosition = 0;
-
     @BindView(R.id.main_activity_nav)
     AHBottomNavigation bottomNavigation;
 
@@ -52,15 +51,10 @@ public class MainActivity extends BaseActivity implements MainContract.View,
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        initTabPosition = getIntent().getIntExtra(SyncJob.EXTRA_INTENT_KEY, initTabPosition);
-
         getActivityComponent().inject(this);
         setButterKnife(ButterKnife.bind(this));
 
-        presenter.onStart(this);
-
-        initiationViewPager();
-        initiationBottomNav();
+        presenter.onStart(this, getIntent().getIntExtra(SyncJob.EXTRA_INTENT_KEY, -1));
     }
 
     @Override
@@ -102,48 +96,44 @@ public class MainActivity extends BaseActivity implements MainContract.View,
         presenter.onFragmentIsReady();
     }
 
-    private void initiationBottomNav() {
-        bottomNavigation.addItem(new AHBottomNavigationItem(
-                getString(R.string.grades_text),
-                getResources().getDrawable(R.drawable.ic_menu_grade_26dp)
-        ));
-        bottomNavigation.addItem(new AHBottomNavigationItem(
-                getString(R.string.attendance_text),
-                getResources().getDrawable(R.drawable.ic_menu_attendance_24dp)
-        ));
-        bottomNavigation.addItem(new AHBottomNavigationItem(
-                getString(R.string.dashboard_text),
-                getResources().getDrawable(R.drawable.ic_menu_dashboard_24dp)
-        ));
-        bottomNavigation.addItem(new AHBottomNavigationItem(
-                getString(R.string.lessonplan_text),
-                getResources().getDrawable(R.drawable.ic_menu_timetable_24dp)
-        ));
-        bottomNavigation.addItem(new AHBottomNavigationItem(
-                getString(R.string.settings_text),
-                getResources().getDrawable(R.drawable.ic_menu_other_24dp)
-        ));
+    @Override
+    public void initiationBottomNav(int tabPosition) {
+        bottomNavigation.addItem(new AHBottomNavigationItem(getString(R.string.grades_text),
+                R.drawable.ic_menu_grade_26dp));
+
+        bottomNavigation.addItem(new AHBottomNavigationItem(getString(R.string.attendance_text),
+                R.drawable.ic_menu_attendance_24dp));
+
+        bottomNavigation.addItem(new AHBottomNavigationItem(getString(R.string.dashboard_text),
+                R.drawable.ic_menu_dashboard_24dp));
+
+        bottomNavigation.addItem(new AHBottomNavigationItem(getString(R.string.timetable_text),
+                R.drawable.ic_menu_timetable_24dp));
+
+        bottomNavigation.addItem(new AHBottomNavigationItem(getString(R.string.settings_text),
+                R.drawable.ic_menu_other_24dp));
 
         bottomNavigation.setAccentColor(getResources().getColor(R.color.colorPrimary));
         bottomNavigation.setInactiveColor(Color.BLACK);
         bottomNavigation.setBackgroundColor(getResources().getColor(R.color.colorBackgroundBottomNav));
         bottomNavigation.setTitleState(AHBottomNavigation.TitleState.ALWAYS_SHOW);
         bottomNavigation.setOnTabSelectedListener(this);
-        bottomNavigation.setCurrentItem(initTabPosition);
+        bottomNavigation.setCurrentItem(tabPosition);
         bottomNavigation.setBehaviorTranslationEnabled(false);
     }
 
-    private void initiationViewPager() {
+    @Override
+    public void initiationViewPager(int tabPosition) {
         pagerAdapter.addFragment(new GradesFragment());
         pagerAdapter.addFragment(new AttendanceFragment());
         pagerAdapter.addFragment(new DashboardFragment());
         pagerAdapter.addFragment(new TimetableFragment());
-        pagerAdapter.addFragment(new DashboardFragment());
+        pagerAdapter.addFragment(new SettingsFragment());
 
         viewPager.setPagingEnabled(false);
         viewPager.setAdapter(pagerAdapter);
         viewPager.setOffscreenPageLimit(4);
-        viewPager.setCurrentItem(initTabPosition, false);
+        viewPager.setCurrentItem(tabPosition, false);
     }
 
     @Override

app/src/main/java/io/github/wulkanowy/ui/main/MainContract.java

@@ -14,11 +14,17 @@ public interface MainContract {
         void showActionBar();
 
         void hideActionBar();
+
+        void initiationViewPager(int tabPosition);
+
+        void initiationBottomNav(int tabPosition);
     }
 
     @PerActivity
     interface Presenter extends BaseContract.Presenter<View> {
 
+        void onStart(View view, int tabPositionIntent);
+
         void onTabSelected(int position, boolean wasSelected);
 
         void onFragmentIsReady();

app/src/main/java/io/github/wulkanowy/ui/main/MainPresenter.java

@@ -17,10 +17,21 @@ public class MainPresenter extends BasePresenter<MainContract.View>
     }
 
     @Override
-    public void onStart(MainContract.View view) {
+    public void onStart(MainContract.View view, int tabPositionIntent) {
         super.onStart(view);
         getView().showProgressBar(true);
         getView().hideActionBar();
+
+        int tabPosition;
+
+        if (tabPositionIntent != -1) {
+            tabPosition = tabPositionIntent;
+        } else {
+            tabPosition = getRepository().getStartupTab();
+        }
+
+        getView().initiationBottomNav(tabPosition);
+        getView().initiationViewPager(tabPosition);
     }
 
     @Override
@@ -32,11 +43,11 @@ public class MainPresenter extends BasePresenter<MainContract.View>
 
     @Override
     public void onFragmentIsReady() {
-        if (fragmentCount < 5) {
+        if (fragmentCount < 4) {
             fragmentCount++;
         }
 
-        if (fragmentCount == 5) {
+        if (fragmentCount == 4) {
             getView().showActionBar();
             getView().showProgressBar(false);
         }

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceContract.java

@@ -17,20 +17,16 @@ public interface AttendanceContract {
 
         void setAdapterWithTabLayout();
 
-        void setChildFragmentSelected(int position, boolean selected);
-
         boolean isMenuVisible();
     }
 
     @PerActivity
     interface Presenter extends BaseContract.Presenter<View> {
 
-        void onFragmentVisible(boolean isVisible);
-
-        void onTabSelected(int position);
-
-        void onTabUnselected(int position);
+        void onFragmentActivated(boolean isVisible);
 
         void onStart(View view, OnFragmentIsReadyListener listener);
+
+        void setRestoredPosition(int position);
     }
 }

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

@@ -20,7 +20,9 @@ import io.github.wulkanowy.ui.base.BaseFragment;
 import io.github.wulkanowy.ui.main.OnFragmentIsReadyListener;
 import io.github.wulkanowy.ui.main.TabsData;
 
-public class AttendanceFragment extends BaseFragment implements AttendanceContract.View, TabLayout.OnTabSelectedListener {
+public class AttendanceFragment extends BaseFragment implements AttendanceContract.View {
+
+    private static final String CURRENT_ITEM_KEY = "CurrentItem";
 
     @BindView(R.id.attendance_fragment_viewpager)
     ViewPager viewPager;
@@ -45,6 +47,10 @@ public class AttendanceFragment extends BaseFragment implements AttendanceContra
             component.inject(this);
             setButterKnife(ButterKnife.bind(this, view));
             presenter.onStart(this, (OnFragmentIsReadyListener) getActivity());
+
+            if (savedInstanceState != null) {
+                presenter.setRestoredPosition(savedInstanceState.getInt(CURRENT_ITEM_KEY));
+            }
         }
 
         return view;
@@ -54,25 +60,10 @@ public class AttendanceFragment extends BaseFragment implements AttendanceContra
     public void setMenuVisibility(boolean menuVisible) {
         super.setMenuVisibility(menuVisible);
         if (presenter != null) {
-            presenter.onFragmentVisible(menuVisible);
+            presenter.onFragmentActivated(menuVisible);
         }
     }
 
-    @Override
-    public void onTabSelected(TabLayout.Tab tab) {
-        presenter.onTabSelected(tab.getPosition());
-    }
-
-    @Override
-    public void onTabUnselected(TabLayout.Tab tab) {
-        presenter.onTabUnselected(tab.getPosition());
-    }
-
-    @Override
-    public void onTabReselected(TabLayout.Tab tab) {
-        //do nothing
-    }
-
     @Override
     public void setTabDataToAdapter(TabsData tabsData) {
         pagerAdapter.setTabsData(tabsData);
@@ -81,14 +72,7 @@ public class AttendanceFragment extends BaseFragment implements AttendanceContra
     @Override
     public void setAdapterWithTabLayout() {
         viewPager.setAdapter(pagerAdapter);
-
         tabLayout.setupWithViewPager(viewPager);
-        tabLayout.addOnTabSelectedListener(this);
-    }
-
-    @Override
-    public void setChildFragmentSelected(int position, boolean selected) {
-        ((AttendanceTabFragment) pagerAdapter.getItem(position)).setSelected(selected);
     }
 
     @Override
@@ -109,6 +93,12 @@ public class AttendanceFragment extends BaseFragment implements AttendanceContra
         }
     }
 
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        outState.putInt(CURRENT_ITEM_KEY, viewPager.getCurrentItem());
+        super.onSaveInstanceState(outState);
+    }
+
     @Override
     public void onDestroyView() {
         presenter.onDestroy();

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceHeaderItem.java

@@ -19,6 +19,7 @@ import butterknife.BindView;
 import butterknife.ButterKnife;
 import eu.davidea.flexibleadapter.FlexibleAdapter;
 import eu.davidea.flexibleadapter.items.AbstractExpandableHeaderItem;
+import eu.davidea.flexibleadapter.items.IFlexible;
 import eu.davidea.viewholders.ExpandableViewHolder;
 import io.github.wulkanowy.R;
 import io.github.wulkanowy.data.db.dao.entities.Day;
@@ -58,12 +59,13 @@ public class AttendanceHeaderItem
     }
 
     @Override
-    public HeaderViewHolder createViewHolder(View view, FlexibleAdapter adapter) {
+    public HeaderViewHolder createViewHolder(View view, FlexibleAdapter<IFlexible> adapter) {
         return new HeaderViewHolder(view, adapter);
     }
 
     @Override
-    public void bindViewHolder(FlexibleAdapter adapter, HeaderViewHolder holder, int position, List payloads) {
+    public void bindViewHolder(FlexibleAdapter<IFlexible> adapter, HeaderViewHolder holder,
+                               int position, List<Object> payloads) {
         holder.onBind(day, getSubItems());
     }
 

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

@@ -24,7 +24,7 @@ public class AttendancePresenter extends BasePresenter<AttendanceContract.View>
 
     private OnFragmentIsReadyListener listener;
 
-    private int positionToScroll;
+    private int positionToScroll = 0;
 
     private boolean isFirstSight = false;
 
@@ -45,7 +45,10 @@ public class AttendancePresenter extends BasePresenter<AttendanceContract.View>
         if (dates.isEmpty()) {
             dates = TimeUtils.getMondaysFromCurrentSchoolYear();
         }
-        positionToScroll = dates.indexOf(TimeUtils.getDateOfCurrentMonday(true));
+
+        if (positionToScroll == 0) {
+            positionToScroll = dates.indexOf(TimeUtils.getDateOfCurrentMonday(true));
+        }
 
         if (!isFirstSight) {
             isFirstSight = true;
@@ -57,22 +60,12 @@ public class AttendancePresenter extends BasePresenter<AttendanceContract.View>
     }
 
     @Override
-    public void onFragmentVisible(boolean isVisible) {
+    public void onFragmentActivated(boolean isVisible) {
         if (isVisible) {
             getView().setActivityTitle();
         }
     }
 
-    @Override
-    public void onTabSelected(int position) {
-        getView().setChildFragmentSelected(position, true);
-    }
-
-    @Override
-    public void onTabUnselected(int position) {
-        getView().setChildFragmentSelected(position, false);
-    }
-
     @Override
     public void onDoInBackgroundLoading() throws Exception {
         for (String date : dates) {
@@ -97,6 +90,11 @@ public class AttendancePresenter extends BasePresenter<AttendanceContract.View>
         }
     }
 
+    @Override
+    public void setRestoredPosition(int position) {
+        this.positionToScroll = position;
+    }
+
     @Override
     public void onDestroy() {
         isFirstSight = false;

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceSubItem.java

@@ -16,6 +16,7 @@ import butterknife.BindView;
 import butterknife.ButterKnife;
 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.dao.entities.AttendanceLesson;
@@ -60,12 +61,13 @@ class AttendanceSubItem
     }
 
     @Override
-    public AttendanceSubItem.SubItemViewHolder createViewHolder(View view, FlexibleAdapter adapter) {
-        return new AttendanceSubItem.SubItemViewHolder(view, adapter);
+    public SubItemViewHolder createViewHolder(View view, FlexibleAdapter<IFlexible> adapter) {
+        return new SubItemViewHolder(view, adapter);
     }
 
     @Override
-    public void bindViewHolder(FlexibleAdapter adapter, AttendanceSubItem.SubItemViewHolder holder, int position, List payloads) {
+    public void bindViewHolder(FlexibleAdapter<IFlexible> adapter, SubItemViewHolder holder,
+                               int position, List<Object> payloads) {
         holder.onBind(lesson);
     }
 

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceTabContract.java

@@ -21,12 +21,10 @@ public interface AttendanceTabContract {
 
     interface Presenter extends BaseContract.Presenter<AttendanceTabContract.View> {
 
-        void onFragmentSelected(boolean isSelected);
+        void onFragmentActivated(boolean isSelected);
 
         void setArgumentDate(String date);
 
-        void onStart(AttendanceTabContract.View view, boolean isPrimary);
-
         void onRefresh();
     }
 }

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceTabFragment.java

@@ -27,12 +27,6 @@ public class AttendanceTabFragment extends BaseFragment implements AttendanceTab
 
     private static final String ARGUMENT_KEY = "date";
 
-    private static final String SAVED_KEY = "isSelected";
-
-    private boolean isPrimary = false;
-
-    private boolean isSelected = false;
-
     @BindView(R.id.attendance_tab_fragment_recycler)
     RecyclerView recyclerView;
 
@@ -51,6 +45,8 @@ public class AttendanceTabFragment extends BaseFragment implements AttendanceTab
     @Inject
     FlexibleAdapter<AttendanceHeaderItem> adapter;
 
+    private boolean isFragmentVisible = false;
+
     public static AttendanceTabFragment newInstance(String date) {
         AttendanceTabFragment fragmentTab = new AttendanceTabFragment();
 
@@ -61,15 +57,6 @@ public class AttendanceTabFragment extends BaseFragment implements AttendanceTab
         return fragmentTab;
     }
 
-    @Override
-    public void onCreate(@Nullable Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
-        if (savedInstanceState != null) {
-            isSelected = savedInstanceState.getBoolean(SAVED_KEY, isSelected);
-        }
-    }
-
     @Nullable
     @Override
     public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
@@ -84,7 +71,8 @@ public class AttendanceTabFragment extends BaseFragment implements AttendanceTab
                 presenter.setArgumentDate(getArguments().getString(ARGUMENT_KEY));
             }
 
-            presenter.onStart(this, isPrimary);
+            presenter.onStart(this);
+            presenter.onFragmentActivated(isFragmentVisible);
         }
         return view;
     }
@@ -111,10 +99,9 @@ public class AttendanceTabFragment extends BaseFragment implements AttendanceTab
     @Override
     public void setMenuVisibility(boolean menuVisible) {
         super.setMenuVisibility(menuVisible);
-        if (presenter != null && getView() != null) {
-            presenter.onFragmentSelected(isSelected);
-        } else if (isSelected) {
-            isPrimary = true;
+        isFragmentVisible = menuVisible;
+        if (presenter != null) {
+            presenter.onFragmentActivated(menuVisible);
         }
     }
 
@@ -143,10 +130,6 @@ public class AttendanceTabFragment extends BaseFragment implements AttendanceTab
         noItemView.setVisibility(show ? View.VISIBLE : View.INVISIBLE);
     }
 
-    public void setSelected(boolean selected) {
-        isSelected = selected;
-    }
-
     @Override
     public void onError(String message) {
         if (getActivity() != null) {
@@ -155,15 +138,8 @@ public class AttendanceTabFragment extends BaseFragment implements AttendanceTab
         }
     }
 
-    @Override
-    public void onSaveInstanceState(@NonNull Bundle outState) {
-        outState.putBoolean(SAVED_KEY, isSelected);
-        super.onSaveInstanceState(outState);
-    }
-
     @Override
     public void onDestroyView() {
-        isPrimary = false;
         presenter.onDestroy();
         super.onDestroyView();
     }

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceTabPresenter.java

@@ -33,21 +33,22 @@ public class AttendanceTabPresenter extends BasePresenter<AttendanceTabContract.
     }
 
     @Override
-    public void onStart(AttendanceTabContract.View view, boolean isPrimary) {
+    public void onStart(AttendanceTabContract.View view) {
         super.onStart(view);
         getView().showProgressBar(true);
         getView().showNoItem(false);
-        onFragmentSelected(isPrimary);
     }
 
     @Override
-    public void onFragmentSelected(boolean isSelected) {
-        if (!isFirstSight && isSelected) {
+    public void onFragmentActivated(boolean isSelected) {
+        if (!isFirstSight && isSelected && isViewAttached()) {
             isFirstSight = true;
 
             loadingTask = new AbstractTask();
             loadingTask.setOnFirstLoadingListener(this);
             loadingTask.execute();
+        } else if (!isSelected) {
+            cancelAsyncTasks();
         }
     }
 
@@ -157,10 +158,7 @@ public class AttendanceTabPresenter extends BasePresenter<AttendanceTabContract.
         getRepository().syncAttendance(date);
     }
 
-    @Override
-    public void onDestroy() {
-        isFirstSight = false;
-
+    private void cancelAsyncTasks() {
         if (refreshTask != null) {
             refreshTask.cancel(true);
             refreshTask = null;
@@ -169,6 +167,12 @@ public class AttendanceTabPresenter extends BasePresenter<AttendanceTabContract.
             loadingTask.cancel(true);
             loadingTask = null;
         }
+    }
+
+    @Override
+    public void onDestroy() {
+        cancelAsyncTasks();
+        isFirstSight = false;
         super.onDestroy();
     }
 }

app/src/main/java/io/github/wulkanowy/ui/main/grades/GradeHeaderItem.java

@@ -95,6 +95,16 @@ public class GradeHeaderItem
                     ? View.INVISIBLE : View.VISIBLE);
         }
 
+        @Override
+        public void onClick(View view) {
+            super.onClick(view);
+            if (subjectName.getLineCount() == 1) {
+                subjectName.setMaxLines(3);
+            } else {
+                subjectName.setMaxLines(1);
+            }
+        }
+
         private boolean isSubItemsReadAndSaveAlertView(List<GradesSubItem> subItems) {
             boolean isRead = true;
 

app/src/main/java/io/github/wulkanowy/ui/main/settings/SettingsFragment.java

@@ -0,0 +1,70 @@
+package io.github.wulkanowy.ui.main.settings;
+
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.support.v7.preference.PreferenceFragmentCompat;
+
+import io.github.wulkanowy.R;
+import io.github.wulkanowy.services.SyncJob;
+
+public class SettingsFragment extends PreferenceFragmentCompat
+        implements SharedPreferences.OnSharedPreferenceChangeListener {
+
+    public static final String SHARED_KEY_START_TAB = "startup_tab";
+
+    public static final String SHARED_KEY_SERVICES_ENABLE = "services_enable";
+
+    public static final String SHARED_KEY_NOTIFY_ENABLE = "notify_enable";
+
+    public static final String SHARED_KEY_SERVICES_INTERVAL = "services_interval";
+
+    public static final String SHARED_KEY_SERVICES_MOBILE_DISABLED = "services_disable_mobile";
+
+    @Override
+    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
+        addPreferencesFromResource(R.xml.preferences);
+    }
+
+    @Override
+    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
+        if (key.equals(SHARED_KEY_SERVICES_ENABLE) || key.equals(SHARED_KEY_SERVICES_INTERVAL)
+                || key.equals(SHARED_KEY_SERVICES_MOBILE_DISABLED)) {
+            launchServices(sharedPreferences.getBoolean(SHARED_KEY_SERVICES_ENABLE, true),
+                    sharedPreferences);
+        }
+    }
+
+    private void launchServices(boolean start, SharedPreferences sharedPref) {
+        if (start) {
+            int newInterval = Integer.parseInt(sharedPref.getString(SHARED_KEY_SERVICES_INTERVAL, "60"));
+            boolean useOnlyWifi = sharedPref.getBoolean(SHARED_KEY_SERVICES_MOBILE_DISABLED, false);
+
+            SyncJob.stop(getContext());
+            SyncJob.start(getContext(), newInterval, useOnlyWifi);
+        } else {
+            SyncJob.stop(getContext());
+        }
+    }
+
+    @Override
+    public void setMenuVisibility(boolean menuVisible) {
+        super.setMenuVisibility(menuVisible);
+        if (menuVisible) {
+            getActivity().setTitle(R.string.settings_text);
+        }
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        getPreferenceScreen().getSharedPreferences()
+                .registerOnSharedPreferenceChangeListener(this);
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        getPreferenceScreen().getSharedPreferences()
+                .unregisterOnSharedPreferenceChangeListener(this);
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/main/timetable/TimetableContract.java

@@ -17,20 +17,16 @@ public interface TimetableContract {
 
         void setAdapterWithTabLayout();
 
-        void setChildFragmentSelected(int position, boolean selected);
-
         boolean isMenuVisible();
     }
 
     @PerActivity
     interface Presenter extends BaseContract.Presenter<View> {
 
-        void onFragmentVisible(boolean isVisible);
-
-        void onTabSelected(int position);
-
-        void onTabUnselected(int position);
+        void onFragmentActivated(boolean isVisible);
 
         void onStart(View view, OnFragmentIsReadyListener listener);
+
+        void setRestoredPosition(int position);
     }
 }

app/src/main/java/io/github/wulkanowy/ui/main/timetable/TimetableFragment.java

@@ -20,7 +20,9 @@ import io.github.wulkanowy.ui.base.BaseFragment;
 import io.github.wulkanowy.ui.main.OnFragmentIsReadyListener;
 import io.github.wulkanowy.ui.main.TabsData;
 
-public class TimetableFragment extends BaseFragment implements TimetableContract.View, TabLayout.OnTabSelectedListener {
+public class TimetableFragment extends BaseFragment implements TimetableContract.View {
+
+    private static final String CURRENT_ITEM_KEY = "CurrentItem";
 
     @BindView(R.id.timetable_fragment_viewpager)
     ViewPager viewPager;
@@ -44,6 +46,10 @@ public class TimetableFragment extends BaseFragment implements TimetableContract
             component.inject(this);
             setButterKnife(ButterKnife.bind(this, view));
             presenter.onStart(this, (OnFragmentIsReadyListener) getActivity());
+
+            if (savedInstanceState != null) {
+                presenter.setRestoredPosition(savedInstanceState.getInt(CURRENT_ITEM_KEY));
+            }
         }
         return view;
     }
@@ -52,25 +58,10 @@ public class TimetableFragment extends BaseFragment implements TimetableContract
     public void setMenuVisibility(boolean menuVisible) {
         super.setMenuVisibility(menuVisible);
         if (presenter != null) {
-            presenter.onFragmentVisible(menuVisible);
+            presenter.onFragmentActivated(menuVisible);
         }
     }
 
-    @Override
-    public void onTabSelected(TabLayout.Tab tab) {
-        presenter.onTabSelected(tab.getPosition());
-    }
-
-    @Override
-    public void onTabUnselected(TabLayout.Tab tab) {
-        presenter.onTabUnselected(tab.getPosition());
-    }
-
-    @Override
-    public void onTabReselected(TabLayout.Tab tab) {
-        //do nothing
-    }
-
     @Override
     public void setTabDataToAdapter(TabsData tabsData) {
         pagerAdapter.setTabsData(tabsData);
@@ -79,14 +70,7 @@ public class TimetableFragment extends BaseFragment implements TimetableContract
     @Override
     public void setAdapterWithTabLayout() {
         viewPager.setAdapter(pagerAdapter);
-
         tabLayout.setupWithViewPager(viewPager);
-        tabLayout.addOnTabSelectedListener(this);
-    }
-
-    @Override
-    public void setChildFragmentSelected(int position, boolean selected) {
-        ((TimetableTabFragment) pagerAdapter.getItem(position)).setSelected(selected);
     }
 
     @Override
@@ -96,7 +80,7 @@ public class TimetableFragment extends BaseFragment implements TimetableContract
 
     @Override
     public void setActivityTitle() {
-        setTitle(getString(R.string.lessonplan_text));
+        setTitle(getString(R.string.timetable_text));
     }
 
     @Override
@@ -107,6 +91,12 @@ public class TimetableFragment extends BaseFragment implements TimetableContract
         }
     }
 
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        outState.putInt(CURRENT_ITEM_KEY, viewPager.getCurrentItem());
+        super.onSaveInstanceState(outState);
+    }
+
     @Override
     public void onDestroyView() {
         presenter.onDestroy();

app/src/main/java/io/github/wulkanowy/ui/main/timetable/TimetableHeaderItem.java

@@ -19,6 +19,7 @@ import butterknife.BindView;
 import butterknife.ButterKnife;
 import eu.davidea.flexibleadapter.FlexibleAdapter;
 import eu.davidea.flexibleadapter.items.AbstractExpandableHeaderItem;
+import eu.davidea.flexibleadapter.items.IFlexible;
 import eu.davidea.viewholders.ExpandableViewHolder;
 import io.github.wulkanowy.R;
 import io.github.wulkanowy.data.db.dao.entities.Day;
@@ -58,12 +59,13 @@ public class TimetableHeaderItem
     }
 
     @Override
-    public HeaderViewHolder createViewHolder(View view, FlexibleAdapter adapter) {
+    public HeaderViewHolder createViewHolder(View view, FlexibleAdapter<IFlexible> adapter) {
         return new HeaderViewHolder(view, adapter);
     }
 
     @Override
-    public void bindViewHolder(FlexibleAdapter adapter, HeaderViewHolder holder, int position, List payloads) {
+    public void bindViewHolder(FlexibleAdapter<IFlexible> adapter, HeaderViewHolder holder,
+                               int position, List<Object> payloads) {
         holder.onBind(day, getSubItems());
     }
 

app/src/main/java/io/github/wulkanowy/ui/main/timetable/TimetablePresenter.java

@@ -24,7 +24,7 @@ public class TimetablePresenter extends BasePresenter<TimetableContract.View>
 
     private OnFragmentIsReadyListener listener;
 
-    private int positionToScroll;
+    private int positionToScroll = 0;
 
     private boolean isFirstSight = false;
 
@@ -45,7 +45,10 @@ public class TimetablePresenter extends BasePresenter<TimetableContract.View>
         if (dates.isEmpty()) {
             dates = TimeUtils.getMondaysFromCurrentSchoolYear();
         }
-        positionToScroll = dates.indexOf(TimeUtils.getDateOfCurrentMonday(true));
+
+        if (positionToScroll == 0) {
+            positionToScroll = dates.indexOf(TimeUtils.getDateOfCurrentMonday(true));
+        }
 
         if (!isFirstSight) {
             isFirstSight = true;
@@ -57,22 +60,12 @@ public class TimetablePresenter extends BasePresenter<TimetableContract.View>
     }
 
     @Override
-    public void onFragmentVisible(boolean isVisible) {
+    public void onFragmentActivated(boolean isVisible) {
         if (isVisible) {
             getView().setActivityTitle();
         }
     }
 
-    @Override
-    public void onTabSelected(int position) {
-        getView().setChildFragmentSelected(position, true);
-    }
-
-    @Override
-    public void onTabUnselected(int position) {
-        getView().setChildFragmentSelected(position, false);
-    }
-
     @Override
     public void onDoInBackgroundLoading() throws Exception {
         for (String date : dates) {
@@ -84,7 +77,6 @@ public class TimetablePresenter extends BasePresenter<TimetableContract.View>
     @Override
     public void onCanceledLoadingAsync() {
         //do nothing
-
     }
 
     @Override
@@ -97,6 +89,11 @@ public class TimetablePresenter extends BasePresenter<TimetableContract.View>
         }
     }
 
+    @Override
+    public void setRestoredPosition(int position) {
+        this.positionToScroll = position;
+    }
+
     @Override
     public void onDestroy() {
         isFirstSight = false;

app/src/main/java/io/github/wulkanowy/ui/main/timetable/TimetableSubItem.java

@@ -17,6 +17,7 @@ import butterknife.BindView;
 import butterknife.ButterKnife;
 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.dao.entities.TimetableLesson;
@@ -27,7 +28,7 @@ public class TimetableSubItem
 
     private TimetableLesson lesson;
 
-    public TimetableSubItem(TimetableHeaderItem header, TimetableLesson lesson) {
+    TimetableSubItem(TimetableHeaderItem header, TimetableLesson lesson) {
         super(header);
         this.lesson = lesson;
     }
@@ -62,12 +63,13 @@ public class TimetableSubItem
     }
 
     @Override
-    public SubItemViewHolder createViewHolder(View view, FlexibleAdapter adapter) {
+    public SubItemViewHolder createViewHolder(View view, FlexibleAdapter<IFlexible> adapter) {
         return new SubItemViewHolder(view, adapter);
     }
 
     @Override
-    public void bindViewHolder(FlexibleAdapter adapter, SubItemViewHolder holder, int position, List payloads) {
+    public void bindViewHolder(FlexibleAdapter<IFlexible> adapter, SubItemViewHolder holder,
+                               int position, List<Object> payloads) {
         holder.onBind(lesson);
     }
 

app/src/main/java/io/github/wulkanowy/ui/main/timetable/TimetableTabContract.java

@@ -23,12 +23,10 @@ public interface TimetableTabContract {
 
     interface Presenter extends BaseContract.Presenter<View> {
 
-        void onFragmentSelected(boolean isSelected);
+        void onFragmentActivated(boolean isSelected);
 
         void setArgumentDate(String date);
 
-        void onStart(View view, boolean isPrimary);
-
         void onRefresh();
     }
 }

app/src/main/java/io/github/wulkanowy/ui/main/timetable/TimetableTabFragment.java

@@ -28,12 +28,6 @@ public class TimetableTabFragment extends BaseFragment implements TimetableTabCo
 
     private static final String ARGUMENT_KEY = "date";
 
-    private static final String SAVED_KEY = "isSelected";
-
-    private boolean isPrimary = false;
-
-    private boolean isSelected = false;
-
     @BindView(R.id.timetable_tab_fragment_recycler)
     RecyclerView recyclerView;
 
@@ -55,6 +49,8 @@ public class TimetableTabFragment extends BaseFragment implements TimetableTabCo
     @Inject
     FlexibleAdapter<TimetableHeaderItem> adapter;
 
+    private boolean isFragmentVisible = false;
+
     public static TimetableTabFragment newInstance(String date) {
         TimetableTabFragment fragmentTab = new TimetableTabFragment();
 
@@ -65,14 +61,6 @@ public class TimetableTabFragment extends BaseFragment implements TimetableTabCo
         return fragmentTab;
     }
 
-    @Override
-    public void onCreate(@Nullable Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        if (savedInstanceState != null) {
-            isSelected = savedInstanceState.getBoolean(SAVED_KEY, isSelected);
-        }
-    }
-
     @Nullable
     @Override
     public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
@@ -86,8 +74,8 @@ public class TimetableTabFragment extends BaseFragment implements TimetableTabCo
             if (getArguments() != null) {
                 presenter.setArgumentDate(getArguments().getString(ARGUMENT_KEY));
             }
-
-            presenter.onStart(this, isPrimary);
+            presenter.onStart(this);
+            presenter.onFragmentActivated(isFragmentVisible);
         }
         return view;
     }
@@ -114,10 +102,9 @@ public class TimetableTabFragment extends BaseFragment implements TimetableTabCo
     @Override
     public void setMenuVisibility(boolean menuVisible) {
         super.setMenuVisibility(menuVisible);
-        if (presenter != null && getView() != null) {
-            presenter.onFragmentSelected(isSelected);
-        } else if (isSelected) {
-            isPrimary = true;
+        isFragmentVisible = menuVisible;
+        if (presenter != null) {
+            presenter.onFragmentActivated(menuVisible);
         }
     }
 
@@ -151,10 +138,6 @@ public class TimetableTabFragment extends BaseFragment implements TimetableTabCo
         noItemView.setVisibility(show ? View.VISIBLE : View.INVISIBLE);
     }
 
-    public void setSelected(boolean selected) {
-        isSelected = selected;
-    }
-
     @Override
     public void onError(String message) {
         if (getActivity() != null) {
@@ -163,15 +146,8 @@ public class TimetableTabFragment extends BaseFragment implements TimetableTabCo
         }
     }
 
-    @Override
-    public void onSaveInstanceState(@NonNull Bundle outState) {
-        outState.putBoolean(SAVED_KEY, isSelected);
-        super.onSaveInstanceState(outState);
-    }
-
     @Override
     public void onDestroyView() {
-        isPrimary = false;
         presenter.onDestroy();
         super.onDestroyView();
     }

app/src/main/java/io/github/wulkanowy/ui/main/timetable/TimetableTabPresenter.java

@@ -36,21 +36,22 @@ public class TimetableTabPresenter extends BasePresenter<TimetableTabContract.Vi
     }
 
     @Override
-    public void onStart(TimetableTabContract.View view, boolean isPrimary) {
+    public void onStart(TimetableTabContract.View view) {
         super.onStart(view);
         getView().showProgressBar(true);
         getView().showNoItem(false);
-        onFragmentSelected(isPrimary);
     }
 
     @Override
-    public void onFragmentSelected(boolean isSelected) {
-        if (!isFirstSight && isSelected) {
+    public void onFragmentActivated(boolean isSelected) {
+        if (!isFirstSight && isSelected && isViewAttached()) {
             isFirstSight = true;
 
             loadingTask = new AbstractTask();
             loadingTask.setOnFirstLoadingListener(this);
             loadingTask.execute();
+        } else if (!isSelected) {
+            cancelAsyncTasks();
         }
     }
 
@@ -161,10 +162,7 @@ public class TimetableTabPresenter extends BasePresenter<TimetableTabContract.Vi
         getRepository().syncTimetable(date);
     }
 
-    @Override
-    public void onDestroy() {
-        isFirstSight = false;
-
+    private void cancelAsyncTasks() {
         if (refreshTask != null) {
             refreshTask.cancel(true);
             refreshTask = null;
@@ -173,6 +171,12 @@ public class TimetableTabPresenter extends BasePresenter<TimetableTabContract.Vi
             loadingTask.cancel(true);
             loadingTask = null;
         }
+    }
+
+    @Override
+    public void onDestroy() {
+        isFirstSight = false;
+        cancelAsyncTasks();
         super.onDestroy();
     }
 }

app/src/main/java/io/github/wulkanowy/ui/splash/SplashActivity.java

@@ -5,6 +5,7 @@ import android.os.Bundle;
 import javax.inject.Inject;
 
 import butterknife.ButterKnife;
+import io.github.wulkanowy.services.NotificationService;
 import io.github.wulkanowy.services.SyncJob;
 import io.github.wulkanowy.ui.base.BaseActivity;
 import io.github.wulkanowy.ui.login.LoginActivity;
@@ -44,7 +45,12 @@ public class SplashActivity extends BaseActivity implements SplashContract.View
     }
 
     @Override
-    public void startSyncService() {
-        SyncJob.start(getApplicationContext());
+    public void startSyncService(int interval, boolean useOnlyWifi) {
+        SyncJob.start(getApplicationContext(), interval, useOnlyWifi);
+    }
+
+    @Override
+    public void cancelNotifications() {
+        new NotificationService(getApplicationContext()).cancelAll();
     }
 }

app/src/main/java/io/github/wulkanowy/ui/splash/SplashContract.java

@@ -12,7 +12,9 @@ public interface SplashContract {
 
         void openMainActivity();
 
-        void startSyncService();
+        void startSyncService(int interval, boolean useOnlyWifi);
+
+        void cancelNotifications();
     }
 
     @PerActivity

app/src/main/java/io/github/wulkanowy/ui/splash/SplashPresenter.java

@@ -18,7 +18,12 @@ public class SplashPresenter extends BasePresenter<SplashContract.View>
     @Override
     public void onStart(@NonNull SplashContract.View activity) {
         super.onStart(activity);
-        getView().startSyncService();
+        getView().cancelNotifications();
+
+        if (getRepository().isServicesEnable()) {
+            getView().startSyncService(getRepository().getServicesInterval(),
+                    getRepository().isMobileDisable());
+        }
 
         if (getRepository().getCurrentUserId() == 0) {
             getView().openLoginActivity();

app/src/main/java/io/github/wulkanowy/utils/TimeUtils.java

@@ -1,8 +1,8 @@
 package io.github.wulkanowy.utils;
 
-import org.joda.time.DateTime;
-import org.joda.time.DateTimeConstants;
-import org.joda.time.LocalDate;
+import org.threeten.bp.DayOfWeek;
+import org.threeten.bp.LocalDate;
+import org.threeten.bp.format.DateTimeFormatter;
 
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
@@ -13,14 +13,14 @@ import java.util.List;
 import java.util.Locale;
 import java.util.TimeZone;
 
-import static io.github.wulkanowy.utils.AppConstant.DATE_PATTERN;
-
 public final class TimeUtils {
 
     private static final long TICKS_AT_EPOCH = 621355968000000000L;
 
     private static final long TICKS_PER_MILLISECOND = 10000;
 
+    private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern(AppConstant.DATE_PATTERN);
+
     private TimeUtils() {
         throw new IllegalStateException("Utility class");
     }
@@ -33,7 +33,7 @@ public final class TimeUtils {
     }
 
     public static long getNetTicks(String dateString) throws ParseException {
-        return getNetTicks(dateString, DATE_PATTERN);
+        return getNetTicks(dateString, AppConstant.DATE_PATTERN);
     }
 
     public static long getNetTicks(String dateString, String dateFormat) throws ParseException {
@@ -49,12 +49,12 @@ public final class TimeUtils {
     }
 
     public static List<String> getMondaysFromCurrentSchoolYear() {
-        LocalDate startDate = new LocalDate(getCurrentSchoolYear(), 9, 1);
-        LocalDate endDate = new LocalDate(getCurrentSchoolYear() + 1, 8, 31);
+        LocalDate startDate = LocalDate.of(getCurrentSchoolYear(), 9, 1);
+        LocalDate endDate = LocalDate.of(getCurrentSchoolYear() + 1, 8, 31);
 
         List<String> dateList = new ArrayList<>();
 
-        LocalDate thisMonday = startDate.withDayOfWeek(DateTimeConstants.MONDAY);
+        LocalDate thisMonday = startDate.with(DayOfWeek.MONDAY);
 
         if (startDate.isAfter(thisMonday)) {
             startDate = thisMonday.plusWeeks(1);
@@ -63,27 +63,27 @@ public final class TimeUtils {
         }
 
         while (startDate.isBefore(endDate)) {
-            dateList.add(startDate.toString(DATE_PATTERN));
+            dateList.add(startDate.format(formatter));
             startDate = startDate.plusWeeks(1);
         }
         return dateList;
     }
 
     public static int getCurrentSchoolYear() {
-        DateTime dateTime = new DateTime();
-        return dateTime.getMonthOfYear() <= 8 ? dateTime.getYear() - 1 : dateTime.getYear();
+        LocalDate localDate = LocalDate.now();
+        return localDate.getMonthValue() <= 8 ? localDate.getYear() - 1 : localDate.getYear();
     }
 
     public static String getDateOfCurrentMonday(boolean normalize) {
-        DateTime currentDate = new DateTime();
+        LocalDate currentDate = LocalDate.now();
 
-        if (currentDate.getDayOfWeek() == DateTimeConstants.SATURDAY && normalize) {
+        if (currentDate.getDayOfWeek() == DayOfWeek.SATURDAY && normalize) {
             currentDate = currentDate.plusDays(2);
-        } else if (currentDate.getDayOfWeek() == DateTimeConstants.SUNDAY && normalize) {
+        } else if (currentDate.getDayOfWeek() == DayOfWeek.SUNDAY && normalize) {
             currentDate = currentDate.plusDays(1);
         } else {
-            currentDate = currentDate.withDayOfWeek(DateTimeConstants.MONDAY);
+            currentDate = currentDate.with(DayOfWeek.MONDAY);
         }
-        return currentDate.toString(DATE_PATTERN);
+        return currentDate.format(formatter);
     }
 }

app/src/main/res/values-pl/prefernces_array.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string-array name="services_interval_entries">
+        <item>10 minut</item>
+        <item>30 minut</item>
+        <item>1 godzinę</item>
+        <item>2 godziny</item>
+        <item>6 godzin</item>
+        <item>12 godzin</item>
+        <item>24 godzin</item>
+    </string-array>
+</resources>

app/src/main/res/values-pl/strings.xml

@@ -33,13 +33,12 @@
     <string name="dashboard_text">Dashboard</string>
     <string name="grades_text">Oceny</string>
     <string name="attendance_text">Frekwencja</string>
-    <string name="lessonplan_text">Plan lekcji</string>
+    <string name="timetable_text">Plan lekcji</string>
     <string name="settings_text">Ustawienia</string>
     <string name="activity_under_construction">Ta część aplikacji jest w budowie</string>
     <string name="fragment_no_grades">Brak ocen</string>
 
     <string name="noInternet_text">Brak połączenia z internetem</string>
-    <string name="error_host_offline">Przerwa techniczna. Spróbuj ponownie później</string>
     <string name="encrypt_failed_text">Szyfrowanie nie powiodło się. Automatyczne logowanie zostało wyłączone</string>
     <string name="version_text">Wersja %1$s</string>
     <string name="refresh_error_text">"Podczas odświeżania zawartości wystąpił błąd. "</string>
@@ -114,4 +113,15 @@
         <item quantity="few">%1$d nieobecności</item>
         <item quantity="many">%1$d nieobecności</item>
     </plurals>
+
+    <string name="pref_view">Widok</string>
+    <string name="pref_tab_list">Domyślny widok</string>
+    <string name="pref_notify">Powiadomienia</string>
+    <string name="pref_notify_switch">Pokazuj powiadomienia</string>
+    <string name="pref_services">Usługi</string>
+    <string name="pref_services_switch">Włącz odświeżanie danych w tle</string>
+    <string name="pref_services_interval">Interwał między odświeżaniem danych</string>
+    <string name="pref_services_mobile_data">Synchronizacja tylko przez WiFi</string>
+
+    <string name="notify_grade_channel">Nowe oceny</string>
 </resources>

app/src/main/res/values/prefernces_array.xml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string-array name="startup_tab_entries" translatable="false">
+        <item>@string/grades_text</item>
+        <item>@string/attendance_text</item>
+        <item>@string/dashboard_text</item>
+        <item>@string/timetable_text</item>
+    </string-array>
+    <string-array name="startup_tab_value" translatable="false">
+        <item>0</item>
+        <item>1</item>
+        <item>2</item>
+        <item>3</item>
+    </string-array>
+    <string-array name="services_interval_entries">
+        <item>10 minutes</item>
+        <item>30 minutes</item>
+        <item>1 hour</item>
+        <item>2 hours</item>
+        <item>6 hours</item>
+        <item>12 hours</item>
+        <item>24 hours</item>
+    </string-array>
+    <string-array name="services_interval_value" translatable="false">
+        <item>10</item>
+        <item>30</item>
+        <item>60</item>
+        <item>120</item>
+        <item>360</item>
+        <item>720</item>
+        <item>1440</item>
+    </string-array>
+</resources>

app/src/main/res/values/strings.xml

@@ -33,7 +33,7 @@
     <string name="dashboard_text">Dashboard</string>
     <string name="grades_text">Grades</string>
     <string name="attendance_text">Attendance</string>
-    <string name="lessonplan_text">Timetable</string>
+    <string name="timetable_text">Timetable</string>
     <string name="settings_text">Settings</string>
     <string name="activity_under_construction">This section of app is under construction.</string>
     <string name="fragment_no_grades">No grades</string>
@@ -73,7 +73,6 @@
     <string name="info_average_grades">Average: %1$.2f</string>
     <string name="info_no_average">No average</string>
     <string name="info_free_week">No lesson in this week</string>
-    <string name="error_host_offline">Technical break</string>
 
     <string name="timetable_subitem_room">Room %s</string>
 
@@ -110,4 +109,15 @@
         <item quantity="many">%1$d absences</item>
         <item quantity="other">%1$d absences</item>
     </plurals>
+
+    <string name="pref_tab_list">Default view after startup</string>
+    <string name="pref_view">View</string>
+    <string name="pref_notify">Notifications</string>
+    <string name="pref_notify_switch">Show the notifications</string>
+    <string name="pref_services">Services</string>
+    <string name="pref_services_switch">Enable background data refreshing</string>
+    <string name="pref_services_interval">Interval between data refreshing</string>
+    <string name="pref_services_mobile_data">Synchronization via WiFi only</string>
+
+    <string name="notify_grade_channel">New grades</string>
 </resources>

app/src/main/res/values/styles.xml

@@ -13,6 +13,7 @@
         <item name="titleTextColor">@android:color/primary_text_dark</item>
         <item name="subtitleTextColor">@android:color/primary_text_dark</item>
         <item name="android:colorBackground">@android:color/white</item>
+        <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item>
     </style>
 
     <style name="WulkanowyTheme.SplashTheme" parent="WulkanowyTheme">

app/src/main/res/xml/preferences.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
+    <PreferenceCategory android:title="@string/pref_view">
+        <ListPreference
+            android:defaultValue="2"
+            android:entries="@array/startup_tab_entries"
+            android:entryValues="@array/startup_tab_value"
+            android:key="startup_tab"
+            android:summary="%s"
+            android:title="@string/pref_tab_list" />
+    </PreferenceCategory>
+    <PreferenceCategory android:title="@string/pref_services">
+        <SwitchPreference
+            android:defaultValue="true"
+            android:key="services_enable"
+            android:title="@string/pref_services_switch" />
+        <ListPreference
+            android:defaultValue="60"
+            android:dependency="services_enable"
+            android:entries="@array/services_interval_entries"
+            android:entryValues="@array/services_interval_value"
+            android:key="services_interval"
+            android:summary="%s"
+            android:title="@string/pref_services_interval" />
+        <SwitchPreference
+            android:defaultValue="false"
+            android:key="services_disable_mobile"
+            android:title="@string/pref_services_mobile_data"
+            android:dependency="services_enable" />
+    </PreferenceCategory>
+    <PreferenceCategory android:title="@string/pref_notify">
+        <SwitchPreference
+            android:defaultValue="true"
+            android:dependency="services_enable"
+            android:key="notify_enable"
+            android:title="@string/pref_notify_switch" />
+    </PreferenceCategory>
+</PreferenceScreen>

build.gradle

@@ -6,10 +6,7 @@ buildscript {
         maven { url "https://plugins.gradle.org/m2/" }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
-
-        // NOTE: Do not place your application dependencies here; they belong
-        // in the individual module build.gradle files
+        classpath 'com.android.tools.build:gradle:3.1.0'
         classpath "org.sonarsource.scanner.gradle:sonarqube-gradle-plugin:2.6.1"
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.7.3'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.4.1'
@@ -29,6 +26,31 @@ subprojects {
 
 ext {
     GROUP_ID = "io.github.wulkanowy"
+
+    supportVersion = "26.1.0"
+    firebaseJob = "0.8.5"
+    apacheLang = "3.7"
+    apacheCollections = "4.1"
+    flexibleAdapter = "5.0.2"
+    flexibleUi = "1.0.0-b2"
+    greenDao = "3.2.2"
+    greenDaoHelper = "v2.0.2"
+    butterknife = "8.8.1"
+    threeTenABP = "1.0.5"
+    dagger2 = "2.15"
+    ahbottom = "2.1.0"
+    jsoup = "1.10.3"
+    gson = "2.8.2"
+
+    debugDb = "1.0.3"
+    sqlcipher = "3.5.9"
+
+    junit = "4.12"
+    mockito = "2.16.0"
+    testRunner = "1.0.1"
+
+    crashlyticsSdk = "2.9.1"
+    crashlyticsAnswers = "1.4.1"
 }
 
 allprojects {

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Thu Oct 27 17:19:04 CEST 2017
+#Tue Mar 27 02:10:44 CEST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip

jacoco.gradle

@@ -1,7 +1,11 @@
 apply plugin: "jacoco"
 
 jacoco {
-    toolVersion "0.7.4.201502262128"
+    toolVersion "0.8.1"
+}
+
+tasks.withType(Test) {
+    jacoco.includeNoLocationClasses = true
 }
 
 // run ./gradlew clean createDebugCoverageReport jacocoTestReport