[UI] Add new attendance UI module.

app/src/main/java/pl/szczodrzynski/edziennik/config/ProfileConfig.kt

@@ -30,6 +30,7 @@ class ProfileConfig(val db: AppDb, val profileId: Int, rawEntries: List<ConfigEn
     val grades by lazy { ProfileConfigGrades(this) }
     val ui by lazy { ProfileConfigUI(this) }
     val sync by lazy { ProfileConfigSync(this) }
+    val attendance by lazy { ProfileConfigAttendance(this) }
     /*
     val timetable by lazy { ConfigTimetable(this) }
     val grades by lazy { ConfigGrades(this) }*/

app/src/main/java/pl/szczodrzynski/edziennik/config/ProfileConfigAttendance.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-4-29. 
+ */
+
+package pl.szczodrzynski.edziennik.config
+
+import pl.szczodrzynski.edziennik.config.utils.get
+import pl.szczodrzynski.edziennik.config.utils.set
+
+class ProfileConfigAttendance(private val config: ProfileConfig) {
+    private var mAttendancePageSelection: Int? = null
+    var attendancePageSelection: Int
+        get() { mAttendancePageSelection = mAttendancePageSelection ?: config.values.get("attendancePageSelection", 1); return mAttendancePageSelection ?: 1 }
+        set(value) { config.set("attendancePageSelection", value); mAttendancePageSelection = value }
+
+    private var mUseSymbols: Boolean? = null
+    var useSymbols: Boolean
+        get() { mUseSymbols = mUseSymbols ?: config.values.get("useSymbols", false); return mUseSymbols ?: false }
+        set(value) { config.set("useSymbols", value); mUseSymbols = value }
+
+    private var mGroupConsecutiveDays: Boolean? = null
+    var groupConsecutiveDays: Boolean
+        get() { mGroupConsecutiveDays = mGroupConsecutiveDays ?: config.values.get("groupConsecutiveDays", true); return mGroupConsecutiveDays ?: true }
+        set(value) { config.set("groupConsecutiveDays", value); mGroupConsecutiveDays = value }
+
+    private var mShowPresenceInMonth: Boolean? = null
+    var showPresenceInMonth: Boolean
+        get() { mShowPresenceInMonth = mShowPresenceInMonth ?: config.values.get("showPresenceInMonth", false); return mShowPresenceInMonth ?: false }
+        set(value) { config.set("showPresenceInMonth", value); mShowPresenceInMonth = value }
+}

app/src/main/java/pl/szczodrzynski/edziennik/data/db/dao/AttendanceDao.kt

@@ -69,6 +69,6 @@ abstract class AttendanceDao : BaseDao<Attendance, AttendanceFull> {
     fun getByIdNow(profileId: Int, id: Long) =
             getOneNow("$QUERY WHERE attendances.profileId = $profileId AND attendanceId = $id")
 
-    @Query("UPDATE attendances SET keep = 0 WHERE profileId = :profileId AND attendanceDate > :date")
+    @Query("UPDATE attendances SET keep = 0 WHERE profileId = :profileId AND attendanceDate >= :date")
     abstract fun dontKeepAfterDate(profileId: Int, date: Date?)
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/db/dao/BaseDao.kt

@@ -116,6 +116,8 @@ interface BaseDao<T : Keepable, F : T> {
         if (forceReplace)
             replaceAll(items)
         else
-            upsertAll(items)
+            upsertAll(items, removeNotKept = false)
+
+        if (removeNotKept) removeNotKept()
     }
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/db/entity/Attendance.kt

@@ -47,15 +47,18 @@ open class Attendance(
         var addedDate: Long = System.currentTimeMillis()
 ) : Keepable() {
     companion object {
-        const val TYPE_UNKNOWN = -1
+        const val TYPE_UNKNOWN = -1         // #3f51b5
-        const val TYPE_PRESENT = 0
+        const val TYPE_PRESENT = 0          // #009688
-        const val TYPE_PRESENT_CUSTOM = 10 // count as presence AND show in the list
+        const val TYPE_PRESENT_CUSTOM = 10  // count as presence AND show in the list + custom color, fallback: #3f51b5
-        const val TYPE_ABSENT = 1
+        const val TYPE_ABSENT = 1           // #ff3d00
-        const val TYPE_ABSENT_EXCUSED = 2
+        const val TYPE_ABSENT_EXCUSED = 2   // #76ff03
-        const val TYPE_RELEASED = 3
+        const val TYPE_RELEASED = 3         // #9e9e9e
-        const val TYPE_BELATED = 4
+        const val TYPE_BELATED = 4          // #ffc107
-        const val TYPE_BELATED_EXCUSED = 5
+        const val TYPE_BELATED_EXCUSED = 5  // #ffc107
-        const val TYPE_DAY_FREE = 6
+        const val TYPE_DAY_FREE = 6         // #43a047
+
+        // attendance bar order:
+        // day_free, present, present_custom, unknown, belated_excused, belated, released, absent_excused, absent,
     }
 
     @ColumnInfo(name = "attendanceLessonTopic")
@@ -64,5 +67,5 @@ open class Attendance(
     var lessonNumber: Int? = null
 
     @Ignore
-    var showAsUnseen = false
+    var showAsUnseen: Boolean? = null
 }

app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/settings/AttendanceConfigDialog.kt

@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-5-4.
+ */
+
+package pl.szczodrzynski.edziennik.ui.dialogs.settings
+
+import android.annotation.SuppressLint
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.app.AppCompatActivity
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.MainActivity
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.databinding.AttendanceConfigDialogBinding
+import pl.szczodrzynski.edziennik.onChange
+
+class AttendanceConfigDialog(
+        val activity: AppCompatActivity,
+        private val reloadOnDismiss: Boolean = true,
+        val onShowListener: ((tag: String) -> Unit)? = null,
+        val onDismissListener: ((tag: String) -> Unit)? = null
+) {
+    companion object {
+        const val TAG = "GradesConfigDialog"
+    }
+
+    private val app by lazy { activity.application as App }
+    private val profileConfig by lazy { app.config.getFor(app.profileId).attendance }
+
+    private lateinit var b: AttendanceConfigDialogBinding
+    private lateinit var dialog: AlertDialog
+
+    init { run {
+        if (activity.isFinishing)
+            return@run
+        b = AttendanceConfigDialogBinding.inflate(activity.layoutInflater)
+        onShowListener?.invoke(TAG)
+        dialog = MaterialAlertDialogBuilder(activity)
+                .setTitle(R.string.menu_attendance_config)
+                .setView(b.root)
+                .setPositiveButton(R.string.ok) { dialog, _ -> dialog.dismiss() }
+                .setOnDismissListener {
+                    saveConfig()
+                    onDismissListener?.invoke(TAG)
+                    if (reloadOnDismiss) (activity as? MainActivity)?.reloadTarget()
+                }
+                .create()
+        initView()
+        loadConfig()
+        dialog.show()
+    }}
+
+    @SuppressLint("SetTextI18n")
+    private fun loadConfig() {
+        b.useSymbols.isChecked = profileConfig.useSymbols
+        b.groupConsecutiveDays.isChecked = profileConfig.groupConsecutiveDays
+        b.showPresenceInMonth.isChecked = profileConfig.showPresenceInMonth
+    }
+
+    private fun saveConfig() {
+        // nothing to do here, yet
+    }
+
+    private fun initView() {
+        b.useSymbols.onChange { _, isChecked ->
+            profileConfig.useSymbols = isChecked
+        }
+        b.groupConsecutiveDays.onChange { _, isChecked ->
+            profileConfig.groupConsecutiveDays = isChecked
+        }
+        b.showPresenceInMonth.onChange { _, isChecked ->
+            profileConfig.showPresenceInMonth = isChecked
+        }
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/AttendanceAdapter.java

@@ -1,135 +0,0 @@
-package pl.szczodrzynski.edziennik.ui.modules.attendance;
-
-import android.content.Context;
-import android.graphics.PorterDuff;
-import android.graphics.PorterDuffColorFilter;
-import android.os.AsyncTask;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.TextView;
-
-import androidx.annotation.NonNull;
-import androidx.recyclerview.widget.RecyclerView;
-
-import java.util.List;
-
-import pl.szczodrzynski.edziennik.App;
-import pl.szczodrzynski.edziennik.R;
-import pl.szczodrzynski.edziennik.data.db.full.AttendanceFull;
-
-import static pl.szczodrzynski.edziennik.data.db.entity.Attendance.TYPE_ABSENT;
-import static pl.szczodrzynski.edziennik.data.db.entity.Attendance.TYPE_ABSENT_EXCUSED;
-import static pl.szczodrzynski.edziennik.data.db.entity.Attendance.TYPE_BELATED;
-import static pl.szczodrzynski.edziennik.data.db.entity.Attendance.TYPE_BELATED_EXCUSED;
-import static pl.szczodrzynski.edziennik.data.db.entity.Attendance.TYPE_DAY_FREE;
-import static pl.szczodrzynski.edziennik.data.db.entity.Attendance.TYPE_PRESENT;
-import static pl.szczodrzynski.edziennik.data.db.entity.Attendance.TYPE_RELEASED;
-
-public class AttendanceAdapter extends RecyclerView.Adapter<AttendanceAdapter.ViewHolder> {
-    private Context context;
-    public List<AttendanceFull> attendanceList;
-
-    //getting the context and product list with constructor
-    public AttendanceAdapter(Context mCtx, List<AttendanceFull> noticeList) {
-        this.context = mCtx;
-        this.attendanceList = noticeList;
-    }
-
-    @NonNull
-    @Override
-    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
-        //inflating and returning our view holder
-        LayoutInflater inflater = LayoutInflater.from(context);
-        View view = inflater.inflate(R.layout.row_attendance_item, parent, false);
-        return new ViewHolder(view);
-    }
-
-    @Override
-    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
-        App app = (App) context.getApplicationContext();
-
-        AttendanceFull attendance = attendanceList.get(position);
-
-        holder.attendanceLessonTopic.setText(attendance.getLessonTopic());
-        holder.attendanceTeacher.setText(attendance.getTeacherName());
-        holder.attendanceSubject.setText(attendance.getSubjectLongName());
-        holder.attendanceDate.setText(attendance.getDate().getStringDmy());
-        holder.attendanceTime.setText(attendance.getStartTime().getStringHM());
-
-        switch (attendance.getBaseType()) {
-            case TYPE_DAY_FREE:
-                holder.attendanceType.getBackground().setColorFilter(new PorterDuffColorFilter(0xff166ee0, PorterDuff.Mode.MULTIPLY));
-                holder.attendanceType.setText(R.string.attendance_free_day);
-                break;
-            case TYPE_ABSENT:
-                holder.attendanceType.getBackground().setColorFilter(new PorterDuffColorFilter(0xfff44336, PorterDuff.Mode.MULTIPLY));
-                holder.attendanceType.setText(R.string.attendance_absent);
-                break;
-            case TYPE_ABSENT_EXCUSED:
-                holder.attendanceType.getBackground().setColorFilter(new PorterDuffColorFilter(0xffaeea00, PorterDuff.Mode.MULTIPLY));
-                holder.attendanceType.setText(R.string.attendance_absent_excused);
-                break;
-            case TYPE_BELATED:
-                holder.attendanceType.getBackground().setColorFilter(new PorterDuffColorFilter(0xffffca28, PorterDuff.Mode.MULTIPLY));
-                holder.attendanceType.setText(R.string.attendance_belated);
-                break;
-            case TYPE_BELATED_EXCUSED:
-                holder.attendanceType.getBackground().setColorFilter(new PorterDuffColorFilter(0xff4bb733, PorterDuff.Mode.MULTIPLY));
-                holder.attendanceType.setText(R.string.attendance_belated_excused);
-                break;
-            case TYPE_RELEASED:
-                holder.attendanceType.getBackground().setColorFilter(new PorterDuffColorFilter(0xff9e9e9e, PorterDuff.Mode.MULTIPLY));
-                holder.attendanceType.setText(R.string.attendance_released);
-                break;
-            case TYPE_PRESENT:
-                holder.attendanceType.getBackground().setColorFilter(new PorterDuffColorFilter(0xffffae00, PorterDuff.Mode.MULTIPLY));
-                holder.attendanceType.setText(R.string.attendance_present);
-                break;
-            default:
-                holder.attendanceType.getBackground().setColorFilter(new PorterDuffColorFilter(0xff03a9f4, PorterDuff.Mode.MULTIPLY));
-                holder.attendanceType.setText("?");
-                break;
-        }
-        holder.attendanceType.setText(attendance.getTypeShort());
-
-        if (!attendance.getSeen()) {
-            holder.attendanceLessonTopic.setBackground(context.getResources().getDrawable(R.drawable.bg_rounded_8dp));
-            holder.attendanceLessonTopic.getBackground().setColorFilter(new PorterDuffColorFilter(0x692196f3, PorterDuff.Mode.MULTIPLY));
-            attendance.setSeen(true);
-            AsyncTask.execute(() -> {
-                App.db.metadataDao().setSeen(App.Companion.getProfileId(), attendance, true);
-                //Intent i = new Intent("android.intent.action.MAIN").putExtra(MainActivity.ACTION_UPDATE_BADGES, "yes, sure");
-                //context.sendBroadcast(i);
-            });
-        }
-        else {
-            holder.attendanceLessonTopic.setBackground(null);
-        }
-    }
-
-    @Override
-    public int getItemCount() {
-        return attendanceList.size();
-    }
-
-    class ViewHolder extends RecyclerView.ViewHolder {
-
-        TextView attendanceType;
-        TextView attendanceLessonTopic;
-        TextView attendanceSubject;
-        TextView attendanceTeacher;
-        TextView attendanceDate;
-        TextView attendanceTime;
-
-        ViewHolder(View itemView) {
-            super(itemView);
-            attendanceType = itemView.findViewById(R.id.attendanceType);
-            attendanceLessonTopic = itemView.findViewById(R.id.attendanceLessonTopic);
-            attendanceSubject = itemView.findViewById(R.id.attendanceSubject);
-            attendanceTeacher = itemView.findViewById(R.id.attendanceTeacher);
-            attendanceDate = itemView.findViewById(R.id.attendanceDate);
-            attendanceTime = itemView.findViewById(R.id.attendanceTime);
-        }
-    }
-}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/AttendanceAdapter.kt

@@ -0,0 +1,188 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-4-29.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance
+
+import android.animation.ObjectAnimator
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.isInvisible
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.RecyclerView
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.data.db.full.AttendanceFull
+import pl.szczodrzynski.edziennik.startCoroutineTimer
+import pl.szczodrzynski.edziennik.ui.modules.attendance.models.AttendanceDayRange
+import pl.szczodrzynski.edziennik.ui.modules.attendance.models.AttendanceEmpty
+import pl.szczodrzynski.edziennik.ui.modules.attendance.models.AttendanceMonth
+import pl.szczodrzynski.edziennik.ui.modules.attendance.models.AttendanceSubject
+import pl.szczodrzynski.edziennik.ui.modules.attendance.viewholder.*
+import pl.szczodrzynski.edziennik.ui.modules.grades.models.ExpandableItemModel
+import pl.szczodrzynski.edziennik.ui.modules.grades.viewholder.BindableViewHolder
+import kotlin.coroutines.CoroutineContext
+
+class AttendanceAdapter(
+        val activity: AppCompatActivity,
+        val type: Int,
+        var onAttendanceClick: ((item: AttendanceFull) -> Unit)? = null
+) : RecyclerView.Adapter<RecyclerView.ViewHolder>(), CoroutineScope {
+    companion object {
+        private const val TAG = "AttendanceAdapter"
+        private const val ITEM_TYPE_ATTENDANCE = 0
+        private const val ITEM_TYPE_DAY_RANGE = 1
+        private const val ITEM_TYPE_MONTH = 2
+        private const val ITEM_TYPE_SUBJECT = 3
+        private const val ITEM_TYPE_EMPTY = 4
+        const val STATE_CLOSED = 0
+        const val STATE_OPENED = 1
+    }
+
+    private val app = activity.applicationContext as App
+    // optional: place the manager here
+
+    private val job = Job()
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+
+    var items = mutableListOf<Any>()
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
+        val inflater = LayoutInflater.from(parent.context)
+        return when (viewType) {
+            ITEM_TYPE_ATTENDANCE -> AttendanceViewHolder(inflater, parent)
+            ITEM_TYPE_DAY_RANGE -> DayRangeViewHolder(inflater, parent)
+            ITEM_TYPE_MONTH -> MonthViewHolder(inflater, parent)
+            ITEM_TYPE_SUBJECT -> SubjectViewHolder(inflater, parent)
+            ITEM_TYPE_EMPTY -> EmptyViewHolder(inflater, parent)
+            else -> throw IllegalArgumentException("Incorrect viewType")
+        }
+    }
+
+    override fun getItemViewType(position: Int): Int {
+        return when (items[position]) {
+            is AttendanceFull -> ITEM_TYPE_ATTENDANCE
+            is AttendanceDayRange -> ITEM_TYPE_DAY_RANGE
+            is AttendanceMonth -> ITEM_TYPE_MONTH
+            is AttendanceSubject -> ITEM_TYPE_SUBJECT
+            is AttendanceEmpty -> ITEM_TYPE_EMPTY
+            else -> throw IllegalArgumentException("Incorrect viewType")
+        }
+    }
+
+    private val onClickListener = View.OnClickListener { view ->
+        val model = view.getTag(R.string.tag_key_model)
+        if (model is AttendanceFull) {
+            onAttendanceClick?.invoke(model)
+            return@OnClickListener
+        }
+        if (model !is ExpandableItemModel<*>)
+            return@OnClickListener
+        expandModel(model, view)
+    }
+
+    fun expandModel(model: ExpandableItemModel<*>?, view: View?, notifyAdapter: Boolean = true) {
+        model ?: return
+        val position = items.indexOf(model)
+        if (position == -1)
+            return
+
+        view?.findViewById<View>(R.id.dropdownIcon)?.let { dropdownIcon ->
+            ObjectAnimator.ofFloat(
+                    dropdownIcon,
+                    View.ROTATION,
+                    if (model.state == STATE_CLOSED) 0f else 180f,
+                    if (model.state == STATE_CLOSED) 180f else 0f
+            ).setDuration(200).start();
+        }
+
+        if (model is AttendanceDayRange || model is AttendanceMonth) {
+            // hide the preview, show summary
+            val preview = view?.findViewById<View>(R.id.previewContainer)
+            val summary = view?.findViewById<View>(R.id.summaryContainer)
+            val percentage = view?.findViewById<View>(R.id.percentage)
+            preview?.isInvisible = model.state == STATE_CLOSED
+            summary?.isInvisible = model.state != STATE_CLOSED
+            percentage?.isVisible = model.state != STATE_CLOSED
+        }
+
+        if (model.state == STATE_CLOSED) {
+
+            val subItems = when {
+                model.items.isEmpty() -> listOf(AttendanceEmpty())
+                else -> model.items
+            }
+
+            model.state = STATE_OPENED
+            items.addAll(position + 1, subItems.filterNotNull())
+            if (notifyAdapter) notifyItemRangeInserted(position + 1, subItems.size)
+        }
+        else {
+            val start = position + 1
+            var end: Int = items.size
+            for (i in start until items.size) {
+                val model1 = items[i]
+                val level = (model1 as? ExpandableItemModel<*>)?.level ?: 3
+                if (level <= model.level) {
+                    end = i
+                    break
+                } else {
+                    if (model1 is ExpandableItemModel<*> && model1.state == STATE_OPENED) {
+                        model1.state = STATE_CLOSED
+                    }
+                }
+            }
+
+            if (end != -1) {
+                items.subList(start, end).clear()
+                if (notifyAdapter) notifyItemRangeRemoved(start, end - start)
+            }
+
+            model.state = STATE_CLOSED
+        }
+    }
+
+    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
+        val item = items[position]
+        if (holder !is BindableViewHolder<*, *>)
+            return
+
+        val viewType = when (holder) {
+            is AttendanceViewHolder -> ITEM_TYPE_ATTENDANCE
+            is DayRangeViewHolder -> ITEM_TYPE_DAY_RANGE
+            is MonthViewHolder -> ITEM_TYPE_MONTH
+            is SubjectViewHolder -> ITEM_TYPE_SUBJECT
+            is EmptyViewHolder -> ITEM_TYPE_EMPTY
+            else -> throw IllegalArgumentException("Incorrect viewType")
+        }
+        holder.itemView.setTag(R.string.tag_key_view_type, viewType)
+        holder.itemView.setTag(R.string.tag_key_position, position)
+        holder.itemView.setTag(R.string.tag_key_model, item)
+
+        when {
+            holder is AttendanceViewHolder && item is AttendanceFull -> holder.onBind(activity, app, item, position, this)
+            holder is DayRangeViewHolder && item is AttendanceDayRange -> holder.onBind(activity, app, item, position, this)
+            holder is MonthViewHolder && item is AttendanceMonth -> holder.onBind(activity, app, item, position, this)
+            holder is SubjectViewHolder && item is AttendanceSubject -> holder.onBind(activity, app, item, position, this)
+            holder is EmptyViewHolder && item is AttendanceEmpty -> holder.onBind(activity, app, item, position, this)
+        }
+
+        holder.itemView.setOnClickListener(onClickListener)
+    }
+
+    fun notifyItemChanged(model: Any) {
+        startCoroutineTimer(1000L, 0L) {
+            val index = items.indexOf(model)
+            if (index != -1)
+                notifyItemChanged(index)
+        }
+    }
+
+    override fun getItemCount() = items.size
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/AttendanceBar.kt

@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-5-1.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.graphics.*
+import android.text.TextPaint
+import android.util.AttributeSet
+import android.view.View
+import pl.szczodrzynski.edziennik.dp
+import pl.szczodrzynski.edziennik.utils.Colors
+
+/* https://github.com/JakubekWeg/Mobishit/blob/master/app/src/main/java/jakubweg/mobishit/view/AttendanceBarView.kt */
+class AttendanceBar : View {
+
+    constructor(context: Context) : super(context)
+
+    constructor(context: Context, attrs: AttributeSet) : super(context, attrs)
+
+    constructor(context: Context, attrs: AttributeSet, defStyle: Int) : super(context, attrs, defStyle)
+
+    private var attendancesList = listOf<AttendanceItem>()
+    private val mainPaint = Paint(Paint.ANTI_ALIAS_FLAG)
+    private val textPaint = TextPaint(Paint.ANTI_ALIAS_FLAG).also {
+        it.textAlign = Paint.Align.CENTER
+    }
+    private var mPath = Path()
+    private var mCornerRadius: Float = 0.toFloat()
+
+    init {
+        mCornerRadius = 4.dp.toFloat()
+
+        if (isInEditMode)
+            setAttendanceData(mapOf(
+                    0xff43a047.toInt() to 23,
+                    0xff009688.toInt() to 187,
+                    0xff3f51b5.toInt() to 46,
+                    0xff3f51b5.toInt() to 5,
+                    0xffffc107.toInt() to 5,
+                    0xff9e9e9e.toInt() to 26,
+                    0xff76ff03.toInt() to 34,
+                    0xffff3d00.toInt() to 8
+            ))
+    }
+
+    // color, count
+    private class AttendanceItem(var color: Int, var count: Int)
+
+    fun setAttendanceData(list: Map<Int, Int>) {
+        attendancesList = list.map { AttendanceItem(it.key, it.value) }
+        setWillNotDraw(false)
+        invalidate()
+    }
+
+    override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
+        super.onSizeChanged(w, h, oldw, oldh)
+        val r = RectF(0f, 0f, w.toFloat(), h.toFloat())
+        mPath = Path().apply {
+            addRoundRect(r, mCornerRadius, mCornerRadius, Path.Direction.CW)
+            close()
+        }
+    }
+
+    @SuppressLint("DrawAllocation", "CanvasSize")
+    override fun onDraw(canvas: Canvas?) {
+        canvas ?: return
+
+        val sum = attendancesList.sumBy { it.count }
+        if (sum == 0) {
+            return
+        }
+
+        canvas.clipPath(mPath)
+
+        val top = paddingTop.toFloat()
+        val bottom = (height - paddingBottom).toFloat()
+        var left = paddingLeft.toFloat()
+        val unitWidth = (width - paddingRight - paddingLeft).toFloat() / sum.toFloat()
+
+        textPaint.color = Color.BLACK
+        textPaint.textSize = 14.dp.toFloat()
+
+        for (e in attendancesList) {
+            if (e.count == 0)
+                continue
+
+            val width = unitWidth * e.count
+            mainPaint.color = e.color
+            canvas.drawRect(left, top, left + width, bottom, mainPaint)
+
+            val textBounds = Rect()
+            textPaint.getTextBounds(e.count.toString(), 0, e.count.toString().length, textBounds)
+            if (width > textBounds.width() + 8.dp) {
+                textPaint.color = Colors.legibleTextColor(e.color)
+                canvas.drawText(e.count.toString(), left + width / 2, bottom - height / 2 + textBounds.height()/2, textPaint)
+            }
+
+            left += width
+        }
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/AttendanceFragment.kt

@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-4-30.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance
+
+import android.os.AsyncTask
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Toast
+import androidx.fragment.app.Fragment
+import com.mikepenz.iconics.typeface.library.community.material.CommunityMaterial
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import pl.szczodrzynski.edziennik.*
+import pl.szczodrzynski.edziennik.data.db.entity.Metadata
+import pl.szczodrzynski.edziennik.databinding.AttendanceFragmentBinding
+import pl.szczodrzynski.edziennik.ui.dialogs.settings.AttendanceConfigDialog
+import pl.szczodrzynski.edziennik.ui.modules.base.lazypager.FragmentLazyPagerAdapter
+import pl.szczodrzynski.navlib.bottomsheet.items.BottomSheetPrimaryItem
+import pl.szczodrzynski.navlib.bottomsheet.items.BottomSheetSeparatorItem
+import kotlin.coroutines.CoroutineContext
+
+class AttendanceFragment : Fragment(), CoroutineScope {
+    companion object {
+        private const val TAG = "AttendanceFragment"
+        const val VIEW_DAYS = 0
+        const val VIEW_MONTHS = 1
+        const val VIEW_SUMMARY = 2
+        const val VIEW_LIST = 3
+        var pageSelection = 1
+    }
+
+    private lateinit var app: App
+    private lateinit var activity: MainActivity
+    private lateinit var b: AttendanceFragmentBinding
+
+    private val job: Job = Job()
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+
+    // local/private variables go here
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        activity = (getActivity() as MainActivity?) ?: return null
+        context ?: return null
+        app = activity.application as App
+        b = AttendanceFragmentBinding.inflate(inflater)
+        b.refreshLayout.setParent(activity.swipeRefreshLayout)
+        return b.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        if (!isAdded) return
+
+        activity.bottomSheet.prependItems(
+                BottomSheetPrimaryItem(true)
+                        .withTitle(R.string.menu_attendance_config)
+                        .withIcon(CommunityMaterial.Icon2.cmd_settings_outline)
+                        .withOnClickListener(View.OnClickListener {
+                            activity.bottomSheet.close()
+                            AttendanceConfigDialog(activity, true, null, null)
+                        }),
+                BottomSheetSeparatorItem(true),
+                BottomSheetPrimaryItem(true)
+                        .withTitle(R.string.menu_mark_as_read)
+                        .withIcon(CommunityMaterial.Icon.cmd_eye_check_outline)
+                        .withOnClickListener(View.OnClickListener {
+                            activity.bottomSheet.close()
+                            AsyncTask.execute { App.db.metadataDao().setAllSeen(App.profileId, Metadata.TYPE_ATTENDANCE, true) }
+                            Toast.makeText(activity, R.string.main_menu_mark_as_read_success, Toast.LENGTH_SHORT).show()
+                        })
+        )
+        activity.gainAttention()
+
+        if (pageSelection == 1)
+            pageSelection = app.config.forProfile().attendance.attendancePageSelection
+
+        val pagerAdapter = FragmentLazyPagerAdapter(
+                fragmentManager ?: return,
+                b.refreshLayout,
+                listOf(
+                        AttendanceSummaryFragment() to getString(R.string.attendance_tab_summary),
+
+                        AttendanceListFragment().apply {
+                            arguments = Bundle("viewType" to VIEW_DAYS)
+                        } to getString(R.string.attendance_tab_days),
+
+                        AttendanceListFragment().apply {
+                            arguments = Bundle("viewType" to VIEW_MONTHS)
+                        } to getString(R.string.attendance_tab_months),
+
+                        AttendanceListFragment().apply {
+                            arguments = Bundle("viewType" to VIEW_LIST)
+                        } to getString(R.string.attendance_tab_list)
+                )
+        )
+        b.viewPager.apply {
+            offscreenPageLimit = 1
+            adapter = pagerAdapter
+            currentItem = pageSelection
+            addOnPageSelectedListener {
+                pageSelection = it
+                app.config.forProfile().attendance.attendancePageSelection = it
+            }
+            b.tabLayout.setupWithViewPager(this)
+        }
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/AttendanceFragment_.java

@@ -51,7 +51,7 @@ import static pl.szczodrzynski.edziennik.data.db.entity.Attendance.TYPE_RELEASED
 import static pl.szczodrzynski.edziennik.data.db.entity.LoginStore.LOGIN_TYPE_VULCAN;
 import static pl.szczodrzynski.edziennik.data.db.entity.Metadata.TYPE_ATTENDANCE;
 
-public class AttendanceFragment extends Fragment {
+public class AttendanceFragment_ extends Fragment {
 
     private App app = null;
     private MainActivity activity = null;
@@ -278,11 +278,12 @@ public class AttendanceFragment extends Fragment {
             b.attendanceView.setVisibility(View.VISIBLE);
             b.attendanceNoData.setVisibility(View.GONE);
             if ((adapter = (AttendanceAdapter) b.attendanceView.getAdapter()) != null) {
-                adapter.attendanceList = filteredList;
+                //adapter.setItems(filteredList);
                 adapter.notifyDataSetChanged();
             }
             else {
-                adapter = new AttendanceAdapter(getContext(), filteredList);
+                //adapter = new AttendanceAdapter(activity, true, null);
+                //adapter.setItems(filteredList);
                 b.attendanceView.setAdapter(adapter);
             }
         }

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/AttendanceListFragment.kt

@@ -0,0 +1,203 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-4-30.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.core.view.isVisible
+import androidx.lifecycle.Observer
+import androidx.recyclerview.widget.LinearLayoutManager
+import kotlinx.coroutines.*
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.MainActivity
+import pl.szczodrzynski.edziennik.data.db.entity.Attendance
+import pl.szczodrzynski.edziennik.data.db.full.AttendanceFull
+import pl.szczodrzynski.edziennik.databinding.AttendanceListFragmentBinding
+import pl.szczodrzynski.edziennik.isNotNullNorEmpty
+import pl.szczodrzynski.edziennik.startCoroutineTimer
+import pl.szczodrzynski.edziennik.ui.modules.attendance.models.AttendanceDayRange
+import pl.szczodrzynski.edziennik.ui.modules.attendance.models.AttendanceMonth
+import pl.szczodrzynski.edziennik.ui.modules.base.lazypager.LazyFragment
+import pl.szczodrzynski.edziennik.ui.modules.grades.models.GradesSubject
+import pl.szczodrzynski.edziennik.utils.models.Date
+import kotlin.coroutines.CoroutineContext
+
+class AttendanceListFragment : LazyFragment(), CoroutineScope {
+    companion object {
+        private const val TAG = "AttendanceListFragment"
+    }
+
+    private lateinit var app: App
+    private lateinit var activity: MainActivity
+    private lateinit var b: AttendanceListFragmentBinding
+
+    private val job: Job = Job()
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+
+    // local/private variables go here
+    private val manager by lazy { app.attendanceManager }
+    private var viewType = AttendanceFragment.VIEW_DAYS
+    private var expandSubjectId = 0L
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        activity = (getActivity() as MainActivity?) ?: return null
+        context ?: return null
+        app = activity.application as App
+        b = AttendanceListFragmentBinding.inflate(inflater)
+        b.refreshLayout.setParent(activity.swipeRefreshLayout)
+        return b.root
+    }
+
+    override fun onPageCreated(): Boolean { startCoroutineTimer(100L) {
+        if (!isAdded) return@startCoroutineTimer
+
+        viewType = arguments?.getInt("viewType") ?: AttendanceFragment.VIEW_DAYS
+        expandSubjectId = arguments?.getLong("gradesSubjectId") ?: 0L
+
+        val adapter = AttendanceAdapter(activity, viewType)
+        var firstRun = true
+
+        app.db.attendanceDao().getAll(App.profileId).observe(this@AttendanceListFragment, Observer { items -> this@AttendanceListFragment.launch {
+            if (!isAdded) return@launch
+
+            // load & configure the adapter
+            adapter.items = withContext(Dispatchers.Default) { processAttendance(items) }
+            if (items.isNotNullNorEmpty() && b.list.adapter == null) {
+                b.list.adapter = adapter
+                b.list.apply {
+                    setHasFixedSize(true)
+                    layoutManager = LinearLayoutManager(context)
+                    addOnScrollListener(onScrollListener)
+                }
+            }
+            adapter.notifyDataSetChanged()
+
+            if (firstRun) {
+                expandSubject(adapter)
+                firstRun = false
+            }
+
+            // show/hide relevant views
+            b.progressBar.isVisible = false
+            if (items.isNullOrEmpty()) {
+                b.list.isVisible = false
+                b.noData.isVisible = true
+            } else {
+                b.list.isVisible = true
+                b.noData.isVisible = false
+            }
+        }})
+
+        adapter.onAttendanceClick = {
+            //GradeDetailsDialog(activity, it)
+        }
+    }; return true}
+
+    private fun expandSubject(adapter: AttendanceAdapter) {
+        var expandSubjectModel: GradesSubject? = null
+        if (expandSubjectId != 0L) {
+            expandSubjectModel = adapter.items.firstOrNull { it is GradesSubject && it.subjectId == expandSubjectId } as? GradesSubject
+            adapter.expandModel(
+                    model = expandSubjectModel,
+                    view = null,
+                    notifyAdapter = false
+            )
+        }
+
+        startCoroutineTimer(500L) {
+            if (expandSubjectModel != null) {
+                b.list.smoothScrollToPosition(
+                        adapter.items.indexOf(expandSubjectModel) + expandSubjectModel.semesters.size + (expandSubjectModel.semesters.firstOrNull()?.grades?.size ?: 0)
+                )
+            }
+        }
+    }
+
+    @Suppress("SuspendFunctionOnCoroutineScope")
+    private fun processAttendance(attendance: List<AttendanceFull>): MutableList<Any> {
+        if (attendance.isEmpty())
+            return mutableListOf()
+
+        val groupConsecutiveDays = app.config.forProfile().attendance.groupConsecutiveDays
+        val showPresenceInMonth = app.config.forProfile().attendance.showPresenceInMonth
+
+        if (viewType == AttendanceFragment.VIEW_DAYS) {
+            val items = attendance
+                    .filter { it.baseType != Attendance.TYPE_PRESENT }
+                    .groupBy { it.date }
+                    .map { AttendanceDayRange(
+                            rangeStart = it.key,
+                            rangeEnd = null,
+                            items = it.value.toMutableList()
+                    ) }
+                    .toMutableList()
+
+            if (groupConsecutiveDays) {
+                items.sortByDescending { it.rangeStart }
+                val iterator = items.listIterator()
+
+                var element = iterator.next()
+                while (iterator.hasNext()) {
+                    var nextElement = iterator.next()
+                    while (Date.diffDays(element.rangeStart, nextElement.rangeStart) <= 1) {
+                        if (element.rangeEnd == null)
+                            element.rangeEnd = element.rangeStart
+
+                        element.items.addAll(nextElement.items)
+                        element.rangeStart = nextElement.rangeStart
+                        iterator.remove()
+                        nextElement = iterator.next()
+                    }
+                    element = nextElement
+                }
+            }
+
+            return items.toMutableList()
+        }
+        else if (viewType == AttendanceFragment.VIEW_MONTHS) {
+            val items = attendance
+                    .groupBy { it.date.year to it.date.month }
+                    .map { AttendanceMonth(
+                            year = it.key.first,
+                            month = it.key.second,
+                            items = it.value.toMutableList()
+                    ) }
+
+            items.forEach { month ->
+                month.typeCountMap = month.items
+                        .groupBy { it.baseType }
+                        .map { it.key to it.value.size }
+                        .sortedBy { it.first }
+                        .toMap()
+
+                val totalCount = month.typeCountMap.entries.sumBy { it.value }
+                val presenceCount = month.typeCountMap.entries.sumBy {
+                    when (it.key) {
+                        Attendance.TYPE_PRESENT,
+                            Attendance.TYPE_PRESENT_CUSTOM,
+                            Attendance.TYPE_BELATED,
+                            Attendance.TYPE_BELATED_EXCUSED,
+                            Attendance.TYPE_RELEASED -> it.value
+                        else -> 0
+                    }
+                }
+
+                month.percentage = if (totalCount == 0)
+                    0f
+                else
+                    presenceCount.toFloat() / totalCount.toFloat() * 100f
+
+                if (!showPresenceInMonth)
+                    month.items.removeAll { it.baseType == Attendance.TYPE_PRESENT }
+            }
+
+            return items.toMutableList()
+        }
+        return attendance.filter { it.baseType != Attendance.TYPE_PRESENT }.toMutableList()
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/AttendanceSummaryFragment.kt

@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-5-4.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.core.view.isVisible
+import androidx.lifecycle.Observer
+import androidx.recyclerview.widget.LinearLayoutManager
+import kotlinx.coroutines.*
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.MainActivity
+import pl.szczodrzynski.edziennik.data.db.entity.Attendance
+import pl.szczodrzynski.edziennik.data.db.full.AttendanceFull
+import pl.szczodrzynski.edziennik.databinding.AttendanceListFragmentBinding
+import pl.szczodrzynski.edziennik.isNotNullNorEmpty
+import pl.szczodrzynski.edziennik.startCoroutineTimer
+import pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceFragment.Companion.VIEW_SUMMARY
+import pl.szczodrzynski.edziennik.ui.modules.attendance.models.AttendanceSubject
+import pl.szczodrzynski.edziennik.ui.modules.base.lazypager.LazyFragment
+import pl.szczodrzynski.edziennik.ui.modules.grades.models.GradesSubject
+import kotlin.coroutines.CoroutineContext
+
+class AttendanceSummaryFragment : LazyFragment(), CoroutineScope {
+    companion object {
+        private const val TAG = "AttendanceSummaryFragment"
+    }
+
+    private lateinit var app: App
+    private lateinit var activity: MainActivity
+    private lateinit var b: AttendanceListFragmentBinding
+
+    private val job: Job = Job()
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+
+    // local/private variables go here
+    private val manager by lazy { app.attendanceManager }
+    private var expandSubjectId = 0L
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        activity = (getActivity() as MainActivity?) ?: return null
+        context ?: return null
+        app = activity.application as App
+        b = AttendanceListFragmentBinding.inflate(inflater)
+        b.refreshLayout.setParent(activity.swipeRefreshLayout)
+        return b.root
+    }
+
+    override fun onPageCreated(): Boolean { startCoroutineTimer(100L) {
+        if (!isAdded) return@startCoroutineTimer
+
+        expandSubjectId = arguments?.getLong("gradesSubjectId") ?: 0L
+
+        val adapter = AttendanceAdapter(activity, VIEW_SUMMARY)
+        var firstRun = true
+
+        app.db.attendanceDao().getAll(App.profileId).observe(this@AttendanceSummaryFragment, Observer { items -> this@AttendanceSummaryFragment.launch {
+            if (!isAdded) return@launch
+
+            // load & configure the adapter
+            adapter.items = withContext(Dispatchers.Default) { processAttendance(items) }
+            if (items.isNotNullNorEmpty() && b.list.adapter == null) {
+                b.list.adapter = adapter
+                b.list.apply {
+                    setHasFixedSize(true)
+                    layoutManager = LinearLayoutManager(context)
+                    addOnScrollListener(onScrollListener)
+                }
+            }
+            adapter.notifyDataSetChanged()
+
+            if (firstRun) {
+                expandSubject(adapter)
+                firstRun = false
+            }
+
+            // show/hide relevant views
+            b.progressBar.isVisible = false
+            if (items.isNullOrEmpty()) {
+                b.list.isVisible = false
+                b.noData.isVisible = true
+            } else {
+                b.list.isVisible = true
+                b.noData.isVisible = false
+            }
+        }})
+
+        adapter.onAttendanceClick = {
+            //GradeDetailsDialog(activity, it)
+        }
+    }; return true}
+
+    private fun expandSubject(adapter: AttendanceAdapter) {
+        var expandSubjectModel: GradesSubject? = null
+        if (expandSubjectId != 0L) {
+            expandSubjectModel = adapter.items.firstOrNull { it is GradesSubject && it.subjectId == expandSubjectId } as? GradesSubject
+            adapter.expandModel(
+                    model = expandSubjectModel,
+                    view = null,
+                    notifyAdapter = false
+            )
+        }
+
+        startCoroutineTimer(500L) {
+            if (expandSubjectModel != null) {
+                b.list.smoothScrollToPosition(
+                        adapter.items.indexOf(expandSubjectModel) + expandSubjectModel.semesters.size + (expandSubjectModel.semesters.firstOrNull()?.grades?.size ?: 0)
+                )
+            }
+        }
+    }
+
+    @Suppress("SuspendFunctionOnCoroutineScope")
+    private fun processAttendance(attendance: List<AttendanceFull>): MutableList<Any> {
+        if (attendance.isEmpty())
+            return mutableListOf()
+
+        val items = attendance
+                .groupBy { it.subjectId }
+                .map { AttendanceSubject(
+                        subjectId = it.key,
+                        subjectName = it.value.firstOrNull()?.subjectLongName ?: "",
+                        items = it.value.toMutableList()
+                ) }
+                .sortedBy { it.subjectName.toLowerCase() }
+
+        items.forEach { subject ->
+            subject.typeCountMap = subject.items
+                    .groupBy { it.baseType }
+                    .map { it.key to it.value.size }
+                    .sortedBy { it.first }
+                    .toMap()
+
+            val totalCount = subject.typeCountMap.entries.sumBy { it.value }
+            val presenceCount = subject.typeCountMap.entries.sumBy {
+                when (it.key) {
+                    Attendance.TYPE_PRESENT,
+                    Attendance.TYPE_PRESENT_CUSTOM,
+                    Attendance.TYPE_BELATED,
+                    Attendance.TYPE_BELATED_EXCUSED,
+                    Attendance.TYPE_RELEASED -> it.value
+                    else -> 0
+                }
+            }
+
+            subject.percentage = if (totalCount == 0)
+                0f
+            else
+                presenceCount.toFloat() / totalCount.toFloat() * 100f
+
+            if (!false /* showPresenceInSubject */)
+                subject.items.removeAll { it.baseType == Attendance.TYPE_PRESENT }
+        }
+
+        return items.toMutableList()
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/AttendanceView.kt

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-4-29.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.text.TextUtils
+import android.util.AttributeSet
+import android.util.TypedValue
+import android.view.Gravity
+import android.view.View
+import android.view.ViewGroup
+import android.widget.LinearLayout
+import androidx.appcompat.widget.AppCompatTextView
+import androidx.core.graphics.ColorUtils
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.data.db.entity.Attendance
+import pl.szczodrzynski.edziennik.dp
+import pl.szczodrzynski.edziennik.setTintColor
+import pl.szczodrzynski.edziennik.utils.managers.AttendanceManager
+
+class AttendanceView : AppCompatTextView {
+
+    @JvmOverloads
+    constructor(context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0) : super(context, attrs, defStyleAttr)
+
+    constructor(context: Context, attendance: Attendance, manager: AttendanceManager) : this(context, null) {
+        setAttendance(attendance, manager, false)
+    }
+
+    @SuppressLint("RestrictedApi")
+    fun setAttendance(attendance: Attendance?, manager: AttendanceManager, bigView: Boolean = false) {
+        if (attendance == null) {
+            visibility = View.GONE
+            return
+        }
+        visibility = View.VISIBLE
+
+        val attendanceName = if (manager.useSymbols)
+            attendance.typeSymbol
+        else
+            attendance.typeShort
+
+        val attendanceColor = manager.getAttendanceColor(attendance)
+
+        text = when {
+            attendanceName.isBlank() -> "  "
+            else -> attendanceName
+        }
+
+        setTextColor(if (ColorUtils.calculateLuminance(attendanceColor) > 0.3)
+            0xaa000000.toInt()
+        else
+            0xccffffff.toInt())
+
+        setBackgroundResource(if (bigView) R.drawable.bg_rounded_8dp else R.drawable.bg_rounded_4dp)
+        background.setTintColor(attendanceColor)
+        gravity = Gravity.CENTER
+
+        if (bigView) {
+            setTextSize(TypedValue.COMPLEX_UNIT_SP, 22f)
+            setAutoSizeTextTypeUniformWithConfiguration(
+                    14,
+                    32,
+                    1,
+                    TypedValue.COMPLEX_UNIT_SP
+            )
+            setPadding(2.dp, 2.dp, 2.dp, 2.dp)
+        }
+        else {
+            setTextSize(TypedValue.COMPLEX_UNIT_SP, 14f)
+            setPadding(5.dp, 0, 5.dp, 0)
+            layoutParams = LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT).apply {
+                setMargins(0, 0, 5.dp, 0)
+            }
+            maxLines = 1
+            ellipsize = TextUtils.TruncateAt.END
+            measure(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)
+        }
+    }
+}
+

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/models/AttendanceCount.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-4-30.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance.models
+
+class AttendanceCount {
+    var normalSum = 0f
+    var normalCount = 0
+    var normalWeightedSum = 0f
+    var normalWeightedCount = 0f
+
+    var pointSum = 0f
+
+    var pointAvgSum = 0f
+    var pointAvgMax = 0f
+
+    var normalAvg: Float? = null
+    var pointAvgPercent: Float? = null
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/models/AttendanceDayRange.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-4-30.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance.models
+
+import pl.szczodrzynski.edziennik.data.db.entity.Attendance
+import pl.szczodrzynski.edziennik.data.db.full.AttendanceFull
+import pl.szczodrzynski.edziennik.ui.modules.grades.models.ExpandableItemModel
+import pl.szczodrzynski.edziennik.utils.models.Date
+
+data class AttendanceDayRange(
+        var rangeStart: Date,
+        var rangeEnd: Date?,
+        override val items: MutableList<AttendanceFull> = mutableListOf()
+) : ExpandableItemModel<AttendanceFull>(items) {
+    override var level = 1
+
+    var lastAddedDate = 0L
+
+    var hasUnseen: Boolean = false
+        get() = field || items.any { it.baseType != Attendance.TYPE_PRESENT && !it.seen }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/models/AttendanceEmpty.kt

@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-5-4.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance.models
+
+class AttendanceEmpty

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/models/AttendanceMonth.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-4-30.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance.models
+
+import pl.szczodrzynski.edziennik.data.db.entity.Attendance
+import pl.szczodrzynski.edziennik.data.db.full.AttendanceFull
+import pl.szczodrzynski.edziennik.ui.modules.grades.models.ExpandableItemModel
+
+data class AttendanceMonth(
+        val year: Int,
+        val month: Int,
+        override val items: MutableList<AttendanceFull> = mutableListOf()
+) : ExpandableItemModel<AttendanceFull>(items) {
+    override var level = 1
+
+    var lastAddedDate = 0L
+
+    var hasUnseen: Boolean = false
+        get() = field || items.any { it.baseType != Attendance.TYPE_PRESENT && !it.seen }
+
+    var typeCountMap: Map<Int, Int> = mapOf()
+    var percentage: Float = 0f
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/models/AttendanceSubject.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-5-4.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance.models
+
+import pl.szczodrzynski.edziennik.data.db.entity.Attendance
+import pl.szczodrzynski.edziennik.data.db.full.AttendanceFull
+import pl.szczodrzynski.edziennik.ui.modules.grades.models.ExpandableItemModel
+
+data class AttendanceSubject(
+        val subjectId: Long,
+        val subjectName: String,
+        override val items: MutableList<AttendanceFull> = mutableListOf()
+) : ExpandableItemModel<AttendanceFull>(items) {
+    override var level = 1
+
+    var lastAddedDate = 0L
+
+    var hasUnseen: Boolean = false
+        get() = field || items.any { it.baseType != Attendance.TYPE_PRESENT && !it.seen }
+
+    var typeCountMap: Map<Int, Int> = mapOf()
+    var percentage: Float = 0f
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/viewholder/AttendanceViewHolder.kt

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-4-30.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance.viewholder
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.view.ContextThemeWrapper
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.RecyclerView
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.concat
+import pl.szczodrzynski.edziennik.data.db.full.AttendanceFull
+import pl.szczodrzynski.edziennik.databinding.AttendanceItemAttendanceBinding
+import pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceAdapter
+import pl.szczodrzynski.edziennik.ui.modules.attendance.models.AttendanceDayRange
+import pl.szczodrzynski.edziennik.ui.modules.attendance.models.AttendanceMonth
+import pl.szczodrzynski.edziennik.ui.modules.grades.models.ExpandableItemModel
+import pl.szczodrzynski.edziennik.ui.modules.grades.viewholder.BindableViewHolder
+import pl.szczodrzynski.edziennik.utils.Themes
+
+class AttendanceViewHolder(
+        inflater: LayoutInflater,
+        parent: ViewGroup,
+        val b: AttendanceItemAttendanceBinding = AttendanceItemAttendanceBinding.inflate(inflater, parent, false)
+) : RecyclerView.ViewHolder(b.root), BindableViewHolder<AttendanceFull, AttendanceAdapter> {
+    companion object {
+        private const val TAG = "AttendanceViewHolder"
+    }
+
+    override fun onBind(activity: AppCompatActivity, app: App, item: AttendanceFull, position: Int, adapter: AttendanceAdapter) {
+        val manager = app.attendanceManager
+        val contextWrapper = ContextThemeWrapper(activity, Themes.appTheme)
+
+        val bullet = " • "
+
+        b.attendanceView.setAttendance(item, manager, bigView = true)
+
+        b.type.text = item.typeName
+        b.subjectName.text = item.subjectLongName ?: item.lessonTopic
+        b.dateTime.text = listOf(
+                item.date.formattedStringShort,
+                item.startTime?.stringHM,
+                item.lessonNumber?.let { app.getString(R.string.attendance_lesson_number_format, it) }
+        ).concat(bullet)
+
+        if (item.showAsUnseen == null)
+            item.showAsUnseen = !item.seen
+
+        b.unread.isVisible = item.showAsUnseen == true
+        if (!item.seen) {
+            manager.markAsSeen(item)
+
+            val container = adapter.items.firstOrNull {
+                it is ExpandableItemModel<*> && it.items.contains(item)
+            } as? ExpandableItemModel<*> ?: return
+
+            var hasUnseen = true
+            if (container is AttendanceDayRange) {
+                hasUnseen = container.items.any { !it.seen }
+                container.hasUnseen = hasUnseen
+            }
+            if (container is AttendanceMonth) {
+                hasUnseen = container.items.any { !it.seen }
+                container.hasUnseen = hasUnseen
+            }
+
+            // check if the unseen status has changed
+            if (!hasUnseen) {
+                adapter.notifyItemChanged(container)
+            }
+        }
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/viewholder/DayRangeViewHolder.kt

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-4-30.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance.viewholder
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.view.ContextThemeWrapper
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.RecyclerView
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.concat
+import pl.szczodrzynski.edziennik.data.db.entity.Attendance
+import pl.szczodrzynski.edziennik.databinding.AttendanceItemContainerBinding
+import pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceAdapter
+import pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceAdapter.Companion.STATE_CLOSED
+import pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceView
+import pl.szczodrzynski.edziennik.ui.modules.attendance.models.AttendanceDayRange
+import pl.szczodrzynski.edziennik.ui.modules.grades.viewholder.BindableViewHolder
+import pl.szczodrzynski.edziennik.utils.Themes
+
+class DayRangeViewHolder(
+        inflater: LayoutInflater,
+        parent: ViewGroup,
+        val b: AttendanceItemContainerBinding = AttendanceItemContainerBinding.inflate(inflater, parent, false)
+) : RecyclerView.ViewHolder(b.root), BindableViewHolder<AttendanceDayRange, AttendanceAdapter> {
+    companion object {
+        private const val TAG = "DayRangeViewHolder"
+    }
+
+    override fun onBind(activity: AppCompatActivity, app: App, item: AttendanceDayRange, position: Int, adapter: AttendanceAdapter) {
+        val manager = app.attendanceManager
+        val contextWrapper = ContextThemeWrapper(activity, Themes.appTheme)
+
+        b.title.text = listOf(
+                item.rangeStart.formattedString,
+                item.rangeEnd?.formattedString
+        ).concat(" - ")
+
+        b.dropdownIcon.rotation = when (item.state) {
+            STATE_CLOSED -> 0f
+            else -> 180f
+        }
+
+        b.unread.isVisible = item.hasUnseen
+
+        b.previewContainer.visibility = if (item.state == STATE_CLOSED) View.VISIBLE else View.INVISIBLE
+        b.summaryContainer.visibility = if (item.state == STATE_CLOSED) View.INVISIBLE else View.VISIBLE
+
+        b.previewContainer.removeAllViews()
+
+        for (attendance in item.items) {
+            if (attendance.baseType == Attendance.TYPE_PRESENT_CUSTOM || attendance.baseType == Attendance.TYPE_UNKNOWN)
+                continue
+            b.previewContainer.addView(AttendanceView(
+                    contextWrapper,
+                    attendance,
+                    manager
+            ))
+        }
+        if (item.items.isEmpty() || item.items.none { it.baseType != Attendance.TYPE_PRESENT_CUSTOM && it.baseType != Attendance.TYPE_UNKNOWN }) {
+            b.previewContainer.addView(TextView(contextWrapper).also {
+                it.setText(R.string.attendance_empty_text)
+            })
+        }
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/viewholder/EmptyViewHolder.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-5-4.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance.viewholder
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.RecyclerView
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.databinding.AttendanceItemEmptyBinding
+import pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceAdapter
+import pl.szczodrzynski.edziennik.ui.modules.attendance.models.AttendanceEmpty
+import pl.szczodrzynski.edziennik.ui.modules.grades.viewholder.BindableViewHolder
+
+class EmptyViewHolder(
+        inflater: LayoutInflater,
+        parent: ViewGroup,
+        val b: AttendanceItemEmptyBinding = AttendanceItemEmptyBinding.inflate(inflater, parent, false)
+) : RecyclerView.ViewHolder(b.root), BindableViewHolder<AttendanceEmpty, AttendanceAdapter> {
+    companion object {
+        private const val TAG = "EmptyViewHolder"
+    }
+
+    override fun onBind(activity: AppCompatActivity, app: App, item: AttendanceEmpty, position: Int, adapter: AttendanceAdapter) {
+
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/viewholder/MonthViewHolder.kt

@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-4-30.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance.viewholder
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.view.ContextThemeWrapper
+import androidx.core.view.isInvisible
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.RecyclerView
+import pl.szczodrzynski.edziennik.*
+import pl.szczodrzynski.edziennik.data.db.entity.Attendance
+import pl.szczodrzynski.edziennik.databinding.AttendanceItemContainerBarBinding
+import pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceAdapter
+import pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceAdapter.Companion.STATE_CLOSED
+import pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceView
+import pl.szczodrzynski.edziennik.ui.modules.attendance.models.AttendanceMonth
+import pl.szczodrzynski.edziennik.ui.modules.grades.viewholder.BindableViewHolder
+import pl.szczodrzynski.edziennik.utils.Themes
+import pl.szczodrzynski.edziennik.utils.models.Date
+
+class MonthViewHolder(
+        inflater: LayoutInflater,
+        parent: ViewGroup,
+        val b: AttendanceItemContainerBarBinding = AttendanceItemContainerBarBinding.inflate(inflater, parent, false)
+) : RecyclerView.ViewHolder(b.root), BindableViewHolder<AttendanceMonth, AttendanceAdapter> {
+    companion object {
+        private const val TAG = "MonthViewHolder"
+    }
+
+    override fun onBind(activity: AppCompatActivity, app: App, item: AttendanceMonth, position: Int, adapter: AttendanceAdapter) {
+        val manager = app.attendanceManager
+        val contextWrapper = ContextThemeWrapper(activity, Themes.appTheme)
+
+        b.title.text = listOf(
+                app.resources.getStringArray(R.array.material_calendar_months_array).getOrNull(item.month - 1)?.fixName(),
+                item.year.toString()
+        ).concat(" ")
+
+        b.dropdownIcon.rotation = when (item.state) {
+            STATE_CLOSED -> 0f
+            else -> 180f
+        }
+
+        b.unread.isVisible = item.hasUnseen
+
+        b.attendanceBar.setAttendanceData(item.typeCountMap.mapKeys { manager.getAttendanceColor(it.key) })
+
+        b.previewContainer.isInvisible = item.state != STATE_CLOSED
+        b.summaryContainer.isInvisible = item.state == STATE_CLOSED
+        b.percentage.isVisible = item.state == STATE_CLOSED
+
+        b.previewContainer.removeAllViews()
+
+        val sum = item.typeCountMap.entries.sumBy { it.value }.toFloat()
+        item.typeCountMap.forEach { (type, count) ->
+            val layout = LinearLayout(contextWrapper)
+            val attendance = Attendance(
+                    profileId = 0,
+                    id = 0,
+                    baseType = type,
+                    typeName = "",
+                    typeShort = manager.getTypeShort(type),
+                    typeSymbol = manager.getTypeShort(type),
+                    typeColor = manager.getAttendanceColor(type),
+                    date = Date(0, 0, 0),
+                    startTime = null,
+                    semester = 0,
+                    teacherId = 0,
+                    subjectId = 0,
+                    addedDate = 0
+            )
+            layout.addView(AttendanceView(contextWrapper, attendance, manager))
+            layout.addView(TextView(contextWrapper).also {
+                it.setText(R.string.attendance_percentage_format, count/sum*100f)
+                it.setPadding(0, 0, 5.dp, 0)
+            })
+            layout.setPadding(0, 8.dp, 0, 0)
+            b.previewContainer.addView(layout)
+        }
+
+        if (item.percentage == 0f) {
+            b.percentage.isVisible = false
+            b.percentage.text = null
+            b.summaryContainer.isVisible = false
+            b.summaryContainer.text = null
+        }
+        else {
+            b.percentage.setText(R.string.attendance_percentage_format, item.percentage)
+            b.summaryContainer.setText(R.string.attendance_period_summary_format, item.percentage)
+        }
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/attendance/viewholder/SubjectViewHolder.kt

@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2020-5-4.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.attendance.viewholder
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.view.ContextThemeWrapper
+import androidx.core.view.isInvisible
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.RecyclerView
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.data.db.entity.Attendance
+import pl.szczodrzynski.edziennik.databinding.AttendanceItemContainerBarBinding
+import pl.szczodrzynski.edziennik.dp
+import pl.szczodrzynski.edziennik.setText
+import pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceAdapter
+import pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceAdapter.Companion.STATE_CLOSED
+import pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceView
+import pl.szczodrzynski.edziennik.ui.modules.attendance.models.AttendanceSubject
+import pl.szczodrzynski.edziennik.ui.modules.grades.viewholder.BindableViewHolder
+import pl.szczodrzynski.edziennik.utils.Themes
+import pl.szczodrzynski.edziennik.utils.models.Date
+
+class SubjectViewHolder(
+        inflater: LayoutInflater,
+        parent: ViewGroup,
+        val b: AttendanceItemContainerBarBinding = AttendanceItemContainerBarBinding.inflate(inflater, parent, false)
+) : RecyclerView.ViewHolder(b.root), BindableViewHolder<AttendanceSubject, AttendanceAdapter> {
+    companion object {
+        private const val TAG = "SubjectViewHolder"
+    }
+
+    override fun onBind(activity: AppCompatActivity, app: App, item: AttendanceSubject, position: Int, adapter: AttendanceAdapter) {
+        val manager = app.attendanceManager
+        val contextWrapper = ContextThemeWrapper(activity, Themes.appTheme)
+
+        b.title.text = item.subjectName
+
+        b.dropdownIcon.rotation = when (item.state) {
+            STATE_CLOSED -> 0f
+            else -> 180f
+        }
+
+        b.unread.isVisible = item.hasUnseen
+
+        b.attendanceBar.setAttendanceData(item.typeCountMap.mapKeys { manager.getAttendanceColor(it.key) })
+
+        b.previewContainer.isInvisible = item.state != STATE_CLOSED
+        b.summaryContainer.isInvisible = item.state == STATE_CLOSED
+        b.percentage.isVisible = item.state == STATE_CLOSED
+
+        b.previewContainer.removeAllViews()
+
+        val sum = item.typeCountMap.entries.sumBy { it.value }.toFloat()
+        item.typeCountMap.forEach { (type, count) ->
+            val layout = LinearLayout(contextWrapper)
+            val attendance = Attendance(
+                    profileId = 0,
+                    id = 0,
+                    baseType = type,
+                    typeName = "",
+                    typeShort = manager.getTypeShort(type),
+                    typeSymbol = manager.getTypeShort(type),
+                    typeColor = manager.getAttendanceColor(type),
+                    date = Date(0, 0, 0),
+                    startTime = null,
+                    semester = 0,
+                    teacherId = 0,
+                    subjectId = 0,
+                    addedDate = 0
+            )
+            layout.addView(AttendanceView(contextWrapper, attendance, manager))
+            layout.addView(TextView(contextWrapper).also {
+                it.setText(R.string.attendance_percentage_format, count/sum*100f)
+                it.setPadding(0, 0, 5.dp, 0)
+            })
+            layout.setPadding(0, 8.dp, 0, 0)
+            b.previewContainer.addView(layout)
+        }
+
+        if (item.percentage == 0f) {
+            b.percentage.isVisible = false
+            b.percentage.text = null
+            b.summaryContainer.isVisible = false
+            b.summaryContainer.text = null
+        }
+        else {
+            b.percentage.setText(R.string.attendance_percentage_format, item.percentage)
+            b.summaryContainer.setText(R.string.attendance_period_summary_format, item.percentage)
+        }
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/grades/models/ExpandableItemModel.kt

@@ -6,7 +6,7 @@ package pl.szczodrzynski.edziennik.ui.modules.grades.models
 
 import pl.szczodrzynski.edziennik.ui.modules.grades.GradesAdapter.Companion.STATE_CLOSED
 
-abstract class ExpandableItemModel<T>(val items: MutableList<T>) {
+abstract class ExpandableItemModel<T>(open val items: MutableList<T>) {
     open var level: Int = 3
     var state: Int = STATE_CLOSED
 }

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/settings/SettingsNewFragment.java

@@ -52,6 +52,7 @@ import pl.szczodrzynski.edziennik.network.NetworkUtils;
 import pl.szczodrzynski.edziennik.sync.SyncWorker;
 import pl.szczodrzynski.edziennik.sync.UpdateWorker;
 import pl.szczodrzynski.edziennik.ui.dialogs.changelog.ChangelogDialog;
+import pl.szczodrzynski.edziennik.ui.dialogs.settings.AttendanceConfigDialog;
 import pl.szczodrzynski.edziennik.ui.dialogs.settings.GradesConfigDialog;
 import pl.szczodrzynski.edziennik.ui.dialogs.settings.ProfileRemoveDialog;
 import pl.szczodrzynski.edziennik.ui.dialogs.sync.NotificationFilterDialog;
@@ -885,6 +886,15 @@ public class SettingsNewFragment extends MaterialAboutFragment {
                             .color(IconicsColor.colorInt(iconColor))
             ).setOnClickAction(() -> new GradesConfigDialog(activity, false, null, null)));
 
+            items.add(new MaterialAboutActionItem(
+                    getString(R.string.menu_attendance_config),
+                    null,
+                    new IconicsDrawable(activity)
+                            .icon(CommunityMaterial.Icon.cmd_calendar_remove_outline)
+                            .size(IconicsSize.dp(iconSizeDp))
+                            .color(IconicsColor.colorInt(iconColor))
+            ).setOnClickAction(() -> new AttendanceConfigDialog(activity, false, null, null)));
+
             registerCardAllowRegistrationItem = new MaterialAboutSwitchItem(
                     getString(R.string.settings_register_allow_registration_text),
                     getString(R.string.settings_register_allow_registration_subtext),

app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/AttendanceManager.kt

@@ -19,10 +19,13 @@ class AttendanceManager(val app: App) : CoroutineScope {
     override val coroutineContext: CoroutineContext
         get() = job + Dispatchers.Default
 
+    val useSymbols
+        get() = app.config.forProfile().attendance.useSymbols
+
     fun getTypeShort(baseType: Int): String {
         return when (baseType) {
             Attendance.TYPE_PRESENT -> "ob"
-            Attendance.TYPE_PRESENT_CUSTOM -> "ob?"
+            Attendance.TYPE_PRESENT_CUSTOM -> "   "
             Attendance.TYPE_ABSENT -> "nb"
             Attendance.TYPE_ABSENT_EXCUSED -> "u"
             Attendance.TYPE_RELEASED -> "zw"
@@ -33,6 +36,26 @@ class AttendanceManager(val app: App) : CoroutineScope {
         }
     }
 
+    fun getAttendanceColor(baseType: Int): Int {
+        return when (baseType) {
+            Attendance.TYPE_PRESENT -> 0xff009688.toInt()
+            Attendance.TYPE_PRESENT_CUSTOM -> 0xff64b5f6.toInt()
+            Attendance.TYPE_ABSENT -> 0xffff3d00.toInt()
+            Attendance.TYPE_ABSENT_EXCUSED -> 0xff76ff03.toInt()
+            Attendance.TYPE_RELEASED -> 0xff9e9e9e.toInt()
+            Attendance.TYPE_BELATED -> 0xffffc107.toInt()
+            Attendance.TYPE_BELATED_EXCUSED -> 0xffffc107.toInt()
+            Attendance.TYPE_DAY_FREE -> 0xff43a047.toInt()
+            else -> 0xff64b5f6.toInt()
+        }
+    }
+    fun getAttendanceColor(attendance: Attendance): Int {
+        return (if (useSymbols) attendance.typeColor else null) ?: when (attendance.baseType) {
+            Attendance.TYPE_PRESENT_CUSTOM -> attendance.typeColor ?: 0xff64b5f6.toInt()
+            else -> getAttendanceColor(attendance.baseType)
+        }
+    }
+
     /*    _    _ _____    _____                 _  __ _
          | |  | |_   _|  / ____|               (_)/ _(_)
          | |  | | | |   | (___  _ __   ___  ___ _| |_ _  ___

app/src/main/res/layout/attendance_config_dialog.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Kuba Szczodrzyński 2020-5-4.
+  -->
+
+<layout xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:paddingStart="24dp"
+            android:paddingEnd="24dp">
+
+            <TextView
+                style="@style/TextAppearance.AppCompat.Small"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="16dp"
+                android:layout_marginBottom="8dp"
+                android:text="@string/attendance_config_title" />
+
+            <CheckBox
+                android:id="@+id/useSymbols"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:minHeight="32dp"
+                android:text="@string/attendance_config_use_symbols" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:paddingBottom="4dp"
+                android:text="@string/attendance_config_use_symbols_hint"
+                android:textAppearance="@style/NavView.TextView.Helper"
+                android:textSize="12sp"
+                android:textStyle="italic" />
+
+            <CheckBox
+                android:id="@+id/groupConsecutiveDays"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:minHeight="32dp"
+                android:text="@string/attendance_config_group_consecutive_days" />
+
+            <CheckBox
+                android:id="@+id/showPresenceInMonth"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:minHeight="32dp"
+                android:text="@string/attendance_config_show_presence_in_month"
+                android:visibility="gone" />
+        </LinearLayout>
+    </ScrollView>
+</layout>

app/src/main/res/layout/attendance_fragment.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Kuba Szczodrzyński 2020-4-30.
+  -->
+
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <pl.szczodrzynski.edziennik.utils.SwipeRefreshLayoutNoIndicator
+        android:id="@+id/refreshLayout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:orientation="vertical">
+
+            <com.google.android.material.tabs.TabLayout
+                android:id="@+id/tabLayout"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="@color/colorSurface_6dp"
+                app:tabIndicatorColor="?colorPrimary"
+                app:tabMode="auto"
+                app:tabSelectedTextColor="?colorPrimary"
+                app:tabTextColor="?android:textColorPrimary" />
+
+            <pl.szczodrzynski.edziennik.ui.modules.base.lazypager.LazyViewPager
+                android:id="@+id/viewPager"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                app:layout_behavior="@string/appbar_scrolling_view_behavior" />
+        </LinearLayout>
+    </pl.szczodrzynski.edziennik.utils.SwipeRefreshLayoutNoIndicator>
+</layout>

app/src/main/res/layout/attendance_item_attendance.xml

@@ -0,0 +1,95 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Kuba Szczodrzyński 2020-4-29.
+  -->
+
+<layout xmlns:tools="http://schemas.android.com/tools"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <data>
+        <import type="android.view.View"/>
+        <variable
+            name="simpleMode"
+            type="Boolean" />
+    </data>
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="?selectableItemBackground"
+        android:baselineAligned="false"
+        android:orientation="horizontal"
+        android:paddingVertical="8dp">
+
+        <pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceView
+            android:id="@+id/attendanceView"
+            android:layout_width="36dp"
+            android:layout_height="36dp"
+            android:layout_marginHorizontal="8dp"
+            android:layout_marginTop="4dp"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:background="@drawable/bg_rounded_8dp"
+            tools:backgroundTint="#f44336"
+            tools:gravity="center"
+            tools:text="nb"
+            tools:textSize="22sp" />
+
+        <TextView
+            android:id="@+id/type"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginHorizontal="8dp"
+            android:ellipsize="middle"
+            android:maxLines="2"
+            android:singleLine="true"
+            android:textAppearance="@style/NavView.TextView.Helper"
+            android:textSize="16sp"
+            app:layout_constraintEnd_toStartOf="@+id/unread"
+            app:layout_constraintStart_toEndOf="@+id/attendanceView"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:text="Nieobecność nieusprawiedliwiona" />
+
+
+        <TextView
+            android:id="@+id/subjectName"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginHorizontal="8dp"
+            android:ellipsize="middle"
+            android:maxLines="2"
+            android:singleLine="true"
+            android:textSize="16sp"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@+id/attendanceView"
+            app:layout_constraintTop_toBottomOf="@+id/type"
+            tools:text="Język angielski" />
+
+        <TextView
+            android:id="@+id/dateTime"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginHorizontal="8dp"
+            android:ellipsize="middle"
+            android:maxLines="2"
+            android:singleLine="true"
+            android:textSize="16sp"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@id/attendanceView"
+            app:layout_constraintTop_toBottomOf="@+id/subjectName"
+            tools:text="2 marca 2019 • 10:45 • lekcja 4" />
+
+        <View
+            android:id="@+id/unread"
+            android:layout_width="12dp"
+            android:layout_height="12dp"
+            android:layout_marginHorizontal="8dp"
+            android:background="@drawable/unread_red_circle"
+            android:visibility="gone"
+            app:layout_constraintBottom_toBottomOf="@+id/type"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:visibility="visible" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</layout>

app/src/main/res/layout/attendance_item_container.xml

@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Kuba Szczodrzyński 2020-4-30.
+  -->
+
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:background="?selectableItemBackground">
+
+        <View
+            android:layout_width="match_parent"
+            android:layout_height="1dp"
+            android:background="@drawable/divider"/>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <TextView
+                android:id="@+id/title"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_margin="8dp"
+                android:layout_weight="1"
+                android:ellipsize="end"
+                android:fontFamily="sans-serif"
+                android:maxLines="2"
+                android:textColor="?android:textColorPrimary"
+                android:textSize="20sp"
+                tools:text="2 marca - 3 marca" />
+
+            <View
+                android:id="@+id/unread"
+                android:layout_width="12dp"
+                android:layout_height="12dp"
+                android:layout_gravity="center_vertical"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:visibility="gone"
+                android:background="@drawable/unread_red_circle"
+                tools:visibility="visible"/>
+
+            <com.mikepenz.iconics.view.IconicsImageView
+                android:id="@+id/dropdownIcon"
+                android:layout_width="24dp"
+                android:layout_height="36dp"
+                android:layout_marginTop="8dp"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:scaleType="centerInside"
+                app:iiv_color="?android:textColorSecondary"
+                app:iiv_icon="cmd-chevron-down"
+                app:iiv_size="18dp"
+                tools:src="@android:drawable/ic_menu_more" />
+        </LinearLayout>
+
+        <FrameLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="8dp"
+            android:layout_marginLeft="8dp"
+            android:layout_marginBottom="8dp">
+
+            <LinearLayout
+                android:id="@+id/previewContainer"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:baselineAligned="false"
+                android:orientation="horizontal"
+                tools:visibility="visible" />
+
+            <TextView
+                android:id="@+id/summaryContainer"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_vertical"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:textSize="14sp"
+                android:visibility="gone"
+                tools:text="6 nieob. • 2 nieob. nieuspr. • 5 spóźnień"
+                tools:text1="Cały rok: 3 oceny • suma: 320 pkt"
+                tools:text2="Cały rok: 15 ocen • średnia: 2,62"
+                tools:visibility="visible" />
+        </FrameLayout>
+    </LinearLayout>
+</layout>

app/src/main/res/layout/attendance_item_container_bar.xml

@@ -0,0 +1,128 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Kuba Szczodrzyński 2020-5-1.
+  -->
+
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:background="?selectableItemBackground">
+
+        <View
+            android:layout_width="match_parent"
+            android:layout_height="1dp"
+            android:background="@drawable/divider"/>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <TextView
+                android:id="@+id/title"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_margin="8dp"
+                android:layout_weight="1"
+                android:ellipsize="end"
+                android:fontFamily="sans-serif"
+                android:maxLines="2"
+                android:textColor="?android:textColorPrimary"
+                android:textSize="20sp"
+                tools:text="Kwiecień 2020" />
+
+            <View
+                android:id="@+id/unread"
+                android:layout_width="12dp"
+                android:layout_height="12dp"
+                android:layout_gravity="center_vertical"
+                android:layout_marginEnd="4dp"
+                android:layout_marginRight="4dp"
+                android:visibility="gone"
+                android:background="@drawable/unread_red_circle"
+                tools:visibility="visible"/>
+
+            <TextView
+                android:id="@+id/percentage"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_vertical"
+                android:layout_marginEnd="4dp"
+                android:layout_marginRight="4dp"
+                tools:text="99,5%" />
+
+            <com.mikepenz.iconics.view.IconicsImageView
+                android:id="@+id/dropdownIcon"
+                android:layout_width="24dp"
+                android:layout_height="36dp"
+                android:layout_marginTop="8dp"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:scaleType="centerInside"
+                app:iiv_color="?android:textColorSecondary"
+                app:iiv_icon="cmd-chevron-down"
+                app:iiv_size="18dp"
+                tools:src="@android:drawable/ic_menu_more" />
+        </LinearLayout>
+
+        <pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceBar
+            android:id="@+id/attendanceBar"
+            android:layout_width="match_parent"
+            android:layout_height="20dp"
+            android:layout_marginHorizontal="8dp"/>
+
+        <FrameLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content">
+
+            <com.google.android.flexbox.FlexboxLayout
+                android:id="@+id/previewContainer"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginHorizontal="8dp"
+                android:orientation="horizontal"
+                android:visibility="gone"
+                app:flexWrap="wrap"
+                tools:visibility="visible">
+
+                <LinearLayout
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:paddingVertical="8dp">
+
+                    <pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        tools:background="@drawable/bg_rounded_4dp"
+                        tools:backgroundTint="#43a047"
+                        tools:layout_marginEnd="5dp"
+                        tools:layout_marginRight="5dp"
+                        tools:paddingHorizontal="5dp"
+                        tools:singleLine="true"
+                        tools:text="w"
+                        tools:textSize="14sp" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        tools:layout_marginEnd="5dp"
+                        tools:layout_marginRight="5dp"
+                        tools:text="6,8%" />
+                </LinearLayout>
+            </com.google.android.flexbox.FlexboxLayout>
+
+            <TextView
+                android:id="@+id/summaryContainer"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginHorizontal="8dp"
+                android:paddingVertical="8dp"
+                tools:text="Obecność w tym okresie: 100%" />
+        </FrameLayout>
+    </LinearLayout>
+</layout>

app/src/main/res/layout/attendance_item_empty.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Kuba Szczodrzyński 2020-5-4.
+  -->
+
+<layout xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_margin="8dp"
+            android:gravity="center"
+            android:textSize="18sp"
+            android:textColor="?android:textColorSecondary"
+            android:textStyle="italic"
+            android:text="@string/attendance_empty_text"/>
+    </LinearLayout>
+</layout>

app/src/main/res/layout/attendance_list_fragment.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Kuba Szczodrzyński 2020-4-30.
+  -->
+
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <pl.szczodrzynski.edziennik.utils.SwipeRefreshLayoutNoIndicator
+        android:id="@+id/refreshLayout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <FrameLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+
+            <ProgressBar
+                android:id="@+id/progressBar"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center" />
+
+            <androidx.appcompat.widget.AppCompatTextView
+                android:id="@+id/noData"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:drawablePadding="16dp"
+                android:fontFamily="sans-serif-light"
+                android:text="@string/attendances_no_data"
+                android:textSize="24sp"
+                android:visibility="gone"
+                app:drawableTopCompat="@drawable/ic_no_grades"
+                tools:visibility="visible" />
+
+            <androidx.recyclerview.widget.RecyclerView
+                android:id="@+id/list"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:visibility="gone"
+                tools:listitem="@layout/attendance_item_attendance"
+                tools:visibility="visible" />
+        </FrameLayout>
+    </pl.szczodrzynski.edziennik.utils.SwipeRefreshLayoutNoIndicator>
+</layout>

app/src/main/res/layout/attendance_summary_fragment.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Kuba Szczodrzyński 2020-5-4.
+  -->
+
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <pl.szczodrzynski.edziennik.utils.SwipeRefreshLayoutNoIndicator
+        android:id="@+id/refreshLayout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <FrameLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+
+            <ProgressBar
+                android:id="@+id/progressBar"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center" />
+
+            <androidx.appcompat.widget.AppCompatTextView
+                android:id="@+id/noData"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:drawablePadding="16dp"
+                android:fontFamily="sans-serif-light"
+                android:text="@string/attendances_no_data"
+                android:textSize="24sp"
+                android:visibility="gone"
+                app:drawableTopCompat="@drawable/ic_no_grades"
+                tools:visibility="visible" />
+
+            <androidx.recyclerview.widget.RecyclerView
+                android:id="@+id/list"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:visibility="gone"
+                tools:listitem="@layout/attendance_item_attendance"
+                tools:visibility="visible" />
+        </FrameLayout>
+    </pl.szczodrzynski.edziennik.utils.SwipeRefreshLayoutNoIndicator>
+</layout>

app/src/main/res/layout/grades_item_empty.xml

@@ -16,6 +16,6 @@
             android:textSize="18sp"
             android:textColor="?android:textColorSecondary"
             android:textStyle="italic"
-            android:text="Nie ma ocen w tym semestrze."/>
+            android:text="@string/grades_empty_text"/>
     </LinearLayout>
 </layout>

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

@@ -69,7 +69,7 @@
     <string name="attendances_absent">Nieobecności:</string>
     <string name="attendances_absent_unexcused">W tym nieusprawiedliwione:</string>
     <string name="attendances_belated">Spóźnienia:</string>
-    <string name="attendances_no_data">Brak nieobecności.</string>
+    <string name="attendances_no_data">Nie masz żadnych nieobecności.</string>
     <string name="attendances_present">Obecności:</string>
     <string name="attendances_releases">Zwolnienia:</string>
     <string name="attendances_summary_subject_loading_format">Wszystkie przedmioty</string>
@@ -1288,4 +1288,19 @@
     <string name="you_are_offline_title">Połączenie sieciowe</string>
     <string name="settings_add_student_text">Dodaj nowego ucznia</string>
     <string name="settings_add_student_subtext">Zaloguj konto ucznia/rodzica w aplikacji</string>
+    <string name="attendance_lesson_number_format">lekcja %d</string>
+    <string name="menu_attendance_config">Ustawienia frekwencji</string>
+    <string name="attendance_tab_days">Dni</string>
+    <string name="attendance_tab_months">Miesiące</string>
+    <string name="attendance_tab_summary">Podsumowanie</string>
+    <string name="attendance_tab_list">Lista</string>
+    <string name="attendance_period_summary_format">Obecność w tym okresie: %.2f%%</string>
+    <string name="attendance_percentage_format">%.2f%%</string>
+    <string name="grades_empty_text">Nie ma ocen w tym semestrze.</string>
+    <string name="attendance_empty_text">Nie ma tutaj żadnych nieobecności.</string>
+    <string name="attendance_config_title">Konfiguracja frekwencji</string>
+    <string name="attendance_config_use_symbols">Używaj symboli i kolorów wg dziennika</string>
+    <string name="attendance_config_group_consecutive_days">Grupuj kolejne dni na liście</string>
+    <string name="attendance_config_show_presence_in_month">Wyświetlaj obecność w widoku miesięcy</string>
+    <string name="attendance_config_use_symbols_hint">Widoczne po rozwinięciu listy</string>
 </resources>

build.gradle

@@ -17,7 +17,7 @@ buildscript {
         ]
 
         versions = [
-                gradleAndroid    : "4.0.0-beta03",
+                gradleAndroid    : '4.0.0-beta05',
 
                 kotlin           : ext.kotlin_version,
                 ktx              : "1.2.0",