update AboutActivity

3 month --> 3 months

.idea/compiler.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="17" />
+    <bytecodeTargetLevel target="18" />
   </component>
 </project>

.idea/deploymentTargetDropDown.xml

@@ -1,16 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="deploymentTargetDropDown">
-    <value>
-      <entry key="All Tests">
-        <State />
-      </entry>
-      <entry key="PSEActivity">
-        <State />
-      </entry>
-      <entry key="app">
-        <State />
-      </entry>
-    </value>
-  </component>
-</project>

.idea/gradle.xml

@@ -4,8 +4,10 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
+        <option name="testRunner" value="GRADLE" />
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleJvm" value="#GRADLE_LOCAL_JAVA_HOME" />
+        <option name="gradleJvm" value="18" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />

.idea/misc.xml

@@ -1,6 +1,6 @@
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="jbr-17" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_18" default="true" project-jdk-name="18" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

README.md

@@ -1,2 +1,32 @@
 # CleverClass
+CleverClass ist eine Android-App, die Schülern hilft, ihre Schulnoten zu verwalten, ihren Durchschnitt zu berechnen, den Vertretungsplan von DSBmobile einzusehen, den Stundenplan zu speichern und anzuzeigen sowie ein Periodensystem zu nutzen.
 
+## Funktionen und Verwendung
+- **Notenverwaltung:** Trage deine Schulnoten ein und berechne deinen Durchschnitt. Perfekt, um alle Noten aus der Schule übersichtlich zu speichern.
+- **Vertretungsplan:** Rufe den aktuellen Vertretungsplan von DSBmobile direkt in der App auf.
+- **Stundenplan:** Trage deinen Stundenplan ein, speichere und verwalte ihn in der App, um immer den Überblick zu behalten.
+- **Periodensystem:** Nutze das integrierte Periodensystem, um schnell Informationen zu chemischen Elementen nachzuschlagen.
+## Installation
+CleverClass kann einfach über den Play Store installiert werden oder durch das Herunterladen der APK-Datei:
+
+Play Store:
+- Öffne den Google Play Store auf deinem Android-Gerät
+- Suche nach "CleverClass"
+- Tippe auf "Installieren"
+
+APK-Datei:
+- Lade die APK-Datei von der [Website](https://google.com/) herunter
+- Öffne die heruntergeladene APK-Datei auf deinem Android-Gerät
+- Folge den Anweisungen auf dem Bildschirm, um die Installation abzuschließen
+## Anforderungen
+Betriebssystem: Android 8.0 oder neuer
+## Autoren
+- Paul Posch
+- Matthias Meyer
+- Jakub Szarko
+- Emilian Bührer
+## Lizenz
+Dieses Projekt steht unter der [GNU General Public License Version 3, 29 June 2007](LICENSE).
+
+## Sonstiges
+Dieses Projekt ist als Schulprojekt inerhalb von 3 Monaten entstanden.

app/build.gradle.kts

@@ -23,6 +23,7 @@ android {
     buildTypes {
         release {
             isMinifyEnabled = false
+            isDebuggable = false
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"
@@ -50,38 +51,21 @@ android {
 }
 
 dependencies {
-
     implementation("androidx.core:core-ktx:1.9.0")
     implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.7.0")
     implementation("androidx.activity:activity-compose:1.8.2")
-    implementation(platform("androidx.compose:compose-bom:2023.03.00"))
     implementation("androidx.compose.ui:ui")
     implementation("androidx.compose.ui:ui-graphics")
     implementation("androidx.compose.ui:ui-tooling-preview")
     implementation("androidx.compose.material3:material3")
-    implementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    implementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    implementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    implementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    implementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    implementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    implementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    implementation(platform("androidx.compose:compose-bom:2023.03.00"))
+    implementation("androidx.datastore:datastore-preferences:1.0.0")
+    implementation("com.google.code.gson:gson:2.9.0")
     implementation(platform("androidx.compose:compose-bom:2023.03.00"))
     testImplementation("junit:junit:4.13.2")
     androidTestImplementation("androidx.test.ext:junit:1.1.5")
     androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
-    androidTestImplementation(platform("androidx.compose:compose-bom:2023.03.00"))
     androidTestImplementation("androidx.compose.ui:ui-test-junit4")
     androidTestImplementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    androidTestImplementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    androidTestImplementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    androidTestImplementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    androidTestImplementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    androidTestImplementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    androidTestImplementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    androidTestImplementation(platform("androidx.compose:compose-bom:2023.03.00"))
-    androidTestImplementation(platform("androidx.compose:compose-bom:2023.03.00"))
     debugImplementation("androidx.compose.ui:ui-tooling")
     debugImplementation("androidx.compose.ui:ui-test-manifest")
 }

app/src/main/AndroidManifest.xml

@@ -2,6 +2,9 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
@@ -12,6 +15,21 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.CleverClass"
         tools:targetApi="31">
+        <activity
+            android:name=".DSBLoginActivity"
+            android:exported="false"
+            android:label="@string/title_activity_dsblogin"
+            android:theme="@style/Theme.CleverClass" />
+        <activity
+            android:name=".DSBDayViewActivity"
+            android:exported="false"
+            android:label="@string/title_activity_dsbday_view"
+            android:theme="@style/Theme.CleverClass" />
+        <activity
+            android:name=".DSBActivity"
+            android:exported="false"
+            android:label="@string/title_activity_dsbactivity"
+            android:theme="@style/Theme.CleverClass" />
         <activity
             android:name=".FachActivity"
             android:exported="false"
@@ -22,6 +40,11 @@
             android:exported="false"
             android:label="@string/title_activity_noten"
             android:theme="@style/Theme.CleverClass" />
+        <activity
+            android:name=".TimeTableSetupActivity"
+            android:exported="false"
+            android:label="@string/title_activity_timetable_setup"
+            android:theme="@style/Theme.CleverClass" />
         <activity
             android:name=".StundenplanActivity"
             android:exported="false"

app/src/main/java/com/schoolapp/cleverclass/AboutActivity.kt

@@ -1,9 +1,15 @@
 package com.schoolapp.cleverclass
 
+import android.content.Intent
+import android.net.Uri
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
@@ -14,6 +20,7 @@ import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material3.Divider
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
@@ -23,7 +30,11 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.ColorFilter
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
 
@@ -50,14 +61,16 @@ fun AboutContent(activity: ComponentActivity){
             colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.primaryContainer),
             title = {
                 Text(text = "About",
-                    style = MaterialTheme.typography.headlineSmall
+                    style = MaterialTheme.typography.headlineSmall,
+                    color = MaterialTheme.colorScheme.onPrimaryContainer
                 )},
             navigationIcon = {
                 IconButton(onClick = { activity.finish() }) {
                     Icon(
                         imageVector = Icons.Filled.ArrowBack,
                         contentDescription = null,
-                        modifier = Modifier.size(28.dp)
+                        modifier = Modifier.size(28.dp),
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer
                     )
                 }
             },
@@ -68,14 +81,46 @@ fun AboutContent(activity: ComponentActivity){
                 .verticalScroll(rememberScrollState())
                 .fillMaxWidth())
         {
-            Spacer(modifier = Modifier.height(16.dp))
-            Text(text = "This Product is published under the\nGNU General Public License\nVersion 3, 29 June 2007",
-                style = MaterialTheme.typography.bodySmall,
-                modifier = Modifier.padding(start = 16.dp, end = 16.dp))
+            AboutTextElement("This Product is published under the\nGNU General Public License\nVersion 3, 29 June 2007", 16.dp)
+            AboutTextElement("Developed by:\n- Paul Posch\n- Matthias Meyer\n- Jakub Szarko\n- Emilian Bührer", 32.dp)
+            AboutTextElement("Fun Facts:\nThis app consists of 4.189 lines of code\nThe repository is 768KB big\nThe development took about 3 months", 64.dp)
+
             Spacer(modifier = Modifier.height(32.dp))
-            Text(text = "Developed by:\n- Paul Posch\n- Matthias Meyer\n- Jakub Szarko\n- Emilian Bührer",
+            Divider()
+            Box(contentAlignment = Alignment.CenterStart,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .clickable {
+                        val intent =
+                            Intent(Intent.ACTION_VIEW, Uri.parse("https://ko-fi.com/cleverclass"))
+                        activity.startActivity(intent)
+                    }
+            ) {
+                Row {
+                    Text(
+                        text = "Support the Devs",
                         style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onBackground,
+                        modifier = Modifier.padding(16.dp)
+                    )
+                    Spacer(modifier = Modifier.weight(1f))
+                    Image(
+                        painter = painterResource(R.drawable.baseline_open_in_browser_24),
+                        contentDescription = null,
+                        colorFilter = ColorFilter.tint(MaterialTheme.colorScheme.onBackground),
+                        modifier = Modifier.padding(16.dp)
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun AboutTextElement(text: String, space: Dp){
+    Spacer(modifier = Modifier.height(space))
+    Text(text = text,
+        style = MaterialTheme.typography.bodySmall,
+        color = MaterialTheme.colorScheme.onBackground,
         modifier = Modifier.padding(start = 16.dp, end = 16.dp))
 }
-    }
-}

app/src/main/java/com/schoolapp/cleverclass/DSBActivity.kt

@@ -0,0 +1,254 @@
+package com.schoolapp.cleverclass
+
+import android.content.Context
+import android.content.Intent
+import android.content.SharedPreferences
+import android.graphics.BitmapFactory
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material.icons.filled.Refresh
+import androidx.compose.material3.Divider
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.compose.ui.unit.dp
+import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
+import com.schoolapp.cleverclass.ui.theme.MiddleColor
+import kotlinx.coroutines.DelicateCoroutinesApi
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import org.json.JSONObject
+import java.io.File
+
+
+class DSBActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val sharedPreferences = this.getSharedPreferences("DSBmobile", Context.MODE_PRIVATE)
+        val username = sharedPreferences.getString("username", "").toString()
+        val password = sharedPreferences.getString("password", "").toString()
+
+        setContent {
+            CleverClassTheme {
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background
+                ) {
+                    if(username.isEmpty() || password.isEmpty()) {
+                        val intent = Intent(this@DSBActivity, DSBLoginActivity::class.java).apply {
+                            putExtra(DSBLoginActivity.TYPE_KEY, "FirstTime")
+                        }
+                        startActivity(intent)
+                    }
+
+                    DSBContent(activity = this)
+                }
+            }
+        }
+    }
+}
+
+// Content of DSBmobile
+@OptIn(ExperimentalMaterial3Api::class, DelicateCoroutinesApi::class)
+@Composable
+fun DSBContent(activity: ComponentActivity){
+    val mainFolder = File(activity.filesDir, "dataDSB")
+    val sharedPreferences = activity.getSharedPreferences("DSBmobile", Context.MODE_PRIVATE)
+
+    var loadingState by remember {
+        mutableStateOf(-2)
+    }
+    var folders by remember {
+        mutableStateOf(mainFolder.listFiles())
+    }
+
+    LaunchedEffect(Unit) {
+        GlobalScope.launch(Dispatchers.IO) {
+            loadingState = downloadDSB(activity)
+            folders = mainFolder.listFiles()
+        }
+    }
+
+    Column {
+        TopAppBar(
+            colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.primaryContainer),
+            title = {
+                Text(text = "DSBmobile",
+                    style = MaterialTheme.typography.headlineSmall,
+                    color = MaterialTheme.colorScheme.onPrimaryContainer
+                )},
+            navigationIcon = {
+                IconButton(onClick = { activity.finish() }) {
+                    Icon(
+                        imageVector = Icons.Filled.ArrowBack,
+                        contentDescription = null,
+                        modifier = Modifier.size(28.dp),
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer
+                    )
+                }
+            },
+            actions = {
+                if(loadingState != -2) {
+                    IconButton(
+                        onClick = {
+                            loadingState = -2
+                            GlobalScope.launch(Dispatchers.IO) {
+                                loadingState = downloadDSB(activity)
+                                folders = mainFolder.listFiles()
+                            }
+                        }
+                    ) {
+                        Icon(
+                            imageVector = Icons.Filled.Refresh,
+                            contentDescription = null,
+                            modifier = Modifier.size(28.dp),
+                            tint = MaterialTheme.colorScheme.onPrimaryContainer
+                        )
+                    }
+                }
+            },
+            modifier = Modifier.fillMaxWidth()
+        )
+
+        when (loadingState) {
+            -2 -> {
+                LoadingScreen()
+            }
+            NO_INTERNET_CONNECTION_CODE -> {
+                DSBError("Keine Internetverbindung")
+            }
+            1 ->{
+                DSBError("Login fehlgeschlagen")
+            }
+            0 -> {
+                Column(
+                    horizontalAlignment = Alignment.CenterHorizontally,
+                    modifier = Modifier
+                        .verticalScroll(rememberScrollState())
+                        .fillMaxWidth()
+                ) {
+                    Spacer(modifier = Modifier.height(32.dp))
+
+                    folders.forEach { folder ->
+                        DayPrefab(folder, activity)
+                        Spacer(modifier = Modifier.height(32.dp))
+                        Divider()
+                        Spacer(modifier = Modifier.height(32.dp))
+                    }
+                }
+            }
+            else -> {
+                DSBError("Leider ist ein Problem aufgetreten\nFehlercode: $loadingState")
+            }
+        }
+    }
+
+    // changes state when Shared Preference is updated
+    val observer = remember {
+        SharedPreferences.OnSharedPreferenceChangeListener { _, key ->
+            if (key == "password" || key == "username") {
+                loadingState = -2
+
+                GlobalScope.launch(Dispatchers.IO) {
+                    loadingState = downloadDSB(activity)
+                    folders = mainFolder.listFiles()
+                }
+            }
+        }
+    }
+
+    // handles observer disposal
+    DisposableEffect(Unit) {
+        sharedPreferences.registerOnSharedPreferenceChangeListener(observer)
+        onDispose {
+            sharedPreferences.unregisterOnSharedPreferenceChangeListener(observer)
+        }
+    }
+}
+
+@Composable
+fun DSBError(message: String){
+    Box(
+        modifier = Modifier.fillMaxSize(),
+        contentAlignment = Alignment.Center
+    ){
+        Text(
+            text = message,
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onBackground
+        )
+    }
+}
+
+@Composable
+fun DayPrefab(folder: File, activity: Context){
+    Box(
+        contentAlignment = Alignment.Center,
+        modifier = Modifier
+            .fillMaxWidth()
+            .height(300.dp)
+            .clickable {
+                val intent = Intent(activity, DSBDayViewActivity::class.java).apply {
+                    putExtra(DSBDayViewActivity.FOLDER_KEY, folder.absolutePath)
+                }
+                activity.startActivity(intent)
+            }
+    ) {
+        val information = JSONObject(File(folder, "info.json").readText())
+        val previewImageBitmap = BitmapFactory.decodeFile(File(folder, "0.jpg").absolutePath)
+
+        Column(horizontalAlignment = Alignment.CenterHorizontally) {
+            Text(
+                text = "${information.get("FormatInfo")} - ${information.get("PlanInfo").toString().removeSuffix(".pdf")}",
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onBackground
+            )
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            Text(
+                text = information.get("Date").toString(),
+                style = MaterialTheme.typography.bodySmall,
+                color = MiddleColor
+            )
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            Image(
+                bitmap = previewImageBitmap.asImageBitmap(),
+                contentDescription = null
+            )
+        }
+    }
+}

app/src/main/java/com/schoolapp/cleverclass/DSBDayViewActivity.kt

@@ -0,0 +1,139 @@
+package com.schoolapp.cleverclass
+
+import android.graphics.BitmapFactory
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.gestures.detectTransformGestures
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.compose.ui.graphics.graphicsLayer
+import androidx.compose.ui.input.pointer.pointerInput
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.zIndex
+import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
+import org.json.JSONObject
+import java.io.File
+import java.lang.Float.max
+import java.lang.Float.min
+
+private lateinit var folder : File
+private lateinit var information : JSONObject
+
+class DSBDayViewActivity : ComponentActivity() {
+    companion object{
+        const val FOLDER_KEY = "folder_key"
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        folder = File(intent.getStringExtra(FOLDER_KEY) ?: "")
+        information = JSONObject(File(folder, "info.json").readText())
+
+        setContent {
+            CleverClassTheme {
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background
+                ) {
+                    DSBDayViewContent(activity = this)
+                }
+            }
+        }
+    }
+}
+
+// Content of DSBDayView
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun DSBDayViewContent(activity: ComponentActivity){
+    var scale by remember { mutableStateOf(1f) }
+    var XOffset by remember { mutableStateOf(0f) }
+    var YOffset by remember { mutableStateOf(0f) }
+
+    Column{
+        TopAppBar(
+            colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.primaryContainer),
+            title = {
+                Text(
+                    text = information.get("PlanInfo").toString().removeSuffix(".pdf"),
+                    style = MaterialTheme.typography.headlineSmall,
+                    color = MaterialTheme.colorScheme.onPrimaryContainer
+                )},
+            navigationIcon = {
+                IconButton(onClick = { activity.finish() }) {
+                    Icon(
+                        imageVector = Icons.Filled.ArrowBack,
+                        contentDescription = null,
+                        modifier = Modifier.size(28.dp),
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer
+                    )
+                }
+            },
+            modifier = Modifier
+                .fillMaxWidth()
+                .zIndex(1f)
+        )
+
+        val imageFiles = folder.listFiles { file -> file.extension == "jpg" }?.toList()
+
+        LazyColumn(
+            userScrollEnabled = true,
+            modifier = Modifier
+                .padding(8.dp)
+                .pointerInput(Unit) {
+                    detectTransformGestures { _, move, zoom, _ ->
+                        scale = max(min(zoom * scale, 2f), 1f)
+                        val maxXOffset = 520 * (scale - 1)
+                        val maxYOffset = 992 * (scale - 1)
+                        XOffset = max(min(XOffset + move.x, maxXOffset), -maxXOffset)
+                        YOffset = max(min(YOffset + move.y, maxYOffset), -maxYOffset)
+                    }
+                }
+                .graphicsLayer(
+                    scaleX = scale,
+                    scaleY = scale,
+                    translationX = XOffset,
+                    translationY = YOffset
+                )
+        ) {
+            imageFiles?.forEach {
+                item {
+                    Image(
+                        bitmap = BitmapFactory.decodeFile(it.absolutePath).asImageBitmap(),
+                        contentDescription = null,
+                        contentScale = ContentScale.FillWidth,
+                        modifier = Modifier.fillMaxWidth()
+                    )
+                    Spacer(modifier = Modifier.height(8.dp))
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/schoolapp/cleverclass/DSBDownloader.kt

@@ -0,0 +1,226 @@
+package com.schoolapp.cleverclass
+
+import android.content.Context
+import android.net.ConnectivityManager
+import android.net.NetworkCapabilities
+import android.util.Base64
+import android.util.Log
+import org.json.JSONObject
+import java.io.ByteArrayOutputStream
+import java.io.File
+import java.net.HttpURLConnection
+import java.net.URL
+import java.util.zip.GZIPInputStream
+import java.util.zip.GZIPOutputStream
+import java.io.ByteArrayInputStream
+import java.io.FileOutputStream
+import java.net.SocketException
+import java.time.LocalDateTime
+import java.util.UUID
+
+
+suspend fun downloadDSB(context: Context): Int{
+    val sharedPreferences = context.getSharedPreferences("DSBmobile", Context.MODE_PRIVATE)
+    val username = sharedPreferences.getString("username", "").toString()
+    val password = sharedPreferences.getString("password", "").toString()
+
+    if(!isInternetAvailable(context))
+        return NO_INTERNET_CONNECTION_CODE
+
+    val mainDir = createDataFolder(context)
+
+    val response = downloadDataTask(username = username, password = password)
+    if(response == "-1")
+        return NO_INTERNET_CONNECTION_CODE
+    val jsonResponse = JSONObject(response)
+    if(jsonResponse.get("Resultcode") != 0)
+        return jsonResponse.getInt("Resultcode")
+
+    return downloadImagesTask(jsonResponse, mainDir)
+}
+
+private fun downloadDataTask(username: String, password: String) : String {
+    return try {
+        val requestBody = createRequestBody(username = username, password = password)
+        val jsonRequest = createJsonRequest(requestBody)
+
+        val responseData = fetchData(jsonRequest)
+
+        responseData
+    } catch (e: Exception) {
+        Log.e("HTTP", "Error: ${e.message}")
+        "-1"
+    }
+}
+
+private fun createRequestBody(username: String, password: String): String {
+    val currentDateTime = LocalDateTime.now().toString()
+
+    val requestBody = JSONObject().apply {
+        put("UserId", username)
+        put("UserPw", password)
+        put("AppVersion", "2.5.9")
+        put("Language", "de")
+        put("OsVersion", "28 8.0")
+        put("AppId", UUID.randomUUID().toString())
+        put("Device", "SM-G930F")
+        put("BundleId", "de.heinekingmedia.dsbmobile")
+        put("Date", currentDateTime)
+        put("LastUpdate", currentDateTime)
+    }
+
+    return Base64.encodeToString(GZIPCompress(requestBody.toString().toByteArray()), Base64.DEFAULT)
+}
+
+private fun createJsonRequest(requestBody: String): JSONObject {
+    return JSONObject().apply {
+        put("req", JSONObject().apply {
+            put("Data", requestBody)
+            put("DataType", 1)
+        })
+    }
+}
+
+private fun fetchData(jsonRequest: JSONObject): String {
+    val url = URL("https://app.dsbcontrol.de/JsonHandler.ashx/GetData")
+    val connection = (url.openConnection() as HttpURLConnection).apply {
+        requestMethod = "POST"
+        setRequestProperty("Content-Type", "application/json")
+        doOutput = true
+    }
+
+    connection.outputStream.use { outputStream ->
+        outputStream.write(jsonRequest.toString().toByteArray())
+    }
+
+    return if (connection.responseCode == HttpURLConnection.HTTP_OK) {
+        val responseData = connection.inputStream.bufferedReader().use { it.readText() }
+        val compressedResponseData = JSONObject(responseData).getString("d")
+        decompressGZIPAndDecodeBase64(compressedResponseData)
+    } else {
+        Log.e("HTTP", "Error response code: ${connection.responseCode}")
+        ""
+    }
+}
+
+private fun GZIPCompress(data: ByteArray): ByteArray {
+    return ByteArrayOutputStream().use { outputStream ->
+        GZIPOutputStream(outputStream).bufferedWriter().use { it.write(String(data)) }
+        outputStream.toByteArray()
+    }
+}
+
+private fun decompressGZIPAndDecodeBase64(compressedData: String): String {
+    val compressedByteArray = Base64.decode(compressedData, Base64.DEFAULT)
+    val inputStream = ByteArrayInputStream(compressedByteArray)
+    val outputStream = ByteArrayOutputStream()
+    GZIPInputStream(inputStream).use { gzipInputStream ->
+        val buffer = ByteArray(1024)
+        var len: Int
+        while (gzipInputStream.read(buffer).also { len = it } > 0) {
+            outputStream.write(buffer, 0, len)
+        }
+    }
+    return outputStream.toString("UTF-8")
+}
+
+private fun downloadImagesTask(jsonResponse: JSONObject, mainDir : File) : Int {
+    clearFolder(mainDir)
+
+    var jsonDaysObject = jsonResponse.getJSONArray("ResultMenuItems")
+    for (i in 0 until jsonDaysObject.length()) {
+        if (jsonDaysObject.getJSONObject(i).get("Index") == 0) {
+            jsonDaysObject = jsonDaysObject.getJSONObject(i).getJSONArray("Childs")
+            break
+        }
+    }
+    for (i in 0 until jsonDaysObject.length()) {
+        if (jsonDaysObject.getJSONObject(i).get("Index") == 0) {
+            jsonDaysObject = jsonDaysObject.getJSONObject(i).getJSONObject("Root").getJSONArray("Childs")
+            break
+        }
+    }
+
+    for (d in 0 until jsonDaysObject.length()) {
+        val jsonDayObject = jsonDaysObject.getJSONObject(d)
+        val dayID = jsonDayObject.get("Id")
+
+        val day = File(mainDir, dayID.toString())
+        day.mkdir()
+        createDayInformationJson(day, jsonDayObject)
+
+        val jsonPagesObject = jsonDayObject.getJSONArray("Childs")
+
+        for (p in 0 until jsonPagesObject.length()) {
+            val jsonPageObject = jsonPagesObject.getJSONObject(p)
+            val pageIndex = jsonPageObject.get("Index")
+            val imageLink = jsonPageObject.get("Detail").toString()
+
+            val downloadState = downloadImage(day, URL(imageLink), "$pageIndex.jpg")
+            if (downloadState != 0)
+                return downloadState
+        }
+    }
+    return 0
+}
+
+private fun createDayInformationJson(folder: File, jsonDayObject: JSONObject){
+    val infoFile = File(folder, "info.json")
+    val date = jsonDayObject.get("Date")
+    val formatInfo = jsonDayObject.get("Title")
+    val planInfo = jsonDayObject.getJSONArray("Childs").getJSONObject(0).get("Title")
+
+    val infoJson = JSONObject()
+    infoJson.put("Date", date)
+    infoJson.put("FormatInfo", formatInfo)
+    infoJson.put("PlanInfo", planInfo)
+
+    infoFile.writeText(infoJson.toString())
+}
+
+private fun downloadImage(folder: File, url: URL, fileName: String) : Int {
+    val file = File(folder, fileName)
+
+    try {
+        val connection = url.openConnection()
+        val inputStream = connection.getInputStream()
+        val outputStream = FileOutputStream(file)
+
+        val buffer = ByteArray(1024)
+        var bytesRead: Int
+
+        while (inputStream.read(buffer).also { bytesRead = it } != -1) {
+            outputStream.write(buffer, 0, bytesRead)
+        }
+
+        inputStream.close()
+        outputStream.close()
+    }
+    catch (e: SocketException){
+        Log.d("ImageDownloader", e.toString())
+        return NO_INTERNET_CONNECTION_CODE
+    }
+    return 0
+}
+
+private fun createDataFolder(context: Context) : File {
+    val folderName = "dataDSB"
+    val folder = File(context.filesDir, folderName)
+
+    if (!folder.exists()) {
+        folder.mkdir()
+    }
+    return folder
+}
+
+private fun isInternetAvailable(context: Context): Boolean {
+    val connectivityManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+    val network = connectivityManager.activeNetwork
+    return try {
+        val networkCapabilities = connectivityManager.getNetworkCapabilities(network)
+        networkCapabilities?.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) ?: false
+    } catch (e: SecurityException) {
+        Log.e("Internet", e.toString())
+        false
+    }
+}

app/src/main/java/com/schoolapp/cleverclass/DSBLoginActivity.kt

@@ -0,0 +1,316 @@
+package com.schoolapp.cleverclass
+
+import android.content.Context
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.text.selection.TextSelectionColors
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material.icons.outlined.Delete
+import androidx.compose.material.icons.outlined.Info
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextFieldDefaults
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.text.input.VisualTransformation
+import androidx.compose.ui.unit.dp
+import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
+import com.schoolapp.cleverclass.ui.theme.InputPrimaryColor
+import com.schoolapp.cleverclass.ui.theme.InputSecondaryColor
+
+private lateinit var activityType : String
+
+class DSBLoginActivity : ComponentActivity() {
+    companion object{
+        const val TYPE_KEY = "type_key"
+    }
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        activityType = intent.getStringExtra(TYPE_KEY).toString()
+
+        setContent {
+            CleverClassTheme {
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background
+                ) {
+                    DSBLoginContent(activity = this)
+                }
+            }
+        }
+    }
+}
+
+
+// Content of DSBLogin
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun DSBLoginContent(activity: ComponentActivity){
+    val inputFieldColors = TextFieldDefaults.outlinedTextFieldColors(
+        textColor = MaterialTheme.colorScheme.onPrimaryContainer,
+        containerColor = MaterialTheme.colorScheme.secondaryContainer,
+        cursorColor = InputPrimaryColor,
+        selectionColors = TextSelectionColors(
+            handleColor = InputPrimaryColor,
+            backgroundColor = InputSecondaryColor
+        ),
+        focusedBorderColor = InputSecondaryColor,
+        unfocusedBorderColor = Color.Transparent
+    )
+
+    val sharedPreferences = activity.getSharedPreferences("DSBmobile", Context.MODE_PRIVATE)
+    val editor = sharedPreferences.edit()
+
+    var username by remember {
+        mutableStateOf(sharedPreferences.getString("username", "").toString())
+    }
+    var password by remember {
+        mutableStateOf(sharedPreferences.getString("password", "").toString())
+    }
+    var showPassword by remember {
+        mutableStateOf(false)
+    }
+
+    var showInfo by remember {
+        mutableStateOf(false)
+    }
+    var showDeleteConfirmation by remember {
+        mutableStateOf(false)
+    }
+
+    Column {
+        TopAppBar(
+            colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.primaryContainer),
+            title = { Text(text = "") },
+            navigationIcon = {
+                IconButton(onClick = { activity.finish() }) {
+                    Icon(
+                        imageVector = Icons.Filled.ArrowBack,
+                        contentDescription = null,
+                        modifier = Modifier.size(28.dp),
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer
+                    )
+                }
+            },
+            modifier = Modifier.fillMaxWidth()
+        )
+
+        Column(
+            verticalArrangement = Arrangement.Center,
+            modifier = Modifier
+                .fillMaxHeight()
+                .verticalScroll(rememberScrollState())
+        ) {
+            Surface(
+                color = MaterialTheme.colorScheme.primaryContainer,
+                shape = RoundedCornerShape(20),
+                modifier = Modifier.padding(16.dp)
+            ) {
+                Column(horizontalAlignment = Alignment.CenterHorizontally,
+                    modifier = Modifier.padding(16.dp)
+                ) {
+                    Row(verticalAlignment = Alignment.CenterVertically) {
+                        Text(
+                            text = "DSBmobile Login Daten",
+                            style = MaterialTheme.typography.labelMedium,
+                            color = MaterialTheme.colorScheme.onPrimaryContainer,
+                            modifier = Modifier.padding(10.dp)
+                        )
+                        
+                        Spacer(modifier = Modifier.weight(1f))
+                        
+                        if (activityType == "Settings")
+                            IconButton(onClick = { showDeleteConfirmation = !showDeleteConfirmation }) {
+                                Icon(
+                                    imageVector = Icons.Outlined.Delete,
+                                    contentDescription = null,
+                                    modifier = Modifier.size(28.dp),
+                                    tint = MaterialTheme.colorScheme.onPrimaryContainer
+                                )
+                            }
+                        else if (activityType == "FirstTime")
+                            IconButton(onClick = { showInfo = !showInfo }) {
+                                Icon(
+                                    imageVector = Icons.Outlined.Info,
+                                    contentDescription = null,
+                                    tint = MaterialTheme.colorScheme.onPrimaryContainer
+                                )
+                            }
+                    }
+                    
+                    Spacer(modifier = Modifier.height(16.dp))
+
+                    OutlinedTextField(
+                        value = username,
+                        onValueChange = { username = it },
+                        placeholder = {
+                            Text(
+                                text = "Benutzername",
+                                style = MaterialTheme.typography.labelMedium,
+                                color = MaterialTheme.colorScheme.primaryContainer
+                            )
+                        },
+                        modifier = Modifier.fillMaxWidth(),
+                        singleLine = true,
+                        shape = RoundedCornerShape(20),
+                        textStyle = MaterialTheme.typography.labelMedium,
+                        colors = inputFieldColors
+                    )
+
+                    Spacer(modifier = Modifier.height(16.dp))
+
+                    OutlinedTextField(
+                        value = password,
+                        onValueChange = { password = it },
+                        placeholder = {
+                            Text(
+                                text = "Passwort",
+                                style = MaterialTheme.typography.labelMedium,
+                                color = MaterialTheme.colorScheme.primaryContainer
+                            )
+                        },
+                        modifier = Modifier.fillMaxWidth(),
+                        singleLine = true,
+                        shape = RoundedCornerShape(20),
+                        textStyle = MaterialTheme.typography.labelMedium,
+                        colors = inputFieldColors,
+                        visualTransformation = if(showPassword) VisualTransformation.None else PasswordVisualTransformation(),
+                        keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Password),
+                        trailingIcon = {
+                            IconButton(onClick = { showPassword = !showPassword })
+                            {
+                                Image(
+                                    painter = painterResource(
+                                        id = if(showPassword)
+                                            R.drawable.baseline_visibility_24
+                                        else
+                                            R.drawable.baseline_visibility_off_24
+                                    ),
+                                    contentDescription = null,
+                                )
+                            }
+                        }
+                    )
+
+                    Spacer(modifier = Modifier.height(10.dp))
+
+                    Box(
+                        contentAlignment = Alignment.Center,
+                        modifier = Modifier.clickable {
+                            editor.putString("username", username)
+                            editor.putString("password", password)
+                            editor.apply()
+                            activity.finish()
+                        }
+                    ) {
+                        Text(
+                            text = "Speichern",
+                            color = MaterialTheme.colorScheme.secondary,
+                            style = MaterialTheme.typography.labelMedium,
+                            modifier = Modifier.padding(10.dp)
+                        )
+                    }
+                }
+            }
+        }
+    }
+
+    if (showInfo) {
+        AlertDialog(
+            onDismissRequest = { showInfo = false },
+            text = {
+                Text(
+                    text = "Der Benutzername und das Passwort können später in den Einstellungen geändert werden",
+                    color = MaterialTheme.colorScheme.onPrimaryContainer,
+                    style = MaterialTheme.typography.labelMedium)
+            },
+            confirmButton = {
+                Text(
+                    text = "Schließen",
+                    color = MaterialTheme.colorScheme.secondary,
+                    style = MaterialTheme.typography.labelMedium,
+                    modifier = Modifier.clickable { showInfo = false }
+                )
+            },
+            containerColor = MaterialTheme.colorScheme.primaryContainer,
+            modifier = Modifier
+                .padding(5.dp)
+        )
+    }
+
+    if (showDeleteConfirmation) {
+        AlertDialog(
+            onDismissRequest = { showDeleteConfirmation = false },
+            text = {
+                Text(
+                    text = "Möchten Sie wirklich die Anmeldedaten löschen?",
+                    color = MaterialTheme.colorScheme.onPrimaryContainer,
+                    style = MaterialTheme.typography.labelMedium
+                )
+            },
+            confirmButton = {
+                Row(modifier = Modifier.fillMaxWidth()){
+                    Text(
+                        text = "Bestätigen",
+                        color = MaterialTheme.colorScheme.secondary,
+                        style = MaterialTheme.typography.labelMedium,
+                        modifier = Modifier.clickable {
+                            editor.putString("username", "")
+                            editor.putString("password", "")
+                            editor.apply()
+                            showDeleteConfirmation = false
+                            activity.finish()
+                        }
+                    )
+
+                    Spacer(modifier = Modifier.weight(1f))
+
+                    Text(
+                        text = "Abbrechen",
+                        color = MaterialTheme.colorScheme.secondary,
+                        style = MaterialTheme.typography.labelMedium,
+                        modifier = Modifier.clickable { showDeleteConfirmation = false }
+                    )
+                }
+            },
+            containerColor = MaterialTheme.colorScheme.primaryContainer
+        )
+    }
+}

app/src/main/java/com/schoolapp/cleverclass/FachActivity.kt

@@ -1,5 +1,7 @@
 package com.schoolapp.cleverclass
 
+import android.content.Context
+import android.content.SharedPreferences.Editor
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
@@ -20,9 +22,12 @@ import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Add
 import androidx.compose.material.icons.filled.ArrowBack
-import androidx.compose.material.icons.filled.Close
+import androidx.compose.material.icons.filled.Check
 import androidx.compose.material.icons.filled.KeyboardArrowDown
 import androidx.compose.material.icons.filled.KeyboardArrowUp
+import androidx.compose.material.icons.outlined.Delete
+import androidx.compose.material.icons.outlined.Edit
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.BottomAppBar
 import androidx.compose.material3.DropdownMenu
 import androidx.compose.material3.DropdownMenuItem
@@ -37,6 +42,8 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -45,18 +52,46 @@ import androidx.compose.ui.Alignment.Companion.CenterVertically
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.dp
+import com.schoolapp.cleverclass.GradeStoreManager.getGrades
+import com.schoolapp.cleverclass.GradeStoreManager.saveGrades
 import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
 import com.schoolapp.cleverclass.ui.theme.TextOnColouredButton
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+
+
+private var SAWeight = 0
+private var name = "Test"
+
+private var typesSelection = listOf("Test", "Ex", "Referat", "Mündlich", "Sonstiges")
+private val gradesSelection = listOf(1, 2, 3, 4, 5, 6)
+private val weightsSelection = listOf(0.5f, 1f, 1.5f, 2f)
 
 class FachActivity : ComponentActivity() {
     companion object {
-        const val ARGUMENT_KEY = "argument_key"
+        const val NAME_KEY = "name_key"
+        const val WEIGHT_KEY = "weight_key"
     }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        // get subject argument from NotenActivity
-        val name = intent.getStringExtra(ARGUMENT_KEY) ?: "missing subject"
+        var grades = emptyList<GradeData>()
+
+        // get arguments from NotenActivity
+        name = intent.getStringExtra(NAME_KEY) ?: "missing subject"
+        SAWeight = intent.getIntExtra(WEIGHT_KEY, 0)
+
+        if(SAWeight != 0 && typesSelection[0] != "Schulaufgabe")
+            typesSelection = listOf("Schulaufgabe") + typesSelection
+
+        CoroutineScope(Dispatchers.IO).launch {
+            getGrades(this@FachActivity, name).collect { savedGrades ->
+                 grades = savedGrades.toMutableList()
+            }
+        }
+
 
         setContent {
             CleverClassTheme {
@@ -64,7 +99,7 @@ class FachActivity : ComponentActivity() {
                     modifier = Modifier.fillMaxSize(),
                     color = MaterialTheme.colorScheme.background
                 ) {
-                    GradeContent(activity = this, name = name)
+                    GradeContent(this, grades)
                 }
             }
         }
@@ -73,7 +108,21 @@ class FachActivity : ComponentActivity() {
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
-fun GradeContent(activity: ComponentActivity, name : String){
+fun GradeContent(activity: ComponentActivity, loadedGrades: List<GradeData>){
+    val sharedPreferences = activity.getSharedPreferences("gradeAverages", Context.MODE_PRIVATE)
+    val editor = sharedPreferences.edit()
+
+    var grades by remember {
+        mutableStateOf(loadedGrades)
+    }
+    var average by remember {
+        mutableStateOf(0.00f)
+    }
+
+    var showDeleteConfirmation by remember {
+        mutableStateOf(false)
+    }
+
     val colors = listOf(
         Color(0xFF536DFE),
         Color(0xFF448AFF),
@@ -82,8 +131,15 @@ fun GradeContent(activity: ComponentActivity, name : String){
         Color(0xFF64FFDA),
         Color(0xFF69F0AE)
     )
-    var grades by remember {
-        mutableStateOf(emptyList<GradeData>())
+
+    LaunchedEffect(grades) {
+        average = calculateAverage(grades, editor)
+    }
+
+    DisposableEffect(activity) {
+        onDispose {
+            saveGradesStart(activity, grades)
+        }
     }
 
     Scaffold(
@@ -92,14 +148,30 @@ fun GradeContent(activity: ComponentActivity, name : String){
                 colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.primaryContainer),
                 title = {
                     Text(text = name,
-                        style = MaterialTheme.typography.headlineSmall
+                        style = MaterialTheme.typography.headlineSmall,
+                        color = MaterialTheme.colorScheme.onPrimaryContainer
                     )},
                 navigationIcon = {
-                    IconButton(onClick = { activity.finish() }) {
+                    IconButton(onClick = {
+                        typesSelection = listOf("Test", "Ex", "Referat", "Mündlich", "Sonstiges")
+                        saveGradesStart(activity, grades)
+                        activity.finish()
+                    }) {
                         Icon(
                             imageVector = Icons.Filled.ArrowBack,
                             contentDescription = null,
-                            modifier = Modifier.size(28.dp)
+                            modifier = Modifier.size(28.dp),
+                            tint = MaterialTheme.colorScheme.onPrimaryContainer
+                        )
+                    }
+                },
+                actions = {
+                          IconButton(onClick = { showDeleteConfirmation = true }) {
+                              Icon(
+                                  imageVector = Icons.Outlined.Delete,
+                                  contentDescription = null,
+                                  modifier = Modifier.size(28.dp),
+                                  tint = MaterialTheme.colorScheme.onPrimaryContainer
                               )
                           }
                 },
@@ -120,7 +192,8 @@ fun GradeContent(activity: ComponentActivity, name : String){
                     Text(text = "Schnitt:",
                         style = MaterialTheme.typography.headlineSmall)
                     Spacer(modifier = Modifier.weight(1f))
-                    Text(text = "Ø0.00",
+                    Text(
+                        text = "Ø" + formatFloat(average),
                         style = MaterialTheme.typography.headlineSmall)
                     Spacer(modifier = Modifier.width(16.dp))
                 }
@@ -128,7 +201,12 @@ fun GradeContent(activity: ComponentActivity, name : String){
         },
         floatingActionButton = {
             FloatingActionButton(
-                onClick = { grades = grades + GradeData(grades.size, colors.random()) },
+                onClick = { grades = grades + GradeData(
+                    if (grades.isEmpty()) 0 else grades[grades.size - 1].id + 1,
+                    colors.random(),
+                    1,
+                    1.0f,
+                    "Typ") },
                 shape = RoundedCornerShape(40)
             ) {
             Icon(imageVector = Icons.Filled.Add,
@@ -142,23 +220,102 @@ fun GradeContent(activity: ComponentActivity, name : String){
             .verticalScroll(rememberScrollState()))
         {
             grades.forEach{ gradeData ->
-                GradePrefab(onClose = { grades = grades.filter { it != gradeData } }, color = gradeData.color)
+                GradePrefab(
+                    id = gradeData.id,
+                    onClose = {
+                        grades = grades.filter { it.id != gradeData.id }
+                        saveGradesStart(activity, grades) },
+                    type = gradeData.type,
+                    grade = gradeData.grade,
+                    weight = gradeData.weight,
+                    color = gradeData.color,
+                    onGradeChange = { grade ->
+                        grades.find { it.id == gradeData.id }?.grade = grade
+                        average = calculateAverage(grades, editor)
+                        saveGradesStart(activity, grades) },
+                    onWeightChange = { weight ->
+                        grades.find { it.id == gradeData.id }?.weight = weight
+                        average = calculateAverage(grades, editor)
+                        saveGradesStart(activity, grades) },
+                    onTypeChange = { type ->
+                        grades.find { it.id == gradeData.id }?.type = type
+                        average = calculateAverage(grades, editor)
+                        saveGradesStart(activity, grades) }
+                    )
+            }
+            Spacer(modifier = Modifier.height(216.dp))
         }
     }
+
+    if (showDeleteConfirmation){
+        AlertDialog(
+            onDismissRequest = { showDeleteConfirmation = false },
+            text = { Text(text = "Möchten Sie wirklich alle Noten löschen?", color = MaterialTheme.colorScheme.onPrimaryContainer, style = MaterialTheme.typography.labelMedium) },
+            confirmButton = {
+                Row(modifier = Modifier.fillMaxWidth()){
+                    Text(
+                        text = "Bestätigen",
+                        color = MaterialTheme.colorScheme.secondary,
+                        style = MaterialTheme.typography.labelMedium,
+                        modifier = Modifier.clickable {
+                            grades = emptyList()
+                            saveGradesStart(activity, grades)
+                            editor.putFloat(name, 0.0f).apply()
+                            showDeleteConfirmation = false
+                        }
+                    )
+
+                    Spacer(modifier = Modifier.weight(1f))
+
+                    Text(
+                        text = "Abbrechen",
+                        color = MaterialTheme.colorScheme.secondary,
+                        style = MaterialTheme.typography.labelMedium,
+                        modifier = Modifier.clickable { showDeleteConfirmation = false }
+                    )
+                }
+            },
+            containerColor = MaterialTheme.colorScheme.primaryContainer
+        )
     }
 }
 
 @Composable
-fun GradePrefab(onClose: () -> Unit, color: Color){
-    var typeExpanded by remember {
+fun GradePrefab(
+    id: Int,
+    onClose: () -> Unit,
+    type: String,
+    grade: Int,
+    weight: Float,
+    color: Color,
+    onGradeChange: (grade: Int) -> Unit,
+    onWeightChange: (weight: Float) -> Unit,
+    onTypeChange: (type: String) -> Unit,
+){
+
+    var editing by remember(id) {
         mutableStateOf(false)
     }
-    var gradeExpanded by remember {
+
+    var typeExpanded by remember(id) {
         mutableStateOf(false)
     }
-    var weightExpanded by remember {
+    var gradeExpanded by remember(id) {
         mutableStateOf(false)
     }
+    var weightExpanded by remember(id) {
+        mutableStateOf(false)
+    }
+
+    var selectedType by remember(id) {
+        mutableStateOf(type)
+    }
+    var selectedGrade by remember(id) {
+        mutableStateOf(grade)
+    }
+    var selectedWeight by remember(id) {
+        mutableStateOf(weight)
+    }
 
     // Background
     Surface(
@@ -166,47 +323,90 @@ fun GradePrefab(onClose: () -> Unit, color: Color){
         color = color,
         modifier = Modifier
             .fillMaxWidth()
-            .height(128.dp)
+            .height(120.dp)
             .padding(start = 16.dp, end = 16.dp, top = 16.dp)
     ) {
         // Content
         Column(modifier = Modifier.padding(16.dp)) {
+            // Top Row
             Row {
                 // Type
                 Surface(
                     shape = RoundedCornerShape(10),
                     color = color,
-                    border = BorderStroke(2.dp, TextOnColouredButton),
+                    border = if(editing) BorderStroke(2.dp, TextOnColouredButton) else null,
                     modifier = Modifier
-                        .size(width = 128.dp, height = 32.dp)
-                        .clickable { typeExpanded = !typeExpanded }
+                        .size(width = 170.dp, height = 32.dp)
+                        .let { if (editing) it.clickable { typeExpanded = !typeExpanded } else it }
                 ) {
                     Row(verticalAlignment = CenterVertically,
                         modifier = Modifier.padding(4.dp)) {
-                        Text(text = "Typ", color = TextOnColouredButton, style = MaterialTheme.typography.labelMedium)
-                        DropdownMenu(expanded = typeExpanded, onDismissRequest = { typeExpanded = false }) {
-                            DropdownMenuItem(text = { Text(text = "Test") }, onClick = { /*TODO*/ })
+                        Text(text = selectedType, color = TextOnColouredButton, style = MaterialTheme.typography.labelMedium)
+
+                        if(editing) {
+                            DropdownMenu(
+                                expanded = typeExpanded,
+                                onDismissRequest = { typeExpanded = false }
+                            ){
+                                typesSelection.forEach { type ->
+                                    Item(
+                                        name = type,
+                                        onItemClick = {
+                                            selectedType = type
+                                            typeExpanded = !typeExpanded
+                                            onTypeChange(selectedType)
                                         }
-                        Spacer(modifier = Modifier.weight(1f))
-                        Icon(imageVector = if (typeExpanded) Icons.Filled.KeyboardArrowUp else Icons.Filled.KeyboardArrowDown,
-                            contentDescription = null,
-                            tint = TextOnColouredButton)
+                                    )
                                 }
                             }
-                // Delete
                             Spacer(modifier = Modifier.weight(1f))
                             Icon(
-                    imageVector = Icons.Filled.Close,
+                                imageVector = if (typeExpanded) Icons.Filled.KeyboardArrowUp else Icons.Filled.KeyboardArrowDown,
+                                contentDescription = null,
+                                tint = TextOnColouredButton
+                            )
+                        }
+                    }
+                }
+
+                // Buttons
+                Spacer(modifier = Modifier.weight(1f))
+                if (editing) {
+                    // Delete
+                    Icon(
+                        imageVector = Icons.Outlined.Delete,
                         contentDescription = null,
                         tint = TextOnColouredButton,
                         modifier = Modifier
                             .size(28.dp)
                             .clickable { onClose() }
                     )
+                    Spacer(modifier = Modifier.width(4.dp))
+                    // Confirm
+                    Icon(
+                        imageVector = Icons.Filled.Check,
+                        contentDescription = null,
+                        tint = TextOnColouredButton,
+                        modifier = Modifier
+                            .size(28.dp)
+                            .clickable { editing = !editing }
+                    )
+                }
+                else{
+                    // Edit
+                    Icon(
+                        imageVector = Icons.Outlined.Edit,
+                        contentDescription = null,
+                        tint = TextOnColouredButton,
+                        modifier = Modifier
+                            .size(28.dp)
+                            .clickable { editing = !editing }
+                    )
+                }
             }
 
             Spacer(modifier = Modifier.weight(1f))
-
+            // Bottom Row
             Row (verticalAlignment = CenterVertically) {
                 // Grade
                 Text(text = "Note:", color = TextOnColouredButton, style = MaterialTheme.typography.labelMedium)
@@ -214,41 +414,94 @@ fun GradePrefab(onClose: () -> Unit, color: Color){
                 Surface(
                     shape = RoundedCornerShape(10),
                     color = color,
-                    border = BorderStroke(2.dp, TextOnColouredButton),
+                    border = if(editing) BorderStroke(2.dp, TextOnColouredButton) else null,
                     modifier = Modifier
                         .size(width = 48.dp, height = 32.dp)
-                        .clickable { gradeExpanded = !gradeExpanded }
+                        .let { if (editing) it.clickable { gradeExpanded = !gradeExpanded } else it }
                 ) {
                     Row(verticalAlignment = CenterVertically,
                         modifier = Modifier.padding(4.dp)) {
-                        Text(text = "1", color = TextOnColouredButton, style = MaterialTheme.typography.labelMedium)
-                        DropdownMenu(expanded = gradeExpanded, onDismissRequest = { gradeExpanded = false }) {
-                            DropdownMenuItem(text = { Text(text = "Test") }, onClick = { /*TODO*/ })
+                        Text(text = selectedGrade.toString(), color = TextOnColouredButton, style = MaterialTheme.typography.labelMedium)
+
+                        if(editing) {
+                            DropdownMenu(
+                                expanded = gradeExpanded,
+                                onDismissRequest = { gradeExpanded = false }) {
+                                gradesSelection.forEach { grade ->
+                                    Item(
+                                        name = grade.toString(),
+                                        onItemClick = {
+                                            selectedGrade = grade
+                                            gradeExpanded = !gradeExpanded
+                                            onGradeChange(selectedGrade)
+                                        }
+                                    )
+                                }
                             }
                             Spacer(modifier = Modifier.weight(1f))
-                        Icon(imageVector = if (gradeExpanded) Icons.Filled.KeyboardArrowUp else Icons.Filled.KeyboardArrowDown, contentDescription = null, tint = TextOnColouredButton)
+                            Icon(
+                                imageVector = if (gradeExpanded) Icons.Filled.KeyboardArrowUp else Icons.Filled.KeyboardArrowDown,
+                                contentDescription = null,
+                                tint = TextOnColouredButton
+                            )
                         }
                     }
+                }
+
                 // Weight
-                Spacer(modifier = Modifier.width(16.dp))
-                Text(text = "Gewichtung:", color = TextOnColouredButton, style = MaterialTheme.typography.labelMedium)
+                if (selectedType != "Schulaufgabe") {
+                    Spacer(modifier = Modifier.width(8.dp))
+                    Text(
+                        text = "Gewichtung:",
+                        color = TextOnColouredButton,
+                        style = MaterialTheme.typography.labelMedium
+                    )
                     Spacer(modifier = Modifier.width(8.dp))
                     Surface(
                         shape = RoundedCornerShape(10),
                         color = color,
-                    border = BorderStroke(2.dp, TextOnColouredButton),
+                        border = if (editing) BorderStroke(2.dp, TextOnColouredButton) else null,
                         modifier = Modifier
-                        .size(width = 64.dp, height = 32.dp)
-                        .clickable { weightExpanded = !weightExpanded }
+                            .size(width = 80.dp, height = 32.dp)
+                            .let {
+                                if (editing) it.clickable {
+                                    weightExpanded = !weightExpanded
+                                } else it
+                            }
                     ) {
-                    Row(verticalAlignment = CenterVertically,
-                        modifier = Modifier.padding(4.dp)) {
-                        Text(text = "1x", color = TextOnColouredButton, style = MaterialTheme.typography.labelMedium)
-                        DropdownMenu(expanded = weightExpanded, onDismissRequest = { weightExpanded = false }) {
-                            DropdownMenuItem(text = { Text(text = "Test") }, onClick = { /*TODO*/ })
+                        Row(
+                            verticalAlignment = CenterVertically,
+                            modifier = Modifier.padding(4.dp)
+                        ) {
+                            Text(
+                                text = "$selectedWeight" + "x",
+                                color = TextOnColouredButton,
+                                style = MaterialTheme.typography.labelMedium
+                            )
+
+                            if (editing) {
+                                DropdownMenu(
+                                    expanded = weightExpanded,
+                                    onDismissRequest = { weightExpanded = false }) {
+                                    weightsSelection.forEach { weight ->
+                                        Item(
+                                            name = weight.toString(),
+                                            onItemClick = {
+                                                selectedWeight = weight
+                                                weightExpanded = !weightExpanded
+                                                onWeightChange(selectedWeight)
+                                            }
+                                        )
+                                    }
                                 }
                                 Spacer(modifier = Modifier.weight(1f))
-                        Icon(imageVector = if (weightExpanded) Icons.Filled.KeyboardArrowUp else Icons.Filled.KeyboardArrowDown, contentDescription = null, tint = TextOnColouredButton)
+                                Icon(
+                                    imageVector = if (weightExpanded) Icons.Filled.KeyboardArrowUp else Icons.Filled.KeyboardArrowDown,
+                                    contentDescription = null,
+                                    tint = TextOnColouredButton
+                                )
+                            }
+                        }
                     }
                 }
             }
@@ -256,5 +509,57 @@ fun GradePrefab(onClose: () -> Unit, color: Color){
     }
 }
 
+@Composable
+fun Item(name : String, onItemClick: (String) -> Unit){
+    DropdownMenuItem(
+        text = { Text(text = name, style = MaterialTheme.typography.labelMedium) },
+        onClick = { onItemClick(name) }
+    )
+}
 
-data class GradeData(val id: Int, val color: Color)
+data class GradeData(
+    val id: Int,
+    val color: Color,
+    var grade: Int,
+    var weight: Float,
+    var type: String
+)
+
+fun calculateAverage(grades: List<GradeData>, editor: Editor): Float {
+    if (grades.isEmpty()) return 0.0f
+
+    var totalGrade = 0.0f
+    var totalWeights = 0.0f
+
+    var saTotalGrade = 0.0f
+    var saTotalWeights = 0.0f
+
+    grades.forEach { gradeData ->
+        if (gradeData.type != "Typ")
+            if (gradeData.type == "Schulaufgabe" && SAWeight != 0) {
+                saTotalGrade += gradeData.grade
+                saTotalWeights += 1
+            } else {
+                totalGrade += gradeData.grade * gradeData.weight
+                totalWeights += gradeData.weight
+            }
+    }
+
+    val smallAverage = totalGrade / totalWeights
+    val saAverage = saTotalGrade / saTotalWeights
+
+
+    val finalGrade = if (smallAverage.isNaN()) saAverage
+    else if (saAverage.isNaN()) smallAverage
+    else (smallAverage + saAverage * SAWeight) / (1 + SAWeight)
+
+    editor.putFloat(name, finalGrade).apply()
+
+    return finalGrade
+}
+
+fun saveGradesStart(context: Context, grades: List<GradeData>){
+    CoroutineScope(Dispatchers.IO).launch {
+        saveGrades(context, grades, name)
+    }
+}

app/src/main/java/com/schoolapp/cleverclass/GradeStoreManager.kt

@@ -0,0 +1,31 @@
+package com.schoolapp.cleverclass
+
+import android.content.Context
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.stringPreferencesKey
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.preferencesDataStore
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+
+object GradeStoreManager {
+    private val Context.dataStore: DataStore<Preferences> by preferencesDataStore(name = "grades_preferences")
+
+    suspend fun saveGrades(context: Context, grades: List<GradeData>, subject: String) {
+        context.dataStore.edit { preferences ->
+            val json = Gson().toJson(grades)
+            preferences[stringPreferencesKey(subject)] = json
+        }
+    }
+
+    fun getGrades(context: Context, subject: String): Flow<List<GradeData>> {
+        return context.dataStore.data.map { preferences ->
+            val json = preferences[stringPreferencesKey(subject)] ?: return@map emptyList()
+            val type = object : TypeToken<List<GradeData>>() {}.type
+            Gson().fromJson(json, type)
+        }
+    }
+}

app/src/main/java/com/schoolapp/cleverclass/LessonStoreManager.kt

@@ -0,0 +1,31 @@
+package com.schoolapp.cleverclass
+
+import android.content.Context
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.stringPreferencesKey
+import androidx.datastore.preferences.preferencesDataStore
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+
+object LessonStoreManager {
+    private val Context.dataStore: DataStore<Preferences> by preferencesDataStore(name = "lesson_preferences")
+
+    suspend fun saveLessons(context: Context, lessons: List<LessonData>, day: String) {
+        context.dataStore.edit { preferences ->
+            val json = Gson().toJson(lessons)
+            preferences[stringPreferencesKey(day)] = json
+        }
+    }
+
+    fun getLessons(context: Context, day: String): Flow<List<LessonData>> {
+        return context.dataStore.data.map { preferences ->
+            val json = preferences[stringPreferencesKey(day)] ?: return@map emptyList()
+            val type = object : TypeToken<List<LessonData>>() {}.type
+            Gson().fromJson(json, type)
+        }
+    }
+}

app/src/main/java/com/schoolapp/cleverclass/MainActivity.kt

@@ -3,6 +3,7 @@ package com.schoolapp.cleverclass
 import android.content.Context
 import android.content.Intent
 import android.content.SharedPreferences
+import android.net.Uri
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
@@ -42,7 +43,6 @@ import com.schoolapp.cleverclass.ui.theme.TextOnColouredButton
 class MainActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        readData(applicationContext)
         setContent {
             CleverClassTheme {
                 Surface(modifier = Modifier.fillMaxSize(),
@@ -67,7 +67,7 @@ fun MainContent(activity: ComponentActivity){
             title = {
                 Text(text = "CleverClass",
                     style = MaterialTheme.typography.headlineMedium,
-                    color = MaterialTheme.colorScheme.onPrimary)
+                    color = MaterialTheme.colorScheme.onPrimaryContainer)
             },
             actions = {
                 IconButton(
@@ -75,7 +75,8 @@ fun MainContent(activity: ComponentActivity){
                     Icon(
                         imageVector = Icons.Filled.Settings,
                         contentDescription = null,
-                        modifier = Modifier.size(28.dp))
+                        modifier = Modifier.size(28.dp),
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer)
                 }
             },
             modifier = Modifier.fillMaxWidth()
@@ -85,8 +86,15 @@ fun MainContent(activity: ComponentActivity){
             MainButton(onClick = { switchToActivity(activity, StundenplanActivity::class.java) }, color = Color(0xFFFF4081), text = "Stundenplan", sharedPreferences)
             MainButton(onClick = { switchToActivity(activity, NotenActivity::class.java) }, color = Color(0xFFE040FB), text = "Noten", sharedPreferences)
             MainButton(onClick = { switchToActivity(activity, PSEActivity::class.java) }, color = Color(0xFF536DFE), text = "Periodensystem", sharedPreferences)
-            MainButton(onClick = { /*TODO: Mebis activity*/ }, color = Color(0xFF7C4DFF), text = "Mebis", sharedPreferences)
-            MainButton(onClick = { /*TODO: DSBmobile activity*/ }, color = Color(0xFFFF6E40), text = "DSBmobile", sharedPreferences)
+            MainButton(onClick = { switchToActivity(activity, DSBActivity::class.java) }, color = Color(0xFFFF6E40), text = "DSBmobile", sharedPreferences)
+            MainButton(
+                onClick = {
+                    val intent = Intent(Intent.ACTION_VIEW, Uri.parse("https://mebis.bycs.de/"))
+                    activity.startActivity(intent)
+                          },
+                color = Color(0xFF7C4DFF),
+                text = "Mebis", sharedPreferences
+            )
         }
     }
 }

app/src/main/java/com/schoolapp/cleverclass/NotenActivity.kt

@@ -1,9 +1,13 @@
 package com.schoolapp.cleverclass
 
+import android.content.Context
 import android.content.Intent
+import android.content.SharedPreferences
+import android.content.SharedPreferences.Editor
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
@@ -12,27 +16,79 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material.icons.outlined.Delete
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.BottomAppBar
 import androidx.compose.material3.Button
 import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.Divider
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.dp
 import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
 import com.schoolapp.cleverclass.ui.theme.TextOnColouredButton
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+
+private val subjects = listOf(
+    "Mathe", "Deutsch", "Englisch", "Französisch", "Latein",
+    "Physik", "Chemie", "Biologie", "Informatik",
+    "Geographie", "Wirtschaft", "Geschichte", "Politik und Gesellschaft",
+    "Ethik", "Evangelisch", "Katholisch",
+    "Kunst", "Musik", "Sport"
+)
+
+private val saWeights = listOf(
+    2, 2, 2, 2, 2,
+    1, 1, 0, 0,
+    0, 0, 0, 0,
+    0, 0, 0,
+    0, 0, 0
+)
+
+private val colorsA = listOf(
+    Color(0xFF536DFE),
+    Color(0xFF18FFFF),
+    Color(0xFF448AFF),
+    Color(0xFF64FFDA),
+    Color(0xFF40C4FF)
+)
+private val colorsB = listOf(
+    Color(0xFFFFFF00),
+    Color(0xFFFFAB40),
+    Color(0xFFFFD740),
+    Color(0xFFEEFF41)
+)
+private val colorsC = listOf(
+    Color(0xFFFF5252),
+    Color(0xFFFF4081),
+    Color(0xFFFF6052),
+    Color(0xFFFF6E40)
+)
+
 
 class NotenActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -54,40 +110,193 @@ class NotenActivity : ComponentActivity() {
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun NotenContent(activity: ComponentActivity){
-    Column() {
+    val sharedPreferences = activity.getSharedPreferences("gradeAverages", Context.MODE_PRIVATE)
+    val editor = sharedPreferences.edit()
+
+    var allAverage by remember {
+        mutableStateOf(0f)
+    }
+
+    allAverage = calculateAllAverage(sharedPreferences)
+
+    var showDeleteConfirmation by remember {
+        mutableStateOf(false)
+    }
+
+    Scaffold(
+        topBar = {
             TopAppBar(
                 colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.primaryContainer),
                 title = {
                     Text(text = "Noten",
-                    style = MaterialTheme.typography.headlineSmall
+                        style = MaterialTheme.typography.headlineSmall,
+                        color = MaterialTheme.colorScheme.onPrimaryContainer
                     )},
                 navigationIcon = {
                     IconButton(onClick = { activity.finish() }) {
                         Icon(
                             imageVector = Icons.Filled.ArrowBack,
                             contentDescription = null,
-                        modifier = Modifier.size(28.dp)
+                            modifier = Modifier.size(28.dp),
+                            tint = MaterialTheme.colorScheme.onPrimaryContainer
+                        )
+                    }
+                },
+                actions = {
+                    IconButton(onClick = { showDeleteConfirmation = true }) {
+                        Icon(
+                            imageVector = Icons.Outlined.Delete,
+                            contentDescription = null,
+                            modifier = Modifier.size(28.dp),
+                            tint = MaterialTheme.colorScheme.onPrimaryContainer
                         )
                     }
                 },
                 modifier = Modifier.fillMaxWidth()
             )
-
-        Column(modifier = Modifier.verticalScroll(rememberScrollState())) {
-            FachButton(color = Color(0xFF69F0AE), text = "Deutsch", 3.66f, activity)
-            FachButton(color = Color(0xFFEEFF41), text = "Mathe", 1.56f, activity)
-            FachButton(color = Color(0xFFFFAB40), text = "Englisch", 2.27f, activity)
-            FachButton(color = Color(0xFF18FFFF), text = "Latein", 4.75f, activity)
-            FachButton(color = Color(0xFFB2FF59), text = "Französisch", 2.33f, activity)
+        },
+        bottomBar = {
+            BottomAppBar(
+                containerColor = MaterialTheme.colorScheme.primaryContainer,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .height(64.dp)
+            ) {
+                Row (modifier = Modifier
+                    .fillMaxWidth()
+                    .align(Alignment.CenterVertically)){
+                    Spacer(modifier = Modifier.width(16.dp))
+                    Text(text = "Gesamtschnitt:",
+                        style = MaterialTheme.typography.headlineSmall)
+                    Spacer(modifier = Modifier.weight(1f))
+                    Text(
+                        text = "Ø" + formatFloat(allAverage),
+                        style = MaterialTheme.typography.headlineSmall)
+                    Spacer(modifier = Modifier.width(16.dp))
                 }
             }
         }
+    ) {innerPadding ->
+        Column(
+            horizontalAlignment = Alignment.CenterHorizontally,
+            modifier = Modifier
+                .verticalScroll(rememberScrollState())
+                .padding(innerPadding)
+        )
+        {
+            GroopTitle("Hauptfächer", true)
+            for (i in 0..4){
+                FachButton(
+                    color = colorsA[i],
+                    subject = subjects[i],
+                    saWeight = saWeights[i],
+                    activity = activity,
+                    sharedPreferences = sharedPreferences,
+                    onAvgChange = { allAverage = calculateAllAverage(sharedPreferences) }
+                )
+            }
+
+            GroopTitle("Naturwissenschaften", false)
+            for (i in 5..8){
+                FachButton(
+                    color = colorsB[i - 5],
+                    subject = subjects[i],
+                    saWeight = saWeights[i],
+                    activity = activity,
+                    sharedPreferences = sharedPreferences,
+                    onAvgChange = { allAverage = calculateAllAverage(sharedPreferences) }
+                )
+            }
+
+            GroopTitle("Gesellschaftswissenschaften", false)
+            for (i in 9..12){
+                FachButton(
+                    color = colorsC[i - 9],
+                    subject = subjects[i],
+                    saWeight = saWeights[i],
+                    activity = activity,
+                    sharedPreferences = sharedPreferences,
+                    onAvgChange = { allAverage = calculateAllAverage(sharedPreferences) }
+                )
+            }
+
+            GroopTitle("Religionen", false)
+            for (i in 13..15){
+                FachButton(
+                    color = colorsA[i - 13],
+                    subject = subjects[i],
+                    saWeight = saWeights[i],
+                    activity = activity,
+                    sharedPreferences = sharedPreferences,
+                    onAvgChange = { allAverage = calculateAllAverage(sharedPreferences) }
+                )
+            }
+
+            GroopTitle("Sonstiges", false)
+            for (i in 16..18){
+                FachButton(
+                    color = colorsB[i - 16],
+                    subject = subjects[i],
+                    saWeight = saWeights[i],
+                    activity = activity,
+                    sharedPreferences = sharedPreferences,
+                    onAvgChange = { allAverage = calculateAllAverage(sharedPreferences) }
+                )
+            }
+
+            Spacer(modifier = Modifier.height(16.dp))
+        }
+    }
+
+    if (showDeleteConfirmation){
+        AlertDialog(
+            onDismissRequest = { showDeleteConfirmation = false },
+            text = { Text(text = "Möchten Sie wirklich alle Noten aus Allen Fächern löschen?", color = MaterialTheme.colorScheme.onPrimaryContainer, style = MaterialTheme.typography.labelMedium) },
+            confirmButton = {
+                Row(modifier = Modifier.fillMaxWidth()){
+                    Text(
+                        text = "Bestätigen",
+                        color = MaterialTheme.colorScheme.secondary,
+                        style = MaterialTheme.typography.labelMedium,
+                        modifier = Modifier.clickable {
+                            deleteAll(editor, activity)
+                            showDeleteConfirmation = false
+                        }
+                    )
+
+                    Spacer(modifier = Modifier.weight(1f))
+
+                    Text(
+                        text = "Abbrechen",
+                        color = MaterialTheme.colorScheme.secondary,
+                        style = MaterialTheme.typography.labelMedium,
+                        modifier = Modifier.clickable { showDeleteConfirmation = false }
+                    )
+                }
+            },
+            containerColor = MaterialTheme.colorScheme.primaryContainer
+        )
+    }
+}
 
 @Composable
-fun FachButton(color : Color, text : String, average : Float, activity : ComponentActivity){
+fun FachButton(
+    color : Color,
+    subject : String,
+    saWeight: Int,
+    activity: ComponentActivity,
+    sharedPreferences: SharedPreferences,
+    onAvgChange: () -> Unit){
+    var avg by remember {
+        mutableStateOf(sharedPreferences.getFloat(subject, 0.0f))
+    }
+
     Button(
         onClick = {
-            val intent = Intent(activity, FachActivity::class.java).apply { putExtra(FachActivity.ARGUMENT_KEY, text) }
+            val intent = Intent(activity, FachActivity::class.java).apply {
+                putExtra(FachActivity.NAME_KEY, subject)
+                putExtra(FachActivity.WEIGHT_KEY, saWeight)
+            }
             activity.startActivity(intent) },
         shape = RoundedCornerShape(40),
         colors = ButtonDefaults.outlinedButtonColors(containerColor = color),
@@ -97,13 +306,76 @@ fun FachButton(color : Color, text : String, average : Float, activity : Compone
             .padding(start = 16.dp, end = 16.dp, top = 16.dp)
     ) {
         Row(modifier = Modifier.fillMaxWidth()) {
-            Text(text = text,
+            Text(text = subject,
                 color = TextOnColouredButton,
                 style = MaterialTheme.typography.labelMedium)
             Spacer(modifier = Modifier.weight(1f))
-            Text(text = "Ø$average",
+            Text(text = if (avg != 0.0f) "Ø${formatFloat(avg)}" else "---",
                 color = TextOnColouredButton,
                 style = MaterialTheme.typography.labelMedium)
         }
     }
+
+    // changes state when Shared Preference is updated
+    val observer = remember {
+        SharedPreferences.OnSharedPreferenceChangeListener { _, key ->
+            if (key == subject) {
+                avg = sharedPreferences.getFloat(subject, 0.0f)
+                onAvgChange()
+            }
+        }
+    }
+
+    // handles observer disposal
+    DisposableEffect(Unit) {
+        sharedPreferences.registerOnSharedPreferenceChangeListener(observer)
+        onDispose {
+            sharedPreferences.unregisterOnSharedPreferenceChangeListener(observer)
+        }
+    }
+}
+
+@Composable
+fun GroopTitle(name: String, top: Boolean){
+    if(!top) {
+        Spacer(modifier = Modifier.height(32.dp))
+        Divider()
+    }
+    Spacer(modifier = Modifier.height(32.dp))
+    Text(text = name, style = MaterialTheme.typography.headlineSmall, color = MaterialTheme.colorScheme.onBackground)
+    Spacer(modifier = Modifier.height(12.dp))
+}
+
+fun calculateAllAverage(sharedPreferences: SharedPreferences): Float{
+    var total = 0.0f
+    var number = 0
+    val avgs = loadAllAverages(sharedPreferences)
+
+    avgs.forEach{ avg ->
+        if (avg != 0.0f && !avg.isNaN()){
+            total += avg
+            number += 1
+        }
+    }
+
+    return (total / number)
+}
+
+fun loadAllAverages(sharedPreferences: SharedPreferences): List<Float>{
+    val avgs = emptyList<Float>().toMutableList()
+
+    subjects.forEach { name ->
+        avgs += sharedPreferences.getFloat(name, 0.0f)
+    }
+
+    return avgs
+}
+
+fun deleteAll(editor: Editor, context: Context){
+    subjects.forEach{name ->
+        editor.putFloat(name, 0.0f).apply()
+        CoroutineScope(Dispatchers.IO).launch {
+            GradeStoreManager.saveGrades(context, emptyList(), name)
+        }
+    }
 }

app/src/main/java/com/schoolapp/cleverclass/PSEActivity.kt

@@ -1,36 +1,60 @@
 package com.schoolapp.cleverclass
 
-import android.app.AlertDialog
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.compose.foundation.background
+import androidx.compose.foundation.border
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.horizontalScroll
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.wrapContentWidth
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material.icons.outlined.Info
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
-import androidx.compose.material3.TextButton
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.dp
 import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
+import org.json.JSONObject
+import java.io.InputStreamReader
 
 class PSEActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContent {
             CleverClassTheme {
-                Surface(modifier = Modifier.fillMaxSize(),
-                    color = MaterialTheme.colorScheme.background) {
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background)
+                {
                     PSEContent(activity = this)
                 }
             }
@@ -38,17 +62,78 @@ class PSEActivity : ComponentActivity() {
     }
 }
 
+@Composable
+fun PSEContent(activity: ComponentActivity){
+    var loading by remember {
+        mutableStateOf(true)
+    }
+
+    LaunchedEffect(key1 = true) {
+        loading = false
+    }
+
+    if (loading) {
+        StaticLoadingScreen()
+    } else {
+        PSEMainContent(activity)
+    }
+}
+
+private lateinit var rootObj : JSONObject
+
+private val colors = listOf(
+    Color(0xFFBCA76D),
+    Color(0xFFC65253),
+    Color(0xFF337733),
+    Color(0xFFDC2222),
+    Color(0xFF129DC3),
+    Color(0xFFDDCC69),
+    Color(0xFF7044DD)
+)
+private val shells = listOf(
+    "K", "L", "M", "N", "O", "P", "Q"
+)
+
+private val elementNameList = listOf(
+    "H", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "He",
+    "Li", "Be", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "B", "C", "N", "O", "F", "Ne",
+    "Na", "Mg", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "Al", "Si", "P", "S", "Cl", "Ar",
+    "K", "Ca", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "Sc", "Ti", "V", "Cr", "Mn", "Fe", "Co", "Ni", "Cu", "Zn", "Ga", "Ge", "As", "Se", "Br", "Kr",
+    "Rb", "Sr", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "Y", "Zr", "Nb", "Mo", "Tc", "Ru", "Rh", "Pd", "Ag", "Cd", "In", "Sn", "Sb", "Te", "I", "Xe",
+    "Cs", "Ba", "La", "Ce", "Pr", "Nd", "Pm", "Sm", "Eu", "Gd", "Tb", "Dy", "Ho", "Er", "Tm", "Yb", "Lu", "Hf", "Ta", "W", "Re", "Os", "Ir", "Pt", "Au", "Hg", "Tl", "Pb", "Bi", "Po", "At", "Rn",
+    "Fr", "Ra", "Ac", "Th", "Pa", "U", "Np", "Pu", "Am", "Cm", "Bk", "Cf", "Es", "Fm", "Md", "No", "Lr", "Rf", "Db", "Sg", "Bh", "Hs", "Mt", "Ds", "Rg", "Cn", "Nh", "Fl", "Mc", "Lv", "Ts", "Og"
+)
+private val elementButtonColors = listOf(
+    0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0,
+    1, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 1, 1, 1, 1, 1,
+    2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2, 2, 2, 2, 2, 2,
+    3, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3,
+    4, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4,
+    5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5,
+    6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6
+)
+
 // Content of PSE
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
-fun PSEContent(activity: ComponentActivity){
-    Column() {
+fun PSEMainContent(activity: ComponentActivity) {
+    val inputStream = activity.assets.open("elements_data.json")
+    rootObj = JSONObject(InputStreamReader(inputStream).readText())
+
+    var showInfo by remember {
+        mutableStateOf(false)
+    }
+    var dialogChooser by remember {
+        mutableStateOf(-1)
+    }
+    Column {
         TopAppBar(
             colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.primaryContainer),
             title = {
                 Text(
-                    text = "Periodensystem",
-                    style = MaterialTheme.typography.headlineSmall
+                    text = "Periodensystem der Elemente",
+                    style = MaterialTheme.typography.headlineSmall,
+                    color = MaterialTheme.colorScheme.onPrimaryContainer
                 )
             },
             navigationIcon = {
@@ -56,26 +141,173 @@ fun PSEContent(activity: ComponentActivity){
                     Icon(
                         imageVector = Icons.Filled.ArrowBack,
                         contentDescription = null,
-                        modifier = Modifier.size(28.dp)
+                        modifier = Modifier.size(28.dp),
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer
+                    )
+                }
+            },
+            actions = {
+                IconButton(onClick = {
+                    showInfo = true
+                }) {
+                    Icon(
+                        imageVector = Icons.Outlined.Info,
+                        contentDescription = null,
+                        modifier = Modifier.size(28.dp),
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer
                     )
                 }
             },
             modifier = Modifier.fillMaxWidth()
         )
 
-        Column() {
-            //region //Element dialog definitions
-            val HBuilder = AlertDialog.Builder(activity)
-            HBuilder.setIcon(null)
-            HBuilder.setTitle(elements[0].data0)
-            HBuilder.setMessage(elements[0].data0)
-            HBuilder.setPositiveButton(R.string.dialog_schließen, null)
-            //endregion
+        Column(
+            verticalArrangement = Arrangement.Center,
+            modifier = Modifier
+                .fillMaxHeight()
+                .padding(3.dp)
+                .verticalScroll(rememberScrollState())
+                .horizontalScroll(rememberScrollState())
+        ) {
+            var dialogCounter = 0
 
-            TextButton(
-                onClick = { HBuilder.show() }) {
-                Text(text = "H")
+            for (row in 0..6) {
+                Row {
+                    InformationBox(text = (row + 1).toString(), color = MaterialTheme.colorScheme.onBackground)
+
+                    for (element in 0..31) {
+                        val index = row * 32 + element
+                        if (elementNameList[index] != "") {
+                            val elementJsonIndex = dialogCounter
+                            ++dialogCounter
+                            ElementBox(arrayIndex = index, onClick = { dialogChooser = elementJsonIndex })
+                        } else {
+                            Box(
+                                modifier = Modifier
+                                    .padding(3.dp)
+                                    .size(60.dp)
+                            )
+                        }
+                    }
+
+                    InformationBox(text = shells[row], color = colors[row])
                 }
             }
         }
     }
+
+    if (dialogChooser != -1) {
+        val dcValue = dialogChooser
+        AlertDialog(
+            onDismissRequest = { dialogChooser = -1 },
+            text = {
+                Text(
+                    modifier = Modifier
+                        .verticalScroll(rememberScrollState())
+                        .horizontalScroll(rememberScrollState()),
+                    text = readElementData(dcValue),
+                    color = MaterialTheme.colorScheme.onPrimaryContainer,
+                    style = MaterialTheme.typography.labelMedium
+                )
+            },
+            confirmButton = {
+                Text(
+                    text = "Schließen",
+                    color = MaterialTheme.colorScheme.secondary,
+                    style = MaterialTheme.typography.labelMedium,
+                    modifier = Modifier.clickable {
+                        dialogChooser = -1
+                    }
+                )
+            },
+            containerColor = MaterialTheme.colorScheme.primaryContainer,
+            modifier = Modifier
+                .padding(5.dp)
+                .wrapContentWidth(unbounded = true)
+        )
+    }
+    if (showInfo) {
+        AlertDialog(
+            onDismissRequest = { showInfo = false },
+            text = {
+                Text(
+                    text = "Auf ein Element tippen, um genauere Informationen zu erhalten.\n\n" +
+                            "Verwendung im Querformat empfohlen",
+                    color = MaterialTheme.colorScheme.onPrimaryContainer,
+                    style = MaterialTheme.typography.labelMedium
+                )
+            },
+            confirmButton = {
+                Text(
+                    text = "Schließen",
+                    color = MaterialTheme.colorScheme.secondary,
+                    style = MaterialTheme.typography.labelMedium,
+                    modifier = Modifier.clickable {
+                        showInfo = false
+                    }
+                )
+            },
+            containerColor = MaterialTheme.colorScheme.primaryContainer,
+            modifier = Modifier
+                .padding(5.dp)
+        )
+    }
+
+}
+
+@Composable
+fun ElementBox(arrayIndex: Int, onClick: () -> Unit){
+    Box(modifier = Modifier
+        .padding(3.dp)
+        .size(60.dp)
+        .background(
+            color = colors[elementButtonColors[arrayIndex]],
+            shape = RoundedCornerShape(5)
+        )
+        .clickable { onClick() }
+    ) {
+        Text(
+            modifier = Modifier.align(Alignment.Center),
+            text = elementNameList[arrayIndex],
+            color = com.schoolapp.cleverclass.ui.theme.TextOnColouredButton,
+            style = MaterialTheme.typography.labelLarge
+        )
+    }
+}
+
+@Composable
+fun InformationBox(text: String, color: Color){
+    Box(modifier = Modifier
+        .padding(3.dp)
+        .size(60.dp)
+        .border(
+            width = 1.dp,
+            color = MaterialTheme.colorScheme.primaryContainer
+        )
+    ) {
+        Text(
+            modifier = Modifier.align(Alignment.Center),
+            text = text,
+            color = color,
+            style = MaterialTheme.typography.labelLarge
+        )
+    }
+}
+
+private fun readElementData(int: Int): String {
+    val elementData = rootObj.getJSONArray("elements").getJSONObject(int)
+    return "Name:\n${elementData.get("Name")}\n\n" +
+            "Ordnungszahl:\n${elementData.get("Ordnungszahl")}\n\n" +
+            "Gruppe:\n${elementData.get("Gruppe")}\n\n" +
+            "Periode/Hauptquantenzahl:\n${elementData.get("Periode/Hauptquantenzahl")}\n\n" +
+            "Schale:\n${elementData.get("Schale")}\n\n" +
+            "Molare Masse:\n${elementData.get("Molare Masse")}\n\n" +
+            "Dichte:\n${elementData.get("Dichte")}\n\n" +
+            "Elektronegativität:\n${elementData.get("Elektronegativität")}\n\n" +
+            "Schmelztemperatur:\n${elementData.get("Schmelztemperatur")}\n\n" +
+            "Siedetemperatur:\n${elementData.get("Siedetemperatur")}\n\n" +
+            "künstlich:\n${elementData.get("künstlich")}\n\n" +
+            "radioaktiv:\n${elementData.get("radioaktiv")}\n\n" +
+            "Halbwertszeit:\n${elementData.get("Halbwertszeit")}\n\n" +
+            "Strahlungsart:\n${elementData.get("Strahlungsart")}"
+}

app/src/main/java/com/schoolapp/cleverclass/PSEData.kt

@@ -1,104 +0,0 @@
-package com.schoolapp.cleverclass
-
-import android.content.Context
-import java.io.BufferedReader
-import java.io.IOException
-import java.io.InputStreamReader
-
-val elements = mutableListOf<PSEData>()
-var i = 0
-
-class PSEData() {
-    var data0: String = ""
-    var data1: String = ""
-    var data2: String = ""
-    var data3: String = ""
-    var data4: String = ""
-    var data5: String = ""
-    var data6: String = ""
-    var data7: String = ""
-    var data8: String = ""
-    var data9: String = ""
-    var data10: String = ""
-    var data11: String = ""
-    var data12: String = ""
-    var data13: String = ""
-    var data14: String = ""
-    var data15: String = ""
-    constructor(
-        string0: String,
-        string1: String,
-        string2: String,
-        string3: String,
-        string4: String,
-        string5: String,
-        string6: String,
-        string7: String,
-        string8: String,
-        string9: String,
-        string10: String,
-        string11: String,
-        string12: String,
-        string13: String,
-        string14: String,
-        string15: String
-    ) : this() {
-        data0 = string0
-        data1 = string1
-        data2 = string2
-        data3 = string3
-        data4 = string4
-        data5 = string5
-        data6 = string6
-        data7 = string7
-        data8 = string8
-        data9 = string9
-        data10 = string10
-        data11 = string11
-        data12 = string12
-        data13 = string13
-        data14 = string14
-        data15 = string15
-    }
-}
-
-fun readData(context: Context) {
-    val elementInput = mutableListOf<String>()
-    val file = "elements_data.txt"
-    val assetManager = context.assets
-    val inputStream = assetManager.open(file)
-    try {
-        BufferedReader(InputStreamReader(inputStream)).use { br ->
-            br.lines().forEach {
-                elementInput.add(it)
-            }
-        }
-    }
-    catch (e: IOException) {
-        e.printStackTrace()
-    }
-    if (i < 118) {
-        while (i < 118) {
-            val pseobject = PSEData(
-                string0 = elementInput[(i * 16)],
-                string1 = elementInput[(i * 16) + 1],
-                string2 = elementInput[(i * 16) + 2],
-                string3 = elementInput[(i * 16) + 3],
-                string4 = elementInput[(i * 16) + 4],
-                string5 = elementInput[(i * 16) + 5],
-                string6 = elementInput[(i * 16) + 6],
-                string7 = elementInput[(i * 16) + 7],
-                string8 = elementInput[(i * 16) + 8],
-                string9 = elementInput[(i * 16) + 9],
-                string10 = elementInput[(i * 16) + 10],
-                string11 = elementInput[(i * 16) + 11],
-                string12 = elementInput[(i * 16) + 12],
-                string13 = elementInput[(i * 16) + 13],
-                string14 = elementInput[(i * 16) + 14],
-                string15 = elementInput[(i * 16) + 15]
-            )
-            elements.add(pseobject)
-            i++
-        }
-    }
-}

app/src/main/java/com/schoolapp/cleverclass/SettingsActivity.kt

@@ -8,19 +8,23 @@ import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.layout.wrapContentHeight
+import androidx.compose.foundation.layout.wrapContentSize
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Divider
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
@@ -32,8 +36,10 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
@@ -61,6 +67,10 @@ fun SettingsContent(activity: ComponentActivity) {
     val sharedPreferences = activity.getSharedPreferences("Settings", Context.MODE_PRIVATE)
     val editor = sharedPreferences.edit()
 
+    var showDeleteConfirmation by remember {
+        mutableStateOf(false)
+    }
+
     Column(modifier = Modifier.fillMaxSize()) {
         // Top AppBar
         TopAppBar(
@@ -68,7 +78,8 @@ fun SettingsContent(activity: ComponentActivity) {
             title = {
                 Text(
                     text = "Einstellungen",
-                    style = MaterialTheme.typography.headlineSmall
+                    style = MaterialTheme.typography.headlineSmall,
+                    color = MaterialTheme.colorScheme.onPrimaryContainer
                 )
             },
             navigationIcon = {
@@ -76,7 +87,8 @@ fun SettingsContent(activity: ComponentActivity) {
                     Icon(
                         imageVector = Icons.Filled.ArrowBack,
                         contentDescription = null,
-                        modifier = Modifier.size(28.dp)
+                        modifier = Modifier.size(28.dp),
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer
                     )
                 }
             },
@@ -89,13 +101,45 @@ fun SettingsContent(activity: ComponentActivity) {
                 .weight(1f)
                 .verticalScroll(rememberScrollState())
                 .fillMaxWidth()
-
         ) {
             Setting(text = "Stundenplan", sharedPreferences, editor)
             Setting(text = "Noten", sharedPreferences, editor)
             Setting(text = "Periodensystem", sharedPreferences, editor)
-            Setting(text = "Mebis", sharedPreferences, editor)
             Setting(text = "DSBmobile", sharedPreferences, editor)
+            Setting(text = "Mebis", sharedPreferences, editor)
+            Spacer(modifier = Modifier.height(16.dp))
+
+            Divider()
+            Box(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .clickable {
+                        val intent = Intent(activity, DSBLoginActivity::class.java).apply {
+                            putExtra(DSBLoginActivity.TYPE_KEY, "Settings")
+                        }
+                        activity.startActivity(intent)
+                    }
+            ) {
+                Text(
+                    text = "DSBmobile Daten",
+                    color = MaterialTheme.colorScheme.onBackground,
+                    style = MaterialTheme.typography.labelMedium,
+                    modifier = Modifier.padding(16.dp)
+                )
+            }
+            Divider()
+            Box(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .clickable { showDeleteConfirmation = true }
+            ) {
+                Text(
+                    text = "Alle Daten löschen",
+                    color = MaterialTheme.colorScheme.onBackground,
+                    style = MaterialTheme.typography.labelMedium,
+                    modifier = Modifier.padding(16.dp)
+                )
+            }
         }
 
         // About Button
@@ -106,20 +150,64 @@ fun SettingsContent(activity: ComponentActivity) {
             horizontalAlignment = Alignment.CenterHorizontally
         ) {
             Divider()
-            Spacer(modifier = Modifier.height(16.dp))
-            Text(
-                text = "About",
-                style = MaterialTheme.typography.bodySmall,
-                modifier = Modifier.clickable {
+            Spacer(modifier = Modifier.height(8.dp))
+            Box(
+                contentAlignment = Alignment.Center,
+                modifier = Modifier
+                    .wrapContentSize()
+                    .clickable {
                         val intent = Intent(activity, AboutActivity::class.java)
                         activity.startActivity(intent)
                     }
+            ) {
+                Text(
+                    text = "About",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onBackground,
+                    modifier = Modifier.padding(horizontal = 32.dp, vertical = 8.dp)
                 )
-            Spacer(modifier = Modifier.height(16.dp))
             }
+            Spacer(modifier = Modifier.height(8.dp))
         }
     }
 
+    if(showDeleteConfirmation){
+        AlertDialog(
+            onDismissRequest = { showDeleteConfirmation = false },
+            text = {
+                Text(
+                    text = "Möchten Sie wirklich alle Daten aus dieser App löschen?\n" +
+                            "Dieser Vorgang kann nicht rückgängig gemacht werden.",
+                    color = MaterialTheme.colorScheme.onPrimaryContainer,
+                    style = MaterialTheme.typography.labelMedium
+                )
+            },
+            confirmButton = {
+                Row(modifier = Modifier.fillMaxWidth()){
+                    Text(
+                        text = "Löschen",
+                        color = MaterialTheme.colorScheme.secondary,
+                        style = MaterialTheme.typography.labelMedium,
+                        modifier = Modifier.clickable {
+                            deleteAllData(activity)
+                            showDeleteConfirmation = false
+                        }
+                    )
+
+                    Spacer(modifier = Modifier.weight(1f))
+
+                    Text(
+                        text = "Abbrechen",
+                        color = MaterialTheme.colorScheme.secondary,
+                        style = MaterialTheme.typography.labelMedium,
+                        modifier = Modifier.clickable { showDeleteConfirmation = false }
+                    )
+                }
+            },
+            containerColor = MaterialTheme.colorScheme.primaryContainer
+        )
+    }
+}
 
 @Composable
 fun Setting(text : String, sharedPreferences: SharedPreferences, editor: Editor){
@@ -136,8 +224,10 @@ fun Setting(text : String, sharedPreferences: SharedPreferences, editor: Editor)
             }
         )
         Spacer(modifier = Modifier.width(16.dp))
-        Text(text = text,
-            color = MaterialTheme.colorScheme.onPrimaryContainer,
-            style = MaterialTheme.typography.labelMedium)
+        Text(
+            text = text,
+            color = MaterialTheme.colorScheme.onBackground,
+            style = MaterialTheme.typography.labelMedium
+        )
     }
 }

app/src/main/java/com/schoolapp/cleverclass/StundenplanActivity.kt

@@ -1,14 +1,29 @@
 package com.schoolapp.cleverclass
 
+import android.content.Context
+import android.content.Intent
+import android.icu.text.DecimalFormat
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.compose.foundation.border
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.horizontalScroll
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material.icons.outlined.Edit
+import androidx.compose.material.icons.outlined.Info
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
@@ -18,20 +33,60 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.scale
+import androidx.compose.ui.text.style.TextDecoration
 import androidx.compose.ui.unit.dp
+import androidx.core.content.ContextCompat.startActivity
+import com.schoolapp.cleverclass.LessonStoreManager.getLessons
 import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+
+private val listOfDays = listOf("Mo", "Di", "Mi", "Do", "Fr")
+private val listOfBreakIndexes = mutableListOf<Int>()
 
 class StundenplanActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+
+        val sharedPreferences = this.getSharedPreferences("TimeTable", Context.MODE_PRIVATE)
+        val setupDone = sharedPreferences.getBoolean("setupDone", false)
+
+        val lessons = MutableList(5) { listOf<LessonData>() }
+
+        //Loading saved lessons when NOT auto-loading the setup
+        if (setupDone) {
+            listOfDays.forEachIndexed { index, dayLessons ->
+                CoroutineScope(Dispatchers.IO).launch {
+                    getLessons(this@StundenplanActivity, dayLessons).collect { savedLessons ->
+                        lessons[index] = savedLessons.toMutableList()
+                    }
+                }
+            }
+        }
+
         setContent {
             CleverClassTheme {
                 Surface(
                     modifier = Modifier.fillMaxSize(),
                     color = MaterialTheme.colorScheme.background
                 ) {
-                    StundenplanContent(activity = this)
+                    //Auto-load setup, if incomplete
+                    if (!setupDone) {
+                        val intent = Intent(this@StundenplanActivity, TimeTableSetupActivity::class.java).apply {
+                            putExtra(TimeTableSetupActivity.TYPE_KEY, "TimeSetup")
+                        }
+                        startActivity(intent)
+                    }
+
+                    StundenplanContent(activity = this, lessons)
                 }
             }
         }
@@ -41,28 +96,360 @@ class StundenplanActivity : ComponentActivity() {
 // Content of Stundenplan
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
-fun StundenplanContent(activity: ComponentActivity){
-    Column() {
+fun StundenplanContent(activity: ComponentActivity, loadedLessons: List<List<LessonData>>){
+    //Declaration of most sharedPreferences-stored data (same SharedPreferences as in TimeTableSetupActivity.kt)
+    val sharedPreferences = activity.getSharedPreferences("TimeTable", Context.MODE_PRIVATE)
+    val lessonLength = sharedPreferences.getInt("lessonLength", 0)
+    val firstLesson = sharedPreferences.getFloat("firstLesson", 0.0f).toString()
+    val breakAmnt = sharedPreferences.getInt("breakAmnt", 0)
+    val listOfBreakStartTimes = mutableListOf<String>()
+    val listOfBreakLengths = mutableListOf<Int>()
+    for (i in 0 until breakAmnt) {
+        listOfBreakStartTimes.add(sharedPreferences.getFloat("break${i}StartTime", 0.0f).toString())
+        listOfBreakLengths.add(sharedPreferences.getInt("break${i}Length", 0))
+    }
+
+    var showInfo by remember {
+        mutableStateOf(false)
+    }
+
+    Column {
         TopAppBar(
             colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.primaryContainer),
             title = {
                 Text(text = "Stundenplan",
-                    style = MaterialTheme.typography.headlineSmall
+                    style = MaterialTheme.typography.headlineSmall,
+                    color = MaterialTheme.colorScheme.onPrimaryContainer
                 )},
             navigationIcon = {
                 IconButton(onClick = { activity.finish() }) {
                     Icon(
                         imageVector = Icons.Filled.ArrowBack,
                         contentDescription = null,
-                        modifier = Modifier.size(28.dp)
+                        modifier = Modifier.size(28.dp),
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer
+                    )
+                }
+            },
+            actions ={
+                //Info button
+                IconButton(
+                    onClick = { showInfo = !showInfo }) {
+                    Icon(
+                        imageVector = Icons.Outlined.Info,
+                        contentDescription = null,
+                        modifier = Modifier.size(28.dp),
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer
+                    )
+                }
+                //Edit button
+                IconButton(
+                    onClick = {
+                        val intent = Intent(activity, TimeTableSetupActivity::class.java).apply {
+                        putExtra(TimeTableSetupActivity.TYPE_KEY, "TimeSetup")
+                    }
+                    startActivity(activity, intent, null)
+                }) {
+                         Icon(
+                             imageVector = Icons.Outlined.Edit,
+                             contentDescription = null,
+                             modifier = Modifier.size(28.dp),
+                             tint = MaterialTheme.colorScheme.onPrimaryContainer
                          )
                 }
             },
             modifier = Modifier.fillMaxWidth()
         )
 
-        Column() {
+        //Start of the timetable --> One Row() with multiple Column() to create the table
+        Row(
+            modifier = Modifier
+                .verticalScroll(rememberScrollState())
+                .horizontalScroll(rememberScrollState())
+        ) {
+            //Left-handed lesson indexing with beginning time of each lesson or break
+            InfoColumn(
+                loadedLessons = loadedLessons,
+                breakAmnt = breakAmnt,
+                breaksStartTime = listOfBreakStartTimes,
+                firstLesson = firstLesson,
+                lessonLength = lessonLength,
+                breaksLength = listOfBreakLengths
+            )
 
+            //Creation of 5 Columns
+            loadedLessons.forEachIndexed { index, dailyLessons ->
+                //Width variable for variable Box sizes
+                Column(modifier = Modifier.width(250.dp)) {
+                    //Additional extraIndex to count lessons without breaks getting into the way
+                    var extraIndex = 0
+
+                    //Box with the day on top of each Column()
+                    Box(
+                        modifier = Modifier
+                            .size(250.dp, 50.dp)
+                            .padding(3.dp)
+                            .align(Alignment.CenterHorizontally)
+                            .border(
+                                width = 1.dp,
+                                color = MaterialTheme.colorScheme.primaryContainer
+                            )
+                    ) {
+                        Text(
+                            text = listOfDays[index],
+                            modifier = Modifier.align(Alignment.Center),
+                            style = MaterialTheme.typography.labelMedium
+                        )
+                    }
+
+                    //Core timetable
+                    //One Box for each lesson or break
+                    for (i in 0 until (dailyLessons.size + breakAmnt)) {
+                        //If the current index is saved as a break in listOfBreakIndexes --> Spacer Box
+                        if (listOfBreakIndexes.indexOf(i) != -1) {
+                            Box(
+                                modifier = Modifier
+                                    .size(250.dp, 100.dp)
+                            )
+                        }
+                        //Else creation of a Box containing all the information from the LessonData object
+                        else if (dailyLessons != emptyList<LessonData>() && dailyLessons.size != extraIndex) {
+                            LessonBox(subject = dailyLessons[extraIndex].subject, teacher = dailyLessons[extraIndex].teacher, room = dailyLessons[extraIndex].room)
+                            //ExtraIndex counted up only here as it does only index the lessons and NOT the breaks
+                            extraIndex++
                         }
                     }
                 }
+            }
+
+            //Right-handed lesson indexing with beginning time of each lesson or break
+            InfoColumn(
+                loadedLessons = loadedLessons,
+                breakAmnt = breakAmnt,
+                breaksStartTime = listOfBreakStartTimes,
+                firstLesson = firstLesson,
+                lessonLength = lessonLength,
+                breaksLength = listOfBreakLengths
+            )
+        }
+    }
+    if (showInfo) {
+        AlertDialog(
+            onDismissRequest = { showInfo = false },
+            text = {
+                Text(
+                    text = "Die Breite der Spalten ist auf eine bestimmte Größe festgelegt.\n\n" +
+                            "Zu lange Eingaben können horizontal gescrollt werden.",
+                    color = MaterialTheme.colorScheme.onPrimaryContainer,
+                    style = MaterialTheme.typography.labelMedium)
+            },
+            confirmButton = {
+                Text(
+                    text = "Schließen",
+                    color = MaterialTheme.colorScheme.secondary,
+                    style = MaterialTheme.typography.labelMedium,
+                    modifier = Modifier.clickable { showInfo = false }
+                )
+            },
+            containerColor = MaterialTheme.colorScheme.primaryContainer,
+            modifier = Modifier
+                .padding(5.dp)
+        )
+    }
+}
+
+//Data class to save objects via DataShare containing information about lessons
+data class LessonData(
+    var subject: String,
+    var teacher: String,
+    var room: String
+)
+
+
+//Implementation of Box with a darker border than the other Boxes
+// contains the information from the corresponding LessonData object
+@Composable
+fun LessonBox(subject: String, teacher: String, room: String) {
+    Box(
+        modifier = Modifier
+            .size(250.dp, 100.dp)
+            .padding(3.dp)
+            .border(
+                width = 1.dp,
+                color = MaterialTheme.colorScheme.onPrimaryContainer
+            ),
+        contentAlignment = Alignment.Center
+    ) {
+        Column {
+            if (subject != "") {
+                Text(
+                    modifier = Modifier
+                        .horizontalScroll(rememberScrollState())
+                        .align(Alignment.CenterHorizontally)
+                        .padding(horizontal = 5.dp),
+                    text = subject,
+                    style = MaterialTheme.typography.labelMedium
+                )
+            }
+            if (room != "") {
+                Text(
+                    modifier = Modifier
+                        .horizontalScroll(rememberScrollState())
+                        .align(Alignment.CenterHorizontally)
+                        .padding(horizontal = 5.dp),
+                    text = room,
+                    style = MaterialTheme.typography.labelMedium
+                )
+            }
+            if (teacher != "") {
+                Text(
+                    modifier = Modifier
+                        .horizontalScroll(rememberScrollState())
+                        .align(Alignment.CenterHorizontally)
+                        .padding(horizontal = 5.dp),
+                    text = teacher,
+                    style = MaterialTheme.typography.labelMedium
+                )
+            }
+        }
+    }
+}
+
+
+//Left-/Right-Handed info Column
+@Composable
+fun InfoColumn(loadedLessons: List<List<LessonData>>, breakAmnt: Int, breaksStartTime: List<String>, firstLesson: String, lessonLength: Int, breaksLength: List<Int>) {
+    Column {
+        //Determining how much lessons the longest day of the week has
+        var maxLessons = 0
+        for (dailyLessons in loadedLessons) {
+            if (dailyLessons.size > maxLessons) {
+                maxLessons = dailyLessons.size
+            }
+        }
+
+        //Variable for time management with custom break times
+        var lessonTimeIncrement = 0
+        //Variable for decreasing the number in the InfoColumn after a "Pause" String
+        var lessonNegIncrement = 0
+        //Additional extraIndex to count lessons without breaks getting into the way
+        var extraIndex = 0
+
+        //Clear the list of brake indexes needed earlier in the timetable core
+        listOfBreakIndexes.drop(listOfBreakIndexes.size)
+
+        //Spacer Box
+        Box(
+            modifier = Modifier
+                .size(100.dp, 50.dp)
+                .padding(3.dp)
+        )
+        //Loop for creating Boxes on the side
+        for (i in 0 until (maxLessons + breakAmnt)) {
+            //Boolean to avoid double creation of the same Box
+            var loopDone = false
+            //Loop through all saved break start time
+            for (breakTime in breaksStartTime) {
+                if (!loopDone) {
+                    //Variable = minutes of the currently looked at break
+                    var formattedBreakSubstring = breakTime.substringAfter('.')
+                    //When the Float wos like XX.n, it the n-Part will be n0 (fix for values 10, 20, etc.)
+                    if (formattedBreakSubstring == "1" || formattedBreakSubstring == "2" || formattedBreakSubstring == "3" || formattedBreakSubstring == "4" || formattedBreakSubstring == "5") {
+                        formattedBreakSubstring += "0"
+                    }
+                    //Format start time of the break the same way as the lesson start time is formatted
+                    val formattedBreakTime = "@" + DecimalFormat("00").format(breakTime.substringBefore('.').toInt()) + ":" + DecimalFormat("00").format(formattedBreakSubstring.toInt())
+                    //Check whether the start time of the currently looked at brake and lesson are the sa,e
+                    if (substringHelper(extraIndex, firstLesson, lessonLength, lessonTimeIncrement) == formattedBreakTime) {
+                        Box(
+                            modifier = Modifier
+                                .size(100.dp)
+                                .padding(3.dp)
+                                .border(
+                                    width = 1.dp,
+                                    color = MaterialTheme.colorScheme.primaryContainer
+                                )
+                        ) {
+                            //"Pause" String instead of indexing
+                            Text(
+                                modifier = Modifier
+                                    .align(Alignment.Center)
+                                    .scale(1.1f),
+                                text = "Pause",
+                                textDecoration = TextDecoration.Underline,
+                                style = MaterialTheme.typography.labelLarge
+                            )
+                            //String with the starting time of the current break
+                            Text(
+                                modifier = Modifier
+                                    .align(Alignment.BottomCenter)
+                                    .padding(3.dp)
+                                    .scale(0.8f),
+                                text = formattedBreakTime,
+                                style = MaterialTheme.typography.labelMedium
+                            )
+                            //Add length of current break to the increment
+                            lessonTimeIncrement += breaksLength[breaksStartTime.indexOf(breakTime)]
+                            //Add info that one moe brake exists to the indexing increment
+                            lessonNegIncrement++
+                            //Add the extraIndex (lessonIndex) into the listOfBreakIndexes list to include breaks in timetable core
+                            listOfBreakIndexes.add(i)
+                            //Prevent double creation of Boxes
+                            loopDone = true
+                        }
+                    }
+                    //When looped through all breaks, but none fitted
+                    else if (breakTime == breaksStartTime.last()) {
+                        Box(
+                            modifier = Modifier
+                                .size(100.dp)
+                                .padding(3.dp)
+                                .border(
+                                    width = 1.dp,
+                                    color = MaterialTheme.colorScheme.primaryContainer
+                                )
+                        ) {
+                            //String with the indexing of the lessons
+                            Text(
+                                modifier = Modifier
+                                    .align(Alignment.Center)
+                                    .scale(1.1f),
+                                text = "${i + 1 - lessonNegIncrement}:",
+                                textDecoration = TextDecoration.Underline,
+                                style = MaterialTheme.typography.labelLarge
+                            )
+                            //String with the starting time of the lesson
+                            Text(
+                                modifier = Modifier
+                                    .align(Alignment.BottomCenter)
+                                    .padding(3.dp)
+                                    .scale(0.8f),
+                                text = substringHelper(extraIndex, firstLesson, lessonLength, lessonTimeIncrement),
+                                style = MaterialTheme.typography.labelMedium
+                            )
+                            //Prevent double creation of Boxes
+                            loopDone = true
+                            //Counting up the lesson only index
+                            extraIndex++
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+//Function that moves the formatting and calculation of the lesson start times away from in-line
+fun substringHelper (int: Int, eductString: String, lessonLength: Int, increment: Int): String {
+    //Variable = minutes of the entered Time
+    var subString = eductString.substringAfter('.')
+    //Fix of 10, 20, etc.
+    if (subString == "1" || subString == "2" || subString == "3" || subString == "4" || subString == "5") {
+        subString += "0"
+    }
+    //Calculation based on start time of the first hour, lesson length, indexing of the current lesson (extraIndex!) and the increment calculated from the break times
+    //Formatting to "@hh:mm"
+    val productString = "@" + DecimalFormat("00").format((((subString.toInt() + int * lessonLength) + increment) / 60) + eductString.substringBefore('.').toInt()) + ":" + DecimalFormat("00").format((((subString.toInt()) + int * lessonLength) + increment) % 60)
+    //Return statement to use the formatted and calculated product in the timetable
+    return productString
+}

app/src/main/java/com/schoolapp/cleverclass/TimeTableSetupActivity.kt

@@ -0,0 +1,711 @@
+package com.schoolapp.cleverclass
+
+import android.app.TimePickerDialog
+import android.content.Context
+import android.content.Intent
+import android.icu.text.DecimalFormat
+import android.icu.text.DecimalFormatSymbols
+import android.icu.util.Calendar
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.text.selection.TextSelectionColors
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material.icons.outlined.Edit
+import androidx.compose.material.icons.outlined.Info
+import androidx.compose.material.ripple.LocalRippleTheme
+import androidx.compose.material.ripple.RippleAlpha
+import androidx.compose.material.ripple.RippleTheme
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Button
+import androidx.compose.material3.Checkbox
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.FilledTonalButton
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Tab
+import androidx.compose.material3.TabRow
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextFieldDefaults
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.unit.dp
+import androidx.core.content.ContextCompat.startActivity
+import com.schoolapp.cleverclass.LessonStoreManager.getLessons
+import com.schoolapp.cleverclass.LessonStoreManager.saveLessons
+import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
+import com.schoolapp.cleverclass.ui.theme.InputPrimaryColor
+import com.schoolapp.cleverclass.ui.theme.InputSecondaryColor
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import java.util.Locale
+
+private lateinit var activityType : String
+private lateinit var activityState : String
+private val listOfDays = listOf("Mo", "Di", "Mi", "Do", "Fr")
+
+//Custom ripple to remove effect when touching tabs
+private class CustomRippleTheme : RippleTheme {
+    @Composable
+    override fun defaultColor(): Color = Color.Unspecified
+
+    @Composable
+    override fun rippleAlpha(): RippleAlpha = RippleAlpha(
+        draggedAlpha = 0f,
+        focusedAlpha = 0f,
+        hoveredAlpha = 0f,
+        pressedAlpha = 0f
+    )
+}
+
+class TimeTableSetupActivity : ComponentActivity() {
+    companion object{
+        const val TYPE_KEY = "type_key"
+        const val STATE_KEY = "state_key"
+    }
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        //Defines setup type --> Time vs. Day
+        activityType = intent.getStringExtra(TYPE_KEY).toString()
+        //Defines curent day of week
+        activityState = intent.getStringExtra(STATE_KEY).toString()
+
+        //Load lessons of defined day from activityState
+        var lessons = listOf<LessonData>()
+        if (activityType == "DaySetup") {
+            CoroutineScope(Dispatchers.IO).launch {
+                getLessons(this@TimeTableSetupActivity, listOfDays[activityState.toInt()]).collect { savedLessons ->
+                    lessons = savedLessons.toList()
+                }
+            }
+        }
+
+        setContent {
+            CleverClassTheme {
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background
+                ) {
+                    TimeTableSetupContent(activity = this, lessons)
+                }
+            }
+        }
+    }
+}
+
+
+// Content of TimeTableSetup
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun TimeTableSetupContent(activity: ComponentActivity, loadedLessons: List<LessonData>){
+    //One-time definition of the inputField colorscheme
+    val inputFieldColors = TextFieldDefaults.outlinedTextFieldColors(
+        textColor = MaterialTheme.colorScheme.onPrimaryContainer,
+        containerColor = MaterialTheme.colorScheme.secondaryContainer,
+        cursorColor = InputPrimaryColor,
+        selectionColors = TextSelectionColors(
+            handleColor = InputPrimaryColor,
+            backgroundColor = InputSecondaryColor
+        ),
+        focusedBorderColor = InputSecondaryColor,
+        unfocusedBorderColor = Color.Transparent
+        )
+
+    //Declaration of most sharedPreferences-stored data
+    val sharedPreferences = activity.getSharedPreferences("TimeTable", Context.MODE_PRIVATE)
+    val editor = sharedPreferences.edit()
+
+    //Length of one lesson
+    var lessonLength by remember {
+        mutableStateOf(sharedPreferences.getInt("lessonLength", 0).toString())
+    }
+
+    //Number of breaks on one day
+    var breakAmnt by remember {
+        mutableStateOf(sharedPreferences.getInt("breakAmnt", 0).toString())
+    }
+
+    //Beginning time of the first lesson (Format: hh.mm)
+    var firstLesson by remember {
+        mutableStateOf(sharedPreferences.getFloat("firstLesson", 0.0f))
+    }
+
+    //Value to determine whether the first setup will be loaded again
+    var setupDone by remember {
+        mutableStateOf(sharedPreferences.getBoolean("setupDone", false))
+    }
+
+    //AlertDialog
+    var showInfo by remember {
+        mutableStateOf(false)
+    }
+
+    //Variable for loaded lessons from onCreate()
+    var lessons by remember {
+        mutableStateOf(loadedLessons)
+    }
+
+
+    Column {
+        TopAppBar(
+            colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.primaryContainer),
+            title = { Text(text = "") },
+            navigationIcon = {
+                IconButton(
+                    onClick = {
+                        activity.finish()
+                        if (setupDone) {
+                            val intent = Intent(activity, StundenplanActivity::class.java)
+                            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
+                            startActivity(activity, intent, null)
+                        }
+                        else {
+                            val intent = Intent(activity, MainActivity::class.java)
+                            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK)
+                            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
+                            startActivity(activity, intent, null)
+                        }
+                    }
+                ) {
+                    Icon(
+                        imageVector = Icons.Filled.ArrowBack,
+                        contentDescription = null,
+                        modifier = Modifier.size(28.dp),
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer
+                    )
+                }
+            },
+            modifier = Modifier.fillMaxWidth()
+        )
+
+        Column(
+            verticalArrangement = Arrangement.Center,
+            modifier = Modifier
+                .fillMaxHeight()
+                .verticalScroll(rememberScrollState())
+        ) {
+            //Background
+            Surface(
+                color = MaterialTheme.colorScheme.primaryContainer,
+                shape = RoundedCornerShape(20),
+                modifier = Modifier.padding(16.dp)
+            ) {
+                Column(horizontalAlignment = Alignment.CenterHorizontally,
+                    modifier = Modifier.padding(16.dp)
+                ) {
+                    //Title
+                    Row(verticalAlignment = Alignment.CenterVertically) {
+                        Text(
+                            text = "Stundenplan Setup",
+                            style = MaterialTheme.typography.labelMedium,
+                            color = MaterialTheme.colorScheme.onPrimaryContainer,
+                            modifier = Modifier.padding(10.dp)
+                        )
+                        
+                        Spacer(modifier = Modifier.weight(1f))
+
+                        //Info Button --> AlertDialog
+                        IconButton(onClick = { showInfo = !showInfo }) {
+                            Icon(
+                                imageVector = Icons.Outlined.Info,
+                                contentDescription = null,
+                                tint = MaterialTheme.colorScheme.onPrimaryContainer
+                            )
+                        }
+                    }
+
+                    Spacer(modifier = Modifier.height(16.dp))
+
+                    //Setup for basic time data (lesson/break length etc.)
+                    if (activityType == "TimeSetup") {
+                        //Time input begin of first lesson
+                        Text(
+                            text = "Beginn der 1. Stunde",
+                            modifier = Modifier.fillMaxWidth(),
+                            style = MaterialTheme.typography.labelMedium
+                        )
+                        OutlinedButton(
+                            onClick = {
+                                val c = Calendar.getInstance()
+                                val mHour = c.get(Calendar.HOUR_OF_DAY)
+                                val mMinute = c.get(Calendar.MINUTE)
+                                val timePickerDialog = TimePickerDialog(activity, TimePickerDialog.OnTimeSetListener(function = { view, h, m ->
+                                    firstLesson = h.toFloat() + (m.toFloat() / 100)
+                                    editor.putFloat("firstLesson", firstLesson)
+                                }), mHour, mMinute, true)
+                                timePickerDialog.show()
+                            },
+                            modifier = Modifier.align(Alignment.Start)
+                        ) {
+                            val locale = Locale.getDefault()
+                            val symbols = DecimalFormatSymbols(locale)
+                            symbols.decimalSeparator = ':'
+                            val decimalFormat = DecimalFormat("00.00", symbols)
+
+                            Text(
+                                text = decimalFormat.format(firstLesson) + " Uhr ",
+                                color = MaterialTheme.colorScheme.onPrimaryContainer)
+
+                            Icon(imageVector = Icons.Outlined.Edit, contentDescription = null)
+                        }
+
+                        Spacer(modifier = Modifier.height(16.dp))
+
+                        //Duration of one lesson
+                        OutlinedTextField(
+                            value = lessonLength,
+                            onValueChange = { lessonLength = it },
+                            label = { Text(text = "Länge einer Schulstunde in min") },
+                            modifier = Modifier.fillMaxWidth(),
+                            singleLine = true,
+                            shape = RoundedCornerShape(20),
+                            textStyle = MaterialTheme.typography.labelMedium,
+                            colors = inputFieldColors,
+                            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.NumberPassword)
+                        )
+
+                        Spacer(modifier = Modifier.height(16.dp))
+
+                        //Input amount of breaks
+                        OutlinedTextField(
+                            value = breakAmnt,
+                            onValueChange = { breakAmnt = it},
+                            label = { Text(text = "Anzahl der Pausen") },
+                            modifier = Modifier.fillMaxWidth(),
+                            singleLine = true,
+                            shape = RoundedCornerShape(20),
+                            textStyle = MaterialTheme.typography.labelMedium,
+                            colors = inputFieldColors,
+                            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.NumberPassword)
+                        )
+
+                        //Input of length and start time for each break
+                        if (breakAmnt != "") {
+                            //declaration of sharedPreferences for break data
+                            for (i in 0 until breakAmnt.toInt()) {
+                                var currentBreakStartTime by remember{
+                                    mutableStateOf(sharedPreferences.getFloat("break${i}StartTime", 0.0f))
+                                }
+                                var currentBreakLength by remember{
+                                    mutableStateOf(sharedPreferences.getInt("break${i}Length", 0).toString())
+                                }
+
+                                Spacer(modifier = Modifier.height(16.dp))
+
+                                //Input start time (break)
+                                Text(
+                                    text = "Startzeit der ${i + 1}. Pause:",
+                                    modifier = Modifier.fillMaxWidth(),
+                                    style = MaterialTheme.typography.labelMedium
+                                )
+                                OutlinedButton(
+                                    onClick = {
+                                        val c = Calendar.getInstance()
+                                        val mHour = c.get(Calendar.HOUR_OF_DAY)
+                                        val mMinute = c.get(Calendar.MINUTE)
+                                        val timePickerDialog = TimePickerDialog(activity, TimePickerDialog.OnTimeSetListener(function = { view, h, m ->
+                                            currentBreakStartTime = h.toFloat() + (m.toFloat() / 100)
+                                            editor.putFloat("break${i}StartTime", currentBreakStartTime)
+                                        }), mHour, mMinute, true)
+                                        timePickerDialog.show()
+                                    },
+                                    modifier = Modifier.align(Alignment.Start)
+                                ) {
+                                    val locale = Locale.getDefault()
+                                    val symbols = DecimalFormatSymbols(locale)
+                                    symbols.decimalSeparator = ':'
+                                    val decimalFormat = DecimalFormat("00.00", symbols)
+
+                                    Text(
+                                        text = decimalFormat.format(currentBreakStartTime) + " Uhr ",
+                                        color = MaterialTheme.colorScheme.onPrimaryContainer,
+                                        style = MaterialTheme.typography.labelMedium
+                                    )
+
+                                    Icon(imageVector = Icons.Outlined.Edit, contentDescription = null)
+                                }
+
+                                Spacer(modifier = Modifier.height(5.dp))
+
+                                //Input duration (break)
+                                OutlinedTextField(
+                                    value = currentBreakLength,
+                                    onValueChange = {
+                                        currentBreakLength = it
+                                        if (currentBreakLength != "") {
+                                            editor.putInt("break${i}Length", currentBreakLength.toInt())
+                                        }},
+                                    label = { Text(text = "Länge der ${i + 1}. Pause in min") },
+                                    modifier = Modifier.fillMaxWidth(),
+                                    singleLine = true,
+                                    shape = RoundedCornerShape(20),
+                                    textStyle = MaterialTheme.typography.labelMedium,
+                                    colors = inputFieldColors,
+                                    keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.NumberPassword)
+                                )
+                            }
+                        }
+
+                        Spacer(modifier = Modifier.height(10.dp))
+
+                        Row {
+                            //Go back to StundenplanActivity
+                            FilledTonalButton(
+                                onClick = {
+                                    editor.putInt("lessonLength", lessonLength.toInt())
+                                    editor.putInt("breakAmnt", breakAmnt.toInt())
+                                    editor.apply()
+                                    activity.finish()
+                                    if (setupDone) {
+                                        //Reopen of activity so values will be updated
+                                        val intent = Intent(activity, StundenplanActivity::class.java)
+                                        //Remove previous StundenplanActivity from activity stack so when going back later it won't exist twice
+                                        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
+                                        startActivity(activity, intent, null)
+                                    }
+                                    else {
+                                        val intent = Intent(activity, MainActivity::class.java)
+                                        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                                        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK)
+                                        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
+                                        startActivity(activity, intent, null)
+                                    }
+                                },
+                                modifier = Modifier
+                                    .padding(5.dp)
+                                    .weight(1f)
+                            ) {
+                                Text(
+                                    text = "Zurück",
+                                    color = MaterialTheme.colorScheme.secondary,
+                                    style = MaterialTheme.typography.labelMedium
+                                )
+                            }
+
+                            Spacer(modifier = Modifier
+                                .width(5.dp)
+                            )
+
+                            //Move on to DaySetup
+                            Button(
+                                onClick = {
+                                    editor.putInt("lessonLength", lessonLength.toInt())
+                                    editor.putInt("breakAmnt", breakAmnt.toInt())
+                                    editor.apply()
+                                    activity.finish()
+                                    val intent = Intent(activity, TimeTableSetupActivity::class.java).apply { 
+                                        putExtra(TimeTableSetupActivity.TYPE_KEY, "DaySetup")
+                                        //State 0 for indexing days (0..4)
+                                        putExtra(TimeTableSetupActivity.STATE_KEY, "0")
+                                    }
+                                    startActivity(activity, intent, null)
+                                },
+                                modifier = Modifier
+                                    .padding(5.dp)
+                                    .weight(1f)
+                            ) {
+                                Text(
+                                    text = "Weiter",
+                                    style = MaterialTheme.typography.labelMedium
+                                )
+                            }
+                        }
+                    }
+
+                    //DaySetup for information on the lessons (teacher, subject, amount per day, etc.)
+                    else if (activityType == "DaySetup") {
+                        //State that defines the current day (e.g. for LessonData or the Tab highlighting)
+                        val state by remember {
+                            mutableStateOf(activityState.toInt())
+                        }
+
+                        //SharedPreferences for the amount of hours of each day (indexed by state --> 0..4)
+                        var currentLessonAmount by remember {
+                            mutableStateOf(sharedPreferences.getInt("lessonAmount${listOfDays[state]}", 0).toString())
+                        }
+
+                        //TabRow with Tabs to visualize the days; no onClick fun and thus the custom ripple theme
+                        CompositionLocalProvider(LocalRippleTheme provides CustomRippleTheme()) {
+                            TabRow(selectedTabIndex = state,
+                                containerColor = MaterialTheme.colorScheme.primaryContainer) {
+                                for (day in listOfDays) {
+                                    Tab(selected = false,
+                                        onClick = {},
+                                        modifier = Modifier.padding(5.dp)
+                                    ) {
+                                        Text(
+                                            text = day,
+                                            color = MaterialTheme.colorScheme.onPrimaryContainer,
+                                            style = MaterialTheme.typography.labelMedium
+                                        )
+                                    }
+                                }
+                            }
+                        }
+
+                        Spacer(modifier = Modifier.height(16.dp))
+
+                        //Input of the amount of lessons on the current day
+                        OutlinedTextField(
+                            value = currentLessonAmount,
+                            onValueChange = {
+                                currentLessonAmount = it
+                                if (currentLessonAmount == "") {
+                                    editor.putInt("lessonAmount${listOfDays[state]}", 0)
+                                }
+                                else {
+                                    editor.putInt("lessonAmount${listOfDays[state]}", currentLessonAmount.toInt())
+                                }
+                            },
+                            label = { Text(text = "Anzahl der Schulstunden (${listOfDays[state]})") },
+                            modifier = Modifier.fillMaxWidth(),
+                            singleLine = true,
+                            shape = RoundedCornerShape(20),
+                            textStyle = MaterialTheme.typography.labelMedium,
+                            colors = inputFieldColors,
+                            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.NumberPassword)
+                        )
+
+                        //Creation of TextField for further input for the lessons themselves + saveUsage into DataStore --> saveLessonUsage(...)
+                        if (currentLessonAmount != "") {
+                            if (currentLessonAmount != "0") {
+                                //Creation/Removal of the current amount of LessonData object depending pn currentLessonAmount
+                                for (i in lessons.size until currentLessonAmount.toInt()) {
+                                    lessons = lessons + LessonData("", "", "")
+                                }
+                                while (currentLessonAmount.toInt() < lessons.size) {
+                                    lessons = lessons.dropLast(1)
+                                }
+
+                                lessons.forEachIndexed { index, lessonData ->
+                                    //Input variables
+                                    var currentSubject by remember {
+                                        mutableStateOf(lessonData.subject)
+                                    }
+                                    var currentTeacher by remember {
+                                        mutableStateOf(lessonData.teacher)
+                                    }
+                                    var currentRoom by remember {
+                                        mutableStateOf(lessonData.room)
+                                    }
+
+                                    //Input of the subject of the current lesson
+                                    OutlinedTextField(
+                                        value = currentSubject,
+                                        onValueChange = {
+                                            currentSubject = it
+                                            lessonData.subject = it
+                                            saveLessonsUsage(activity, lessons, state)
+                                        },
+                                        label = { Text(text = "Fach der ${index + 1}. Stunde") },
+                                        modifier = Modifier.fillMaxWidth(),
+                                        singleLine = true,
+                                        shape = RoundedCornerShape(20),
+                                        textStyle = MaterialTheme.typography.labelMedium,
+                                        colors = inputFieldColors,
+                                    )
+
+                                    //Input of the room of the current lesson
+                                    OutlinedTextField(
+                                        value = currentRoom,
+                                        onValueChange = {
+                                            currentRoom = it
+                                            lessonData.room = it
+                                            saveLessonsUsage(activity, lessons, state)
+                                        },
+                                        label = { Text(text = "Raum der ${index + 1}. Stunde") },
+                                        modifier = Modifier.fillMaxWidth(),
+                                        singleLine = true,
+                                        shape = RoundedCornerShape(20),
+                                        textStyle = MaterialTheme.typography.labelMedium,
+                                        colors = inputFieldColors,
+                                    )
+
+                                    //Input of the teacher of the current lesson
+                                    OutlinedTextField(
+                                        value = currentTeacher,
+                                        onValueChange = {
+                                            currentTeacher = it
+                                            lessonData.teacher = it
+                                            saveLessonsUsage(activity, lessons, state)
+                                        },
+                                        label = { Text(text = "Lehrer der ${index + 1}. Stunde") },
+                                        modifier = Modifier.fillMaxWidth(),
+                                        singleLine = true,
+                                        shape = RoundedCornerShape(20),
+                                        textStyle = MaterialTheme.typography.labelMedium,
+                                        colors = inputFieldColors,
+                                    )
+                                }
+                                saveLessonsUsage(activity, lessons, state)
+                            }
+                            //save an empty list into DataStore currentLessonAmount == 0
+                            else {
+                                saveLessonsUsage(activity, emptyList(), state)
+                            }
+
+                        }
+
+                        Spacer(modifier = Modifier.height(16.dp))
+
+                        //Checkbox on the friday page (state == 4) to prevent setup from automatically openening next time
+                        if (state == 4) {
+                            Box(
+                                modifier = Modifier
+                                    .height(2.dp)
+                                    .fillMaxWidth()
+                                    .background(color = MaterialTheme.colorScheme.onPrimaryContainer)
+                            )
+
+                            Row {
+                                Text(
+                                    text = "Ertes Setup beendet?",
+                                    modifier = Modifier.align(Alignment.CenterVertically),
+                                    style = MaterialTheme.typography.labelMedium
+                                    )
+                                Checkbox(checked = setupDone, onCheckedChange = {setupDone = !setupDone})
+                            }
+                        }
+
+                        //Go back
+                        Row {
+                            FilledTonalButton(
+                                onClick = {
+                                    activity.finish()
+                                    //To TimeSetup
+                                    if (state == 0) {
+                                        val intent = Intent(activity, TimeTableSetupActivity::class.java).apply {
+                                            putExtra(TimeTableSetupActivity.TYPE_KEY, "TimeSetup")
+                                        }
+                                        startActivity(activity, intent, null)
+                                    }
+                                    //To the day before (STATE_KEY -= 1)
+                                    else {
+                                        val intent = Intent(activity, TimeTableSetupActivity::class.java).apply {
+                                            putExtra(TimeTableSetupActivity.TYPE_KEY, "DaySetup")
+                                            putExtra(TimeTableSetupActivity.STATE_KEY, "${state - 1}")
+                                        }
+                                        startActivity(activity, intent, null)
+                                    }
+                                },
+                                modifier = Modifier
+                                    .padding(5.dp)
+                                    .weight(1f)
+                            ) {
+                                Text(
+                                    text = "Zurück",
+                                    color = MaterialTheme.colorScheme.secondary,
+                                    style = MaterialTheme.typography.labelMedium
+                                )
+                            }
+
+                            Spacer(modifier = Modifier
+                                .width(5.dp)
+                            )
+
+                            //Go forwards
+                            Button(
+                                onClick = {
+                                    activity.finish()
+                                    //To next day (STATE_KEY += 1)
+                                    if (state != 4) {
+                                        val intent = Intent(activity, TimeTableSetupActivity::class.java).apply {
+                                            putExtra(TimeTableSetupActivity.TYPE_KEY, "DaySetup")
+                                            putExtra(TimeTableSetupActivity.STATE_KEY, "${state + 1}")
+                                        }
+                                        startActivity(activity, intent, null)
+                                    }
+                                    //To Stundenplan
+                                    else {
+                                        editor.putBoolean("setupDone", setupDone)
+                                        //Reopen of activity so values will be updated
+                                        val intent = Intent(activity, StundenplanActivity::class.java)
+                                        //Remove previous StundenplanActivity from activity stack so when going back later it won't exist twice
+                                        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
+                                        startActivity(activity, intent, null)
+                                    }
+                                    editor.apply()
+                                },
+                                modifier = Modifier
+                                    .padding(5.dp)
+                                    .weight(1f)
+                            ) {
+                                Text(
+                                    text = "Weiter",
+                                    style = MaterialTheme.typography.labelMedium
+                                )
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    //AlertDialog to inform the user of the possibility of changing all inputs later
+    if (showInfo) {
+        AlertDialog(
+            onDismissRequest = { showInfo = false },
+            text = {
+                Text(
+                    text = "Alle Eingaben können später geändert werden.",
+                    color = MaterialTheme.colorScheme.onPrimaryContainer,
+                    style = MaterialTheme.typography.labelMedium)
+            },
+            confirmButton = {
+                Text(
+                    text = "Schließen",
+                    color = MaterialTheme.colorScheme.secondary,
+                    style = MaterialTheme.typography.labelMedium,
+                    modifier = Modifier.clickable { showInfo = false }
+                )
+            },
+            containerColor = MaterialTheme.colorScheme.primaryContainer,
+            modifier = Modifier
+                .padding(5.dp)
+        )
+    }
+}
+
+//Function that implements the save of List<LessonData>
+fun saveLessonsUsage(context: Context, lessons: List<LessonData>, int: Int) {
+    CoroutineScope(Dispatchers.IO).launch {
+        saveLessons(context, lessons, listOfDays[int])
+    }
+}

app/src/main/java/com/schoolapp/cleverclass/Utilities.kt

@@ -0,0 +1,117 @@
+package com.schoolapp.cleverclass
+
+import android.app.Activity
+import android.content.Context
+import android.content.Intent
+import androidx.activity.ComponentActivity
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.ColorFilter
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.unit.dp
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import java.io.File
+
+
+const val NO_INTERNET_CONNECTION_CODE = -1
+
+fun formatFloat(number: Float): String {
+    var formattedString = number.toString()
+
+    formattedString = formattedString.substring(0, if(formattedString.length == 3) 3 else 4)
+
+    if(number.isNaN())
+        formattedString = "0.0"
+
+    return formattedString
+}
+
+@Composable
+fun LoadingScreen(){
+    Box(
+        modifier = Modifier.fillMaxSize(),
+        contentAlignment = Alignment.Center
+    ){
+        CircularProgressIndicator(color = MaterialTheme.colorScheme.secondary)
+    }
+}
+@Composable
+fun StaticLoadingScreen(){
+    Box(
+        modifier = Modifier.fillMaxSize(),
+        contentAlignment = Alignment.Center
+    ){
+        Column(horizontalAlignment = Alignment.CenterHorizontally) {
+            Text(
+                text = "Loading...",
+                style = MaterialTheme.typography.bodySmall,
+                modifier = Modifier.padding(start = 16.dp, end = 16.dp),
+                color = MaterialTheme.colorScheme.onBackground
+            )
+            Spacer(modifier = Modifier.height(8.dp))
+            Image(
+                painter = painterResource(id = R.drawable.static_loading_icon),
+                contentDescription = null,
+                colorFilter = ColorFilter.tint(MaterialTheme.colorScheme.onBackground),
+                contentScale = ContentScale.FillBounds
+            )
+        }
+    }
+}
+
+fun deleteAllData(activity: ComponentActivity){
+    val sharedPrefs = listOf("Settings", "DSBmobile", "gradeAverages", "TimeTable")
+    for (prefName in sharedPrefs) {
+        val sharedPreferences = activity.getSharedPreferences(prefName, Context.MODE_PRIVATE)
+        val editor = sharedPreferences.edit()
+        editor.clear()
+        editor.apply()
+    }
+
+    clearFolder(activity.filesDir)
+    clearFolder(activity.cacheDir)
+
+    CoroutineScope(Dispatchers.Main).launch {
+        restartApp(activity)
+    }
+}
+
+fun clearFolder(directory: File) {
+    if (directory.exists()) {
+        val files = directory.listFiles()
+        if (files != null) {
+            for (file in files) {
+                if (file.isDirectory) {
+                    clearFolder(file)
+                }
+                file.delete()
+            }
+        }
+    }
+}
+
+fun restartApp(context: Context) {
+    val packageManager = context.packageManager
+    val intent = packageManager.getLaunchIntentForPackage(context.packageName)
+    intent?.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
+    intent?.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+    context.startActivity(intent)
+    if (context is Activity) {
+        context.finish()
+    }
+    Runtime.getRuntime().exit(0)
+}

app/src/main/java/com/schoolapp/cleverclass/ui/theme/Color.kt

@@ -4,10 +4,22 @@ import androidx.compose.ui.graphics.Color
 
 val Black100 = Color(0xFF000000)
 val Black90 = Color(0xFF1F1F1F)
-val Black70 = Color(0xFF333333)
+val Black80 = Color(0xFF333333)
+val Black70 = Color(0xFF4B4B4B)
 
 val White100 = Color(0xFFFFFFFF)
-val White90 = Color(0xFFEBEBEB)
-val White70 = Color(0xFFD3D3D3)
+val White90 = Color(0xFFFAFAFA)
+val White80 = Color(0xFFD3D3D3)
+val White70 = Color(0xFFAFAFAF)
+
 
 val TextOnColouredButton = Color(0xFF121212)
+val MiddleColor = Color(0xFF808080)
+
+val dismissLight = Color(0xFF536DFE)
+val dismissDark = Color(0xFF448AFF)
+
+val InputPrimaryColor = Color(0xFF3F57E0)
+val InputSecondaryColor = Color(0x7E4154FF)
+
+val testColor = Color(0xFF00FF00)

app/src/main/java/com/schoolapp/cleverclass/ui/theme/Theme.kt

@@ -18,15 +18,23 @@ import androidx.core.view.WindowCompat
 
 private val DarkColorScheme = darkColorScheme(
     background = Black90,
-    primaryContainer = Black70,
-    onPrimary = White100,
+    primaryContainer = Black80,
+    secondaryContainer = Black70,
+    onPrimaryContainer = White100,
+    secondary = dismissDark,
+    onBackground = White100,
+    outlineVariant = Black80,
     primary = Color(0xFF536DFE)
 )
 
 private val LightColorScheme = lightColorScheme(
     background = White90,
-    primaryContainer = White70,
-    onPrimary = Black100,
+    primaryContainer = White80,
+    secondaryContainer = White70,
+    onPrimaryContainer = Black100,
+    secondary = dismissLight,
+    onBackground = Black100,
+    outlineVariant = White80,
     primary = Color(0xFF8396FF)
 )
 
@@ -50,7 +58,7 @@ fun CleverClassTheme(
     if (!view.isInEditMode) {
         SideEffect {
             val window = (view.context as Activity).window
-            window.statusBarColor = Black70.toArgb()
+            window.statusBarColor = Black80.toArgb()
             WindowCompat.getInsetsController(window, view).isAppearanceLightStatusBars = darkTheme
         }
     }

app/src/main/java/com/schoolapp/cleverclass/ui/theme/Type.kt

@@ -17,6 +17,13 @@ val Typography = Typography(
         lineHeight = 24.sp,
         letterSpacing = 0.5.sp
     ),
+    labelLarge = TextStyle(
+        fontFamily = FontFamily(Font(R.font.arlrdbd, FontWeight.Normal)),
+        fontWeight = FontWeight.Normal,
+        fontSize = 24.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.5.sp
+    ),
     headlineMedium = TextStyle(
         fontFamily = FontFamily(Font(R.font.arlrdbd, FontWeight.Normal)),
         fontWeight = FontWeight.Normal,

app/src/main/res/drawable/baseline_open_in_browser_24.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M19,4L5,4c-1.11,0 -2,0.9 -2,2v12c0,1.1 0.89,2 2,2h4v-2L5,18L5,8h14v10h-4v2h4c1.1,0 2,-0.9 2,-2L21,6c0,-1.1 -0.89,-2 -2,-2zM12,10l-4,4h3v6h2v-6h3l-4,-4z"/>
+</vector>

app/src/main/res/drawable/baseline_visibility_24.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M12,4.5C7,4.5 2.73,7.61 1,12c1.73,4.39 6,7.5 11,7.5s9.27,-3.11 11,-7.5c-1.73,-4.39 -6,-7.5 -11,-7.5zM12,17c-2.76,0 -5,-2.24 -5,-5s2.24,-5 5,-5 5,2.24 5,5 -2.24,5 -5,5zM12,9c-1.66,0 -3,1.34 -3,3s1.34,3 3,3 3,-1.34 3,-3 -1.34,-3 -3,-3z"/>
+</vector>

app/src/main/res/drawable/baseline_visibility_off_24.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M12,7c2.76,0 5,2.24 5,5 0,0.65 -0.13,1.26 -0.36,1.83l2.92,2.92c1.51,-1.26 2.7,-2.89 3.43,-4.75 -1.73,-4.39 -6,-7.5 -11,-7.5 -1.4,0 -2.74,0.25 -3.98,0.7l2.16,2.16C10.74,7.13 11.35,7 12,7zM2,4.27l2.28,2.28 0.46,0.46C3.08,8.3 1.78,10.02 1,12c1.73,4.39 6,7.5 11,7.5 1.55,0 3.03,-0.3 4.38,-0.84l0.42,0.42L19.73,22 21,20.73 3.27,3 2,4.27zM7.53,9.8l1.55,1.55c-0.05,0.21 -0.08,0.43 -0.08,0.65 0,1.66 1.34,3 3,3 0.22,0 0.44,-0.03 0.65,-0.08l1.55,1.55c-0.67,0.33 -1.41,0.53 -2.2,0.53 -2.76,0 -5,-2.24 -5,-5 0,-0.79 0.2,-1.53 0.53,-2.2zM11.84,9.02l3.15,3.15 0.02,-0.16c0,-1.66 -1.34,-3 -3,-3l-0.17,0.01z"/>
+</vector>

app/src/main/res/drawable/ic_launcher_background.xml

@@ -1,170 +1,74 @@
 <?xml version="1.0" encoding="utf-8"?>
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="108dp"
+<vector
     android:height="108dp"
+    android:width="108dp"
+    android:viewportHeight="108"
     android:viewportWidth="108"
-    android:viewportHeight="108">
-    <path
-        android:fillColor="#3DDC84"
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#3DDC84"
           android:pathData="M0,0h108v108h-108z"/>
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M9,0L9,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,0L19,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,0L29,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,0L39,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,0L49,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,0L59,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,0L69,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,0L79,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M89,0L89,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M99,0L99,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,9L108,9"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,19L108,19"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,29L108,29"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,39L108,39"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,49L108,49"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,59L108,59"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,69L108,69"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,79L108,79"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,89L108,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,99L108,99"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,29L89,29"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,39L89,39"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,49L89,49"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,59L89,59"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,69L89,69"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,79L89,79"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,19L29,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,19L39,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,19L49,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,19L59,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,19L69,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,19L79,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
+    <path android:fillColor="#00000000" android:pathData="M9,0L9,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,0L19,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M29,0L29,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M39,0L39,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M49,0L49,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M59,0L59,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M69,0L69,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M79,0L79,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M89,0L89,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M99,0L99,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,9L108,9"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,19L108,19"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,29L108,29"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,39L108,39"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,49L108,49"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,59L108,59"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,69L108,69"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,79L108,79"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,89L108,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,99L108,99"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,29L89,29"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,39L89,39"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,49L89,49"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,59L89,59"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,69L89,69"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,79L89,79"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M29,19L29,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M39,19L39,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M49,19L49,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M59,19L59,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M69,19L69,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M79,19L79,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
 </vector>

app/src/main/res/drawable/static_loading_icon.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="36dp"
+    android:height="36dp"
+    android:viewportWidth="960"
+    android:viewportHeight="960">
+  <path
+      android:pathData="M480,880q-83,0 -156,-31.5T197,763q-54,-54 -85.5,-127T80,480q0,-83 31.5,-156T197,197q54,-54 127,-85.5T480,80q83,0 156,31.5T763,197q54,54 85.5,127T880,480q0,83 -31.5,156T763,763q-54,54 -127,85.5T480,880ZM480,800q64,0 123,-24t104,-69L480,480v-320q-134,0 -227,93t-93,227q0,134 93,227t227,93Z"
+      android:fillColor="#e8eaed"/>
+</vector>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@mipmap/ic_launcher_background"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@mipmap/ic_launcher_background"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi/ic_launcher.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>

app/src/main/res/mipmap-anydpi/ic_launcher_round.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>

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

@@ -6,5 +6,8 @@
     <string name="title_activity_stundenplan">StundenplanActivity</string>
     <string name="title_activity_noten">NotenActivity</string>
     <string name="title_activity_fach">FachActivity</string>
-    <string name="dialog_schließen">Schließen</string>
+    <string name="title_activity_dsbactivity">DSBActivity</string>
+    <string name="title_activity_dsbday_view">DSBDayViewActivity</string>
+    <string name="title_activity_dsblogin">DSBLoginActivity</string>
+    <string name="title_activity_timetable_setup">TimetableSetupActivity</string>
 </resources>

app/src/main/res/xml/data_extraction_rules.xml

@@ -5,7 +5,7 @@
 -->
 <data-extraction-rules>
     <cloud-backup>
-        <!-- TODO: Use <include> and <exclude> to control what is backed up.
+        <!-- Use <include> and <exclude> to control what is backed up.
         <include .../>
         <exclude .../>
         -->