This was done a few weeks ago; Create a new project based on 2023 standards.

app/build.gradle

@@ -1,20 +1,23 @@
 plugins {
     id 'com.android.application'
-    id 'kotlin-android'
+    id 'org.jetbrains.kotlin.android'
 }
 
 android {
-    compileSdkVersion 30
-    buildToolsVersion "30.0.3"
+    namespace 'com.hyperling.breakthehabit'
+    compileSdk 33
 
     defaultConfig {
         applicationId "com.hyperling.breakthehabit"
-        minSdkVersion 16
-        targetSdkVersion 30
+        minSdk 21
+        targetSdk 33
         versionCode 1
         versionName "1.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        vectorDrawables {
+            useSupportLibrary true
+        }
     }
 
     buildTypes {
@@ -30,18 +33,34 @@ android {
     kotlinOptions {
         jvmTarget = '1.8'
     }
+    buildFeatures {
+        compose true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion '1.3.2'
+    }
+    packagingOptions {
+        resources {
+            excludes += '/META-INF/{AL2.0,LGPL2.1}'
+        }
+    }
 }
 
 dependencies {
 
-    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
-    implementation 'androidx.core:core-ktx:1.2.0'
-    implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'com.google.android.material:material:1.1.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    implementation 'androidx.navigation:navigation-fragment-ktx:2.2.2'
-    implementation 'androidx.navigation:navigation-ui-ktx:2.2.2'
-    testImplementation 'junit:junit:4.+'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    implementation 'androidx.core:core-ktx:1.8.0'
+    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.3.1'
+    implementation 'androidx.activity:activity-compose:1.5.1'
+    implementation platform('androidx.compose:compose-bom:2022.10.00')
+    implementation 'androidx.compose.ui:ui'
+    implementation 'androidx.compose.ui:ui-graphics'
+    implementation 'androidx.compose.ui:ui-tooling-preview'
+    implementation 'androidx.compose.material3:material3'
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+    androidTestImplementation platform('androidx.compose:compose-bom:2022.10.00')
+    androidTestImplementation 'androidx.compose.ui:ui-test-junit4'
+    debugImplementation 'androidx.compose.ui:ui-tooling'
+    debugImplementation 'androidx.compose.ui:ui-test-manifest'
 }

app/src/main/AndroidManifest.xml

@@ -1,18 +1,22 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.hyperling.breakthehabit">
+    xmlns:tools="http://schemas.android.com/tools">
 
     <application
         android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.BreakTheHabit">
+        android:theme="@style/Theme.BreakTheHabit"
+        tools:targetApi="31">
         <activity
             android:name=".MainActivity"
+            android:exported="true"
             android:label="@string/app_name"
-            android:theme="@style/Theme.BreakTheHabit.NoActionBar">
+            android:theme="@style/Theme.BreakTheHabit">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/src/main/java/com/hyperling/breakthehabit/FirstFragment.kt

@@ -1,31 +0,0 @@
-package com.hyperling.breakthehabit
-
-import android.os.Bundle
-import androidx.fragment.app.Fragment
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
-import android.widget.Button
-import androidx.navigation.fragment.findNavController
-
-/**
- * A simple [Fragment] subclass as the default destination in the navigation.
- */
-class FirstFragment : Fragment() {
-
-    override fun onCreateView(
-            inflater: LayoutInflater, container: ViewGroup?,
-            savedInstanceState: Bundle?
-    ): View? {
-        // Inflate the layout for this fragment
-        return inflater.inflate(R.layout.fragment_first, container, false)
-    }
-
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        super.onViewCreated(view, savedInstanceState)
-
-        view.findViewById<Button>(R.id.button_first).setOnClickListener {
-            findNavController().navigate(R.id.action_FirstFragment_to_SecondFragment)
-        }
-    }
-}

app/src/main/java/com/hyperling/breakthehabit/MainActivity.kt

@@ -1,38 +1,43 @@
 package com.hyperling.breakthehabit
 
 import android.os.Bundle
-import com.google.android.material.floatingactionbutton.FloatingActionButton
-import com.google.android.material.snackbar.Snackbar
-import androidx.appcompat.app.AppCompatActivity
-import android.view.Menu
-import android.view.MenuItem
-
-class MainActivity : AppCompatActivity() {
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+import com.hyperling.breakthehabit.ui.theme.BreakTheHabitTheme
 
+class MainActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
-        setSupportActionBar(findViewById(R.id.toolbar))
-
-        findViewById<FloatingActionButton>(R.id.fab).setOnClickListener { view ->
-            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
-                    .setAction("Action", null).show()
+        setContent {
+            BreakTheHabitTheme {
+                // A surface container using the 'background' color from the theme
+                Surface(modifier = Modifier.fillMaxSize(), color = MaterialTheme.colorScheme.background) {
+                    Greeting("Android")
+                }
+            }
         }
     }
+}
 
-    override fun onCreateOptionsMenu(menu: Menu): Boolean {
-        // Inflate the menu; this adds items to the action bar if it is present.
-        menuInflater.inflate(R.menu.menu_main, menu)
-        return true
-    }
+@Composable
+fun Greeting(name: String, modifier: Modifier = Modifier) {
+    Text(
+            text = "Hello $name!",
+            modifier = modifier
+    )
+}
 
-    override fun onOptionsItemSelected(item: MenuItem): Boolean {
-        // Handle action bar item clicks here. The action bar will
-        // automatically handle clicks on the Home/Up button, so long
-        // as you specify a parent activity in AndroidManifest.xml.
-        return when (item.itemId) {
-            R.id.action_settings -> true
-            else -> super.onOptionsItemSelected(item)
-        }
+@Preview(showBackground = true)
+@Composable
+fun GreetingPreview() {
+    BreakTheHabitTheme {
+        Greeting("Android")
     }
 }

app/src/main/java/com/hyperling/breakthehabit/SecondFragment.kt

@@ -1,31 +0,0 @@
-package com.hyperling.breakthehabit
-
-import android.os.Bundle
-import androidx.fragment.app.Fragment
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
-import android.widget.Button
-import androidx.navigation.fragment.findNavController
-
-/**
- * A simple [Fragment] subclass as the second destination in the navigation.
- */
-class SecondFragment : Fragment() {
-
-    override fun onCreateView(
-            inflater: LayoutInflater, container: ViewGroup?,
-            savedInstanceState: Bundle?
-    ): View? {
-        // Inflate the layout for this fragment
-        return inflater.inflate(R.layout.fragment_second, container, false)
-    }
-
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        super.onViewCreated(view, savedInstanceState)
-
-        view.findViewById<Button>(R.id.button_second).setOnClickListener {
-            findNavController().navigate(R.id.action_SecondFragment_to_FirstFragment)
-        }
-    }
-}

app/src/main/java/com/hyperling/breakthehabit/ui/theme/Color.kt

@@ -0,0 +1,11 @@
+package com.hyperling.breakthehabit.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Purple80 = Color(0xFFD0BCFF)
+val PurpleGrey80 = Color(0xFFCCC2DC)
+val Pink80 = Color(0xFFEFB8C8)
+
+val Purple40 = Color(0xFF6650a4)
+val PurpleGrey40 = Color(0xFF625b71)
+val Pink40 = Color(0xFF7D5260)

app/src/main/java/com/hyperling/breakthehabit/ui/theme/Theme.kt

@@ -0,0 +1,70 @@
+package com.hyperling.breakthehabit.ui.theme
+
+import android.app.Activity
+import android.os.Build
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.dynamicDarkColorScheme
+import androidx.compose.material3.dynamicLightColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.SideEffect
+import androidx.compose.ui.graphics.toArgb
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalView
+import androidx.core.view.WindowCompat
+
+private val DarkColorScheme = darkColorScheme(
+        primary = Purple80,
+        secondary = PurpleGrey80,
+        tertiary = Pink80
+)
+
+private val LightColorScheme = lightColorScheme(
+        primary = Purple40,
+        secondary = PurpleGrey40,
+        tertiary = Pink40
+
+        /* Other default colors to override
+    background = Color(0xFFFFFBFE),
+    surface = Color(0xFFFFFBFE),
+    onPrimary = Color.White,
+    onSecondary = Color.White,
+    onTertiary = Color.White,
+    onBackground = Color(0xFF1C1B1F),
+    onSurface = Color(0xFF1C1B1F),
+    */
+)
+
+@Composable
+fun BreakTheHabitTheme(
+        darkTheme: Boolean = isSystemInDarkTheme(),
+        // Dynamic color is available on Android 12+
+        dynamicColor: Boolean = true,
+        content: @Composable () -> Unit
+) {
+    val colorScheme = when {
+        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+            val context = LocalContext.current
+            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+        }
+
+        darkTheme -> DarkColorScheme
+        else -> LightColorScheme
+    }
+    val view = LocalView.current
+    if (!view.isInEditMode) {
+        SideEffect {
+            val window = (view.context as Activity).window
+            window.statusBarColor = colorScheme.primary.toArgb()
+            WindowCompat.getInsetsController(window, view).isAppearanceLightStatusBars = darkTheme
+        }
+    }
+
+    MaterialTheme(
+            colorScheme = colorScheme,
+            typography = Typography,
+            content = content
+    )
+}

app/src/main/java/com/hyperling/breakthehabit/ui/theme/Type.kt

@@ -0,0 +1,34 @@
+package com.hyperling.breakthehabit.ui.theme
+
+import androidx.compose.material3.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+// Set of Material typography styles to start with
+val Typography = Typography(
+        bodyLarge = TextStyle(
+                fontFamily = FontFamily.Default,
+                fontWeight = FontWeight.Normal,
+                fontSize = 16.sp,
+                lineHeight = 24.sp,
+                letterSpacing = 0.5.sp
+        )
+        /* Other default text styles to override
+    titleLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 22.sp,
+        lineHeight = 28.sp,
+        letterSpacing = 0.sp
+    ),
+    labelSmall = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 11.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.5.sp
+    )
+    */
+)

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

@@ -1,33 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".MainActivity">
-
-    <com.google.android.material.appbar.AppBarLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:theme="@style/Theme.BreakTheHabit.AppBarOverlay">
-
-        <androidx.appcompat.widget.Toolbar
-            android:id="@+id/toolbar"
-            android:layout_width="match_parent"
-            android:layout_height="?attr/actionBarSize"
-            android:background="?attr/colorPrimary"
-            app:popupTheme="@style/Theme.BreakTheHabit.PopupOverlay" />
-
-    </com.google.android.material.appbar.AppBarLayout>
-
-    <include layout="@layout/content_main" />
-
-    <com.google.android.material.floatingactionbutton.FloatingActionButton
-        android:id="@+id/fab"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_gravity="bottom|end"
-        android:layout_margin="@dimen/fab_margin"
-        app:srcCompat="@android:drawable/ic_dialog_email" />
-
-</androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    app:layout_behavior="@string/appbar_scrolling_view_behavior">
-
-    <fragment
-        android:id="@+id/nav_host_fragment"
-        android:name="androidx.navigation.fragment.NavHostFragment"
-        android:layout_width="0dp"
-        android:layout_height="0dp"
-        app:defaultNavHost="true"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintRight_toRightOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        app:navGraph="@navigation/nav_graph" />
-</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".FirstFragment">
-
-    <TextView
-        android:id="@+id/textview_first"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="@string/hello_first_fragment"
-        app:layout_constraintBottom_toTopOf="@id/button_first"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <Button
-        android:id="@+id/button_first"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="@string/next"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/textview_first" />
-</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -1,27 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".SecondFragment">
-
-    <TextView
-        android:id="@+id/textview_second"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        app:layout_constraintBottom_toTopOf="@id/button_second"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <Button
-        android:id="@+id/button_second"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="@string/previous"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/textview_second" />
-</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/menu/menu_main.xml

@@ -1,10 +0,0 @@
-<menu xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    tools:context="com.hyperling.breakthehabit.MainActivity">
-    <item
-        android:id="@+id/action_settings"
-        android:orderInCategory="100"
-        android:title="@string/action_settings"
-        app:showAsAction="never" />
-</menu>

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

@@ -2,4 +2,5 @@
 <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-v26/ic_launcher_round.xml

@@ -2,4 +2,5 @@
 <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/navigation/nav_graph.xml

@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<navigation xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/nav_graph"
-    app:startDestination="@id/FirstFragment">
-
-    <fragment
-        android:id="@+id/FirstFragment"
-        android:name="com.hyperling.breakthehabit.FirstFragment"
-        android:label="@string/first_fragment_label"
-        tools:layout="@layout/fragment_first">
-
-        <action
-            android:id="@+id/action_FirstFragment_to_SecondFragment"
-            app:destination="@id/SecondFragment" />
-    </fragment>
-    <fragment
-        android:id="@+id/SecondFragment"
-        android:name="com.hyperling.breakthehabit.SecondFragment"
-        android:label="@string/second_fragment_label"
-        tools:layout="@layout/fragment_second">
-
-        <action
-            android:id="@+id/action_SecondFragment_to_FirstFragment"
-            app:destination="@id/FirstFragment" />
-    </fragment>
-</navigation>

app/src/main/res/values-night/themes.xml

@@ -1,16 +0,0 @@
-<resources xmlns:tools="http://schemas.android.com/tools">
-    <!-- Base application theme. -->
-    <style name="Theme.BreakTheHabit" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
-        <!-- Primary brand color. -->
-        <item name="colorPrimary">@color/purple_200</item>
-        <item name="colorPrimaryVariant">@color/purple_700</item>
-        <item name="colorOnPrimary">@color/black</item>
-        <!-- Secondary brand color. -->
-        <item name="colorSecondary">@color/teal_200</item>
-        <item name="colorSecondaryVariant">@color/teal_200</item>
-        <item name="colorOnSecondary">@color/black</item>
-        <!-- Status bar color. -->
-        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
-        <!-- Customize your theme here. -->
-    </style>
-</resources>

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

@@ -1,3 +0,0 @@
-<resources>
-    <dimen name="fab_margin">16dp</dimen>
-</resources>

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

@@ -1,12 +1,3 @@
 <resources>
     <string name="app_name">Break The Habit</string>
-    <string name="action_settings">Settings</string>
-    <!-- Strings used for fragments for navigation -->
-    <string name="first_fragment_label">First Fragment</string>
-    <string name="second_fragment_label">Second Fragment</string>
-    <string name="next">Next</string>
-    <string name="previous">Previous</string>
-
-    <string name="hello_first_fragment">Hello first fragment</string>
-    <string name="hello_second_fragment">Hello second fragment. Arg: %1$s</string>
 </resources>

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

@@ -1,25 +1,5 @@
-<resources xmlns:tools="http://schemas.android.com/tools">
-    <!-- Base application theme. -->
-    <style name="Theme.BreakTheHabit" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
-        <!-- Primary brand color. -->
-        <item name="colorPrimary">@color/purple_500</item>
-        <item name="colorPrimaryVariant">@color/purple_700</item>
-        <item name="colorOnPrimary">@color/white</item>
-        <!-- Secondary brand color. -->
-        <item name="colorSecondary">@color/teal_200</item>
-        <item name="colorSecondaryVariant">@color/teal_700</item>
-        <item name="colorOnSecondary">@color/black</item>
-        <!-- Status bar color. -->
-        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
-        <!-- Customize your theme here. -->
-    </style>
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
 
-    <style name="Theme.BreakTheHabit.NoActionBar">
-        <item name="windowActionBar">false</item>
-        <item name="windowNoTitle">true</item>
-    </style>
-
-    <style name="Theme.BreakTheHabit.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
-
-    <style name="Theme.BreakTheHabit.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
+    <style name="Theme.BreakTheHabit" parent="android:Theme.Material.Light.NoActionBar" />
 </resources>

app/src/main/res/xml/backup_rules.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample backup rules file; uncomment and customize as necessary.
+   See https://developer.android.com/guide/topics/data/autobackup
+   for details.
+   Note: This file is ignored for devices older that API 31
+   See https://developer.android.com/about/versions/12/backup-restore
+-->
+<full-backup-content>
+    <!--
+   <include domain="sharedpref" path="."/>
+   <exclude domain="sharedpref" path="device.xml"/>
+-->
+</full-backup-content>

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

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample data extraction rules file; uncomment and customize as necessary.
+   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
+   for details.
+-->
+<data-extraction-rules>
+    <cloud-backup>
+        <!-- TODO: Use <include> and <exclude> to control what is backed up.
+        <include .../>
+        <exclude .../>
+        -->
+    </cloud-backup>
+    <!--
+    <device-transfer>
+        <include .../>
+        <exclude .../>
+    </device-transfer>
+    -->
+</data-extraction-rules>