Initial walking skeleton implementation

app/.gitignore

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+# Gradle
+.gradle/
+build/
+*/build/
+
+# Local configuration
+local.properties
+
+# Android Studio / IntelliJ
+.idea/
+*.iml
+
+# Generated files
+captures/
+.externalNativeBuild/
+.cxx/
+
+# Kotlin
+*.kotlin_module
+
+# Logs
+*.log
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Keystore files
+*.jks
+*.keystore
+
+# Android profiling
+*.hprof
+
+# Temporary files
+tmp/
+temp/
+
+# APK / Bundle outputs
+*.apk
+*.aab
+
+# Emulator / device files
+*.lock
+
+# Navigation editor temp files
+.navigation/
+
+# Generated folders
+bin/
+out/
+
+# Mac
+.AppleDouble
+.LSOverride
+
+# Windows
+ehthumbs.db
+Desktop.ini
+
+# VSCode
+.vscode/
+
+# JetBrains cache
+.idea/caches/
+.idea/libraries/
+.idea/modules.xml
+.idea/workspace.xml
+.idea/navEditor.xml
+.idea/assetWizardSettings.xml

app/build.gradle.kts

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+plugins {
+    alias(libs.plugins.android.application)
+}
+
+android {
+    namespace = "com.example.workouttimer"
+    compileSdk {
+        version = release(36) {
+            minorApiLevel = 1
+        }
+    }
+
+    defaultConfig {
+        applicationId = "com.example.workouttimer"
+        minSdk = 26
+        targetSdk = 36
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
+    }
+}
+
+dependencies {
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.appcompat)
+    implementation(libs.material)
+    implementation(libs.androidx.activity)
+    implementation(libs.androidx.constraintlayout)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/example/workouttimer/ExampleInstrumentedTest.kt

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+package com.example.workouttimer
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.example.workouttimer", appContext.packageName)
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    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.WorkoutTimer">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/example/workouttimer/MainActivity.kt

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+package com.example.workouttimer
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import com.example.workouttimer.ui.navigation.AppNavigation
+
+class MainActivity : AppCompatActivity() {
+
+    private lateinit var appNavigation: AppNavigation
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        appNavigation = AppNavigation(this)
+        setContentView(appNavigation.createContent())
+    }
+}

app/src/main/java/com/example/workouttimer/data/MockWorkoutRepository.kt

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+package com.example.workouttimer.data
+
+import com.example.workouttimer.domain.Exercise
+import com.example.workouttimer.domain.ExerciseTarget
+import com.example.workouttimer.domain.Workout
+
+class MockWorkoutRepository {
+
+    fun getWorkouts(): List<Workout> {
+        return listOf(
+            Workout(
+                id = 1,
+                name = "Full Body Basic",
+                tags = listOf("Ganzkörper", "Einsteiger"),
+                exercises = listOf(
+                    Exercise(
+                        id = 1,
+                        name = "Push-ups",
+                        target = ExerciseTarget.Repetitions(12),
+                        info = "Saubere Ausführung, kontrollierte Bewegung."
+                    ),
+                    Exercise(
+                        id = 2,
+                        name = "Plank",
+                        target = ExerciseTarget.Duration(30),
+                        info = "Körper gerade halten."
+                    ),
+                    Exercise(
+                        id = 3,
+                        name = "Squats",
+                        target = ExerciseTarget.Repetitions(15),
+                        info = "Knie stabil halten."
+                    )
+                )
+            )
+        )
+    }
+}

app/src/main/java/com/example/workouttimer/domain/Exercise.kt

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+package com.example.workouttimer.domain
+
+data class Exercise(
+    val id: Int,
+    val name: String,
+    val target: ExerciseTarget,
+    val info: String = ""
+)

app/src/main/java/com/example/workouttimer/domain/ExerciseTarget.kt

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+package com.example.workouttimer.domain
+
+sealed class ExerciseTarget {
+
+    data class Repetitions(val reps: Int) : ExerciseTarget()
+
+    data class Duration(val seconds: Int) : ExerciseTarget()
+}

app/src/main/java/com/example/workouttimer/domain/Workout.kt

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+package com.example.workouttimer.domain
+
+data class Workout(
+    val id: Int,
+    val name: String,
+    val exercises: List<Exercise>,
+    val tags: List<String> = emptyList()
+)

app/src/main/java/com/example/workouttimer/domain/WorkoutState.kt

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+package com.example.workouttimer.domain
+
+enum class WorkoutState {
+    READY,
+    RUNNING,
+    PAUSED,
+    FINISHED
+}

app/src/main/java/com/example/workouttimer/ui/navigation/AppNavigation.kt

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+package com.example.workouttimer.ui.navigation
+
+import android.content.Context
+import android.view.View
+import android.widget.FrameLayout
+import com.example.workouttimer.ui.screens.FinishedScreen
+import com.example.workouttimer.ui.screens.HomeScreen
+import com.example.workouttimer.ui.screens.PauseScreen
+import com.example.workouttimer.ui.screens.ReadyToStartScreen
+import com.example.workouttimer.ui.screens.RunningWorkoutScreen
+import com.example.workouttimer.ui.screens.SavedWorkoutsScreen
+import com.example.workouttimer.viewmodel.WorkoutViewModel
+
+class AppNavigation(private val context: Context) {
+
+    private val container = FrameLayout(context)
+    private val viewModel = WorkoutViewModel()
+
+    fun createContent(): FrameLayout {
+        showHome()
+        return container
+    }
+
+    private fun setScreen(view: View) {
+        container.removeAllViews()
+        container.addView(view)
+    }
+
+    fun showHome() {
+        setScreen(
+            HomeScreen(
+                context = context,
+                onShowWorkouts = { showSavedWorkouts() }
+            )
+        )
+    }
+
+    fun showSavedWorkouts() {
+        setScreen(
+            SavedWorkoutsScreen(
+                context = context,
+                workouts = viewModel.workouts,
+                onWorkoutSelected = { workout ->
+                    viewModel.selectWorkout(workout)
+                    showReadyToStart()
+                },
+                onBack = { showHome() }
+            )
+        )
+    }
+
+    fun showReadyToStart() {
+        setScreen(
+            ReadyToStartScreen(
+                context = context,
+                workout = viewModel.currentWorkout,
+                onStart = {
+                    viewModel.startWorkout()
+                    showRunningWorkout()
+                },
+                onBack = { showSavedWorkouts() }
+            )
+        )
+    }
+
+    fun showRunningWorkout() {
+        setScreen(
+            RunningWorkoutScreen(
+                context = context,
+                workout = viewModel.currentWorkout,
+                exercise = viewModel.getCurrentExercise(),
+                exerciseNumber = viewModel.currentExerciseIndex + 1,
+                onNextExercise = {
+                    viewModel.nextExercise()
+
+                    if (viewModel.workoutState.name == "FINISHED") {
+                        showFinished()
+                    } else {
+                        showRunningWorkout()
+                    }
+                },
+                onPause = {
+                    viewModel.pauseWorkout()
+                    showPause()
+                }
+            )
+        )
+    }
+
+    fun showPause() {
+        setScreen(
+            PauseScreen(
+                context = context,
+                onResume = {
+                    viewModel.resumeWorkout()
+                    showRunningWorkout()
+                },
+                onFinish = {
+                    viewModel.finishWorkout()
+                    showFinished()
+                }
+            )
+        )
+    }
+
+    fun showFinished() {
+        setScreen(
+            FinishedScreen(
+                context = context,
+                workout = viewModel.currentWorkout,
+                onBackHome = { showHome() }
+            )
+        )
+    }
+}

app/src/main/java/com/example/workouttimer/ui/screens/ChooseBreak.kt

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+package com.example.workouttimer.ui.screens
+
+class ChooseBreak {
+}

app/src/main/java/com/example/workouttimer/ui/screens/ChooseExercise.kt

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+package com.example.workouttimer.ui.screens
+
+class ChooseExercise {
+}

app/src/main/java/com/example/workouttimer/ui/screens/ChooseReps.kt

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+package com.example.workouttimer.ui.screens
+
+class ChooseReps {
+}

app/src/main/java/com/example/workouttimer/ui/screens/CreateOrModifyScreen.kt

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+package com.example.workouttimer.ui.screens
+
+class CreateOrModifyScreen {
+}

app/src/main/java/com/example/workouttimer/ui/screens/FinishedScreen.kt

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+package com.example.workouttimer.ui.screens
+
+import android.content.Context
+import android.view.Gravity
+import android.widget.Button
+import android.widget.LinearLayout
+import android.widget.TextView
+import com.example.workouttimer.domain.Workout
+
+class FinishedScreen(
+    context: Context,
+    workout: Workout?,
+    onBackHome: () -> Unit
+) : LinearLayout(context) {
+
+    init {
+        orientation = VERTICAL
+        gravity = Gravity.CENTER
+        setPadding(48, 48, 48, 48)
+
+        val title = TextView(context)
+        title.text = "Workout beendet!"
+        title.textSize = 32f
+        title.gravity = Gravity.CENTER
+
+        val workoutText = TextView(context)
+        workoutText.text = workout?.name ?: ""
+        workoutText.textSize = 22f
+        workoutText.gravity = Gravity.CENTER
+
+        val summary = TextView(context)
+        summary.text = "Gute Arbeit. Dein Workout wurde erfolgreich abgeschlossen."
+        summary.textSize = 18f
+        summary.gravity = Gravity.CENTER
+
+        val homeButton = Button(context)
+        homeButton.text = "Zur Startseite"
+        homeButton.setOnClickListener {
+            onBackHome()
+        }
+
+        addView(title)
+        addView(workoutText)
+        addView(summary)
+        addView(homeButton)
+    }
+}

app/src/main/java/com/example/workouttimer/ui/screens/HomeScreen.kt

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+package com.example.workouttimer.ui.screens
+
+import android.content.Context
+import android.view.Gravity
+import android.widget.Button
+import android.widget.LinearLayout
+import android.widget.TextView
+
+class HomeScreen(
+    context: Context,
+    onShowWorkouts: () -> Unit
+) : LinearLayout(context) {
+
+    init {
+        orientation = VERTICAL
+        gravity = Gravity.CENTER
+        setPadding(48, 48, 48, 48)
+
+        val title = TextView(context)
+        title.text = "Workout Timer"
+        title.textSize = 32f
+        title.gravity = Gravity.CENTER
+
+        val subtitle = TextView(context)
+        subtitle.text = "Plane und starte dein Workout"
+        subtitle.textSize = 18f
+        subtitle.gravity = Gravity.CENTER
+
+        val button = Button(context)
+        button.text = "Gespeicherte Workouts"
+        button.setOnClickListener {
+            onShowWorkouts()
+        }
+
+        addView(title)
+        addView(subtitle)
+        addView(button)
+    }
+}

app/src/main/java/com/example/workouttimer/ui/screens/PauseScreen.kt

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+package com.example.workouttimer.ui.screens
+
+import android.content.Context
+import android.view.Gravity
+import android.widget.Button
+import android.widget.LinearLayout
+import android.widget.TextView
+
+class PauseScreen(
+    context: Context,
+    onResume: () -> Unit,
+    onFinish: () -> Unit
+) : LinearLayout(context) {
+
+    init {
+        orientation = VERTICAL
+        gravity = Gravity.CENTER
+        setPadding(48, 48, 48, 48)
+
+        val title = TextView(context)
+        title.text = "Pause"
+        title.textSize = 32f
+        title.gravity = Gravity.CENTER
+
+        val resumeButton = Button(context)
+        resumeButton.text = "Weiter trainieren"
+        resumeButton.setOnClickListener {
+            onResume()
+        }
+
+        val finishButton = Button(context)
+        finishButton.text = "Workout beenden"
+        finishButton.setOnClickListener {
+            onFinish()
+        }
+
+        addView(title)
+        addView(resumeButton)
+        addView(finishButton)
+    }
+}

app/src/main/java/com/example/workouttimer/ui/screens/ReadyToStartScreen.kt

@@ -0,0 +1,59 @@
+package com.example.workouttimer.ui.screens
+
+import android.content.Context
+import android.view.Gravity
+import android.widget.Button
+import android.widget.LinearLayout
+import android.widget.TextView
+import com.example.workouttimer.domain.ExerciseTarget
+import com.example.workouttimer.domain.Workout
+
+class ReadyToStartScreen(
+    context: Context,
+    workout: Workout?,
+    onStart: () -> Unit,
+    onBack: () -> Unit
+) : LinearLayout(context) {
+
+    init {
+        orientation = VERTICAL
+        gravity = Gravity.CENTER_HORIZONTAL
+        setPadding(48, 48, 48, 48)
+
+        val title = TextView(context)
+        title.text = workout?.name ?: "Kein Workout ausgewählt"
+        title.textSize = 28f
+        title.gravity = Gravity.CENTER
+
+        addView(title)
+
+        workout?.exercises?.forEach { exercise ->
+            val exerciseText = TextView(context)
+            exerciseText.text = "${exercise.name} - ${formatTarget(exercise.target)}"
+            exerciseText.textSize = 18f
+            addView(exerciseText)
+        }
+
+        val startButton = Button(context)
+        startButton.text = "Workout starten"
+        startButton.setOnClickListener {
+            onStart()
+        }
+
+        val backButton = Button(context)
+        backButton.text = "Zurück"
+        backButton.setOnClickListener {
+            onBack()
+        }
+
+        addView(startButton)
+        addView(backButton)
+    }
+
+    private fun formatTarget(target: ExerciseTarget): String {
+        return when (target) {
+            is ExerciseTarget.Repetitions -> "${target.reps} Wiederholungen"
+            is ExerciseTarget.Duration -> "${target.seconds} Sekunden"
+        }
+    }
+}

app/src/main/java/com/example/workouttimer/ui/screens/RunningWorkoutScreen.kt

@@ -0,0 +1,72 @@
+package com.example.workouttimer.ui.screens
+
+import android.content.Context
+import android.view.Gravity
+import android.widget.Button
+import android.widget.LinearLayout
+import android.widget.TextView
+import com.example.workouttimer.domain.Exercise
+import com.example.workouttimer.domain.ExerciseTarget
+import com.example.workouttimer.domain.Workout
+
+class RunningWorkoutScreen(
+    context: Context,
+    workout: Workout?,
+    exercise: Exercise?,
+    exerciseNumber: Int,
+    onNextExercise: () -> Unit,
+    onPause: () -> Unit
+) : LinearLayout(context) {
+
+    init {
+        orientation = VERTICAL
+        gravity = Gravity.CENTER
+        setPadding(48, 48, 48, 48)
+
+        val workoutTitle = TextView(context)
+        workoutTitle.text = workout?.name ?: "Workout läuft"
+        workoutTitle.textSize = 22f
+        workoutTitle.gravity = Gravity.CENTER
+
+        val exerciseTitle = TextView(context)
+        exerciseTitle.text = "Übung $exerciseNumber: ${exercise?.name ?: "-"}"
+        exerciseTitle.textSize = 30f
+        exerciseTitle.gravity = Gravity.CENTER
+
+        val targetText = TextView(context)
+        targetText.text = exercise?.target?.let { formatTarget(it) } ?: ""
+        targetText.textSize = 24f
+        targetText.gravity = Gravity.CENTER
+
+        val infoText = TextView(context)
+        infoText.text = exercise?.info ?: ""
+        infoText.textSize = 16f
+        infoText.gravity = Gravity.CENTER
+
+        val nextButton = Button(context)
+        nextButton.text = "Übung geschafft / Weiter"
+        nextButton.setOnClickListener {
+            onNextExercise()
+        }
+
+        val pauseButton = Button(context)
+        pauseButton.text = "Pause"
+        pauseButton.setOnClickListener {
+            onPause()
+        }
+
+        addView(workoutTitle)
+        addView(exerciseTitle)
+        addView(targetText)
+        addView(infoText)
+        addView(nextButton)
+        addView(pauseButton)
+    }
+
+    private fun formatTarget(target: ExerciseTarget): String {
+        return when (target) {
+            is ExerciseTarget.Repetitions -> "${target.reps} Wiederholungen"
+            is ExerciseTarget.Duration -> "${target.seconds} Sekunden"
+        }
+    }
+}

app/src/main/java/com/example/workouttimer/ui/screens/SaveWorkoutScreen.kt

@@ -0,0 +1,4 @@
+package com.example.workouttimer.ui.screens
+
+class SaveWorkoutScreen {
+}

app/src/main/java/com/example/workouttimer/ui/screens/SavedWorkoutsScreen.kt

@@ -0,0 +1,46 @@
+package com.example.workouttimer.ui.screens
+
+import android.content.Context
+import android.view.Gravity
+import android.widget.Button
+import android.widget.LinearLayout
+import android.widget.TextView
+import com.example.workouttimer.domain.Workout
+
+class SavedWorkoutsScreen(
+    context: Context,
+    workouts: List<Workout>,
+    onWorkoutSelected: (Workout) -> Unit,
+    onBack: () -> Unit
+) : LinearLayout(context) {
+
+    init {
+        orientation = VERTICAL
+        gravity = Gravity.CENTER_HORIZONTAL
+        setPadding(48, 48, 48, 48)
+
+        val title = TextView(context)
+        title.text = "Gespeicherte Workouts"
+        title.textSize = 28f
+        title.gravity = Gravity.CENTER
+
+        addView(title)
+
+        workouts.forEach { workout ->
+            val workoutButton = Button(context)
+            workoutButton.text = workout.name
+            workoutButton.setOnClickListener {
+                onWorkoutSelected(workout)
+            }
+            addView(workoutButton)
+        }
+
+        val backButton = Button(context)
+        backButton.text = "Zurück"
+        backButton.setOnClickListener {
+            onBack()
+        }
+
+        addView(backButton)
+    }
+}

app/src/main/java/com/example/workouttimer/viewmodel/WorkoutViewModel.kt

@@ -0,0 +1,62 @@
+package com.example.workouttimer.viewmodel
+
+import com.example.workouttimer.data.MockWorkoutRepository
+import com.example.workouttimer.domain.Exercise
+import com.example.workouttimer.domain.Workout
+import com.example.workouttimer.domain.WorkoutState
+
+class WorkoutViewModel {
+
+    private val repository = MockWorkoutRepository()
+
+    val workouts: List<Workout> = repository.getWorkouts()
+
+    var currentWorkout: Workout? = null
+        private set
+
+    var currentExerciseIndex = 0
+        private set
+
+    var workoutState = WorkoutState.READY
+        private set
+
+    fun selectWorkout(workout: Workout) {
+        currentWorkout = workout
+        currentExerciseIndex = 0
+        workoutState = WorkoutState.READY
+    }
+
+    fun startWorkout() {
+        workoutState = WorkoutState.RUNNING
+    }
+
+    fun pauseWorkout() {
+        workoutState = WorkoutState.PAUSED
+    }
+
+    fun resumeWorkout() {
+        workoutState = WorkoutState.RUNNING
+    }
+
+    fun finishWorkout() {
+        workoutState = WorkoutState.FINISHED
+    }
+
+    fun nextExercise() {
+
+        val workout = currentWorkout ?: return
+
+        if (currentExerciseIndex < workout.exercises.lastIndex) {
+            currentExerciseIndex++
+        } else {
+            finishWorkout()
+        }
+    }
+
+    fun getCurrentExercise(): Exercise? {
+
+        val workout = currentWorkout ?: return null
+
+        return workout.exercises[currentExerciseIndex]
+    }
+}

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

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <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" />
+</vector>

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

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>

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

@@ -0,0 +1,19 @@
+<?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:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Hello World!"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,6 @@
+<?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

@@ -0,0 +1,6 @@
+<?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-night/themes.xml

@@ -0,0 +1,7 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Base.Theme.WorkoutTimer" parent="Theme.Material3.DayNight.NoActionBar">
+        <!-- Customize your dark theme here. -->
+        <!-- <item name="colorPrimary">@color/my_dark_primary</item> -->
+    </style>
+</resources>

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

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>

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

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Workout Timer</string>
+</resources>

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

@@ -0,0 +1,9 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Base.Theme.WorkoutTimer" parent="Theme.Material3.DayNight.NoActionBar">
+        <!-- Customize your light theme here. -->
+        <!-- <item name="colorPrimary">@color/my_light_primary</item> -->
+    </style>
+
+    <style name="Theme.WorkoutTimer" parent="Base.Theme.WorkoutTimer" />
+</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 than 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>

app/src/test/java/com/example/workouttimer/ExampleUnitTest.kt

@@ -0,0 +1,17 @@
+package com.example.workouttimer
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}