Initial commit

app/build.gradle.kts

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+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+}
+
+android {
+    namespace = "com.example.lemonade"
+    compileSdk = 33
+
+    defaultConfig {
+        applicationId = "com.example.lemonade"
+        minSdk = 24
+        targetSdk = 33
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        vectorDrawables {
+            useSupportLibrary = true
+        }
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+    buildFeatures {
+        compose = true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion = "1.4.3"
+    }
+    packaging {
+        resources {
+            excludes += "/META-INF/{AL2.0,LGPL2.1}"
+        }
+    }
+}
+
+dependencies {
+
+    implementation("androidx.core:core-ktx:1.9.0")
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.6.1")
+    implementation("androidx.activity:activity-compose:1.7.2")
+    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")
+    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")
+    debugImplementation("androidx.compose.ui:ui-tooling")
+    debugImplementation("androidx.compose.ui:ui-test-manifest")
+}

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/lemonade/ExampleInstrumentedTest.kt

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+package com.example.lemonade
+
+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.lemonade", 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.Lemonade"
+        tools:targetApi="31">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.Lemonade">
+            <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/lemonade/MainActivity.kt

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+package com.example.lemonade
+
+import android.content.Context
+import android.os.Bundle
+import android.widget.Toast
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.border
+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.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.wrapContentSize
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+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.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.example.lemonade.ui.theme.LemonadeTheme
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            LemonadeTheme {
+                // A surface container using the 'background' color from the theme
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background
+                ) {
+                    LemonadeApp()
+                }
+            }
+        }
+    }
+}
+
+
+@Preview(showBackground = true)
+@Composable
+fun LemonadeApp() {
+    Column {
+        Box(
+            modifier = Modifier
+                .background(Color.Yellow)
+                .fillMaxWidth(),
+            contentAlignment = Alignment.Center
+        ) {
+            Text(
+                modifier = Modifier.padding(16.dp),
+                text = "Lemonade",
+                fontSize = 20.sp,
+                fontWeight = FontWeight.Bold
+            )
+        }
+        LemonadeImageAndLabel(
+            modifier = Modifier
+                .fillMaxSize()
+                .wrapContentSize(Alignment.Center)
+                .weight(0.8f)
+        )
+        Spacer(modifier = Modifier.weight(0.2f))
+    }
+
+}
+
+@Composable
+fun LemonadeImageAndLabel(
+    modifier: Modifier = Modifier
+) {
+    // Should be used within Composable function. Required for a toast.
+    val context = LocalContext.current
+
+    /* Current step the app is displaying
+
+    When the step variable gets updated to a new value, Compose triggers recomposition of the
+    LemonadeImageAndLabel composable, which means that the composable will execute again. The step value
+    is remembered across recompositions. */
+    var step by remember {
+        mutableStateOf(1)
+    }
+
+    var squeezeCount = (2..4).random()
+
+    var imageResource = when (step) {
+        1 -> R.drawable.lemon_tree
+        2 -> R.drawable.lemon_squeeze
+        3 -> R.drawable.lemon_drink
+        else -> R.drawable.lemon_restart
+    }
+
+    var accessibilityResource = when (step) {
+        1 -> R.string.lemon_tree_desc
+        2 -> R.string.lemon_squeeze_desc
+        3 -> R.string.lemon_drink_desc
+        else -> R.string.lemon_restart_desc
+    }
+
+    var labelResource = when (step) {
+        1 -> R.string.lemon_tree
+        2 -> R.string.lemon_squeeze
+        3 -> R.string.lemon_drink
+        else -> R.string.lemon_restart
+    }
+
+    Column(modifier = modifier, horizontalAlignment = Alignment.CenterHorizontally) {
+        Image(
+            painter = painterResource(id = imageResource),
+            contentDescription = stringResource(id = accessibilityResource),
+            modifier = Modifier
+                .clip(RoundedCornerShape(28.dp))
+                .clickable {
+                    when {
+                        step == 2 && squeezeCount != 1 -> {
+                            showToast(context, "${--squeezeCount} clicks left")
+                        }
+
+                        step != 4 -> step++
+                        else -> {
+                            step = 1
+                            squeezeCount = (2..4).random()
+                        }
+                    }
+                }
+                .size(200.dp)
+                .border(width = 2.dp, color = Color(0xFF69cdd8), shape = RoundedCornerShape(28.dp))
+                .background(Color(0xFFC3ECD2))
+                .padding(24.dp)
+        )
+        Text(
+            text = stringResource(id = labelResource),
+            modifier = Modifier.padding(top = 16.dp),
+            fontSize = 18.sp
+        )
+    }
+}
+
+fun showToast(context: Context, text: String) {
+    Toast.makeText(context, text, Toast.LENGTH_SHORT).show()
+}

app/src/main/java/com/example/lemonade/ui/theme/Color.kt

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+package com.example.lemonade.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/example/lemonade/ui/theme/Theme.kt

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+package com.example.lemonade.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 LemonadeTheme(
+    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
+    )
+}