Create Android Friendly Meals

vertex-ai-friendly-meals/android/.gitignore

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+*.iml
+*.apk
+*.aar
+*.zip
+.gradle
+/local.properties
+/.idea
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+.vscode
+.project
+.settings
+.classpath
+google-services.json
+.idea/
+.idea/*
+local.properties

vertex-ai-friendly-meals/android/app/.gitignore

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+/build

vertex-ai-friendly-meals/android/app/build.gradle.kts

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+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.kotlin.android)
+    alias(libs.plugins.kotlin.compose)
+    alias(libs.plugins.google.services)
+    alias(libs.plugins.google.ksp)
+    alias(libs.plugins.google.hilt)
+    alias(libs.plugins.kotlin.serialization)
+}
+
+android {
+    namespace = "com.google.firebase.example.friendlymeals"
+    compileSdk = 35
+
+    defaultConfig {
+        applicationId = "com.google.firebase.example.friendlymeals"
+        minSdk = 26
+        targetSdk = 35
+        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
+    }
+    kotlinOptions {
+        jvmTarget = "11"
+    }
+    buildFeatures {
+        compose = true
+    }
+}
+
+dependencies {
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.activity.compose)
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.ui)
+    implementation(libs.androidx.ui.graphics)
+    implementation(libs.androidx.ui.tooling.preview)
+    implementation(libs.androidx.material3)
+    implementation(libs.androidx.navigation.compose)
+    implementation(libs.androidx.hilt.navigation.compose)
+    implementation(libs.androidx.core.splashscreen)
+    implementation(libs.androidx.constraintlayout.compose)
+    implementation(libs.kotlinx.serialization.json)
+    implementation(libs.hilt.android)
+    ksp(libs.hilt.android.compiler)
+
+    implementation(platform(libs.firebase.bom))
+    implementation(libs.firebase.vertexai)
+
+    //Library to handle Markdown in Compose
+    implementation(libs.richtext.commonmark)
+
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+    androidTestImplementation(platform(libs.androidx.compose.bom))
+    androidTestImplementation(libs.androidx.ui.test.junit4)
+    debugImplementation(libs.androidx.ui.tooling)
+    debugImplementation(libs.androidx.ui.test.manifest)
+}

vertex-ai-friendly-meals/android/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

vertex-ai-friendly-meals/android/app/src/androidTest/java/com/google/firebase/example/friendlymeals/ExampleInstrumentedTest.kt

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+package com.google.firebase.example.friendlymeals
+
+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.google.firebase.example.friendlymeals", appContext.packageName)
+    }
+}

vertex-ai-friendly-meals/android/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.FriendlyMeals"
+        tools:targetApi="31"
+        android:name = ".data.injection.FriendlyMealsHiltApp"
+        android:windowSoftInputMode="adjustResize">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:theme="@style/Theme.FriendlyMeals">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

vertex-ai-friendly-meals/android/app/src/main/java/com/google/firebase/example/friendlymeals/MainActivity.kt

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+package com.google.firebase.example.friendlymeals
+
+import android.os.Bundle
+import android.view.WindowManager
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.SnackbarHost
+import androidx.compose.material3.SnackbarHostState
+import androidx.compose.material3.Surface
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.composable
+import androidx.navigation.compose.rememberNavController
+import com.google.firebase.example.friendlymeals.ui.home.HomeRoute
+import com.google.firebase.example.friendlymeals.ui.home.HomeScreen
+import com.google.firebase.example.friendlymeals.ui.theme.FriendlyMealsTheme
+import dagger.hilt.android.AndroidEntryPoint
+
+@AndroidEntryPoint
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setSoftInputMode()
+
+        setContent {
+            val snackbarHostState = remember { SnackbarHostState() }
+            val navController = rememberNavController()
+
+            FriendlyMealsTheme {
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background,
+                ) {
+                    Scaffold(
+                        modifier = Modifier.fillMaxSize(),
+                        snackbarHost = { SnackbarHost(hostState = snackbarHostState) }
+                    ) { innerPadding ->
+                        NavHost(
+                            navController = navController,
+                            startDestination = HomeRoute,
+                            modifier = Modifier.padding(innerPadding)
+                        ) {
+                            composable<HomeRoute> { HomeScreen() }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private fun setSoftInputMode() {
+        window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING)
+    }
+}

vertex-ai-friendly-meals/android/app/src/main/java/com/google/firebase/example/friendlymeals/MainViewModel.kt

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+package com.google.firebase.example.friendlymeals
+
+import android.util.Log
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.CoroutineExceptionHandler
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.launch
+
+open class MainViewModel : ViewModel() {
+    fun launchCatching(block: suspend CoroutineScope.() -> Unit) =
+        viewModelScope.launch(
+            CoroutineExceptionHandler { _, throwable ->
+                Log.e("MainViewModel", throwable.message ?: "Unknown error")
+            },
+            block = block
+        )
+}

vertex-ai-friendly-meals/android/app/src/main/java/com/google/firebase/example/friendlymeals/data/datasource/AIRemoteDataSource.kt

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+package com.google.firebase.example.friendlymeals.data.datasource
+
+import android.graphics.Bitmap
+import com.google.firebase.vertexai.GenerativeModel
+import com.google.firebase.vertexai.ImagenModel
+import com.google.firebase.vertexai.type.PublicPreviewAPI
+import javax.inject.Inject
+
+@OptIn(PublicPreviewAPI::class)
+class AIRemoteDataSource @Inject constructor(
+    private val generativeModel: GenerativeModel,
+    private val imagenModel: ImagenModel,
+) {
+    suspend fun generateRecipe(ingredients: String, notes: String): String {
+        var prompt = "Based on this ingredients list: $ingredients, please give me one recipe."
+        if (notes.isNotBlank()) {
+          prompt += "Please take in consideration these notes: $notes."
+        }
+        val response = generativeModel.generateContent(prompt)
+        return response.text.orEmpty()
+    }
+
+    @OptIn(PublicPreviewAPI::class)
+    suspend fun generateRecipeImage(recipe: String): Bitmap {
+        val imageResponse = imagenModel.generateImages(recipe)
+        return imageResponse.images.first().asBitmap()
+    }
+}

vertex-ai-friendly-meals/android/app/src/main/java/com/google/firebase/example/friendlymeals/data/injection/FirebaseHiltModule.kt

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+package com.google.firebase.example.friendlymeals.data.injection
+
+import com.google.firebase.Firebase
+import com.google.firebase.vertexai.GenerativeModel
+import com.google.firebase.vertexai.ImagenModel
+import com.google.firebase.vertexai.type.ImagenAspectRatio
+import com.google.firebase.vertexai.type.ImagenImageFormat
+import com.google.firebase.vertexai.type.ImagenPersonFilterLevel
+import com.google.firebase.vertexai.type.ImagenSafetyFilterLevel
+import com.google.firebase.vertexai.type.ImagenSafetySettings
+import com.google.firebase.vertexai.type.PublicPreviewAPI
+import com.google.firebase.vertexai.type.imagenGenerationConfig
+import com.google.firebase.vertexai.vertexAI
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+
+@Module
+@InstallIn(SingletonComponent::class)
+object FirebaseHiltModule {
+    @Provides fun generativeModel(): GenerativeModel {
+        return Firebase.vertexAI.generativeModel(
+            modelName = "gemini-2.0-flash"
+        )
+    }
+
+    @OptIn(PublicPreviewAPI::class)
+    @Provides fun imagenModel(): ImagenModel {
+        val generationConfig = imagenGenerationConfig {
+            numberOfImages = 1
+            aspectRatio = ImagenAspectRatio.SQUARE_1x1
+            imageFormat = ImagenImageFormat.png()
+        }
+
+        val safetySettings = ImagenSafetySettings(
+            safetyFilterLevel = ImagenSafetyFilterLevel.BLOCK_LOW_AND_ABOVE,
+            personFilterLevel = ImagenPersonFilterLevel.BLOCK_ALL
+        )
+        return Firebase.vertexAI.imagenModel(
+            modelName = "imagen-3.0-generate-002",
+            generationConfig = generationConfig,
+            safetySettings = safetySettings
+        )
+    }
+}

vertex-ai-friendly-meals/android/app/src/main/java/com/google/firebase/example/friendlymeals/data/injection/FriendlyMealsHiltApp.kt

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+package com.google.firebase.example.friendlymeals.data.injection
+
+import android.app.Application
+import dagger.hilt.android.HiltAndroidApp
+
+@HiltAndroidApp
+class FriendlyMealsHiltApp: Application()

vertex-ai-friendly-meals/android/app/src/main/java/com/google/firebase/example/friendlymeals/data/model/Recipe.kt

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+package com.google.firebase.example.friendlymeals.data.model
+
+import android.graphics.Bitmap
+
+data class Recipe(
+    val title: String = "",
+    val description: String = "",
+    val ingredients: List<String> = listOf(),
+    val steps: List<String> = listOf(),
+    val image: Bitmap? = null
+)

vertex-ai-friendly-meals/android/app/src/main/java/com/google/firebase/example/friendlymeals/data/repository/AIRepository.kt

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+package com.google.firebase.example.friendlymeals.data.repository
+
+import android.graphics.Bitmap
+import com.google.firebase.example.friendlymeals.data.datasource.AIRemoteDataSource
+import javax.inject.Inject
+
+class AIRepository @Inject constructor(
+    private val aiRemoteDataSource: AIRemoteDataSource
+) {
+    suspend fun generateRecipe(ingredients: String, notes: String): String {
+        return aiRemoteDataSource.generateRecipe(ingredients, notes)
+    }
+
+    suspend fun generateRecipeImage(recipe: String): Bitmap {
+        return aiRemoteDataSource.generateRecipeImage(recipe)
+    }
+}