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marinacoelhothatfiredev
marinacoelho
and
thatfiredev
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Create Android Friendly Meals (#97)
* Project structure * Add first screen, navigation, injection and app icons * Add recipe and image generation features to the main screen * Add Markdown support, add loading indicator, change cuisine field for notes field * Update vertex-ai-friendly-meals/android/app/src/main/java/com/google/firebase/example/friendlymeals/data/datasource/AIRemoteDataSource.kt Co-authored-by: Rosário P. Fernandes <[email protected]> * Update logic to show loading icon --------- Co-authored-by: Rosário P. Fernandes <[email protected]>
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‎vertex-ai-friendly-meals/android/.gitignore

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*.iml
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*.apk
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*.aar
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*.zip
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.gradle
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/local.properties
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/.idea
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.DS_Store
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/build
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/captures
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.externalNativeBuild
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.cxx
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.vscode
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.project
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.settings
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.classpath
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google-services.json
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.idea/
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.idea/*
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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 {
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alias(libs.plugins.android.application)
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alias(libs.plugins.kotlin.android)
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alias(libs.plugins.kotlin.compose)
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alias(libs.plugins.google.services)
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alias(libs.plugins.google.ksp)
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alias(libs.plugins.google.hilt)
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alias(libs.plugins.kotlin.serialization)
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}
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android {
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namespace = "com.google.firebase.example.friendlymeals"
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compileSdk = 35
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defaultConfig {
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applicationId = "com.google.firebase.example.friendlymeals"
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minSdk = 26
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targetSdk = 35
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versionCode = 1
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versionName = "1.0"
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testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
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}
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buildTypes {
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release {
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isMinifyEnabled = false
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proguardFiles(
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getDefaultProguardFile("proguard-android-optimize.txt"),
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"proguard-rules.pro"
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)
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}
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}
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compileOptions {
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sourceCompatibility = JavaVersion.VERSION_11
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targetCompatibility = JavaVersion.VERSION_11
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}
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kotlinOptions {
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jvmTarget = "11"
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}
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buildFeatures {
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compose = true
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}
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}
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dependencies {
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implementation(libs.androidx.core.ktx)
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implementation(libs.androidx.lifecycle.runtime.ktx)
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implementation(libs.androidx.activity.compose)
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implementation(platform(libs.androidx.compose.bom))
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implementation(libs.androidx.ui)
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implementation(libs.androidx.ui.graphics)
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implementation(libs.androidx.ui.tooling.preview)
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implementation(libs.androidx.material3)
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implementation(libs.androidx.navigation.compose)
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implementation(libs.androidx.hilt.navigation.compose)
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implementation(libs.androidx.core.splashscreen)
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implementation(libs.androidx.constraintlayout.compose)
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implementation(libs.kotlinx.serialization.json)
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implementation(libs.hilt.android)
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ksp(libs.hilt.android.compiler)
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implementation(platform(libs.firebase.bom))
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implementation(libs.firebase.vertexai)
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//Library to handle Markdown in Compose
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implementation(libs.richtext.commonmark)
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testImplementation(libs.junit)
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androidTestImplementation(libs.androidx.junit)
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androidTestImplementation(libs.androidx.espresso.core)
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androidTestImplementation(platform(libs.androidx.compose.bom))
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androidTestImplementation(libs.androidx.ui.test.junit4)
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debugImplementation(libs.androidx.ui.tooling)
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debugImplementation(libs.androidx.ui.test.manifest)
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}

‎vertex-ai-friendly-meals/android/app/proguard-rules.pro

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# Add project specific ProGuard rules here.
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# You can control the set of applied configuration files using the
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# proguardFiles setting in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}
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# Uncomment this to preserve the line number information for
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# debugging stack traces.
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#-keepattributes SourceFile,LineNumberTable
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# If you keep the line number information, uncomment this to
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# hide the original source file name.
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#-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
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import androidx.test.platform.app.InstrumentationRegistry
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import androidx.test.ext.junit.runners.AndroidJUnit4
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import org.junit.Test
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import org.junit.runner.RunWith
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import org.junit.Assert.*
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/**
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* Instrumented test, which will execute on an Android device.
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*
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* See [testing documentation](http://d.android.com/tools/testing).
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*/
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@RunWith(AndroidJUnit4::class)
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class ExampleInstrumentedTest {
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@Test
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fun useAppContext() {
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// Context of the app under test.
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val appContext = InstrumentationRegistry.getInstrumentation().targetContext
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assertEquals("com.google.firebase.example.friendlymeals", appContext.packageName)
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}
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}

‎vertex-ai-friendly-meals/android/app/src/main/AndroidManifest.xml

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools">
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<application
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android:allowBackup="true"
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android:dataExtractionRules="@xml/data_extraction_rules"
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android:fullBackupContent="@xml/backup_rules"
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android:icon="@mipmap/ic_launcher"
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android:label="@string/app_name"
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android:roundIcon="@mipmap/ic_launcher_round"
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android:supportsRtl="true"
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android:theme="@style/Theme.FriendlyMeals"
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tools:targetApi="31"
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android:name = ".data.injection.FriendlyMealsHiltApp"
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android:windowSoftInputMode="adjustResize">
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<activity
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android:name=".MainActivity"
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android:exported="true"
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android:theme="@style/Theme.FriendlyMeals">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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</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
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import android.os.Bundle
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import android.view.WindowManager
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import androidx.activity.ComponentActivity
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import androidx.activity.compose.setContent
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import androidx.activity.enableEdgeToEdge
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import androidx.compose.foundation.layout.fillMaxSize
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import androidx.compose.foundation.layout.padding
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import androidx.compose.material3.MaterialTheme
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import androidx.compose.material3.Scaffold
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import androidx.compose.material3.SnackbarHost
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import androidx.compose.material3.SnackbarHostState
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import androidx.compose.material3.Surface
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import androidx.compose.runtime.remember
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import androidx.compose.ui.Modifier
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import androidx.navigation.compose.NavHost
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import androidx.navigation.compose.composable
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import androidx.navigation.compose.rememberNavController
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import com.google.firebase.example.friendlymeals.ui.home.HomeRoute
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import com.google.firebase.example.friendlymeals.ui.home.HomeScreen
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import com.google.firebase.example.friendlymeals.ui.theme.FriendlyMealsTheme
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import dagger.hilt.android.AndroidEntryPoint
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@AndroidEntryPoint
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class MainActivity : ComponentActivity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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enableEdgeToEdge()
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setSoftInputMode()
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setContent {
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val snackbarHostState = remember { SnackbarHostState() }
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val navController = rememberNavController()
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FriendlyMealsTheme {
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Surface(
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modifier = Modifier.fillMaxSize(),
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color = MaterialTheme.colorScheme.background,
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) {
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Scaffold(
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modifier = Modifier.fillMaxSize(),
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snackbarHost = { SnackbarHost(hostState = snackbarHostState) }
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) { innerPadding ->
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NavHost(
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navController = navController,
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startDestination = HomeRoute,
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modifier = Modifier.padding(innerPadding)
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) {
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composable<HomeRoute> { HomeScreen() }
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}
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}
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}
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}
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}
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}
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private fun setSoftInputMode() {
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window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING)
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}
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}

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

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

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

‎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
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import android.app.Application
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import dagger.hilt.android.HiltAndroidApp
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@HiltAndroidApp
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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
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import android.graphics.Bitmap
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data class Recipe(
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val title: String = "",
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val description: String = "",
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val ingredients: List<String> = listOf(),
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val steps: List<String> = listOf(),
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val image: Bitmap? = null
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)

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

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