feat(android,core): allow initializing default Firebase apps via `Fir…

…ebaseOptions.fromResource` on Android (#8566)

packages/firebase_core/firebase_core/android/src/main/java/io/flutter/plugins/firebase/core/FlutterFirebaseCorePlugin.java

@@ -73,39 +73,43 @@ public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {
     applicationContext = null;
   }
 
-  private Task<Map<String, Object>> firebaseAppToMap(FirebaseApp firebaseApp) {
-    return Tasks.call(
-        cachedThreadPool,
-        () -> {
-          Map<String, Object> appMap = new HashMap<>();
-          Map<String, String> optionsMap = new HashMap<>();
-          FirebaseOptions options = firebaseApp.getOptions();
+  private Map<String, String> firebaseOptionsToMap(FirebaseOptions options) {
+    Map<String, String> optionsMap = new HashMap<>();
 
-          optionsMap.put(KEY_API_KEY, options.getApiKey());
-          optionsMap.put(KEY_APP_ID, options.getApplicationId());
+    optionsMap.put(KEY_API_KEY, options.getApiKey());
+    optionsMap.put(KEY_APP_ID, options.getApplicationId());
 
-          if (options.getGcmSenderId() != null) {
-            optionsMap.put(KEY_MESSAGING_SENDER_ID, options.getGcmSenderId());
-          }
+    if (options.getGcmSenderId() != null) {
+      optionsMap.put(KEY_MESSAGING_SENDER_ID, options.getGcmSenderId());
+    }
 
-          if (options.getProjectId() != null) {
-            optionsMap.put(KEY_PROJECT_ID, options.getProjectId());
-          }
+    if (options.getProjectId() != null) {
+      optionsMap.put(KEY_PROJECT_ID, options.getProjectId());
+    }
 
-          if (options.getDatabaseUrl() != null) {
-            optionsMap.put(KEY_DATABASE_URL, options.getDatabaseUrl());
-          }
+    if (options.getDatabaseUrl() != null) {
+      optionsMap.put(KEY_DATABASE_URL, options.getDatabaseUrl());
+    }
 
-          if (options.getStorageBucket() != null) {
-            optionsMap.put(KEY_STORAGE_BUCKET, options.getStorageBucket());
-          }
+    if (options.getStorageBucket() != null) {
+      optionsMap.put(KEY_STORAGE_BUCKET, options.getStorageBucket());
+    }
 
-          if (options.getGaTrackingId() != null) {
-            optionsMap.put(KEY_TRACKING_ID, options.getGaTrackingId());
-          }
+    if (options.getGaTrackingId() != null) {
+      optionsMap.put(KEY_TRACKING_ID, options.getGaTrackingId());
+    }
+
+    return optionsMap;
+  }
+
+  private Task<Map<String, Object>> firebaseAppToMap(FirebaseApp firebaseApp) {
+    return Tasks.call(
+        cachedThreadPool,
+        () -> {
+          Map<String, Object> appMap = new HashMap<>();
 
           appMap.put(KEY_NAME, firebaseApp.getName());
-          appMap.put(KEY_OPTIONS, optionsMap);
+          appMap.put(KEY_OPTIONS, firebaseOptionsToMap(firebaseApp.getOptions()));
 
           appMap.put(
               KEY_IS_AUTOMATIC_DATA_COLLECTION_ENABLED,
@@ -173,6 +177,16 @@ private Task<List<Map<String, Object>>> initializeCore() {
         });
   }
 
+  private Task<Map<String, String>> firebaseOptionsFromResource() {
+    return Tasks.call(
+        cachedThreadPool,
+        () -> {
+          final FirebaseOptions options = FirebaseOptions.fromResource(applicationContext);
+          if (options == null) return null;
+          return firebaseOptionsToMap(options);
+        });
+  }
+
   private Task<Void> setAutomaticDataCollectionEnabled(Map<String, Object> arguments) {
     return Tasks.call(
         cachedThreadPool,
@@ -224,6 +238,9 @@ public void onMethodCall(MethodCall call, @NonNull final MethodChannel.Result re
       case "Firebase#initializeCore":
         methodCallTask = initializeCore();
         break;
+      case "Firebase#optionsFromResource":
+        methodCallTask = firebaseOptionsFromResource();
+        break;
       case "FirebaseApp#setAutomaticDataCollectionEnabled":
         methodCallTask = setAutomaticDataCollectionEnabled(call.arguments());
         break;

packages/firebase_core/firebase_core/example/android/app/build.gradle

@@ -1,61 +1,55 @@
 def localProperties = new Properties()
 def localPropertiesFile = rootProject.file('local.properties')
 if (localPropertiesFile.exists()) {
-    localPropertiesFile.withReader('UTF-8') { reader ->
-        localProperties.load(reader)
-    }
+  localPropertiesFile.withReader('UTF-8') { reader ->
+    localProperties.load(reader)
+  }
 }
 
 def flutterRoot = localProperties.getProperty('flutter.sdk')
 if (flutterRoot == null) {
-    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
+  throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
 }
 
 def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
 if (flutterVersionCode == null) {
-    flutterVersionCode = '1'
+  flutterVersionCode = '1'
 }
 
 def flutterVersionName = localProperties.getProperty('flutter.versionName')
 if (flutterVersionName == null) {
-    flutterVersionName = '1.0'
+  flutterVersionName = '1.0'
 }
 
 apply plugin: 'com.android.application'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 29
-
-    lintOptions {
-        disable 'InvalidPackage'
-    }
-
-    defaultConfig {
-        applicationId "io.flutter.plugins.firebasecoreexample"
-        minSdkVersion 21
-        targetSdkVersion 28
-        versionCode flutterVersionCode.toInteger()
-        versionName flutterVersionName
-        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
-    }
-
-    buildTypes {
-        release {
-            // TODO: Add your own signing config for the release build.
-            // Signing with the debug keys for now, so `flutter run --release` works.
-            signingConfig signingConfigs.debug
-        }
+  compileSdkVersion flutter.compileSdkVersion
+
+  compileOptions {
+    sourceCompatibility JavaVersion.VERSION_1_8
+    targetCompatibility JavaVersion.VERSION_1_8
+  }
+
+  defaultConfig {
+    applicationId "io.flutter.plugins.firebasecoreexample"
+    minSdkVersion flutter.minSdkVersion
+    targetSdkVersion flutter.targetSdkVersion
+    versionCode flutterVersionCode.toInteger()
+    versionName flutterVersionName
+  }
+
+  buildTypes {
+    release {
+      signingConfig signingConfigs.debug
     }
+  }
 }
 
 flutter {
-    source '../..'
+  source '../..'
 }
 
 dependencies {
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test:runner:1.2.0'
-    androidTestImplementation 'androidx.test:rules:1.2.0'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
 }

packages/firebase_core/firebase_core/example/android/app/src/main/AndroidManifest.xml

@@ -6,6 +6,7 @@
         <activity
             android:name="io.flutter.embedding.android.FlutterActivity"
             android:launchMode="singleTop"
+            android:exported="true"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"

packages/firebase_core/firebase_core/example/android/app/src/main/res/values/values.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="default_web_client_id" translatable="false">406099696497-a12gakvts4epfk5pkio7dphc1anjiggc.apps.googleusercontent.com</string>
+    <string name="firebase_database_url" translatable="false">https://flutterfire-e2e-tests-default-rtdb.europe-west1.firebasedatabase.app</string>
+    <string name="gcm_defaultSenderId" translatable="false">406099696497</string>
+    <string name="google_api_key" translatable="false">AIzaSyCdRjCVZlhrq72RuEklEyyxYlBRCYhI2Sw</string>
+    <string name="google_app_id" translatable="false">1:406099696497:android:0d4ed619c031c0ac3574d0</string>
+    <string name="google_crash_reporting_api_key" translatable="false">AIzaSyCdRjCVZlhrq72RuEklEyyxYlBRCYhI2Sw</string>
+    <string name="google_storage_bucket" translatable="false">flutterfire-e2e-tests.appspot.com</string>
+    <string name="project_id" translatable="false">flutterfire-e2e-tests</string>
+</resources>

packages/firebase_core/firebase_core/example/android/build.gradle

@@ -6,7 +6,6 @@ buildscript {
 
     dependencies {
         classpath 'com.android.tools.build:gradle:4.1.2'
-        classpath 'com.google.gms:google-services:4.3.4'
     }
 }
 

packages/firebase_core/firebase_core/example/android/gradle.properties

@@ -1,7 +1,3 @@
 org.gradle.jvmargs=-Xmx1536M
-android.enableR8=true
 android.useAndroidX=true
 android.enableJetifier=true
-org.gradle.daemon=true
-org.gradle.caching=true
-org.gradle.parallel=true

packages/firebase_core/firebase_core/example/android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip

packages/firebase_core/firebase_core/example/android/settings.gradle

@@ -1,15 +1,11 @@
 include ':app'
 
-def flutterProjectRoot = rootProject.projectDir.parentFile.toPath()
+def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
+def properties = new Properties()
 
-def plugins = new Properties()
-def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins')
-if (pluginsFile.exists()) {
-    pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) }
-}
+assert localPropertiesFile.exists()
+localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
 
-plugins.each { name, path ->
-    def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile()
-    include ":$name"
-    project(":$name").projectDir = pluginDirectory
-}
+def flutterSdkPath = properties.getProperty("flutter.sdk")
+assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"

packages/firebase_core/firebase_core/example/lib/firebase_options.dart

@@ -0,0 +1,87 @@
+// File generated by FlutterFire CLI.
+// ignore_for_file: lines_longer_than_80_chars, avoid_classes_with_only_static_members
+import 'package:firebase_core/firebase_core.dart' show FirebaseOptions;
+import 'package:flutter/foundation.dart'
+    show defaultTargetPlatform, kIsWeb, TargetPlatform;
+
+/// Default [FirebaseOptions] for use with your Firebase apps.
+///
+/// Example:
+/// ```dart
+/// import 'firebase_options.dart';
+/// // ...
+/// await Firebase.initializeApp(
+///   options: DefaultFirebaseOptions.currentPlatform,
+/// );
+/// ```
+class DefaultFirebaseOptions {
+  static FirebaseOptions get currentPlatform {
+    if (kIsWeb) {
+      return web;
+    }
+    switch (defaultTargetPlatform) {
+      case TargetPlatform.android:
+        return android;
+      case TargetPlatform.iOS:
+        return ios;
+      case TargetPlatform.macOS:
+        return macos;
+      default:
+        throw UnsupportedError(
+          'DefaultFirebaseOptions are not supported for this platform.',
+        );
+    }
+  }
+
+  static const FirebaseOptions web = FirebaseOptions(
+    apiKey: 'AIzaSyB7wZb2tO1-Fs6GbDADUSTs2Qs3w08Hovw',
+    appId: '1:406099696497:web:87e25e51afe982cd3574d0',
+    messagingSenderId: '406099696497',
+    projectId: 'flutterfire-e2e-tests',
+    authDomain: 'flutterfire-e2e-tests.firebaseapp.com',
+    databaseURL:
+        'https://flutterfire-e2e-tests-default-rtdb.europe-west1.firebasedatabase.app',
+    storageBucket: 'flutterfire-e2e-tests.appspot.com',
+    measurementId: 'G-JN95N1JV2E',
+  );
+
+  static const FirebaseOptions android = FirebaseOptions(
+    apiKey: 'AIzaSyCdRjCVZlhrq72RuEklEyyxYlBRCYhI2Sw',
+    appId: '1:406099696497:android:0d4ed619c031c0ac3574d0',
+    messagingSenderId: '406099696497',
+    projectId: 'flutterfire-e2e-tests',
+    databaseURL:
+        'https://flutterfire-e2e-tests-default-rtdb.europe-west1.firebasedatabase.app',
+    storageBucket: 'flutterfire-e2e-tests.appspot.com',
+  );
+
+  static const FirebaseOptions ios = FirebaseOptions(
+    apiKey: 'AIzaSyDooSUGSf63Ghq02_iIhtnmwMDs4HlWS6c',
+    appId: '1:406099696497:ios:acd9c8e17b5e620e3574d0',
+    messagingSenderId: '406099696497',
+    projectId: 'flutterfire-e2e-tests',
+    databaseURL:
+        'https://flutterfire-e2e-tests-default-rtdb.europe-west1.firebasedatabase.app',
+    storageBucket: 'flutterfire-e2e-tests.appspot.com',
+    androidClientId:
+        '406099696497-tvtvuiqogct1gs1s6lh114jeps7hpjm5.apps.googleusercontent.com',
+    iosClientId:
+        '406099696497-taeapvle10rf355ljcvq5dt134mkghmp.apps.googleusercontent.com',
+    iosBundleId: 'io.flutter.plugins.firebase.tests',
+  );
+
+  static const FirebaseOptions macos = FirebaseOptions(
+    apiKey: 'AIzaSyDooSUGSf63Ghq02_iIhtnmwMDs4HlWS6c',
+    appId: '1:406099696497:ios:acd9c8e17b5e620e3574d0',
+    messagingSenderId: '406099696497',
+    projectId: 'flutterfire-e2e-tests',
+    databaseURL:
+        'https://flutterfire-e2e-tests-default-rtdb.europe-west1.firebasedatabase.app',
+    storageBucket: 'flutterfire-e2e-tests.appspot.com',
+    androidClientId:
+        '406099696497-tvtvuiqogct1gs1s6lh114jeps7hpjm5.apps.googleusercontent.com',
+    iosClientId:
+        '406099696497-taeapvle10rf355ljcvq5dt134mkghmp.apps.googleusercontent.com',
+    iosBundleId: 'io.flutter.plugins.firebase.tests',
+  );
+}