Firebase

Configure Firebase support for Flutter apps.

1. Setup

Install firebase CLI tool

╭─
╰─○ sudo npm install -g firebase-tools

╭─
╰─○ firebase --version
12.4.4

Log in and test the Firebase CLI

╭─
╰─○ firebase login

i  Firebase optionally collects CLI and Emulator Suite usage and error reporting information to help improve our products. Data is collected in accordance with Google's privacy policy (https://policies.google.com/privacy) and is not used to identify you.

? Allow Firebase to collect CLI and Emulator Suite usage and error reporting information? Yes
i  To change your data collection preference at any time, run `firebase logout` and log in again.

Visit this URL on this device to log in:
https://accounts.google.com/o/oauth2/auth?client_id=1234567890-...

Waiting for authentication...

✔  Success! Logged in as ...@gmail.com

flutterfire_cli

╭─
╰─○ dart pub global activate flutterfire_cli

2. Using Flutter Fire CLI

The FlutterFire CLI automates many things that otherwise are manual.

To add Firebase support to a Flutter app, execute at the root of the project:

flutterfire configure

i Found 2 Firebase projects.                                                    
✔ Select a Firebase project to configure your Flutter application with · fir-flutter-codelab-8630e (Firebase-Flutter-Codelab)                                                                
✔ Which platforms should your configuration support (use arrow keys & space to select)? · android, ios, macos, web                                                                           
i Firebase android app com.example.gtk_flutter is not registered on Firebase project fir-flutter-codelab-8630e.                                                                              
i Registered a new Firebase android app on Firebase project fir-flutter-codelab-8630e.                                                                                                       
i Firebase ios app com.example.gtkFlutter is not registered on Firebase project fir-flutter-codelab-8630e.                                                                                   
i Registered a new Firebase ios app on Firebase project fir-flutter-codelab-8630e.                                                                                                           
i Firebase macos app com.example.gtkFlutter registered.                                                                                                                                      
i Firebase web app gtk_flutter (web) is not registered on Firebase project fir-flutter-codelab-8630e.                                                                                        
i Registered a new Firebase web app on Firebase project fir-flutter-codelab-8630e.                                                                                                           
✔ The files android/build.gradle & android/app/build.gradle will be updated to apply Firebase configuration and gradle build plugins. Do you want to continue? · yes                         

Firebase configuration file lib/firebase_options.dart generated successfully with the following Firebase apps:

Platform  Firebase App Id
web       1:1234567890:web:1234567890
android   1:1234567890:android:1234567890
ios       1:1234567890:ios:1234567890
macos     1:1234567890:ios:1234567890

Learn more about using this file and next steps from the documentation:
 > https://firebase.google.com/docs/flutter/setup

Following are the files that the tool automatically creates/updates for us.

1. google-services.json, GoogleService-info.plist files

When creating App IDs for Android and iOS on Firebase console, we need to download the google-services.json and GoogleService-info.plist for Android and iOS respectively. They look like this:

Note that, the Package name for Android and Bundle ID for iOS can be obtained from the following:

2. The files need to be placed at correct directories

3. For Android, two build.gradle files need to be updated.

android/app/build.gradle

android/build.gradle

4. The CLI tool generates lib/firebase_options.dart file.

// 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;
      case TargetPlatform.windows:
        throw UnsupportedError(
          'DefaultFirebaseOptions have not been configured for windows - '
          'you can reconfigure this by running the FlutterFire CLI again.',
        );
      case TargetPlatform.linux:
        throw UnsupportedError(
          'DefaultFirebaseOptions have not been configured for linux - '
          'you can reconfigure this by running the FlutterFire CLI again.',
        );
      default:
        throw UnsupportedError(
          'DefaultFirebaseOptions are not supported for this platform.',
        );
    }
  }

  static const FirebaseOptions web = FirebaseOptions(
    apiKey: 'xxx',
    appId: '1:xxx:web:xxx',
    messagingSenderId: 'xxx',
    projectId: 'fir-flutter-codelab-8630e',
    authDomain: 'fir-flutter-codelab-8630e.firebaseapp.com',
    storageBucket: 'fir-flutter-codelab-8630e.appspot.com',
  );

  static const FirebaseOptions android = FirebaseOptions(
    apiKey: 'xxx-xxx',
    appId: '1:xxx:android:xxx',
    messagingSenderId: 'xxx',
    projectId: 'fir-flutter-codelab-8630e',
    storageBucket: 'fir-flutter-codelab-8630e.appspot.com',
  );

  static const FirebaseOptions ios = FirebaseOptions(
    apiKey: 'xxx',
    appId: '1:xxx:ios:xxx',
    messagingSenderId: 'xxx',
    projectId: 'fir-flutter-codelab-8630e',
    storageBucket: 'fir-flutter-codelab-8630e.appspot.com',
    iosClientId: 'xxx-xxx.apps.googleusercontent.com',
    iosBundleId: 'com.example.gtkFlutter',
  );

  static const FirebaseOptions macos = FirebaseOptions(
    apiKey: 'xxx',
    appId: '1:xxx:ios:xxx',
    messagingSenderId: 'xxx',
    projectId: 'fir-flutter-codelab-8630e',
    storageBucket: 'fir-flutter-codelab-8630e.appspot.com',
    iosClientId: 'xxx-xxx.apps.googleusercontent.com',
    iosBundleId: 'com.example.gtkFlutter',
  );
}