Firebase setup Add Firebase to Flutter for iOS & Android

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Tasks

  1. Create a Firebase Project
  2. Add an iOS app to your project
  3. Add an Android app to your project
  4. Use the keytool to generate an SHA Certificate. See my Flutter Firebase SHA guide if you get stuck at this part.

Also reference the latest Official FlutterFire Setup Docs

How to Get SHA-1 Certificate

Get the SHA1 certificate from the Android app.

command line
cd android
./gradlew signingReport

Copy the SHA-1 value and paste it into the Firebase Android App config.

Default Firebase App

Paste this boilerplate into your main.dart file:

file_type_flutter main.dart
import 'package:flutter/material.dart';

// Import the firebase_core plugin
import 'package:firebase_core/firebase_core.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  runApp(App());
}

/// We are using a StatefulWidget such that we only create the [Future] once,
/// no matter how many times our widget rebuild.
/// If we used a [StatelessWidget], in the event where [App] is rebuilt, that
/// would re-initialize FlutterFire and make our application re-enter loading state,
/// which is undesired.
class App extends StatefulWidget {
  // Create the initialization Future outside of `build`:
  @override
  _AppState createState() => _AppState();
}

class _AppState extends State<App> {
  /// The future is part of the state of our widget. We should not call `initializeApp`
  /// directly inside [build].
  final Future<FirebaseApp> _initialization = Firebase.initializeApp();

  @override
  Widget build(BuildContext context) {
    return FutureBuilder(
      // Initialize FlutterFire:
      future: _initialization,
      builder: (context, snapshot) {
        // Check for errors
        if (snapshot.hasError) {
          return Text('error');
        }

        // Once complete, show your application
        if (snapshot.connectionState == ConnectionState.done) {
          return MaterialApp();
        }

        // Otherwise, show something whilst waiting for initialization to complete
        return Text('loading');
      },
    );
  }
}

Bonus Video

Looking for a more advanced setup guide? Checkout my FlutterFire Setup for Power Users guide for additional tools like Analytics and Crash Reporting.

Q&A Chat