Beginning FlutterFire

Aug 30 2022 · Dart 2.16, Flutter 3.0, Visual Studio Code 1.69

Part 2: Add Authentication to Your App

05. Add a Sign-In Screen

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Previous episode: 04. Implement Firebase Authentication Next episode: 06. Add a Forgot Password Screen

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OK, we are now ready to start using Firebase in our app.

import 'package:firebase_core/firebase_core.dart'; 
import 'firebase_options.dart'; 

WidgetsFlutterBinding.ensureInitialized(); 

Future<void> main() async { 
  WidgetsFlutterBinding.ensureInitialized(); 
  await Firebase.initializeApp( 
    options: DefaultFirebaseOptions.currentPlatform, 
  ); 
  runApp(const MyApp()); 
} 

import 'package:firebase_auth/firebase_auth.dart'; 

return StreamBuilder<User?>( 
      stream: FirebaseAuth.instance.authStateChanges(), 
      builder: (context, snapshot) { 
        return Container(); 
      }, 

flutter.minSdkVersion=21 

minSdkVersion localProperties.getProperty('flutter.minSdkVersion').toInteger() 

if (!snapshot.hasData) { 
  return SignInScreen(); 
} 

providerConfigs: [ 
  EmailProviderConfiguration(), 
], 

// User is not logged in 
        if (!snapshot.hasData) { 
          return const SignInScreen( 
            providerConfigs: [ 
              EmailProviderConfiguration(), 
            ], 
          ); 
        } 
        return const ActivitiesScreen();