google_apple_sign_in 1.0.0

Sign in with Google and Apple behind one interface. Returns the id token and nonce your backend or Firebase needs, and follows App Store guideline 4.8.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:google_apple_sign_in/google_apple_sign_in.dart';

/// Fill these in (see the README setup section), or run with the fake:
/// `flutter run --dart-define=FAKE=true`.
const config = SocialSignInConfig(
  googleClientId: '', // iOS OAuth client id
  googleServerClientId: '', // Web OAuth client id
  appleSignIn: false, // true once the capability is on
);

void main() {
  const fake = bool.fromEnvironment('FAKE');
  final SocialSignIn signIn = fake ? FakeSocialSignIn() : PlatformSocialSignIn(config);
  runApp(MaterialApp(home: SignInPage(signIn: signIn)));
}

class SignInPage extends StatefulWidget {
  const SignInPage({super.key, required this.signIn});

  final SocialSignIn signIn;

  @override
  State<SignInPage> createState() => _SignInPageState();
}

class _SignInPageState extends State<SignInPage> {
  String _status = 'Signed out';

  Future<void> _go(SocialProvider p) async {
    try {
      final c = await widget.signIn.signIn(p);
      setState(() => _status = 'Signed in with ${p.name} as ${c.email ?? c.displayName ?? 'unknown'}\n'
          'id token: ${c.idToken.substring(0, c.idToken.length.clamp(0, 24))}…');
    } on SocialSignInCancelled {
      setState(() => _status = 'Cancelled');
    } on SocialSignInFailure catch (e) {
      setState(() => _status = 'Failed: ${e.message}');
    }
  }

  @override
  Widget build(BuildContext context) {
    final providers = widget.signIn.providers;
    return Scaffold(
      appBar: AppBar(title: const Text('google_apple_sign_in')),
      body: Padding(
        padding: const EdgeInsets.all(24),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            if (providers.isEmpty) const Text('No provider configured. Fill in SocialSignInConfig in main.dart.'),
            for (final p in providers)
              Padding(
                padding: const EdgeInsets.only(bottom: 12),
                child: FilledButton(
                  onPressed: () => _go(p),
                  child: Text(p == SocialProvider.google ? 'Continue with Google' : 'Sign in with Apple'),
                ),
              ),
            const SizedBox(height: 24),
            Text(_status),
            TextButton(
              onPressed: () async {
                await widget.signIn.signOut();
                setState(() => _status = 'Signed out');
              },
              child: const Text('Sign out'),
            ),
          ],
        ),
      ),
    );
  }
}