Flutter Supabase Auth：重定向到 Google.com 而不是我的应用程序

按照this教程，在谷歌登录后，我被重定向到Google.com，而不是带我回到我的应用程序.我怎么才能解决这个问题呢？

登录页面的示例代码:

class _LoginScreenState extends State<LoginScreen> {
  final supabase = Supabase.instance.client;
  @override
  void initState() {
    _setupAuthListener();
    super.initState();
  }

  void _setupAuthListener() {
    supabase.auth.onAuthStateChange.listen((data) {
      final event = data.event;
      if (event == AuthChangeEvent.signedIn) {
        Navigator.of(context).pushReplacement(
          MaterialPageRoute(
            builder: (context) => const ProfileScreen(),
          ),
        );
      }
    });
  }

  /// Function to generate a random 16 character string.
  String _generateRandomString() {
    final random = Random.secure();
    return base64Url.encode(List<int>.generate(16, (_) => random.nextInt(256)));
  }

  @override
  Widget build(BuildContext context) {
    return  Center(
        child: ElevatedButton(
          onPressed: () async {
            const appAuth = FlutterAppAuth();

            final rawNonce = _generateRandomString();
            final hashedNonce =
            sha256.convert(utf8.encode(rawNonce)).toString();

            final clientId =
             'MYCLIENTID';

            /// Set as reversed DNS form of Google Client ID + `:/` for Google login
            final redirectUrl = '${clientId.split('.').reversed.join('.')}:/';
            

            const discoveryUrl =
                'https://accounts.google.com/.well-known/openid-configuration';

            // authorize the user by opening the concent page
            final result = await appAuth.authorize(
              AuthorizationRequest(
                clientId,
                redirectUrl,
                discoveryUrl: discoveryUrl,
                nonce: hashedNonce,
                scopes: [
                  'openid',
                  'email',
                  'profile',
                ],
              ),
            );

            if (result == null) {
              throw 'No result';
            }

            // Request the access and id token to google
            final tokenResult = await appAuth.token(
              TokenRequest(
                clientId,
                redirectUrl,
                authorizationCode: result.authorizationCode,
                discoveryUrl: discoveryUrl,
                codeVerifier: result.codeVerifier,
                nonce: result.nonce,
                scopes: [
                  'openid',
                  'email',
                ],
              ),
            );

            final idToken = tokenResult?.idToken;

            if (idToken == null) {
              throw 'No idToken';
            }

            await supabase.auth.signInWithIdToken(
              provider: Provider.google,
              idToken: idToken,
              nonce: rawNonce,
            );
          },
          child: const Text('Google login'),
        ),
      );
  }
}

Build.gradle:

  defaultConfig {
        
        applicationId "com.user.appname"
        minSdkVersion 33
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        manifestPlaceholders += [
                'appAuthRedirectScheme': applicationId
        ]
    }

代码与上面链接的Supabase文档中的代码相同.希望找到解决这个问题的办法.如果您有任何问题，请随时留言