Flutter Firebase [firebase_auth/network-request-failed] 发生网络错误（例如超时、连接中断或无法访问主机）

Question

我正在使用 firebase auth 实现 Google 登录，并将相应的用户信息存储在 Cloud Firestore 和共享首选项中。在我的手机上运行该应用程序并点击登录/注册按钮时，会出现带有可用帐户的弹出窗口。但是当我选择所需的Google帐户时，弹出窗口消失并出现错误，如下：

[firebase_auth/network-request-failed] 发生网络错误（例如超时、连接中断或主机无法访问）。

此外，Cloud Firestore 控制台和 Firebase Auth 的“用户”部分中都不会存储任何帐户和用户详细信息。但详细信息存储在共享首选项中，并且当我重新运行应用程序时能够直接导航到主页。我的代码是：

class Login extends StatefulWidget {
  static final String id = 'login_screen';
  const Login({Key? key}) : super(key: key);

  @override
  State<Login> createState() => _LoginState();
}

class _LoginState extends State<Login> {
  final GoogleSignIn googleSignIn = new GoogleSignIn();
  final FirebaseAuth firebaseAuth = FirebaseAuth.instance;
  late SharedPreferences preferences;
  bool loading = false;
  bool isLoggedIn = false;
  User? user;
  @override
  void initState() {
    super.initState();
    isSignedIn();
  }

  void isSignedIn() async {
    setState(() {
      // loading = true;
    });
    preferences = await SharedPreferences.getInstance();
    isLoggedIn = await googleSignIn.isSignedIn(); //Check if user is signed in

    if (isLoggedIn) {
      Navigator.pushReplacement(
          context,
          MaterialPageRoute(
              builder: (context) =>
                  HomePage())); //Helps us to keep user logged in once he has logged in so that user doesn't come to log in screen again on pressing back.
      setState(() {
        loading = false;
      });
    }
  }

  Future signInWithGoogle() async {
    preferences = await SharedPreferences.getInstance();
    setState(() {
      loading = true;
    });
    GoogleSignInAccount? googleUser = await googleSignIn.signIn();

    if (googleUser != null) {
     final GoogleSignInAuthentication googleSignInAuthentication =
          await googleUser.authentication;

      final AuthCredential credential = GoogleAuthProvider.credential(
        accessToken: googleSignInAuthentication.accessToken,
        idToken: googleSignInAuthentication.idToken,
      );
      final UserCredential userCredential =
          await firebaseAuth.signInWithCredential(credential);
      user = userCredential.user;
      if (user != null) {
        final QuerySnapshot result = await FirebaseFirestore.instance
            .collection("users")
            .where("id", isEqualTo: user?.uid)
            .get();
        //Check whether the id of that field is equal to the id of the user we obtained above.
        //If we have it, it means the user is already signed up to the application.
        final List<DocumentSnapshot> docs = result.docs;
        if (docs.length ==
            0) //If the docs are empty means that user does not exist in our database, therfore sign hom up
        {
          //Add user to our collection
          FirebaseFirestore.instance.collection("users").doc(user?.uid).set({
            "id": user?.uid,
            "username": user?.displayName,
            "profilePicture": user?.photoURL,
            "phNo": user?.phoneNumber,
            "email": user?.email,
          });
          await preferences.setString('id', user!.uid);
          await preferences.setString('userName', user!.displayName ?? ' ');
          await preferences.setString('photoUrl', user!.photoURL ?? ' ');
          await preferences.setString('email', user!.email ?? '');
        } else {
          await preferences.setString('id', docs[0]['id']);
          await preferences.setString('userName', docs[0]['username']);
          await preferences.setString('photoUrl', docs[0]['photoUrl']);
          await preferences.setString('email', docs[0]['email']);
        }
        Navigator.popAndPushNamed(context, HomePage.id);
        setState(() {
          loading = false;
        });

      } else {}

      
    }
  }

 

Answer 1

这可能是由于您的互联网连接造成的

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\xe2\x98\x91\xef\xb8\x8f 确保您的手机或模拟器可以访问互联网

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\xe2\x98\x91\xef\xb8\x8f 另外请确保您已在文件中添加了ACCESS_INTERNET应用程序的权限AndroidManifest.xml

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