即使应用程序'；s所有入口点都已初始化其firebase_核心

正如标题所示，我以前遇到并解决了这个问题，直到我在我的应用程序中实现了一个新功能，我才再遇到这个问题。我不明白是什么原因导致抛出异常，欢迎提供任何评论/答案

New function=如果数据库没有数据，则显示一个alertdialog供用户输入全名，以便我知道哪个登录属于谁，并将名称传递到数据库中，以便他们可以直接登录，应用程序将从数据库中读取。（使用SharedReferences和Firebase存储用户数据）

下面是我的代码：

主飞镖

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  SharedPreferences prefs = await SharedPreferences.getInstance();
  var storeddisplayName = prefs.getString('displayName');
  var storedgooglename = prefs.getString('googlename');
  var storedemail = prefs.getString('email');
  var storedimage = prefs.getString('imageUrlGoogle');
  var storedid = prefs.getString('id');
  print(
      'name : $storeddisplayName,google name : $storedgooglename ,email : $storedemail,image : $storedimage,id : $storedid');
  runApp(MaterialApp(
      home: storedid == null ? App() : InitializedFireMyApp(),
      debugShowCheckedModeBanner: false));
}
class App extends StatefulWidget {
  _AppState createState() => _AppState();
}

class _AppState extends State<App> {
  // Set default `_initialized` and `_error` state to false
  bool _initialized = false;
  bool _error = false;

  // Define an async function to initialize FlutterFire
  void initializeFlutterFire() async {
    try {
      // Wait for Firebase to initialize and set `_initialized` state to true
      await Firebase.initializeApp();
      setState(() {
        _initialized = true;
      });
    } catch (e) {
      // Set `_error` state to true if Firebase initialization fails
      setState(() {
        _error = true;
      });
    }
  }

  @override
  void initState() {
    initializeFlutterFire();
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(home: LoginPage(), debugShowCheckedModeBanner: false);
  }
}

class InitializedFireMyApp extends StatefulWidget {
  @override
  _InitializedFireMyAppState createState() => _InitializedFireMyAppState();
}

class _InitializedFireMyAppState extends State<InitializedFireMyApp> {
  // Set default `_initialized` and `_error` state to false
  bool _initialized = false;
  bool _error = false;

  // Define an async function to initialize FlutterFire
  void initializeFlutterFire() async {
    try {
      // Wait for Firebase to initialize and set `_initialized` state to true
      await Firebase.initializeApp();
      setState(() {
        _initialized = true;
      });
    } catch (e) {
      // Set `_error` state to true if Firebase initialization fails
      setState(() {
        _error = true;
      });
    }
  }
  

  @override
  void initState() {
    initializeFlutterFire();
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(home: MyApp(), debugShowCheckedModeBanner: false);
  }
}

很抱歉，我好像在这里扔了很多东西，但我真的不知道是什么导致了这个问题

如果您需要更多信息，请告诉我

class SignInButton extends StatefulWidget {
  @override
  _SignInButtonState createState() => _SignInButtonState();
}

class _SignInButtonState extends State<SignInButton> {
  @override
  Widget build(BuildContext context) {
    return OutlineButton(
      highlightedBorderColor: Colors.white,
      splashColor: Colors.grey,
      onPressed: () async {
        signInWithGoogle().then((_) async {
          SharedPreferences prefs2 = await SharedPreferences.getInstance();
          prefs2.setString('googlename', name);
          prefs2.setString('email', email);
          prefs2.setString('imageUrlGoogle', imageUrlGoogle);
          prefs2.setString('id', id);
          Navigator.of(context).push(
            MaterialPageRoute(
              builder: (context) {
                return MyApp();
              },
            ),
          );
        });
      },
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(40)),
      highlightElevation: 0,
      borderSide: BorderSide(color: Colors.grey),
      child: Padding(
        padding: const EdgeInsets.fromLTRB(0, 7, 0, 7),
        child: Row(
          mainAxisSize: MainAxisSize.min,
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Padding(
              padding: const EdgeInsets.only(left: 0),
              child: Center(
                child: Image(
                  image: AssetImage('images/google_logo.png'),
                  height: 40,
                ),
              ),
            )
          ],
        ),
      ),
    );
  }
}

class LoginPage extends StatefulWidget {
  @override
  _LoginPageState createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        debugShowCheckedModeBanner: false,
        home: Scaffold(
          backgroundColor: Colors.black,
          body: Container(
            color: Colors.grey[850],
            child: Center(
              child: Column(
                mainAxisSize: MainAxisSize.max,
                mainAxisAlignment: MainAxisAlignment.center,
                children: <Widget>[
                  Image.asset('images/logo.png'),
                  Text('CYC Conference App',
                      textAlign: TextAlign.center,
                      style: TextStyle(
                          color: Colors.white,
                          fontFamily: 'Spartan',
                          fontWeight: FontWeight.bold,
                          fontSize: 30)),
                  SizedBox(height: 50),
                  Text('Sign in with Google',
                      textAlign: TextAlign.center,
                      style: TextStyle(
                          color: Colors.white54,
                          fontFamily: 'Spartan',
                          fontWeight: FontWeight.bold,
                          fontSize: 20)),
                  SizedBox(
                    height: 10,
                  ),
                  SignInButton(),
                ],
              ),
            ),
          ),
        ));
  }
}

@override //MyApp()'s initState
  void initState() {
    // TODO: implement initState
    super.initState();
    testConnectionLogin(context);
  }
testConnectionLogin(context) async {
  try {
    final result = await InternetAddress.lookup('example.com');
    if (result.isNotEmpty && result[0].rawAddress.isNotEmpty) {
      SharedPreferences prefs = await SharedPreferences.getInstance();
      print('IT IS CONNECTED BOYS');
      setDisplayName(BuildContext context) async {
        SharedPreferences prefs = await SharedPreferences.getInstance();
        final GlobalKey<FormState> _nameFormKey = GlobalKey<FormState>();
        showDialog(
            barrierDismissible: false,
            context: context,
            builder: (context) {
              return WillPopScope(
                  onWillPop: () async => false,
                  child: AlertDialog(
                    title: Text('Full name :'),
                    content: Form(
                      key: _nameFormKey,
                      child: TextFormField(
                        controller: displayNameController,
                        validator: (value) {
                          if (value.isEmpty) {
                            // name is empty, don't validate
                            return 'Please set your full name';
                          } else if (value.split(' ').length < 2) {
                            // name contains only 1 word, don't validate
                            return 'Only 1 word, please set your full name';
                          } else if (value.length < 5) {
                            // name is too short, don't validate
                            return 'Name too short, please set your full name';
                          }
                          // validate
                          return null;
                        },
                      ),
                    ),
                    actions: <Widget>[
                      new FlatButton(
                        child: Text('CONFIRM'),
                        onPressed: () {
                          if (_nameFormKey.currentState.validate()) {
                            prefs.setString(
                                'displayName', displayNameController.text);
                            Navigator.of(context).pop();
                            displayNameController.clear();
                            print('validated');
                            submitUserDisplayName();
                          }
                        },
                      )
                    ],
                  ));
            });
      }

      print('HERE');
      String _gName = prefs.getString('googlename').toString();
      String _dName = prefs.getString('displayName').toString();
      String _docTitle = _gName + ' - '+_dName;
      await dbref
          .collection("userData")
          .doc(_docTitle)
          .get()
          .then((data) async {
        if (!((prefs.getString('googlename') == data.get('GoogleName')) &&
            prefs.getString('displayName') == data.get('displayName'))) {
          setDisplayName(context);
        }
      });
    }
  } on SocketException catch (_) {
    Scaffold.of(context).showSnackBar(snackBar3);
    print('Sign in not complete, no internet Connection');
  }
}

void submitUserDisplayName() async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
  await dbref
      .collection('userData')
      .doc(prefs.getString('googlename') +
          ' - ' +
          prefs.getString('displayName'))
      .set({
    'GoogleName': prefs.getString('displayName'),
    'DisplayName': prefs.getString('displayName'),
    'UID': prefs.getString('id'),
    'imagelink': prefs.getString('imageUrlGoogle'),
  });
}

E/flutter (19121): #38     Element.updateChild 
package:flutter/…/widgets/framework.dart:3266
E/flutter (19121): #39     ComponentElement.performRebuild 
package:flutter/…/widgets/framework.dart:4589
E/flutter (19121): #40     Element.rebuild 
package:flutter/…/widgets/framework.dart:4280
E/flutter (19121): #41     ComponentElement._firstBuild 
package:flutter/…/widgets/framework.dart:4543
E/flutter (19121): #42     ComponentElement.mount 
package:flutter/…/widgets/framework.dart:4538
E/flutter (19121): #43     Element.inflateWidget 
package:flutter/…/widgets/framework.dart:3508
E/flutter (19121): #44     Element.updateChild 
package:flutter/…/widgets/framework.dart:3266
E/flutter (19121): #45     ComponentElement.performRebuild 
package:flutter/…/widgets/framework.dart:4589
E/flutter (19121): #46     StatefulElement.performRebuild (pac