好的，因此在身份验证成功后（身份验证状态已更改）应触发流构建器导航到主页，但在运行期间，即使身份验证成功后，应用程序仍停留在登录屏幕上 我不确定该怎么办，应该尝试以某种方式使用Navigator.push（）吗？还是有语法错误？实际上对我来说很好，尽管我可能是错的

主要代码

import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import 'package:memoii_book/Screens/feed_screen.dart';
import 'package:memoii_book/Screens/home_screen.dart';
import 'package:memoii_book/Screens/login_Screen.dart';
import 'package:memoii_book/Screens/signup_Screen.dart.';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  void state() {}

  Widget getScreenId() {
    return StreamBuilder<FirebaseUser>(
      stream: FirebaseAuth.instance.onAuthStateChanged,builder: (BuildContext context,snapshot) {
        if (snapshot.hasData) {
          print('y');

          return HomeScreen();
        } else {
          print('yo');

          return loginScreen();
        }
      },);
  }

  // This widget is the root of your application.

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'MemoiiBook',debugShowCheckedmodeBanner: false,home: getScreenId(),routes: {
        loginScreen.id: (context) => loginScreen(),SignupScreen.id: (context) => SignupScreen(),FeedScreen.id: (context) => FeedScreen(),},);
  }
}

用于身份验证的方法

static void login(String email,String password) async
  {
    try{

    await auth.signInWithEmailAndPassword(email: email,password: password);
    final FirebaseUser currentUser = await auth.currentUser();
    if (FirebaseAuth.instance.currentUser() != null) {
      // signed in


    } else {

    }
    }
    catch(e)
    {
      print(e);
    }


  }