Android 以下StackOverflower错误在building _BodyBuilder中被抛出：Firebase.initializeApp（）之后的堆栈溢出

firebase升级后，我可以看到firebase core是强制性的，因此我相应地修改了代码，但不知道initializeApp函数，因此我在互联网上搜索了这一点，并添加了这一行

Wait firebase.initializeApp（）但是现在我得到了这个错误

W/DynamiteModule(20840): Local module descriptor class for providerinstaller not found.
I/DynamiteModule(20840): Considering local module providerinstaller:0 and remote module providerinstaller:0
W/ProviderInstaller(20840): Failed to load providerinstaller module: No acceptable module found. Local version is 0 and remote version is 0.
W/ConnectivityManager.CallbackHandler(20840): callback not found for CALLBACK_AVAILABLE message

════════ Exception caught by widgets library ═══════════════════════════════════════════════════════
The following StackOverflowError was thrown building _BodyBuilder:
Stack Overflow

The relevant error-causing widget was: 
  Scaffold file:///Users/masummolla/FlutterProjects/admin/lib/screens/active_user.dart:32:12
When the exception was thrown, this was the stack: 
#0      _StringBase.== (dart:core-patch/string_patch.dart:280:7)
#1      _LinkedHashMapMixin._getValueOrData (dart:collection-patch/compact_hash.dart:670:10695)
#2      new FirestoreService (package:admin/services/firestore_service.dart:129:7844)
#3      new FirestoreService (package:admin/services/firestore_service.dart:8:27)
#4      new FirestoreService (package:admin/services/firestore_service.dart:8:27)
...
════════════════════════════════════════════════════════════════════════════════════════════════════

════════ Exception caught by widgets library ═══════════════════════════════════════════════════════
The following StackOverflowError was thrown building _BodyBuilder:
Stack Overflow

The relevant error-causing widget was: 
  Scaffold file:///Users/masummolla/FlutterProjects/admin/lib/screens/active_user.dart:32:12
When the exception was thrown, this was the stack: 
#0      _StringBase.== (dart:core-patch/string_patch.dart:280:7)
#1      _LinkedHashMapMixin._getValueOrData (dart:collection-patch/compact_hash.dart:670:10695)
#2      new FirestoreService (package:admin/services/firestore_service.dart:129:7844)
#3      new FirestoreService (package:admin/services/firestore_service.dart:8:27)
#4      new FirestoreService (package:admin/services/firestore_service.dart:8:27)
...
════════════════════════════════════════════════════════════════════════════════════════════════════

我不知道确切的原因

这是我在main.dart文件中的代码

import 'package:admin/models/route_generator.dart';
import 'package:admin/user_preferences.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  await UserPreferences().init();
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  // This widget is the root of your application.
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {

  @override
  Widget build(BuildContext context) {

    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.amber,

        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      // ignore: unrelated_type_equality_checks
      onGenerateRoute: RouteGenerator.generateRoute,
      initialRoute: '/',


    );
  }
}

import 'package:admin/screens/class_videos.dart';
import 'package:admin/screens/important_videos.dart';
import 'package:admin/screens/live_class.dart';
import 'package:admin/screens/user_details.dart';
import 'package:admin/screens/weekly_updates.dart';
import 'package:admin/user_preferences.dart';
import 'package:curved_navigation_bar/curved_navigation_bar.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

class ActiveUser extends StatefulWidget {
  @override
  _ActiveUserState createState() => _ActiveUserState();
}

class _ActiveUserState extends State<ActiveUser> {

  int landing = 2;
  int _page = 2;
  @override
  void initState(){
SystemChrome.setPreferredOrientations([DeviceOrientation.portraitDown,DeviceOrientation.portraitUp]);
    super.initState();
    landing = UserPreferences().landing;
    _page=landing;
  }

  final pageScreen = [ImportantVideos(),WeeklyUpdates(),ClassVideos(),LiveClass(),UserDetails()];
  GlobalKey _bottomNavigationKey = GlobalKey();
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Badshai Trading Videos'),
        actions: [
          IconButton(
            icon: _page==landing ? Icon(Icons.touch_app,color: Colors.white,) :Icon(Icons.pan_tool,color: Colors.white,),
            onPressed: () {
              if (_page!=landing){
                UserPreferences().landing=_page;
                setState(() {
                  landing=_page;
                });
              }else if(_page==landing && _page!=2){
                setState(() {
                  landing = 2;
                  UserPreferences().landing=landing;
                });

              }
            },
          ),
        ],
      ),
      body: pageScreen[_page],
      bottomNavigationBar: CurvedNavigationBar(
        key: _bottomNavigationKey,
        index: _page,
        height: 50.0,
        items: <Widget>[
          Icon(Icons.important_devices, size: 20,color: _page==0 ?Colors.amber:Colors.black,),
          Icon(Icons.multiline_chart, size: 20,color: _page==1 ?Colors.amber:Colors.black,),
          Icon(Icons.live_tv, size: 20,color: _page==2 ?Colors.amber:Colors.black,),
          Icon(Icons.card_membership, size: 20,color: _page==3 ?Colors.amber:Colors.black,),
          Icon(Icons.more, size: 20,color: _page==4 ?Colors.amber:Colors.black,),
        ],
        color: Colors.white,
        buttonBackgroundColor: Colors.white,
        backgroundColor: Colors.amberAccent,
        animationCurve: Curves.easeInOut,
        animationDuration: Duration(milliseconds: 400),
        onTap: (index) {
          setState(() {
            _page = index;
          });
        },
      ),
    );
  }
}

import'包：admin/models/route_generator.dart'；
导入“package:admin/user_preferences.dart”；
导入“包：firebase_core/firebase_core.dart”；
进口“包装：颤振/材料.省道”；
void main（）异步{
WidgetsFlutterBinding.ensureInitialized（）；
等待Firebase.initializeApp（）；
等待UserPreferences（）.init（）；
runApp（MyApp（））；
}
类MyApp扩展了StatefulWidget{
//此小部件是应用程序的根。
@凌驾
_MyAppState createState（）=>\u MyAppState（）；
}
类MyAppState扩展了状态{
@凌驾
小部件构建（构建上下文）{
返回材料PP(
标题：“颤振演示”，
debugShowCheckedModeBanner:false，
主题：主题数据(
主样本：颜色。琥珀色，
视觉密度：视觉密度。自适应平台密度，
),
//忽略：不相关的\u类型\u相等\u检查
onGenerateRoute:RouteGenerator.generateRoute，
initialRoute:“/”，
);
}
}

下面是激活的_user.dart文件的代码

import 'package:admin/models/route_generator.dart';
import 'package:admin/user_preferences.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  await UserPreferences().init();
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  // This widget is the root of your application.
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {

  @override
  Widget build(BuildContext context) {

    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.amber,

        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      // ignore: unrelated_type_equality_checks
      onGenerateRoute: RouteGenerator.generateRoute,
      initialRoute: '/',


    );
  }
}

import 'package:admin/screens/class_videos.dart';
import 'package:admin/screens/important_videos.dart';
import 'package:admin/screens/live_class.dart';
import 'package:admin/screens/user_details.dart';
import 'package:admin/screens/weekly_updates.dart';
import 'package:admin/user_preferences.dart';
import 'package:curved_navigation_bar/curved_navigation_bar.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

class ActiveUser extends StatefulWidget {
  @override
  _ActiveUserState createState() => _ActiveUserState();
}

class _ActiveUserState extends State<ActiveUser> {

  int landing = 2;
  int _page = 2;
  @override
  void initState(){
SystemChrome.setPreferredOrientations([DeviceOrientation.portraitDown,DeviceOrientation.portraitUp]);
    super.initState();
    landing = UserPreferences().landing;
    _page=landing;
  }

  final pageScreen = [ImportantVideos(),WeeklyUpdates(),ClassVideos(),LiveClass(),UserDetails()];
  GlobalKey _bottomNavigationKey = GlobalKey();
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Badshai Trading Videos'),
        actions: [
          IconButton(
            icon: _page==landing ? Icon(Icons.touch_app,color: Colors.white,) :Icon(Icons.pan_tool,color: Colors.white,),
            onPressed: () {
              if (_page!=landing){
                UserPreferences().landing=_page;
                setState(() {
                  landing=_page;
                });
              }else if(_page==landing && _page!=2){
                setState(() {
                  landing = 2;
                  UserPreferences().landing=landing;
                });

              }
            },
          ),
        ],
      ),
      body: pageScreen[_page],
      bottomNavigationBar: CurvedNavigationBar(
        key: _bottomNavigationKey,
        index: _page,
        height: 50.0,
        items: <Widget>[
          Icon(Icons.important_devices, size: 20,color: _page==0 ?Colors.amber:Colors.black,),
          Icon(Icons.multiline_chart, size: 20,color: _page==1 ?Colors.amber:Colors.black,),
          Icon(Icons.live_tv, size: 20,color: _page==2 ?Colors.amber:Colors.black,),
          Icon(Icons.card_membership, size: 20,color: _page==3 ?Colors.amber:Colors.black,),
          Icon(Icons.more, size: 20,color: _page==4 ?Colors.amber:Colors.black,),
        ],
        color: Colors.white,
        buttonBackgroundColor: Colors.white,
        backgroundColor: Colors.amberAccent,
        animationCurve: Curves.easeInOut,
        animationDuration: Duration(milliseconds: 400),
        onTap: (index) {
          setState(() {
            _page = index;
          });
        },
      ),
    );
  }
}

import'包：admin/screens/class_videos.dart'；
导入“package:admin/screens/important_videos.dart”；
导入“包：admin/screens/live_class.dart”；
导入“包：admin/screens/user_details.dart”；
导入“package:admin/screens/weekly_updates.dart”；
导入“package:admin/user_preferences.dart”；
导入“包：弧形导航栏/弧形导航栏.省道”；
进口“包装：颤振/材料.省道”；
导入“包：flifter/services.dart”；
类ActiveUser扩展StatefulWidget{
@凌驾
_ActiveUserState createState（）=>\u ActiveUserState（）；
}
类_ActiveUserState扩展了状态{
int着陆=2；
int_page=2；
@凌驾
void initState（）{
SystemChrome.setPreferredOrientations（[DeviceOrientation.GraphitalDown，DeviceOrientation.GraphitalUp]）；
super.initState（）；
landing=UserPreferences（）。landing；
_页面=登陆；
}
最终页面屏幕=[ImportantVideos（）、WeeklyUpdates（）、ClassVideos（）、LiveClass（）、UserDetails（）]；
GlobalKey _bottomNavigationKey=GlobalKey（）；
@凌驾
小部件构建（构建上下文）{
返回脚手架(
appBar:appBar(
标题：文本（“Badshai交易视频”），
行动：[
图标按钮(
图标：_page==登陆？图标（Icons.touch_应用程序，颜色：Colors.white，）：图标（Icons.pan_工具，颜色：Colors.white，），
已按下：（）{
如果（_page！=着陆）{
UserPreferences（）.landing=\u页面；
设置状态（）{
登陆=_页面；
});
}如果（_page==landing&&u page！=2），则为else{
设置状态（）{
着陆=2；
UserPreferences（）.landing=landing；
});
}
},
),
],
),
正文：页面屏幕[_页面]，
底部导航栏：曲线导航栏(
键：_bottomNavigationKey，
索引：_页，
身高：50.0，
项目：[
图标（Icons.important_设备，大小：20，颜色：_page==0？颜色。琥珀色：颜色。黑色，），
图标（Icons.multiline_图表，大小：20，颜色：页面==1？颜色。琥珀色：颜色。黑色，），
图标（Icons.live\u tv，尺寸：20，颜色：\u页面==2？颜色。琥珀色：颜色。黑色，），
图标（Icons.card_会员资格，尺寸：20，颜色：页面==3？颜色。琥珀色：颜色。黑色，），
图标（Icons.more，大小：20，颜色：_page==4？颜色。琥珀色：颜色。黑色，），
],
颜色：颜色，白色，
按钮背景颜色：Colors.white，
背景颜色：Colors.amberAccent，
动画曲线：Curves.easeInOut，
animationDuration:持续时间（毫秒：400），
onTap：（索引）{
设置状态（）{
_页面=索引；
});
},
),
);
}
}

如果有人能帮我摆脱这一困境，我会感谢他们的
对不起，我得到了FirestoreService使用过的bug\u ndb=FirestoreService（）我的FirestoreService类中的这一行，刚刚对其进行了注释