如何解决5.0.0 迁移后，使用提供程序的多提供程序失败？

我尝试迁移到 provider: ^5.0.0 并停止工作，对之前工作的内容进行采样。

  @override
  Widget build(BuildContext context) {
    WidgetsFlutterBinding.ensureInitialized();
    return MultiProvider(
      providers: [
        ChangeNotifierProvider<ConfigurationProvider>(create: (context) => ConfigurationProvider(preferences: widget.preloadedFs)),ChangeNotifierProvider<ManagerProvider>(create: (context) => ManagerProvider()),],child: Builder(builder: (context) {
        ConfigurationProvider config = Provider.of<ConfigurationProvider>(context);
        ThemeData customTheme;
        ThemeData darkTheme;

        darkTheme = config.blackThemeEnabled ? AppTheme.black(config.accentColor) : AppTheme.dark(config.accentColor);
        customTheme = config.darkThemeEnabled ? darkTheme : AppTheme.white(config.accentColor);
        List<Locale> supportedLocales = [];
        supportedLanguages.forEach((element) => supportedLocales.add(Locale(element.languageCode,'''')));

        return MaterialApp(
          locale: _locale,supportedLocales: supportedLocales,localizationsDelegates: [
            FallbackLocalizationDelegate(),AppLocalizationsDelegate(),GlobalMaterialLocalizations.delegate,GlobalWidgetsLocalizations.delegate,GlobalCupertinoLocalizations.delegate,localeResolutionCallback: (locale,supportedLocales) {
            for (var supportedLocale in supportedLocales) {
              if (supportedLocale?.languageCode == locale?.languageCode && supportedLocale?.countryCode == locale?.countryCode) {
                return supportedLocale;
              }
            }
            return supportedLocales?.first;
          },builder: (context,child) {
            return ScrollConfiguration(
              behavior: CustomScrollBehavior(),child: child,);
          },);
      }),);
  }

错误日志

======== Exception caught by widgets library =======================================================
The following ArgumentError was thrown building Builder(dirty,dependencies: [_InheritedProviderScope<ConfigurationProvider>]):
Invalid argument(s) (value): Must not be null

The relevant error-causing widget was: 
  Builder file:///home/sony/Flutter-sdk/Flutter-app/demo-Flutter/lib/main.dart:109:14
When the exception was thrown,this was the stack: 
#0      ArgumentError.checkNotNull (dart:core/errors.dart:185:27)
#1      SharedPreferences._setValue (package:shared_preferences/shared_preferences.dart:146:19)
#2      SharedPreferences.setString (package:shared_preferences/shared_preferences.dart:132:7)
#3      LegacyPreferences.saveAudioDownloadpath (package:demo/internal/legacyPreferences.dart:127:11)
#4      ConfigurationProvider.audioDownloadpath= (package:demo/provider/configurationProvider.dart:165:17)
...
====================================================================================================

======== Exception caught by widgets library =======================================================
The following StateError was thrown building Builder(dirty,dependencies: [_InheritedProviderScope<ConfigurationProvider>]):
Bad state: Tried to read a provider that threw during the creation of its value.
The exception occurred during the creation of type ConfigurationProvider.

The relevant error-causing widget was: 
  Builder file:///home/sony/Flutter-sdk/Flutter-app/demo-Flutter/lib/main.dart:109:14
When the exception was thrown,this was the stack: 
#0      _CreateInheritedProviderState.value (package:provider/src/inherited_provider.dart:661:7)
#1      _InheritedProviderScopeElement.value (package:provider/src/inherited_provider.dart:544:33)
#2      Provider.of (package:provider/src/provider.dart:289:29)
#3      _MainState.build.<anonymous closure> (package:demo/main.dart:110:49)
#4      Builder.build (package:Flutter/src/widgets/basic.dart:7798:48)
...
====================================================================================================

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。

小编邮箱:dio#foxmail.com (将#修改为@）

export class Item3Service {

  constructor(
    @inject(LOCALE_ID) private locale: string) {}

}

@NgModule({
  providers: [
    { provide: LOCALE_ID,useFactory: () => window.navigator.language}
  ]
})

import { Component,OnInit } from '@angular/core';
import { Router } from '@angular/router';
import { MyServiceService } from '../my-service.service';

@Component({
  selector: 'app-routed',templateUrl: './routed.component.html',styleUrls: ['./routed.component.scss']
})
export class RoutedComponent implements OnInit {

  constructor(private route: Router,private myService: MyServiceService) { }

  ngOnInit(): void {
    this.myService.setUrl(this.route.url)
  }

}

import { Injectable } from '@angular/core';
import { ReplaySubject,Observable } from 'rxjs';
import { share,switchMap } from 'rxjs/operators';

@Injectable({
  providedIn: 'root'
})
export class MyServiceService {
  private _url$: ReplaySubject<string> = new ReplaySubject<string>(1);

  private _mydata$: Observable<string>;
  get myData$() { return this._mydata$.pipe(share()); }


  constructor() {
    this._mydata$ = this._url$.pipe(
      switchMap(url => {
        const parsedUrl = this.parseUrl(url);
        return this.callBackend(parsedUrl)
      })
    )
  }

  setUrl(url: string) {
    this._url$.next(url);
  }

  private callBackend(parsedUrl): Observable<string> {
    // call backend 
  }

  private parseUrl(url: string): number[] {
    // parse ids
  }
}

export class ItemService {
  constructor(private http: HttpClient) {}

  getList(item1Id: string,item2Id: string) {
    /* Call to Get List endpoint with Item1Id and Item2Id */
  }

  getDetails(item1: string,item2: string,item3: string) {
    /* Call to Get Details endpoint with Item1Id and Item2Id and Item3Id */
  }
}

export class ItemResolver implements Resolve<any> {
  constructor(private itemService: ItemService) {}

  resolve(
    route: ActivatedRouteSnapshot,state: RouterStateSnapshot
  ): Observable<any> {
    return this.itemService.getList(route.params['item1Id'],route.params['item2Id']);
  }
}

export class HelloComponent  {

  constructor(private route: ActivatedRoute,private itemService: ItemService) {}

  getDetails(item3Id) {
    this.route.params.pipe(
      take(1),map(({ item1Id,item2Id }) => {
        console.log(this.itemService.getDetails(item1Id,item2Id,item3Id))
      })
    ).subscribe();
  }
}

export function handleError(errorResp: Response | any): Observable<string> {
    ....
    // here I would like to display the message
    return Observable.throw(errMsg);
}