Question 137161 in Flutter Question posted in
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Getting error Firebase exception in flutter code about initialisation

Getting Firebase exception in flutter code about initialisation. I have already initialised it in main function. getting error on first line of code where fire store collection initialised.

import ‘package:cloud_firestore/cloud_firestore.dart’;
import ‘package:xuriti/models/core/user_details.dart’;

class UserInfoService{
  CollectionReference userInfoCollection = FirebaseFirestore.instance.collection('userInfo');
UserDetails userDetails =UserDetails();

  addData(UserDetails? userInfo) async {
    await userInfoCollection.doc(userInfo!.user!.sId).set(userInfo.toJson());
    return true;
  }


  Future<UserDetails> getInfo(String? userId)async{
    DocumentSnapshot ds = await userInfoCollection.doc(userId).get();
    if(ds.data() != null){
      return UserDetails.fromJson(ds.data() as Map<String, dynamic>);
    }
    return UserDetails();
  }

}

main.dart with Firebase initialisation:

import 'dart:io';

import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';

import 'package:flutter_screenutil/flutter_screenutil.dart';

import 'package:provider/provider.dart';
import 'package:xuriti/ui/push_notification/notification.dart';
import 'package:xuriti/ui/routes/router.dart';
import 'firebase_options.dart';
import 'logic/view_models/auth_manager.dart';
import 'logic/view_models/company_details_manager.dart';
import 'logic/view_models/password_manager.dart';
import 'logic/view_models/profile_manager.dart';
import 'logic/view_models/reward_manager.dart';
import 'logic/view_models/trans_history_manager.dart';
import 'logic/view_models/transaction_manager.dart';
import 'models/helper/service_locator.dart';
import 'ui/routes/routnames.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter_driver/driver_extension.dart';
import 'package:new_version/new_version.dart';

final GlobalKey<NavigatorState> navigatorKey = new GlobalKey<NavigatorState>();

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  runApp(const MyApp());
 

  Firebase.initializeApp().then((value) {
    FirebaseInitialization.sharedInstance.registerNotification();
    FirebaseInitialization.sharedInstance.configLocalNotification();
  });

  

  Firebase.initializeApp().then((value) async {
    FirebaseInitialization.sharedInstance.registerNotification();
    // FirebaseInitialization.sharedInstance.navigate();
    FirebaseInitialization.sharedInstance.configLocalNotification();
    await FirebaseMessaging.instance.subscribeToTopic('topic1');
    await FirebaseMessaging.instance
        .setForegroundNotificationPresentationOptions(
      alert: true,
      badge: true,
      sound: true,
    );
  });

  

  HttpOverrides.global = MyHttpOverrides();
 
  await setupServiceLocator();

  runApp(const MyApp());
}


class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return ScreenUtilInit(
        designSize: const Size(393, 786),
        minTextAdapt: true,
        splitScreenMode: true,
        builder: (context, child) {
          return MultiProvider(
            providers: [
              ChangeNotifierProvider(create: (context) => getIt<AuthManager>()),
              ChangeNotifierProvider(
                  create: (context) => getIt<CompanyDetailsManager>()),
              ChangeNotifierProvider(
                  create: (context) => getIt<TransactionManager>()),
              ChangeNotifierProvider(
                  create: (context) => getIt<PasswordManager>()),
              ChangeNotifierProvider(
                  create: (context) => getIt<RewardManager>()),
              ChangeNotifierProvider(
                  create: (context) => getIt<ProfileManager>()),
              ChangeNotifierProvider(
                  create: (context) => getIt<TransHistoryManager>()),
            ],
            child: MaterialApp(
                debugShowCheckedModeBanner: false,
                onGenerateRoute: Routers.generateRoute,
                navigatorKey: navigatorKey,
                initialRoute: splash),
          );
        });
  }
}

class MyHttpOverrides extends HttpOverrides {
  @override
  HttpClient createHttpClient(SecurityContext? context) {
    return super.createHttpClient(context)
      ..badCertificateCallback =
          (X509Certificate cert, String host, int port) => true;
  }
}

enter image description here

Tags:

2

Answers


  1. 0

    So try the new way of initialising a firebase app in flutter. Follow this link that also contains an article.
    Link to how to

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  2. 0

    it says that

     No Firebase App '[DEFAULT]' has been created

    this is usually happen when you’re not initialize firebase properly, but you have initialized firebase in your code. instead of initializing like this, try new method of initializing using flutterfire

    • Install the Firebase CLI and log in (run firebase login)

    • From any directory, run this command:

    dart pub global activate flutterfire_cli
    • Then, at the root of your Flutter project directory, run this command:
    flutterfire configure --project=blind-crushes

    This automatically registers your per-platform apps with Firebase and adds a lib/firebase_options.dart configuration file to your Flutter project.

    To initialize Firebase, call Firebase.initializeApp from the firebase_core package with the configuration from your new firebase_options.dart file:

    import 'package:firebase_core/firebase_core.dart';
import 'firebase_options.dart';

// ...

await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
);

    Then, add and begin using the Flutter plugins for the Firebase products you’d like to use.

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