I have just implement the firebase authentication in my flutter app but when I run the app it doesn’t start. I don’t know what’s the issue can someone guide me where can I change the code. In my app I’ve implemented wrapper file where I check the state of user.
Main.dart
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
import 'package:stream/wrapper.dart';
void main() async {
await Firebase.initializeApp();
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
title: 'Firebase Auth',
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue),
useMaterial3: true,
),
home: Wrapper(),
);
}
}
wrapper.dart
import 'package:flutter/material.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:stream/home.dart';
import 'package:stream/login.dart';
class Wrapper extends StatefulWidget {
const Wrapper({super.key});
@override
State<Wrapper> createState() => _WrapperState();
}
class _WrapperState extends State<Wrapper> {
@override
Widget build(BuildContext context) {
return Scaffold(
body: StreamBuilder(
stream: FirebaseAuth.instance.authStateChanges(),
builder: (context, snapshot) {
if (snapshot.hasData) {
return Home();
} else {
return Login();
}
},
),
);
}
}
I just want to start my authentication with firebase.
>Solution :
You should initialize Flutter bindings in your void main() function like this:
void main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp(
options: const FirebaseOptions(
apiKey: "Your apikey",
appId: "Your appId",
messagingSenderId: "Your messagingSenderId",
projectId: "Your projectId",
),
);
runApp(const MyApp());
}
Explanation:
WidgetsFlutterBinding.ensureInitialized(); is used to ensure that the necessary bindings for the Flutter framework are initialized before any other operation takes place. This is particularly important when you’re trying to perform certain operations, such as accessing platform-specific services like storage or network calls, that require the Flutter framework to be fully set up.
For example, if you’re trying to initialize something like Firebase or any other plugin that requires platform-specific initialization, you would often call WidgetsFlutterBinding.ensureInitialized(); at the beginning of your app’s main() function or before initializing those plugins. This ensures that the necessary Flutter bindings are set up before any platform-specific code is executed.