I'm creating login authentication, login has been successful but to enter the dashboard it doesn't go directly to the redirect but has to restart the android emulator, below is the code I made

import 'package:flutter/material.dart';
import 'package:get/get_core/get_core.dart';
import 'package:get/get_instance/src/extension_instance.dart';
import 'package:surveys/presentation/home/authServices.dart';
import 'package:firebase_auth/firebase_auth.dart';
    
class LoginScreen extends StatefulWidget {
  const LoginScreen({ Key? key }) : super(key: key);

  @override
  _LoginScreenState createState() => _LoginScreenState();
}
    
class _LoginScreenState extends State<LoginScreen> {
        
    final emailC = TextEditingController();
    final passwordC = TextEditingController();
        
    void login(String email, String password) async {
      FirebaseAuth _auth =  FirebaseAuth.instance;
      User? user;
      try {
        UserCredential userCredential = await _auth.signInWithEmailAndPassword(
          email: email,
          password: password);
        user = userCredential.user;
      } on FirebaseAuthException catch (e) {
        if (e.code == 'user-not-found') {
          print('No user found for that email.');
        } else if (e.code == 'wrong-password') {
          print('Wrong password provided for that user.');
        }
      }
    }

here I call login

onPressed: () {
  //login(context);
  login(emailC.text, passwordC.text);
                                      
},

CodePudding user response：

I don't see any Navigator to Dashboard Screen

In your case:

try {
  UserCredential userCredential = await _auth.signInWithEmailAndPassword(
    email: email,
    password: password);
    user = userCredential.user;
    if(user != null){
    setState(() {
      _success = true;
      user = user.email;
    });
    }
    else{_success = false;}

} on FirebaseAuthException catch (e) {
  if (e.code == 'user-not-found') {
    print('No user found for that email.');
  } else if (e.code == 'wrong-password') {
    print('Wrong password provided for that user.');
}

Then trigger _success

    If(_success )
    {
        Navigator.push(context,MaterialPageRoute(builder: (context) => const Dashboard()),);
    }

CodePudding user response：

Try This Code

Future<String> loginwithemailandpassword(String email,String password) async {
    FirebaseAuth firebaseauth = FirebaseAuth.instance;
    try {
      UserCredential result = await firebaseauth.signInWithEmailAndPassword(
        email: email,
        password: password,
      );
     if(result != null)
  {
    setState(() {
      user = result.user;
    });
    return "Success";
  }
  else
  {
    return "Unsuccess";
  }


      
    } on FirebaseAuthException catch (error) {
      //print(error.code);
      if (error.code == "invalid-email") {

        return "Invalid Email";
      } else if (error.code == "user-disabled") {

        return "User Disabled";
      } else if (error.code == "user-not-found") {

        return "User not found";
      } else if (error.code == "wrong-password") {

        return "Wrong Password";
      } else {

        return "Unknown Error";
      }
    } on SocketException catch (e) {
      print("Socket Exception Error $e");

      return "Network Error";
    } on TimeoutException catch (e) {

      print("Timeout Error $e");

      return "Timeout Error";
    } catch (e) {

      print("UnExpected Error::$e");
      return "UnExpected Error";
    }
  }

Then OnPressed Write Following Code:

onPressed: () async{
  //login(context);
  String message = await loginwithemailandpassword(emailC.text, passwordC.text);
  if(message == "Success")
  {
     //Do Navigate Like Following
     Navigator.push(context,MaterialPageRoute(builder: (context) => const Dashboard()),);
  }
  else
  {
      print(message);
  }
                                      
},