App is not loading

[sharmahal]

after adding video calling functionality to the app. when I run the app, it just shows the circular progress indicator.

the error I am getting is -
E/flutter (25915): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: NoSuchMethodError: The method '[]' was called on null.
E/flutter (25915): Receiver: null
E/flutter (25915): Tried calling:

[Ronak99]

Well, since this is a run time issue, I'd probably need to see the code. Please host a gist for the corresponding code and share the link.

[sharmahal]

https://gist.github.com/sharmahal/13cbebf847de8ee44aca030ccdc5cc41

[sharmahal]

Well, since this is a run time issue, I'd probably need to see the code. Please host a gist for the corresponding code and share the link.

https://gist.github.com/sharmahal/13cbebf847de8ee44aca030ccdc5cc41

[Ronak99]

You did too much hard work in creating all those gists, if you did everything manually.
You could've just shared the code repository with me.
I only wanted the code from the file where you are stuck, because I already have the code for which you went through all that trouble of creating gists.

Anyways, please let me know which branch are you on, and compare the code with that branch. I'll try my best to locate the problem.

[sharmahal]

You did too much hard work in creating all those gists, if you did everything manually.
You could've just shared the code repository with me.
I only wanted the code from the file where you are stuck, because I already have the code for which you went through all that trouble of creating gists.

Anyways, please let me know which branch are you on, and compare the code with that branch. I'll try my best to locate the problem.

I am on part 12, I tried comparing the code with this branch.

[AndreLiu1225]

Hello. Many thanks for the video tutorials. It is really a stepping stone for me in flutter. However, have you solved this issue yet by any chance?

[Lorngdy68]

I also face this problem too. Could you check this code?

import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import 'package:shimmer/shimmer.dart';
import 'package:skypeclone/resources/firebaserepository.dart';
import 'package:skypeclone/screens/homescreen.dart';
import 'package:skypeclone/utils/universalvariables.dart';

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

@OverRide
_LoginScreenState createState() => _LoginScreenState();
}

class _LoginScreenState extends State {

FirebaseRepository _repository = FirebaseRepository();

bool isLoginPressed = false;

@OverRide
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: UniversalVariables.blackColor,
body: Stack(
children: [
Center(
child: loginButton(),
),
isLoginPressed ? Center(child: CircularProgressIndicator(),
) : Container(),
],
),
);
}

Widget loginButton() {
return Shimmer.fromColors(
baseColor: Colors.white,
highlightColor: UniversalVariables.senderColor,
child: Center(
child: ElevatedButton(
onPressed: () => performLogin(),
child: Text("LOGIN"),
// style: ButtonStyle(shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10))),
),
),
);
}

void performLogin() {

print("Bring to perform login");
setState(() {
  isLoginPressed = true;
});

_repository.signIn().then((User user) => {
  if(user != null) {
    authenticateUser(user),
  }
  else {
    print("There was an error"),
}
});

}

void authenticateUser(User user) {
_repository.authenticateUser(user).then((isNewUser) {
setState(() {
isLoginPressed = false;
});

  if(isNewUser) {
    _repository.addDataToDb(user).then((value){
      Navigator.pushReplacement(context, MaterialPageRoute(builder: (context) =>
         HomeScreen()
      ));
    });
  }
  else {
    Navigator.pushReplacement(context, MaterialPageRoute(builder: (context) =>
        HomeScreen()
    ));
  }
});

}

}