Flutter: bloc, how to show an alert dialog

Question

I´m new in the bloc pattern and stream stuff. I want to show up an alert dialog when I press a button, but I can´t find a way to do it. Actually my code is:

Widg         


        

Answer 1

Here is what I did, it might be wrong as I'm also new to flutter. But works for my scenario.

Widget build(BuildContext context) {
final authBloc = BlocProvider.of(context);

authBloc.outServerResponse.listen((serverResponse) {
  if (serverResponse.status == 'success') {
    _navigateToLogin();
  } else {
    _showSnakBar(serverResponse.message);
  }
});
.... Rest of the code which returns the widget, 
which in my case is form widget with button for submitting as follows,
onPressed: () {
  if (_formKey.currentState.validate()) {
      _formKey.currentState.save();
      authBloc.processRegister.add(_registrationData.toMap());
  }
}

outServerResponse is the stream that outputs after finishing API POST call.

authBloc.processRegister is the input sink to pass form data to my Auth API Service Provider.

_nagivateToLogin & _showSnakBar are simple functions

_navigateToLogin() {
      Navigator.of(context).pop();
}

_showSnakBar(String msg) {
     Scaffold.of(context).showSnackBar(
      SnackBar(
        content: Text(msg),
      ),
     );
 }