Flutter: How to listen to the FirebaseUser is Email verified boolean?

Question

My Idea: I want to use the Firebase Auth Plugin in Flutter to register the users. But before they can access the App, they have to verify their Email addres

Answer 1

I just faced the same situation in my app. My solution was to create a periodic timer into the initState method of a strategic route to hold the app until the e-mail is verified. It is not so elegant as using a listener but works fine.

bool _isUserEmailVerified;
Timer _timer;

@override
void initState() {
    super.initState();
    // ... any code here ...
    Future(() async {
        _timer = Timer.periodic(Duration(seconds: 5), (timer) async {
            await FirebaseAuth.instance.currentUser()..reload();
            var user = await FirebaseAuth.instance.currentUser();
            if (user.isEmailVerified) {
                setState((){
                    _isUserEmailVerified = user.isEmailVerified;
                });
                timer.cancel();
            }
        });
    });
}

@override
void dispose() {
    super.dispose();
    if (_timer != null) {
        _timer.cancel();
    }
}