How to find out if an email is already registered with Firebase Simple Login?

Question

I am using firebase (with Angularfire) for an html5 phone app. The user inputs only their email in the start screen, and then, depending on whether that email is already reg

Answer 1

You can add following codes before register()_method in your registerActivity.

FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
if(email.equals(user.getEmail().trim())) {
    Toast.makeText(this, "Email is taken", Toast.LENGTH_SHORT).show();
    return;
}