How to catch a Firebase Auth specific exceptions

Question

Using Firebase, how do I catch a specific exception and tell the user gracefully about it? E.g :

FirebaseAuthInvalidCredentialsException: The email ad

Answer 1

you can use this:

mAuth.getCurrentUser().linkWithCredential(authCredential)
            .addOnCompleteListener(this, new OnCompleteListener() {
                @Override
                public void onComplete(@NonNull Task task) {
                    if (task.isSuccessful()) {
                        Log.d(TAG, "linkWithCredential:success");
                    } else {
                        Log.w(TAG, "linkWithCredential:failure", task.getException());
                        Toast.makeText(getApplicationContext(), "Authentication failed. " + task.getException().toString, Toast.LENGTH_SHORT).show();

                    }

                    // ...
                }
            });