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

In the past we used the getErrorCode() to get the type of error and fail gracefully. With the newer versions of the api, getErrorCode() is deprecated. We should use response.getError().getErrorCode() instead

com.firebase.ui.auth.IdpResponse
@Deprecated 
public int getErrorCode()
Get the error code for a failed sign in

Deprecated use getError() instead

So for e.g.

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

                super.onActivityResult(requestCode, resultCode, data);

                if (requestCode == RC_SIGN_IN) {
                    IdpResponse response = IdpResponse.fromResultIntent(data);

                    // Successfully signed in
                    if (resultCode == RESULT_OK) {
                        //dbHandler = DBMS.getInstance(this);

                        FirebaseAuth auth = FirebaseAuth.getInstance();
                        FirebaseUser user = auth.getCurrentUser();
                        FirebaseUserMetadata metadata = auth.getCurrentUser().getMetadata();

                        // initialize profile first
                        if (metadata.getCreationTimestamp() == metadata.getLastSignInTimestamp()) {



                            //start main activity after profile setup
                            startActivity(new Intent(this, MainActivity.class));
                            return;
                        } else {
                            // This is an existing user
                            // show them a welcome back screen.

                            startActivity(new Intent(this, MainActivity.class));
                            return;
                        }
                    } else {
                        // Sign in failed
                        // check response for error code
                        if (response == null) {
                            // User pressed back button
                            showSnackbar(R.string.sign_in_cancelled);
                            return;
                        }

                        if (response.getError().getErrorCode() == ErrorCodes.NO_NETWORK) {
                            showSnackbar(R.string.no_internet_connection);
                            return;
                        }

                        if (response.getError().getErrorCode() == ErrorCodes.UNKNOWN_ERROR) {
                            showSnackbar(R.string.unknown_error);
                            return;
                        }
                    }
                    showSnackbar(R.string.unknown_sign_in_response);
                }
            }