Registration error - android studio with firebase

Question

First time using Firebase and I also haven't coded in about 5 years, so excuse the rust. I'm just attempting to make a registration with Firebase.

Authentication for email/password has been setup on the real-time database, but whenever I attempt to enter a valid email and password, no matter what I get an error. On both emulator and my S21. Any help to this noob much appreciated:)

public class DriverLoginActivity extends AppCompatActivity {
private EditText mEmail, mPassword;
private Button mLogin, mRegister;

private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener firebaseAuthListener;





mEmail = (EditText) findViewById(R.id.email);
    mPassword = (EditText) findViewById(R.id.password);

    mLogin = (Button) findViewById(R.id.login);
    mRegister = (Button) findViewById(R.id.register);

    mRegister.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            final String email = mEmail.getText().toString();
            final String password = mPassword.getText().toString();
            mAuth.createUserWithEmailAndPassword(email, password).addOnCompleteListener(DriverLoginActivity.this, new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    if(!task.isSuccessful())
                    {
                        Toast.makeText(DriverLoginActivity.this, "Error - Please check username and password requirements", Toast.LENGTH_SHORT).show();
                    }
                    else
                    {
                        String user_id = mAuth.getCurrentUser().getUid();
                        DatabaseReference current_user_db = FirebaseDatabase.getInstance().getReference().child("Users").child("Drivers").child(user_id);
                        current_user_db.setValue(true);
                    }
                }
            });
        }
    });

LOGCAT: 2021-12-14 12:49:35.427 16103-16103/com.example.hippotaxi D/CompatibilityChangeReporter: Compat change id reported: 147798919; UID 10156; state: ENABLED 2021-12-14 12:49:40.439 16103-16131/com.example.hippotaxi W/System: Ignoring header X-Firebase-Locale because its value was null.

Answer 1

You should get the current instance of FirebaseAuth before call the createUserWithEmailAndPassword

On your Activity's OnCreate method, add this line:

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  // Your code if need...
  mAuth = FirebaseAuth.getInstance();
  // Your code if need...
}

And as always, check if your dependencies are up to date