java - Firebase Android emailpass authentication error

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65887044/firebase-android-emailpass-authentication-error

Answer 1

You never initialize mAuth anywhere, so when you then call createUserWithEmailAndPassword on it it indeed is invalid.

You'll want to initialize mAuth in onCreate like:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_register);

    mAuth = FirebaseAuth.getInstance();

    EditText id = findViewById(R.id.id);
    EditText pass = findViewById(R.id.pass);

Also see:

• The Firebase documentation on getting started with authentication, which shows this code in step 2.
• What is a NullPointerException, and how do I fix it?