How to change the main (Launch) activity during authorization?

Question

Android

How to change the launch activity to another one after authorization through firebase?

Answer 1

mAuth = FirebaseAuth.getInstance();
        FirebaseUser user = mAuth.getCurrentUser();
        if (user != null) {
            Intent intent = new Intent(ACTIVITY.this, User.class);
            startActivity(intent);
            finish();
        }

Answer 2

You make the main activity a conditional LoginActivity, at the start you check whether you are logged in or not, if yes, then start the main activity and do finish for this one, if not, then leave the current activity, when you enter the login and successful authorization, you start the main one and close this one