Prevent the back button in the login activity

Question

I have an activity named MainActivity and another called LoginActivity. The main activity cannot be visible to logged out users. In the onCreate method of MainAcitivity I verifiy if the user is logged out and then I create the LoginActivity.

The problem is that if the user press the back button of the cellphone, the app go back to the MainActivity.

How I prevent this?

The code of the LoginAcitivity creation is this:

Intent i = new Intent(_context, LoginActivity.class);

i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);         

i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

_context.startActivity(i);

Answer 1

You can call finish(); just after startActivity(). This will kill MainActivity so the back button will close the app.

Answer 2

after: _context.startActivity(i);

put: finish();