In my application, when the user logs in if he presses onBackPressed() on his smartphone the application should not go back to the previous screen.
When it logs in and I change activity I set it to Intent the following code:
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
In some cell phones the following code works .. In others it does not. What to do?
In order to prevent onBackPressed() doing something in some Activity just overwrite it in Activity in question:
@Override
public void onBackPressed() {
// Não faz nada
}
But in your case, I think it would be ideal to end the Activity login by calling finish() soon after startActivity() that starts the second activity:
startActivity(new Intent(this, SegundaActivity.class));
finish();
So the login activity exits the activities stack and gets the second activity at the top.