Log in screen on first start

Question

how would you create an activity that only runs when the application is started for the first time ever and provides the user with a screen to input a pin and \"unlock\" the app

Answer 1

You can always start with something like "splash screen" activity, that will only check in database/ shared preferences if user is logged in. Then you can run login activity or not. Or in first activity you can show popup window with request of login.