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Is it possible to lock a user in an activity, so that it is impossible to navigate away from it without entering a pin or in other ways “unlocking”? If so, how?
Would be very useful for a an app used in a public setting, like a tablet on display.
You cannot stop the user from navigating away from your application via the home button (and you cannot stop other activities from opening). However you are notified when these things happen through your onPause() callback, and if the user returns to you, onResume() is called. You can require a pin at the point of resumption.