Call this during NoType:android/view/KeyEvent$Callback;Href=../../../reference/android/view/KeyEvent.Callback.html#onKeyDown(int, android.view.KeyEvent) to have the system track the key through its final up (possibly including a long press). Note that only one key can be tracked at a time -- if another key down event is received while a previous one is being tracked, tracking is stopped on the previous event.