title: Which methods gets called when the user presses the standby button?
body: <p>Other than onPause() are there any callbacks that run when the user presses the standby/sleep button?
  Like <a href="http://developer.android.com/reference/android/app/Activity.html#onBackPressed%28%29" rel="nofollow">onBackPressed()</a> when pressing the back button.</p>