Android brightness change notification (or status bar roll-up notification)
<p>In Android user can change brightness by "rolling down" the status bar (or notification bar, whatever this is called in Android) and changing brightness there. </p>

<p>I need to display brightness slider in my app. I know how to get system brightness value, but the question is how to know if user changed the brightness? When user rolls-up the notification bar I don't get onResume. How do I know that the brightness has changed or the notification bar revealed my activity to the user?</p>
