How to detect backlight is on?
<p>My application requires resource and drains a battery when it is working. So, I want to know the way that user is not available on the phone.</p>

<p>Is there a way to use the built in power save mode on the blackberry to where if the screen dims to suspend the application works active and when the user wakes the device back up with a keypress or trackball movement to resume the application works active?  </p>

<p>Thanks in advance.</p>
