If you want to keep the screen on you can use the
setKeepScreenOn(true) method as well...

On Feb 4, 7:58 am, lipinski <[email protected]> wrote:
> I'm trying to implement a times WakeLock in my Application, so this is
> not a Service.
>
> I want the wakelock to simply prevent screen dimming for 3 min.
> Looking through the docs, this seems simple enough, but I seem to
> randomly encounter a Under-Locked exception that I cannot pinpoint.
>
> Here is my WakeLock-related code:
>
> in onCreate:
> ...
>         PowerManager pm = (PowerManager)
> getSystemService(Context.POWER_SERVICE);
>         mWakeLock =
> pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, TAG);
>         // Adjust time to include user's setting
>         int timeout = WAKELOCK_TIME -
> Settings.System.getInt(getContentResolver(), SCREEN_OFF_TIMEOUT, 0);
>         if (timeout > 0) {
>                 mWakeLock.acquire(timeout);
>         }
> ...
>
> in onDestroy:
>         if (mWakeLock != null && mWakeLock.isHeld() == true) {
>                         try {
>                                         mWakeLock.release();
>                                 } catch (Exception e) {
>                                         // TODO Auto-generated catch block
>                                         //e.printStackTrace();
>                                 }
>
>         }
>         super.onDestroy();
>
> As you can see, I wrap the release and try to only execute it when
> necessary as a clean up only.  I'm assuming that since I'm aquiring
> with a timeout, the PowerManager will handle the release in most cases
> when the timeout expires.
>
> I don't have a copy of the logcat at the moment, but what seems to
> happen is I get the Under-Locked exception randomly, and at random
> times (it's not always when WAKELOCK_TIME elapses).  The strange thing
> is that the exception does not point to my code - all the entries
> point to "internal" Android code.
>
> It's hard to find examples of other people using aquire with timeouts.
>
> Any ideas what I could be doing wrong here?

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