[android-developers] stay awake, please

My Galaxy Tab is being exceedingly ornery.  It continues to dim the screen after a few minutes even though I have called this function:

void wake_lock() {

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);

PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK,

"My Tag");

wl.acquire();

}

Anyone know what the issue is?

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