Question

I am making an app with a function to start a Timer. However I am facing a very serious problem.

Now suppose I have stared the timer of 10 minutes using CountDownTimer. After 10 minutes it should give me a beep. Now suppose I have pressed the home button thus making an application go on background. CountDownTimer property is that it continues to countDown, thus after 10 minutes I will get a beep.

However this happens if the screen time is not out. If the screen time is out and the screen goes blank/black then the timer still continues but at its finish, nothing in the application runs like app is on pause and once i click any button on mobile to make the mobile active, the application starts running in the background again..

I want to stop this and want the app to run even the screen time is out too.

How can this be possible.

Answer 1

You will have to get a partial wakelock to keep the CPU running , so that your timer continues to run. Otherwise the device goes to sleep.

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
 PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "Countdown");
 wl.acquire();

In finish you can do a release.

 wl.release();