Timer Slows down in Service when device screen lock

Question

I am using a countdown timer in a service.The timer goes on like that 01,02,03,.... Everything works fine.But when the device screen lock the timer becomes slow but still running.I am using the PowerManager but not working.PowerManager only works when the USB cable connected to the PC but when i remove the device from PC timer slows down.I do not know why this problem arises.Please help me to sort out this problem.Thank in advace.Below is my code.

 @Override
    public void onCreate(){
        super.onCreate();

        PowerManager pm = (PowerManager)getSystemService(Context.POWER_SERVICE);
        wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "whatever");
        wl.acquire();

        }

    @Override
    public void onStart(Intent intent, int startId) {
        super.onStart(intent, startId);

        flagVibrate=intent.getBooleanExtra("FlagVibrate",false);
        if(mStartTime == 0L){
            mStartTime = SystemClock.uptimeMillis();
            mHandler.removeCallbacks(mUpdateTimeTask);
            mHandler.postDelayed(mUpdateTimeTask, 100);

        }
    }

        @Override
    public void onDestroy() {

        super.onDestroy();
        mHandler.removeCallbacks(mUpdateTimeTask);

        stopSelf();
        wl.release();
    }
        private Runnable mUpdateTimeTask = new Runnable(){

        public void run() {

        final long start = mStartTime;
        long millis = SystemClock.uptimeMillis()- start;

        int seconds = (int) (millis / 1000);
        int stopTime = (int) (millis / 1000);
        int minutes = seconds / 60;
        seconds = seconds % 60;

        GuardMeActivity.timerView.setText("" + minutes + ":"
                              + String.format("%02d", seconds));

        timerStop1 = minutes + ":"
                  + String.format("%02d", seconds);



        }

}

};

Yes i already gave this permission.The PowerManager only works when the USB cable connected to the PC but when i remove the device from PC timer slows down. — Deepak Sharma, Oct 17 '13 at 07:13
@Deepak, I am also facing the same issue. Were you able to resolve this? — iwekesi, Mar 23 '20 at 15:07
Yes, I have resolved the issue but this problem came before 6 years so I forgot what I did.. Sorry bro — Deepak Sharma, Mar 27 '20 at 03:53

Vigbyor · Answer 1 · 2013-10-17T06:47:27.873

2

Write down following code in your GuardMeActivity activity's onResume() method and check the result.

Files to import

import android.view.Window;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;

Window window = this.getWindow();
window.addFlags(LayoutParams.FLAG_DISMISS_KEYGUARD);
window.addFlags(LayoutParams.FLAG_SHOW_WHEN_LOCKED);
window.addFlags(LayoutParams.FLAG_TURN_SCREEN_ON);

edited Oct 17 '13 at 06:47

answered Oct 17 '13 at 06:18

Vigbyor

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Sorry !! Not working :( Actually timer slows down only when the device screen locks otherwise everything is working fine. – Deepak Sharma Oct 17 '13 at 06:34
Which device you are using ? – Vigbyor Oct 17 '13 at 06:37
I am using Nexus tab..Can u please tell me the package name to import LayoutParams class.So many packages are shown. – Deepak Sharma Oct 17 '13 at 06:42
PowerManager only works when the USB cable connected to the PC but when i remove the device from PC timer slows down.I do not know why this problem arises. – Deepak Sharma Oct 17 '13 at 07:00

Timer Slows down in Service when device screen lock

1 Answers1