I wanted a timer and I found that it didn't work when the device went to sleep. I had used AlarmManager but it doesn't work. I also tried service which was still not helpful. Then I tried WakeLock with partial_wake_lock. It worked well at the very beginning but suddenlly failed without changing any code related to the PowerManager or WakeLock. Now it will work for about 1.5 minutes.
The code is:
private void acquireWakeLock(){
PowerManager pm=(PowerManager)getSystemService(Context.POWER_SERVICE);
wl=pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, this.getClass().getCanonicalName());
wl.acquire();
}
private void releaseWakeLock(){
if(wl!=null&&wl.isHeld()){
wl.release();
wl=null;
}
}
As you can see there's nothing special. And basically I did it like this:
//private members,including a wakelock,a handler and a runnable, etc
onCreate{
acquireWakeLock();
init();
handler.postdelayed(runnable,time);
}
//some functions...
a function //called in runnable, which does all work before finish() and it calls releaseWakeLock()
I called the function of acquiring in the Activity's onCreate, and released it when all work has been done. When debugging I can see the lock is already held, but when not plugged in it won't do any work after 1.5 minutes.
How can I make it work, or and is there any solution can work well instead this stupid wake lock? ------update----- I have got all permissions I need and as I've mentioned the WakeLock is already held after calling the acquire function and it can be seen in Watch.
