当电话屏幕locking时,Android计时器会延迟

我有一个在一个方法中运行TimerTask的服务,它必须每秒计算一次,并在一段时间之后做一些事情。 我的服务工作正常,当我启动服务的方法,计时器开始每秒(1000毫秒)打勾。 问题是,当设备的屏幕closures时,我的计时器有时会停止计数,并且计数不正确。 我可以在日志文件中看到计时器停止15秒,然后运行5秒,然后再次停止…当设备连接到计算机,计时器始终正常工作,当我断开设备从计算机的连接。

这是我的服务:

public class MyService extends Service { private String TAG = getClass().getName(); public void count() { Log.i(TAG, "Service Count Method Start"); int counter; Timer mTimer = new Timer(); mTimer.schedule(new TimerTask() { @Override public void run() { Log.i(TAG, "Timer count value : " + counter); if (!someCondition) { counter++; if (DefaultApplication.notOnDisplayTime >= 180) { Log.d(TAG, "APPLICATION REACHED TIME LIMIT!"); someCondition = true; } else someCondition = false; } else { counter = 0; } } }, 0, 1000); } @Override public IBinder onBind(Intent intent) { // TODO Auto-generated method stub return mBinder; } public class MyServiceBinder extends Binder { public MyService getService() { return MyService.this; } } private final IBinder mBinder = new MyServiceBinder(); @Override public boolean onUnbind(Intent intent) { // TODO Auto-generated method stub Log.i(TAG, "MyService Unbound"); return super.onUnbind(intent); } } 

这里是logcat输出:

  04-25 14:35:22.951 I/com.mypackagename.MyService( 6745): Timer count value : 73 04-25 14:35:23.949 I/com.mypackagename.MyService( 6745): Timer count value : 74 04-25 14:35:24.019 D/dalvikvm( 6832): GC_FOR_MALLOC freed 6656 objects / 495856 bytes in 61ms 04-25 14:35:24.951 I/com.mypackagename.MyService( 6745): Timer count value : 75 04-25 14:35:25.951 I/com.mypackagename.MyService( 6745): Timer count value : 76 

####屏幕在这里被locking####

  04-25 14:35:26.929 I/power ( 96): *** set_screen_state 0] 04-25 14:35:26.959 V/KeyguardViewMediator( 96): password timeout now 04-25 14:35:26.959 D/KeyguardViewManager( 96): show() 04-25 14:35:26.999 D/Sensors ( 96): close_akm, fd=138 04-25 14:35:26.999 I/com.mypackagename.MyService( 6745): Timer count value : 77 04-25 14:35:27.039 D/HtcLockScreen( 96): onScreenRestart 04-25 14:35:27.039 I/HtcLockScreen( 96): updateStatusViewByPriority, mIsSimCheckView = false, mIsBatteryInfo = false, mIsMusicPlaying = false, mIsAirPlaneMode = false 04-25 14:35:27.049 I/HtcLockScreen( 96): HtcLockScreen:onResume 04-25 14:35:27.069 D/SurfaceFlinger( 96): Layer::setBuffers(this=0x785580), pid=96, w=480, h=762 04-25 14:35:27.079 D/SurfaceFlinger( 96): Layer::setBuffers(this=0x785580), pid=96, w=480, h=762 04-25 14:35:27.109 D/SurfaceFlinger( 96): Layer::requestBuffer(this=0x785580), index=0, pid=96, w=480, h=762 success 04-25 14:35:27.339 D/alogcat ( 6832): stopping ... 04-25 14:35:27.339 D/alogcat ( 6832): paused 04-25 14:35:27.609 D/SurfaceFlinger( 96): About to give-up screen, flinger = 0xb4e28 04-25 14:35:27.669 D/AK8973 ( 72): Compass CLOSE 

####屏幕locking####

  04-25 14:35:27.949 I/com.mypackagename.MyService( 6745): Timer count value : 78 04-25 14:35:28.949 I/com.mypackagename.MyService( 6745): Timer count value : 79 04-25 14:35:44.602 I/com.mypackagename.MyService( 6745): Timer count value : 80 04-25 14:35:45.603 I/com.mypackagename.MyService( 6745): Timer count value : 81 04-25 14:35:45.784 I/wpa_supplicant( 256): CTRL-EVENT-SCAN-RESULTS Ready 04-25 14:35:45.799 D/LocationMasfClient( 96): getNetworkLocation(): Returning cache location with accuracy 75.0 04-25 14:35:46.603 I/com.mypackagename.MyService( 6745): Timer count value : 82 04-25 14:35:47.603 I/com.mypackagename.MyService( 6745): Timer count value : 83 04-25 14:35:48.604 I/com.mypackagename.MyService( 6745): Timer count value : 84 04-25 14:35:49.604 I/com.mypackagename.MyService( 6745): Timer count value : 85 04-25 14:36:10.558 D/SurfaceFlinger( 96): Layer::requestBuffer(this=0x785580), index=1, pid=96, w=480, h=762 success 04-25 14:36:11.033 I/com.mypackagename.MyService( 6745): Timer count value : 86 04-25 14:36:13.269 I/com.mypackagename.MyService( 6745): Timer count value : 87 04-25 14:36:13.289 D/com.mypackagename.utils.XUtil( 6745): return 0 char $ 04-25 14:36:14.039 D/com.mypackagename.utils.XUtil( 6745): return 0 char $ 04-25 14:36:14.269 I/com.mypackagename.MyService( 6745): Timer count value : 88 04-25 14:36:17.009 I/com.mypackagename.MyService( 6745): Timer count value : 89 04-25 14:36:29.512 I/com.mypackagename.MyService( 6745): Timer count value : 90 

你可以看到在屏幕locking之后,计时器似乎不会每秒都打勾。 它停止15 – 20秒,然后正常工作5秒钟…

设备屏幕locking时如何防止计时器停止的任何意见?

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