Question

我有一个服务（SkService）用于通过监控ACCELEROMETER从待机状态唤醒我的Nexus4（运行Android 4.2.2），但是当手机进入待机2秒以上时它不起作用。它效果很好我在以下两个案例中：按下电源键后电话很快就会震动。 2.手机连接到我的笔记本电脑

我不知道为什么。感谢是否有人可以帮助我！这里的关键代码是：

    public class SkService extends Service {
private ShakeDetector mShakeDetector;

@Override
public void onCreate() {
    mShakeDetector = new ShakeDetector(SkService.this);
    mShakeDetector.setOnShakeListener(new onShakeListener() {
        @Override
        public void onShake(String value) {
            Log.d(TAG, "Get onShake event with value:" + value);
            Locker.acquireCpuWakeLock(SkService.this);
            Locker.releaseWakeLock();
        }
    });
    mShakeDetector.registerListener();
}

@Override
public void onDestroy() {
    Log.d(TAG, "SkService on Destroy");
    mShakeDetector.unRegisterListener();
    super.onDestroy();
}

@Override
public IBinder onBind(Intent intent) {
    return null;
}
    }

储物柜：

    public class Locker {

private static PowerManager.WakeLock sCpuWakeLock;

public static void acquireCpuWakeLock(Context context) {
    Log.d(TAG, "Acquiring cpu wake lock");
    if (sCpuWakeLock != null) {
        return;
    }
    PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
    KeyguardManager km = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);

    KeyguardManager.KeyguardLock kl = km.newKeyguardLock("SKUnlock KeyGuard");
    Log.d(TAG, "Disable keyguard...");
    kl.disableKeyguard();
    Log.d(TAG, "Keyguard disabled and unlock the screen...");

    sCpuWakeLock = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP
            | PowerManager.ON_AFTER_RELEASE, "SKUnlock");

    sCpuWakeLock.acquire();
    Log.d(TAG, "WakeLock acqiured done");
}

public static void releaseWakeLock() {
    if (sCpuWakeLock == null)
        return;
    sCpuWakeLock.release();
    sCpuWakeLock = null;
    Log.d(TAG, "WakeLock released");
}
    }

我在工作时得到以下日志：

    04-04 20:23:34.013 D/com.skunlock(31730): Get onShake event with value:Shook 0 times:
    04-04 20:23:34.013 D/com.skunlock(31730): diffTime=64,speed=1588.15. x=2.79, y=-3.25,z=15.27,dX=4.52,dY=4.21,Dirc=Left to Right,accuracy2
    04-04 20:23:34.013 D/com.skunlock(31730): Acquiring cpu wake lock
    04-04 20:23:34.013 D/com.skunlock(31730): Disable keyguard...
    04-04 20:23:34.013 D/com.skunlock(31730): Keyguard disabled and unlock the screen...
    04-04 20:23:34.013 I/PowerManagerService(  525): Waking up from sleep...
    04-04 20:23:34.023 D/com.skunlock(31730): WakeLock acqiured done
    04-04 20:23:34.023 D/com.skunlock(31730): WakeLock released
    04-04 20:23:34.023 I/WindowManager(  525): No lock screen!
    04-04 20:23:34.043 D/SurfaceFlinger(  158): Screen acquired, type=0 flinger=0x41634318
    04-04 20:23:34.043 D/hwcomposer(  158): hwc_blank: Doing Dpy=0, blank=0
    04-04 20:23:34.123 D/hwcomposer(  158): hwc_blank: Done Dpy=0, blank=0
    04-04 20:23:34.143 D/overlay (  158): Set pipe=RGB0 dpy=0; Set pipe=RGB1 dpy=0; Set pipe=VG0 dpy=0; Set pipe=VG1 dpy=0;

但是当我的应用程序不能正常工作时，我只有我的应用程序打印的日志，没有任何系统日志（比如，没有锁定屏幕）：

    04-04 20:23:34.333 D/com.skunlock(31730): Get onShake event with value:Shook 0 times:
    04-04 20:23:34.333 D/com.skunlock(31730): diffTime=64,speed=2482.65. x=-1.73, y=-0.91,z=2.05,dX=2.22,dY=7.01,Dirc=Up to Down,accuracy2
    04-04 20:23:34.333 D/com.skunlock(31730): Acquiring cpu wake lock
    04-04 20:23:34.333 D/com.skunlock(31730): Disable keyguard...
    04-04 20:23:34.333 D/com.skunlock(31730): Keyguard disabled and unlock the screen...
    04-04 20:23:34.333 D/com.skunlock(31730): WakeLock acqiured done
    04-04 20:23:34.333 D/com.skunlock(31730): WakeLock released
    04-04 20:23:34.524 D/com.skunlock(31730): Get onShake event with value:Shook 0 times:

Answer 1

考虑使用WakefulBroadcastReceiver，它会为您创建和管理部分唤醒锁。

您仍然需要使用Manifest上的权限：

 <uses-permission android:name="android.permission.WAKE_LOCK" />

PowerManager.WakeLock在手机进入待机2秒后无法正常工作

1 个答案: