电源锁的获取和释放

要慎用，否则很消耗电源。 官方的例子 PowerManager pm = (PowerManager)getSystemService(Context.POWER_SERVICE); PowerManager.WakeLock wl = pm.newWakeLock( PowerManager.SCREEN_DIM_WAKE_LOCK, "My Tag"); wl.acquire(); .. screen will stay on during this section .. wl.release(); CPU锁 PARTIAL_WAKE_LOCK ：很霸道，按下电源键cpu仍然运行。 PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE); PowerManager. WakeLock wl = pm.newWakeLock( PowerManager.PARTIAL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE, "My Tag"); wl.acquire(); .. screen will stay on during this section .. wl.release(); 屏幕锁 PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE); PowerManager.WakeLock wl = pm.newWakeLock( PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE, "My Tag"); wl.acquire(); .. screen will stay on during this section .. wl.release();