Android手机保持屏幕高亮方法

private PowerManager.WakeLock wakeLock = null; 重写父类Activity的两个方法并添加一下逻辑：@Override   public void onResume() {    super.onResume();      acquireWakeLock(this);   }   @Override   public void onPause() {     super.onPause();     releaseWakeLock();   }   public void acquireWakeLock(Context context) {     if (wakeLock == null) {       PowerManager powerManager = (PowerManager) (context           .getSystemService(Context.POWER_SERVICE));       wakeLock = powerManager.newWakeLock(           PowerManager.SCREEN_DIM_WAKE_LOCK, "My Tag");       wakeLock.acquire();     }   }   public void releaseWakeLock() {     if (wakeLock != null && wakeLock.isHeld()) {       wakeLock.release();       wakeLock = null;     }   }

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