android保持屏幕常量的方法

首先，需要权限<uses-permission android:name="android.permission.WAKE_LOCK"/>，

代码如下：

private PowerManager mPowerManager;
private WakeLock mWakeLock;

 

mPowerManager = (PowerManager)getSystemService(Context.POWER_SERVICE);
mWakeLock = mPowerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK, "My Lock");

 

@Override 

protectedvoid onResume() { 

    super.onResume(); 

    mWakeLock.acquire(); 

} 

   

@Override 

protectedvoid onPause() { 

    super.onPause(); 

    mWakeLock.release(); 

}