我已经阅读了另一篇关于为miNokiaLumia820制作手电筒应用程序的帖子，我成功地打开了LED，但是当我尝试将其关闭时......我不能，我使用此代码来打开它。varsensorLocation=CameraSensorLocation.Back;try{//gettheAudioViceoCaptureDevicevaravDevice=awaitAudioVideoCaptureDevice.OpenAsync(sensorLocation,AudioVideoCaptureDevice.GetAvailableCaptureResolutions(sensorLocatio