public CameraCaptureSessionStateCallback(Camera2View cameraView)
 {
     CameraView = cameraView;
 }
 public CameraSurfaceTextureListener(Camera2View cameraView)
 {
     CameraView = cameraView;
 }
 public CameraStateCallback(Camera2View cameraView)
 {
     CameraView = cameraView;
 }