CameraView A View that displays a preview of the camera with methods takePicture(OnImageCapturedListener), takePicture(File, OnImageSavedListener), startRecording(File, OnVideoSavedListener) and stopRecording()
TextureViewMeteringPointFactory A MeteringPointFactory for creating a MeteringPoint by TextureView and (x,y). 


CameraView.CaptureMode The capture mode used by CameraView. 
CameraView.ScaleType Options for scaling the bounds of the view finder to the bounds of this view.