private void SetupUserInterface()
{
_activity = Context as Activity;
_view = _activity.LayoutInflater.Inflate(Resource.Layout.CameraLayout, this, false);
_cameraType = CameraFacing.Back;
_textureView = _view.FindViewById <TextureView>(Resource.Id.textureView);
_textureView.SurfaceTextureListener = this;
_textureView.SetOnTouchListener(this);
}