public void SurfaceChanged(ISurfaceHolder holder, Android.Graphics.Format format, int width, int height) { try { var parameters = Preview.GetParameters(); parameters.SetPreviewSize(previewSize.Width, previewSize.Height); RequestLayout(); switch (windowManager.DefaultDisplay.Rotation) { case SurfaceOrientation.Rotation0: camera.SetDisplayOrientation(90); break; case SurfaceOrientation.Rotation90: camera.SetDisplayOrientation(0); break; case SurfaceOrientation.Rotation270: camera.SetDisplayOrientation(180); break; } Preview.SetParameters(parameters); Preview.StartPreview(); IsPreviewing = true; } catch (Exception ex) { } }