Camera.PreviewCallback equivalent in Camera2 API

Question

Is there any equivalent for Camera.PreviewCallback in Camera2 from API 21,better than mapping to a SurfaceTexture and pulling a Bitmap ? I need to be able to pull preview data o

Answer 1

Yes, use the ImageReader class.

Create an ImageReader using the format ImageFormat.YUV_420_888 and your desired size (make sure you select a size that's supported by the camera device you're using).

Then use ImageReader.getSurface() for a Surface to provide to CameraDevice.createCaptureSession(), along with your other preview outputs, if any.

Finally, in your repeating capture request, add the ImageReader provided surface as a target before setting it as the repeating request in your capture session.