Android Camera2 and OpenCV

I need a demo app that does the following: - use the Camera2 API (not the deprecated Camera API nor the OpenCV camera interface) to open a camera preview stream - feed the preview frame data to OpenCV for processing in a mat for simple canny edge detector will do, in a later project more OpenCV functions. - display the processed result live on the screen. - the process will have to be continuous, that is, without button to get the image. When the activity is opened the camera starts and in backgrown OpenCV processes the images. Once the OpenCV processing is finished for that image, it takes another image as recent as possible in the video pipeline for further processing. This is repeated until the user pauses or exits the activity. I need the demo app as an Android Studio project. It is really important that both the Camera2 API and OpenCV are used, even though there may be other options to achieve the goals of this demo.