android - Manual focus stacking Camera2 Api -

I'm trying to apply an Android app with the Camera2 API, which is different Should take pictures with focus distance, something like focus stacking.

I have a problem with manual focus, how do I trigger the focus action? LENS_STATUS is always static, so my images are always focused - no focus has been made. I have set the AF_MODE to off and set the distance to focus:

  captureBuilder.set (CaptureRequest.LENS_FOCUS_DISTANCE, minFocus);  

Can someone point to the camera to trigger a focus?