Android: record video with “continuous” auto-focus

Question

I work on video recording; everything works except for requesting continuous focus. This is what I do (tried both in surfaceCreated and surfaceChanged with no success):

Answer 1

Ok, I have sort of solution to this problem: I was able to manually focus camera calling Camera#autoFocus(...).

This still has serious issues. First, calling autofocus while shooting video is not working on some Samsung devices. Also it's not a good idea to force your users to manually focus the camera during video recording.

So if you were able to normally focus your videos while recording - your advice would be very helpful.