What's the correct way to implement Tap To Focus for camera?

Question

I\'m working on an app which has a custom camera screen, for which I\'m supposed to implement tap to focus, like in the Android(more specifically, the Galaxy S4) camera app.

Answer 1

One of the other answers causes your camera to discard the focus points previously given and return to continuous focus which I don't think makes sense.

Also if you take a look at the link in the post the original answer uses parameters.setFocusMode(Parameters.FOCUS_MODE_AUTO);

I've implemented the above with this line of code instead of Continuous focus and it seems to work much better.