To what extent is it possible to control the phone camera parameters, is it possible to lock the focus?

Question

Android

You need to quickly take pictures, many times per second, but the trouble is that every time the camera makes at least one focus cycle ... Can this be avoided?
Is it possible to speed up this process by measuring the focal length and exposure parameters in advance, and when will it be necessary to sharply start cutting pictures?

Answer 1

iOS 8 seems to have given access to these options.
The AVFoundation framework makes it easier than ever for users to take great photos. Your app can take direct control over the camera focus, white balance, and exposure settings. Your app can also use bracketed exposure captures to automatically capture images with different exposure settings.
AV Foundation Framework Reference You can also look here
( pay attention to the properties and methods Available in iOS 8.0 and later. And, of course, to the Tasks section)