does openni support 2d camera

Question

Our company want to develop a android app to analyse 2D camera's video frame. By integrating openni sdk, app can get human body keypoints. With keypoints, app find the hand keypoints and hand's location in frame. But after our research, we now find some problems:

• openni's repository in github didn't maintain for 6 years.
• Can we use openni to get human's body keypoints by 2D picture or frame? And how to do.
• If openni can't, is there any other way to solve this in android?