I had very good memory of using JPCT a few years back. Now I'm trying to do AR programming. Does it support AR purely in Android (no native/NDK)?
It doesn't really "support" it but it doesn't prevent you from doing it either. It's a rendering engine. What you render is up to you. There is this blog post, maybe it helps: https://passospetits.wordpress.com/2015/12/28/augmented-reality-3d-with-jpct-ae-and-artoolkit/ (https://passospetits.wordpress.com/2015/12/28/augmented-reality-3d-with-jpct-ae-and-artoolkit/)