This is mostly a binding around Khaled Mamou’s V-HACD that provides a convenient way to decompose concave meshes into convex hulls, to be used for dynamic bodies in bullet.
The README.md contains all the info you’ll need to use it.
More links: (just for knowledge sake)
v-hacd: GitHub - kmammou/v-hacd: Automatically exported from code.google.com/p/v-hacd
v-hacd-bindings: GitHub - riccardobl/v-hacd-java-bindings: Java bindings for V-HACD (https://github.com/kmammou/v-hacd)
Khaled Mamou’s blog: http://kmamou.blogspot.it/