What I meant was that wanted to do the same job you did.
I wanted to recreate the wrapper for this library, downloading packages frederico silva , and rewrite your BuilderWrapper.java file and recompile .jar file.
I was reading about creating a wrapper library for existing java library in B4A , but I have not managed to do after two days of testing with eclipse , in SLC , ... Problems dependencies and other things.
I know php, mysql, .net, etc, but very very few things of java. May be this was the problem.