Subclass a C++ abstract class in Java using JNI

Subclass a C++ abstract class in Java using JNI

I have a C++ library that I have to use in an existing Android
implementation. I'm using Android NDK and using the C++ classes via JNI.
However, I am not able to find how to subclass a C++ abstract class in
Java using JNI. Any help is appreciated. Thanks in advance.