How to build jar file for Android application?

[anhtuanmai]

Is this possible to build a jar file for Android application like a library?

[frankmorgner]

See https://github.com/CardContact/opensc-java, it includes Android Makefiles

[anhtuanmai]

@frankmorgner Would you like to guide me a little more please? I tried a lot to work it out but I did not make it.