no, that topic is about using the Objective-C API of Realm from Java through our Nat/J library. It will work, but you will end up with separate APIs for your database, depending on the platform, and you will need to implement an abstraction layer yourself.
I can’t give you a step-by-step guide on how to compile the JNI library for CouchBase for iOS, because I don’t know the CouchBase project’s build system. But if you do that, you will have a single Java API for CouchBase, that you can use from Android and iOS as well.
We plan to prepare a tutorial on how to do this (and also Realm), but I can’t give you an exact timeline.
If you need this solution quicker, and it is an option for you, we at Migeran provide also commercial consulting and development services around MOE.