Java to Kotlin transition

Hello Everyone,

Been thinking about moving from Java to Kotlin for my future Android projects.
That being said, has anyone here tried porting their Java-based libraries to Kotlin?

How did it went? How did you go about the JNI to C++ interfacing? Are there any fundamental changes required to ofxAndroid for it to work? Did it break your In-App-Purchase/Ad SDK? etc.

In case you’re wondering about the urgency, yes, Ofx is my bread and butter. And right now the only feasible way I could make money from apps is thru Ads and In-App-Purchases.

Thanks in advance to anyone willing to give some hints/tips on this. Will be back in a few hours to check on replies, if any. Thanks.