Hello. Just wanted to share a repo I created for anyone else who also uses the EasyNDK library for communication between their game and the native Java/Obj-C environment. I updated the original project away from deprecated classes and memory leak issues. The new code can be found here: https://github.com/alfonsocejudo/EasyNDK-for-cocos2dx3
Please let me know if you need help with getting it to work. Thanks, and happy coding!