cocos2dx 3.0 rc0 on Genmotion

I was try Cocos2d-x with Genymotion? ,but second change i don’t see ,in /cocos2dx/platform/android/java/src/org/cocos2dx/lib/ no have Cocos2dxActivity.java,I only see Cocos2dxActivity.java in src/cpp/Cocos2dxActivity.java,but have nothing, I was try first change but getting error , “not find library cocos2dcpp”.Thank advance !