This is a project that allows you to choose on testing 2 different activities, one is all native, the other one is a React Native activity, and the third one (to be implemented) is a native REcyclerview with RN views as items.
If you’re running on a real device, you’ll need to make the server available to it through the use of facebook/react-native#15388
adb reverse tcp:8081 tcp:8081
Then you’ll be able to do npm start and then on Android Studio run the project to access the ReactNative activity.