Exposing custom Android modules

Often, you'll find the need for React Native applications to interface with native iOS and Android code. Having discussed integrating native iOS modules, now it's time to cover the equivalent recipes in Android.

This recipe will take us through writing our first Android native module. We're going to create a HelloManager native module with a greetUser method that takes name and an isAdmin Boolean as arguments, which will return a greeting message that we'll display in the UI.

Getting ready

For this recipe, we'll need to create another pure React Native app. Let's name this project NativeModuleApp as well.

We'll also be making use of the react-native-button...