RNConfig

RNConfig.java

public class RNConfig extends ReactContextBaseJavaModule {
    public RNConfig(ReactApplicationContext reactApplicationContext) {
        super(reactApplicationContext);
    }

    @Override
    public String getName() {
        return "RNConfig";
    }

    @Nullable
    @Override
    public Map<String, Object> getConstants() {
        final Map<String, Object> constants = new HashMap<>();
        constants.put("buildEnvironment", BuildConfig.BUILD_ENV);
        return constants;
    }
}