Java tutorial
package com.idehub.Billing; import android.app.Activity; import com.facebook.react.ReactPackage; import com.facebook.react.bridge.JavaScriptModule; import com.facebook.react.bridge.NativeModule; import com.facebook.react.bridge.ReactApplicationContext; import com.facebook.react.uimanager.ViewManager; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; public class InAppBillingBridgePackage implements ReactPackage { public InAppBillingBridgePackage(String licenseKey, Activity activity) { _licenseKey = licenseKey; _licenseKeySetInConstructor = true; _activity = activity; } public InAppBillingBridgePackage(Activity activity) { _activity = activity; } private String _licenseKey; private Boolean _licenseKeySetInConstructor = false; private Activity _activity; @Override public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) { List<NativeModule> modules = new ArrayList<>(); if (!_licenseKeySetInConstructor) modules.add(new InAppBillingBridge(reactContext, _activity)); else modules.add(new InAppBillingBridge(reactContext, _licenseKey, _activity)); return modules; } @Override public List<Class<? extends JavaScriptModule>> createJSModules() { return Collections.emptyList(); } @Override public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) { return Arrays.<ViewManager>asList(); } }