定义OpenNativeModule 类，实现sendEventToRn静态方法。

public class OpenNativeModule extends ReactContextBaseJavaModule {    private ReactContext mReactContext;    private static ReactContext myContext;    public OpenNativeModule(ReactApplicationContext context) {        super(context);        this.mReactContext = context;        this.myContext = context;    }    @Override    public String getName() {        return "OpenNativeModule";    }    public static void sendEventToRn(String eventName, @Nullable WritableMap paramss)    {        myContext            .getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class)            .emit(eventName, paramss);    }    @ReactMethod // 提供给RN调用的方法    public void openNativeVC() {        Intent intent = new Intent();        intent.setClass(mReactContext, LoginActivity.class);        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        mReactContext.startActivity(intent);    }}

Android 原生方法中调用

// WritableMap 对应 JS 中的 ObjectWritableMap event = Arguments.createMap(); //传递的参数event.putString("userRes",content);OpenNativeModule.sendEventToRn("LoginSuccess", event);

RN监听

componentDidMount() {    this.emitListener = DeviceEventEmitter.addListener('LoginSuccess', (e) => {     // todo    alert(e.userRes);    });}