在复杂的商城项目中，有这么一种情况，一个页面需要请求多个接口数据，采用普通方法同时请求，但是返回的时间都不一致，就会造成页面闪烁或者抖动，用户体验不好。

rxjava zip操作符可以完成这样的操作，多个接口请求数据，所有接口请求完后，才做页面渲染。

 假如要请求两个数据，一个是轮播图相关数据，一个是系统消息列表数据,

1.写一个bean合并两个数据

2. 合并两个请求

完整代码

 /**
     * 首页信息  合并请求
     */
    @Override
    public void requestHomeMsg() {
        //获取轮播图 直播 信息
        CommonUtils.getInstance().showInfoProgressDialog(mContext);
        Observable<BaseRespose<MainHomeMsgModel>> observable1 = httpTask.requestHomeMsg(1, UserInfoModel.getInstance().getId());
        //消息
        Observable<BaseRespose<List<SystemMsgModel>>> observable2 = httpTask.requestSysTemMsg(UserInfoModel.getInstance().getId());
        Observable.zip(observable1, observable2, new Func2<BaseRespose<MainHomeMsgModel>, BaseRespose<List<SystemMsgModel>>, ZipMainHomeDataModel>() {
            @Override
            public ZipMainHomeDataModel call(BaseRespose<MainHomeMsgModel> mainHomeMsgModelBaseRespose, BaseRespose<List<SystemMsgModel>> listBaseRespose) {
                return new ZipMainHomeDataModel(mainHomeMsgModelBaseRespose.data, listBaseRespose.data);
            }
        }).subscribeOn(Schedulers.newThread())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Subscriber<ZipMainHomeDataModel>() {


                    @Override
                    public void onCompleted() {
                        CommonUtils.getInstance().hideInfoProgressDialog();
                        xRecyclerView.refreshComplete();
                    }

                    @Override
                    public void onError(Throwable e) {
                        CommonUtils.getInstance().hideInfoProgressDialog();
                        xRecyclerView.refreshComplete();
                    }

                    @Override
                    public void onNext(ZipMainHomeDataModel zipMainHomeDataModel) {
                        if (zipMainHomeDataModel != null) {
                            dealHomeMsg(zipMainHomeDataModel.mainHomeMsgModel);
                           // dealSysMsg(zipMainHomeDataModel.list);
                            notifyAdapter();
                        }
                    }
                });
    }

public class ZipMainHomeDataModel {
    public MainHomeMsgModel mainHomeMsgModel;//轮播图等信息
    public  List<SystemMsgModel> list;//系统消息


    public ZipMainHomeDataModel(MainHomeMsgModel mainHomeMsgModel, List<SystemMsgModel> list) {
        this.mainHomeMsgModel = mainHomeMsgModel;
        this.list = list;
    }
}