Question

Trips.json

{
  "trips":[
      {
         "summary": {
            "subTrips":3,
            "changes":1,
            "duration":"1:09",
            "departure":{
               "date":"2017-05-07",
               "time":"11:46",
            },
            "arrival":{
               "date":"2017-05-07",
               "time":"12:55",
            },
         },
         "subTrips":[
            {
               "departure":{
                  "date":"2017-05-07",
                  "time":"11:46",
               },
               "arrival":{
                  "date":"2017-05-07",
                  "time":"12:07",
               },
               "intermediateStopsKey":"c474e7c"
            },
            {
               "departure":{},
               "arrival":{},
               "intermediateStopsKey":"c81e728"
            }
         ]
      },
      {
         "summary": {},
         "subTrips": [
            { "intermediateStopsKey": "123456" }
         ]
      }
   ]
}

IntermediateStops.json

{
"status": 1,
    "data": [
        {
            "stationName": "Husby",
            "arrivalTime": "19:59",
            "departureTime": "19:59",
        },
        {
            "stationName": "Kista",
            "arrivalTime": "20:01",
            "departureTime": "20:01"
        },
        {
            "stationName": "Hallonbergen",
            "arrivalTime": "20:05",
            "departureTime": "20:05"
        }
    ]
}

我的第一个API调用返回Trips.json。 subTrips包含多个intermediateStopsKey字段。每个intermediateStopsKey都是一个新的API调用，用于获取我需要注入IntermediateStops.json的{{1}}。 Trips.json似乎是这样做的方法，但我需要帮助如何链接命令以获得所需的结果。

flatMap()

请求被正确链接，我不确定如何将我的getIntermediateStops API调用的结果插入到它们各自的SubTripsModels中

Answer 1

API().getTrips(params)
                .observeOn(AndroidSchedulers.mainThread())
                .doOnRequest((Long request) -> dummyView.setVisibility(View.VISIBLE))
                .doOnNext(response -> getTrips(response.body().getData()))
                .doOnCompleted(() -> createListView())
                .flatMap(getTripsModel -> Observable.from(getTripsModel.body().getData().getTrips()))
                .flatMap(tripsModel -> Observable.from(tripsModel.getSubTrips()))
                .map((SubTripsModel subTripsModel) -> API().getIntermediateStops(
                        subTripsModel.getIntermediateStops(), Token.getInstance().TOKEN)
                        .observeOn(AndroidSchedulers.mainThread())
                        .subscribe(new Subscriber<Response<BaseResponseModel<List<IntermediateStopsModel>>>>() {
                            @Override
                            public void onCompleted() {

                            }

                            @Override
                            public void onError(Throwable e) {

                            }

                            @Override
                            public void onNext(Response<BaseResponseModel<List<IntermediateStopsModel>>> baseResponseModelResponse) {
                                subTripsModel.setIntermediateStation(baseResponseModelResponse.body().getData());
                            }
                        }))
                .doOnCompleted(() -> dummyView.setVisibility(View.GONE))
                .subscribe(finalResponse -> {


                }, throwable -> {
                    Log.i("REST ERROR", RestErrorHelper.getErrorMessage(throwable, mContext));
                });

这适用于任何有兴趣的人，您使用flatMap()深入了解嵌套的JSON，当您到达可以迭代subTrips对象数组的点时，您可以使用map()功能并使用subscribe()您可以选择迭代每个subTrip并在那里进行链式调用。

嵌套的JSON和Retrofit flatMap

1 个答案: