Kotlin-java.lang.IllegalStateExpection：预期为BEGIN_ARRAY，但为STRING

问题描述

我遇到了这个问题。我已经在互联网上搜索过，但答案是Java，而不是Kotlin。我该如何解决？如果您还有其他需要，请告诉我。我正在尝试获取距离最近的餐馆作为用户位置。目前，我正在使用静态变量，因为我还无法获得Zomato APi。我怎样才能做到这一点？自从我开始学习Kotlin以来已经有4-5天了

我的餐厅数据类

data class Restaurant(
    @SerializedName("name")
    val restName: String?,@SerializedName("address")
    val restAddress: String?
)

我的API接口

interface ZomatoAPI {

    @Headers(
        "Accept: application/json","user-key: $API_KEY"
    )
    @GET("/search")
    fun getRestaurants(@Query("count") count: Int,@Query("lat") latitude: Double,@Query("lon") longitude: Double,@Query("sort") sort : String,@Query("order") order : String

    ): Single<List<Restaurant>>

}

我的服务等级

class RestaurantService{

    private val baseUrl = "https://developers.zomato.com/api/v2.1/"
    private val api: ZomatoAPI
    private val latitude = 41.2
    private val longitude = 28.2

    init {


        api = Retrofit.Builder()
            .baseUrl(baseUrl)
            .addConverterFactory(GsonConverterFactory.create(GsonBuilder().setLenient().create()))
            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
            .build()
            .create(ZomatoAPI::class.java)
    }

    fun getRestaurants(): Single<List<Restaurant>>{
        return api.getRestaurants(5,latitude,longitude,"rating","desc")
    }

}

我的ListViewModel

class ListViewModel: ViewModel(){

    private val restaurantService = RestaurantService()
    private val disposable = CompositeDisposable()

    val restaurants = MutableLiveData<List<Restaurant>>()
    val restaurantLoadError = MutableLiveData<Boolean>()
    val loading = MutableLiveData<Boolean>()

    fun refresh() {
        fetchRestaurants()
    }

    private fun fetchRestaurants() {
        loading.value = true

        restaurantService.getRestaurants()
                .subscribeOn(Schedulers.newThread())
                .observeOn(AndroidSchedulers.mainThread())

                .subscribeWith(object: DisposableSingleObserver<List<Restaurant>>(){
                    override fun onSuccess(value: List<Restaurant>?) {
                        restaurants.value = value
                        restaurantLoadError.value = false
                        loading.value = false
                    }

                    override fun onError(e: Throwable?) {
                        restaurantLoadError.value = true
                        loading.value = false
                    }

                })

    }

    override fun onCleared() {
        super.onCleared()
        disposable.clear()
    }

}

Zomato API的响应正文

{
  "results_found": 1499579,"results_start": 0,"results_shown": 2,"restaurants": [
    {
      "restaurant": {
        "R": {
          "has_menu_status": {
            "delivery": -1,"takeaway": -1
          },"res_id": 18047914,"is_grocery_store": false
        },"apikey": "61528551ffc800703d600cb2c25e6900","id": "18047914","name": "The Mossy Cafe","url": "https://www.zomato.com/mossy-point-nsw/the-mossy-cafe-mossy-point?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1","location": {
          "address": "31 Pacific Street,Mossy Point","locality": "Mossy Point","city": "Mossy Point","city_id": 2181,"latitude": "-35.8369730000","longitude": "150.1796610000","zipcode": "","country_id": 14,"locality_verbose": "Mossy Point,Mossy Point"
        },"switch_to_order_menu": 0,"cuisines": "Cafe Food,Coffee and Tea","timings": "7:30am – 3pm (Mon-Sun)","average_cost_for_two": 50,"price_range": 4,"currency": "$","highlights": [
          "Cash","Debit Card","No Alcohol Available","Credit Card","Breakfast","Lunch","Kid Friendly","Vegan Options","Pet Friendly","Indoor Seating","Gluten Free Options"
        ],"offers": [],"opentable_support": 0,"is_zomato_book_res": 0,"mezzo_provider": "OTHER","is_book_form_web_view": 0,"book_form_web_view_url": "","book_again_url": "","thumb": "","user_rating": {
          "aggregate_rating": "3.9","rating_text": "Good","rating_color": "9ACD32","rating_obj": {
            "title": {
              "text": "3.9"
            },"bg_color": {
              "type": "lime","tint": "600"
            }
          },"votes": 7
        },"all_reviews_count": 0,"photos_url": "https://www.zomato.com/mossy-point-nsw/the-mossy-cafe-mossy-point/photos?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1#tabtop","photo_count": 42,"menu_url": "https://www.zomato.com/mossy-point-nsw/the-mossy-cafe-mossy-point/menu?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1&openSwipeBox=menu&showMinimal=1#tabtop","featured_image": "","has_online_delivery": 0,"is_delivering_now": 0,"store_type": "","include_bogo_offers": true,"deeplink": "zomato://restaurant/18047914","is_table_reservation_supported": 0,"has_table_booking": 0,"events_url": "https://www.zomato.com/mossy-point-nsw/the-mossy-cafe-mossy-point/events#tabtop?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1","phone_numbers": "02 4471 8599","all_reviews": {
          "reviews": []
        },"establishment": [
          "Café"
        ],"establishment_types": []
      }
    },{
      "restaurant": {
        "R": {
          "has_menu_status": {
            "delivery": -1,"res_id": 16611721,"id": "16611721","name": "Blue Swimmer at Seahaven","url": "https://www.zomato.com/gerroa-nsw/blue-swimmer-at-seahaven-gerroa?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1","location": {
          "address": "19 Riverleigh Ave,Gerroa,Gerroa","locality": "Gerroa","city": "Gerroa","city_id": 2154,"latitude": "-34.7697390000","longitude": "150.8117400000","zipcode": "2534","locality_verbose": "Gerroa,Gerroa"
        },"cuisines": "Modern Australian,Australian","timings": "7 AM to 3 PM (Mon,Tue,Wed,Thu,Sun),7 AM to 3 PM,5:30 PM to 11 PM (Fri-Sat)","average_cost_for_two": 20,"price_range": 2,"Dinner","Table booking recommended","Outdoor Seating"
        ],"votes": 21
        },"all_reviews_count": 11,"photos_url": "https://www.zomato.com/gerroa-nsw/blue-swimmer-at-seahaven-gerroa/photos?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1#tabtop","photo_count": 15,"menu_url": "https://www.zomato.com/gerroa-nsw/blue-swimmer-at-seahaven-gerroa/menu?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1&openSwipeBox=menu&showMinimal=1#tabtop","deeplink": "zomato://restaurant/16611721","events_url": "https://www.zomato.com/gerroa-nsw/blue-swimmer-at-seahaven-gerroa/events#tabtop?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1","phone_numbers": "[phone]","all_reviews": {
          "reviews": [
            {
              "review": []
            },{
              "review": []
            },{
              "review": []
            }
          ]
        },"establishment": [
          "Casual Dining"
        ],"establishment_types": []
      }
    }
  ]
}

解决方法

您的getRestaurants方法应如下所示：

interface ZomatoAPI {

@Headers(
    "Accept: application/json","user-key: $API_KEY"
)
@GET("/search")
fun getRestaurants(@Query("count") count: Int,@Query("lat") latitude: Double,@Query("lon") longitude: Double,@Query("sort") sort : String,@Query("order") order : String

): Single<RestaurantResponse>

}

您的模型类应该是这样，

data class RestaurantResponse(
    @SerializedName("restaurants")
    val restaurants: List<Restaurant>?,@SerializedName("results_found")
    val results_found: Int?
    @SerializedName("results_start")
    val results_start: Int?
    @SerializedName("results_shown")
    val results_shown: Int?
)