预期为 BEGIN_ARRAY，但在第 1 行第 2 列路径 $ JSON Array Kotlin 处为 BEGIN_OBJECT

问题是，响应返回您 venues 而您期待的是 List<Venue>，所以对您有用的是，创建另一个如下所示的数据类：

data class Venues(
 val venues: List<Venue>
)

然后在 GET 请求中返回 Call<Venues> 请告诉我是否可以为您解决此问题:)

更新

好的，这有点冗长，但最后是您的详细解决方案，希望这可以为您解决所有问题！

视图模型

import androidx.lifecycle.LiveData
import androidx.lifecycle.ViewModel

class ViewModel : ViewModel() {

    private val repository = Repository()

    fun getData(longLat: String,date: String): LiveData<mainResponse?> {

        repository.fetch(longLat,datE)
        return repository.data
    }
}

存储库

import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import retrofit2.Call
import retrofit2.CallBACk
import retrofit2.Response

class Repository {

    private val _data: MutableLiveData<mainResponse?> = MutableLiveData(null)
    val data: LiveData<mainResponse?> get() = _data

    fun fetch(longlat: String,date: String) {

        val retrofit = Retro()
        val api = retrofit.retro.create(api::class.java)

        api.get(
            longLat = longlat,date = date
        ).enqueue(object : CallBACk<mainResponse>{

            override fun onResponse(call: Call<mainResponse>,response: Response<mainResponse>) {

                val res = response.body()
                if (response.code() == 200 && res != null) {

                    _data.value = res

                } else {

                    _data.value = null
                }
            }

            override fun onFailure(call: Call<mainResponse>,t: ThrowablE) {
                _data.value = null
            }
        })
    }
}

主活动

private val viewModel by viewModels<ViewModel>()

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceStatE)
    setContentView(R.layout.activity_main)

    viewModel.getData(
        longLat = "40.7,-74",// sample latitude and longitude
        date = "20210715" // date format is: YYYymMDD
    ).observe(this,Observer {

        it?.let { res ->

            res.response.venues.forEach { venue ->

                val name = venue.name
                val LOCATIOn = venue.LOCATIOn

                Log.d("name ",Name)
                Log.d("address ",LOCATIOn.address)
            }
        }
    })
  }
}

API接口

import retrofit2.Call
import retrofit2.http.GET
import retrofit2.http.Query

interface api {

    @GET("v2/venues/search")
    fun get(
        @Query("ll") longLat: String,@Query("client_id") id: String = Const.clientId,@Query("client_secret") secret: String = Const.clientSecret,@Query("v") date: String
    ): Call<mainResponse>
}

模型类

主响应

数据类 mainResponse( val 响应：响应 )

回复

data class Response(
val venues: List<Venue>,val confident: Boolean
)

位置

data class LOCATIOn(
val address: String,val crossStreet: String,val lng: Double,val lat: Double
)

场地

data class Venue(
val id: String,val name: String,val LOCATIOn: LOCATIOn
)

常量

object Const {

const val BASE_URL = "https://api.foursquare.com"
const val clientId = "" // add yours
const val clientSecret = "" // add yours
}

复古

class Retro {

val retro = Retrofit.builder()
    .baseUrl(Const.bASE_URL)
    .addConverterFactory(GsonConverterFactory.create())
    .build()
}

依赖项：确保添加activity-ktx以便在活动中使用ViewModel

def coroutInes_version = "1.4.2"
implementation "org.jetbrains.kotlinx:kotlinx-coroutInes-core:$coroutInes_version"
implementation "org.jetbrains.kotlinx:kotlinx-coroutInes-android:$coroutInes_version"
implementation "org.jetbrains.kotlinx:kotlinx-coroutInes-play-services:$coroutInes_version"

def lifecycle_version = "2.3.1"
implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version"

def retrofit_version = "2.9.0"
implementation "com.squareup.retrofit2:retrofit:$retrofit_version"
implementation "com.squareup.retrofit2:converter-gson:$retrofit_version"

implementation "androidx.activity:activity-ktx:1.2.3"