Kotlin Retrofit2 排队 "Unresolved reference Enqueue"

Question

您好，我收到一条未解决的引用入队消息，运行没有可供解决的选项。

回调是在 Fragment 中的按钮 setOnCLickListener 中进行的。

其他建议将 Gradle 版本设置为 3.1.3（以前使用 3.6.1），但错误仍然存在。

        btnSearch.setOnClickListener {

            val service = RetrofitClientInstance.retrofitInstance?.create(GetFlightService::class.java)
            val call = service?.getFlightData(
                "QF",
                "642",
                "departing",
                "2020",
                "05",
                "09",
                "FS",
                "xxxxxxxxx",
                "xxxxxxxxxxxxxxxxxxxxxxxxxxx") //appID and appKey x'd out :)

            call?.enqueue(object : Callback<RetrievedFlightData>{
                override fun onResponse(
                    call: Call<RetrievedFlightData>,
                    response: Response<RetrievedFlightData>
                ) {
                    if (response.code() == 200) {

                        val flightDataBody = response.body()!!

                        val flightData: FlightDTO = getFlightDTOData(flightDataBody)

                    }
                }

                override fun onFailure(call: Call<RetrievedFlightData>, t: Throwable) {
                    TODO("Not yet implemented")
                    Toast.makeText(activity,"Error: Callback faliure - ${t.message}", Toast.LENGTH_LONG).show()

                }
            })

        }

接口是：

interface GetFlightService {


    @GET ("/flex/schedules/rest/v1/json/flight/")
    fun getFlightData(@Query("carrierFSCode") carrierFSCode: String,
                      @Query("flightNumber")flightNumber:String,
                      @Query("departing") departing:String,
                      @Query("year") year:String,
                      @Query("month") month:String,
                      @Query("day") day:String,
                      @Query("codeType") codeType: String,
                      @Query("appID") appID: String,
                      @Query("appKey") appKey:String


    )

}

和客户端实例

object RetrofitClientInstance {

    private var retrofit: Retrofit? = null

    private const val  BASE_URL = "https://api.flightstats.com"

    //create a retrofit instance, only if it has not been created yet.

    val retrofitInstance: Retrofit?
        get() {
            if (retrofit == null){
                retrofit = retrofit2.Retrofit.Builder()
                    .baseUrl(BASE_URL)
                    .addConverterFactory(GsonConverterFactory.create())
                    .build()
            }

            return retrofit
        }
}

Client 实例正常工作，因为我进行了其他正常工作的调用。

另一个问题是我需要等待回复才能继续。我以前在另一个电话中使用过 newSingleThreadExecutor，但我知道这不是最佳做法。也将不胜感激。

谢谢

joncb

Answer 1

将您的 getFlightData() 更改为 return Call<RetrievedFlightData>。于是就变成了：

@GET ("/flex/schedules/rest/v1/json/flight/")
fun getFlightData(@Query("carrierFSCode") carrierFSCode: String,
                  @Query("flightNumber")flightNumber:String,
                  @Query("departing") departing:String,
                  @Query("year") year:String,
                  @Query("month") month:String,
                  @Query("day") day:String,
                  @Query("codeType") codeType: String,
                  @Query("appID") appID: String,
                  @Query("appKey") appKey:String
): Call<RetrievedFlightData>

Kotlin Retrofit2 排队 "Unresolved reference Enqueue"

Kotlin Retrofit2 Enqueue "Unresolved reference Enqueue"

android-fragments

kotlin

retrofit2

enqueue