gson 延迟的改装请求响应问题

3bygqnnd 于 2022-11-06 发布在其他

关注(0)|答案(1)|浏览(215)

我想对我的Retrofit请求执行异步等待。

@GET("{companyId}/{filename}")
    @Streaming
    suspend fun getFilePart(
        @Path(value = "companyId") companyId: Int,
        @Path(value = "filename") filename: String,
        @QueryMap queryMap: Map<String, String>
    ): Deferred<ResponseBody>

当我从CoroutineScope调用它时

val deferredList = pendingFiles.map {
        async(Dispatchers.IO) {
             try {
                 // runs in parallel in background thread
                 // Consider i have the data parameters....
                 apiManager.mApiService(base).getFilePart(it.companyId, fileName, urlQueryMap)
             } catch (e: Exception) {
                 e.printStackTrace()
             }
        }
     }

因此，请求返回200，这意味着它是成功的，并且我看到了Logging with the File部分的数据。

W/System.err: java.lang.RuntimeException: Unable to invoke no-args constructor for com.google.firebase.inject.Deferred<okhttp3.ResponseBody>. Registering an InstanceCreator with Gson for this type may fix this problem.
W/System.err:     at com.google.gson.internal.ConstructorConstructor$14.construct(ConstructorConstructor.java:228)
W/System.err:     at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:212)
W/System.err:     at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:40)
W/System.err:     at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:27)
W/System.err:     at retrofit2.OkHttpCall.parseResponse(OkHttpCall.java:243)
W/System.err:     at retrofit2.OkHttpCall$1.onResponse(OkHttpCall.java:153)
W/System.err:     at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:520)
W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
W/System.err:     at java.lang.Thread.run(Thread.java:920)
W/System.err: Caused by: java.lang.UnsupportedOperationException: Interface can't be instantiated! Interface name: com.google.firebase.inject.Deferred
W/System.err:     at com.google.gson.internal.UnsafeAllocator.assertInstantiable(UnsafeAllocator.java:117)
W/System.err:     at com.google.gson.internal.UnsafeAllocator$1.newInstance(UnsafeAllocator.java:49)
W/System.err:     at com.google.gson.internal.ConstructorConstructor$14.construct(ConstructorConstructor.java:225)
W/System.err:   ... 9 more

Gson

来源：https://stackoverflow.com/questions/71127175/deferred-retrofit-request-response-problem

1条答案

按热度按时间

dkqlctbz1#

如果你的函数是suspend，它不应该返回Deferred。只需这样声明它：

@GET("{companyId}/{filename}")
@Streaming
suspend fun getFilePart(
    @Path(value = "companyId") companyId: Int,
    @Path(value = "filename") filename: String,
    @QueryMap queryMap: Map<String, String>
): ResponseBody // no Deferred here

带有suspend关键字的函数被当作常规函数使用（这就是协程的美妙之处），所以它们返回一个常规类型。当你使用协程构建器时，你实际上启动了异步代码，就像你使用async时一样--这是一个返回Deferred<T>并且不挂起的代码。

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gson 延迟的改装请求响应问题

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