Caused by: kotlinx.serialization.SerializationException: Serializer for class ‘PostType‘ is not foun-优快云博客

本文链接：https://blog.youkuaiyun.com/JIULANG9/article/details/122164164

这篇博客主要讨论了一个在使用Retrofit和Kotlinx Serialization时遇到的问题：IllegalArgumentException，原因是无法为NetResult类型创建转换器，特别是对于ArrayList<PostType>的处理。错误的根本原因在于`PostType`类没有被标记为@Serializable或没有提供明确的序列化器。解决方案是在项目的build.gradle文件中添加kotlin-serialization插件和相关依赖，并正确配置。遵循这些步骤可以修复序列化异常，确保网络请求的正常进行。

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log

 java.lang.IllegalArgumentException: Unable to create converter for com.jiulang.wordsfairy.net.NetResult<java.util.ArrayList<com.jiulang.wordsfairy.entity.PostType>>
        for method PostService.getHomepageClassifyList
        at retrofit2.Utils.methodError(Utils.java:54)
        at retrofit2.HttpServiceMethod.createResponseConverter(HttpServiceMethod.java:126)
        at retrofit2.HttpServiceMethod.parseAnnotations(HttpServiceMethod.java:85)
        at retrofit2.ServiceMethod.parseAnnotations(ServiceMethod.java:39)
        at retrofit2.Retrofit.loadServiceMethod(Retrofit.java:202)
        at retrofit2.Retrofit$1.invoke(Retrofit.java:160)
        at java.lang.reflect.Proxy.invoke(Proxy.java:1006)
        at $Proxy3.getHomepageClassifyList(Unknown Source)
        at com.jiulang.wordsfairy.repository.PostRepository$getHomepageClassifyList$2.invokeSuspend(PostRepository.kt:10)
        at com.jiulang.wordsfairy.repository.PostRepository$getHomepageClassifyList$2.invoke(Unknown Source:8)
        at com.jiulang.wordsfairy.repository.PostRepository$getHomepageClassifyList$2.invoke(Unknown Source:4)
        at com.jiulang.wordsfairy.ext.CoroutinesKt$netRequest$2$1.invokeSuspend(Coroutines.kt:24)
        at com.jiulang.wordsfairy.ext.CoroutinesKt$netRequest$2$1.invoke(Unknown Source:8)
        at com.jiulang.wordsfairy.ext.CoroutinesKt$netRequest$2$1.invoke(Unknown Source:4)
        at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturnIgnoreTimeout(Undispatched.kt:100)
        at kotlinx.coroutines.TimeoutKt.setupTimeout(Timeout.kt:148)
        at kotlinx.coroutines.TimeoutKt.withTimeout(Timeout.kt:44)
        at com.jiulang.wordsfairy.ext.CoroutinesKt$netRequest$2.invokeSuspend(Coroutines.kt:23)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
        at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
        at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)
     Caused by: kotlinx.serialization.SerializationException: Serializer for class 'PostType' is not found.
    Mark the class as @Serializable or provide the serializer explicitly.
        at kotlinx.serialization.internal.Platform_commonKt.serializerNotRegistered(Platform.common.kt:91)
        at kotlinx.serialization.SerializersKt__SerializersJvmKt.reflectiveOrContextual$SerializersKt__SerializersJvmKt(SerializersJvm.kt:114)
        at kotlinx.serialization.SerializersKt__SerializersJvmKt.typeSerializer$SerializersKt__SerializersJvmKt(SerializersJvm.kt:86)
        at kotlinx.serialization.SerializersKt__SerializersJvmKt.serializer(SerializersJvm.kt:45)
        at kotlinx.serialization.SerializersKt.serializer(Unknown Source:1)
        at kotlinx.serialization.SerializersKt__SerializersJvmKt.serializer(SerializersJvm.kt:50)
        at kotlinx.serialization.SerializersKt.serializer(Unknown Source:1)
        at kotlinx.serialization.SerializersKt__SerializersJvmKt.serializer(SerializersJvm.kt:73)
        at kotlinx.serialization.SerializersKt.serializer(Unknown Source:1)
        at com.jakewharton.retrofit2.converter.kotlinx.serialization.Serializer.serializer(Serializer.kt:24)
        at com.jakewharton.retrofit2.converter.kotlinx.serialization.Factory.responseBodyConverter(Factory.kt:28)
        at retrofit2.Retrofit.nextResponseBodyConverter(Retrofit.java:362)
        at retrofit2.Retrofit.responseBodyConverter(Retrofit.java:345)
        at retrofit2.HttpServiceMethod.createResponseConverter(HttpServiceMethod.java:124)
        	... 22 more

重点在这

 Caused by: kotlinx.serialization.SerializationException: Serializer for class 'PostType' is not found.
    Mark the class as @Serializable or provide the serializer explicitly.

原因是

kotlin-serialization插件没有安装

解决办法

 ext {
        kotlin_version = '1.5.31'
    }
  dependencies {
      ...
  classpath "org.jetbrains.kotlin:kotlin-serialization:$kotlin_version"
      ...
       
    }

app/build.gradle

plugins {
    ...
    id "kotlin-parcelize"
    ...
}
dependencies {
 ...
     implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.0.1"
     ...
}