android - Moshi 1.9.x 无法序列化 Kotlin 类型

Question

升级到 Moshi 1.9.1 (从 1.8.0 )后，我遇到以下崩溃和堆栈跟踪:

java.lang.IllegalArgumentException: Cannot serialize Kotlin type com.garpr.android.data.models.RankedPlayer. Reflective serialization of Kotlin classes without using kotlin-reflect has undefined and unexpected behavior. Please use KotlinJsonAdapter from the moshi-kotlin artifact or use code gen from the moshi-kotlin-codegen artifact.
for class com.garpr.android.data.models.RankedPlayer
for class com.garpr.android.data.models.AbsPlayer

    at com.squareup.moshi.Moshi$LookupChain.exceptionWithLookupStack(Moshi.java:349)
    at com.squareup.moshi.Moshi.adapter(Moshi.java:150)
    at com.squareup.moshi.Moshi.adapter(Moshi.java:98)
    at com.squareup.moshi.AdapterMethodsFactory$AdapterMethod.bind(AdapterMethodsFactory.java:313)
    at com.squareup.moshi.AdapterMethodsFactory.create(AdapterMethodsFactory.java:62)
    at com.squareup.moshi.Moshi.adapter(Moshi.java:138)
    at com.squareup.moshi.Moshi.adapter(Moshi.java:98)
    at com.squareup.moshi.Moshi.adapter(Moshi.java:72)
    at com.garpr.android.data.converters.AbsPlayerConverterTest.setUp(AbsPlayerConverterTest.kt:76)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.robolectric.RobolectricTestRunner$HelperTestRunner$1.evaluate(RobolectricTestRunner.java:546)
    at org.robolectric.internal.SandboxTestRunner$2.lambda$evaluate$0(SandboxTestRunner.java:252)
    at org.robolectric.internal.bytecode.Sandbox.lambda$runOnMainThread$0(Sandbox.java:89)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalArgumentException: Cannot serialize Kotlin type com.garpr.android.data.models.RankedPlayer. Reflective serialization of Kotlin classes without using kotlin-reflect has undefined and unexpected behavior. Please use KotlinJsonAdapter from the moshi-kotlin artifact or use code gen from the moshi-kotlin-codegen artifact.
    at com.squareup.moshi.ClassJsonAdapter$1.create(ClassJsonAdapter.java:83)
    at com.squareup.moshi.Moshi.nextAdapter(Moshi.java:169)
    at com.squareup.moshi.AdapterMethodsFactory$AdapterMethod.bind(AdapterMethodsFactory.java:312)
    at com.squareup.moshi.AdapterMethodsFactory.create(AdapterMethodsFactory.java:62)
    at com.squareup.moshi.Moshi.adapter(Moshi.java:138)
    ... 23 more

我看到了 this other Stack Overflow answer ，但它不适用于我，因为我已经将相关的 @JsonClass(generateAdapter = X) 行添加到我的类中。

我为 AbsPlayerConverter class 类使用自定义 AbsPlayer，这样我就可以确定要解析到哪个子类。然后，如果它解析为 RankedPlayer ，我将使用另一个自定义转换器 ( RankedPlayerConverter )。

这是my Moshi-builder code:

Moshi.Builder()
        .add(AbsPlayerConverter)
        .add(AbsRegionConverter)
        .add(AbsTournamentConverter)
        .add(MatchConverter)
        .add(RankedPlayerConverter)
        .add(SimpleDateConverter)
        .build()

这是 my gradle file 中的 Moshi:

implementation "com.squareup.moshi:moshi:1.9.1"
kapt "com.squareup.moshi:moshi-kotlin-codegen:1.9.1"

最后，在了解了所有这些文字和信息之后，我不知道如何会遇到这次崩溃。我清楚地定义了如何序列化/反序列化我的 RankedPlayer 类。如果我降级到 Moshi 1.8.0，并完全按原样保留我的代码库，则此崩溃就会消失，一切都会完美运行。

大家有什么想法吗？

谢谢!!

Answer 1

错误消息特别指出请使用 moshi-kotlin Artifact 中的 KotlinJsonAdapter 或使用 moshi-kotlin-codegen Artifact 中的代码生成

根据 Kotlin part of the readme ，如果您不使用 Moshi 的 codegen，则必须添加 KotlinJsonAdapterFactory。这是 Moshi 1.9 中的特定行为更改，如 the blog post about Moshi 1.9 所示。 .

Moshi.Builder()
    .add(AbsPlayerConverter)
    .add(AbsRegionConverter)
    .add(AbsTournamentConverter)
    .add(MatchConverter)
    .add(RankedPlayerConverter)
    .add(SimpleDateConverter)
    .add(KotlinJsonAdapterFactory())
    .build()

并确保您使用implementation("com.squareup.moshi:moshi-kotlin:1.9.1")