android - Moshi 适配器创建失败 : "requires explicit JsonAdapter to be registered"

Question

 var wall= ArrayList<VKWall>()
    try {
         val response = r.getString("response") as String
        val moshi = Moshi.Builder().build()
        val type: Type = Types.newParameterizedType(
            ArrayList::class.java,
            VKWall::class.java
        )
        val jsonAdapter: JsonAdapter<ArrayList<VKWall>> = moshi.adapter(type)

        wall = jsonAdapter.fromJson(response)!!

    } catch (e: JSONException){}

    return wall

它不能创建适配器。调试器无法执行此字符串并通过此代码进入函数异常

val jsonAdapter: JsonAdapter<ArrayList<VKWall>> = moshi.adapter(type)

我正在尝试像那里一样做所有事情
https://github.com/square/moshi

Platform java.util.ArrayList<com.e.app.fragments.vk_tabs.WallFragment.DataPackage.VKWall> (with no annotations) requires explicit JsonAdapter to be registered


@Parcelize
@JsonClass(



   generateAdapter = true)
    data class VKWall (
      //  val UserName:String="",
       // val UserSurname:String="",
        @Json(name = "text")
        val Text:String="" ,
      //  val attachments: Attachments?,
      //  val copyright: String="",
      //  val repost: Repost? 
    ):Parcelable
    {


    }

Answer 1

问题在于，moshi 没有适用于您的 VKWall 类的适配器。要解决此问题，您可以添加 KotlinJsonAdapterFactory基于反射(reflection):

val moshi = Moshi.Builder()
    // ... add your own JsonAdapters and factories ...
    .add(KotlinJsonAdapterFactory())
    .build()

或者您可以像这样使用生成的适配器:

// Annotate yours class @JsonClass(generateAdapter = true)
@JsonClass(generateAdapter = true)
class VKWall(
 ....
)

更多关于此的文档 https://github.com/square/moshi#kotlin

更多关于你的问题 https://www.zacsweers.dev/a-closer-look-at-moshi-1-9/

Now, for Kotlin classes, you either need to use code gen, KotlinJsonAdapterFactory, or supply your own custom JsonAdapter. This is a potentially dangerous change! In projects using code gen, there are cases where Kotlin classes could have (appeared to) Just Work™️ before if you forgot to annotate them with @JsonClass. These will fail at runtime now. If you're worried about this, I suggest using Moshi 1.9 only in debug builds for a period of time to tease these out before releasing production builds with it.