我正在尝试使用协程将Json解析为MVVM中的Recyclerview来学习MVVM体系结构。但是我在BlogRepository类上遇到错误。

我的Json文件如下所示：

[
  {
    "id": 1,"name": "potter","img": "https://images.example.com/potter.jpg"
},{ …}
]

我已经创建了如下数据类：

@JsonClass(generateAdapter = true)
class ABCCharacters (

    @Json(name = "id") val char_id: Int,@Json(name = "name") val name: String? = null,@Json(name = "img") val img: String
)

然后如下所示的RestApiService：

interface RestApiService {

    @GET("/api")
    fun getPopularBlog(): Deferred<List<ABCCharacters>>

    companion object {

        fun createCorService(): RestApiService {

            val okHttpClient = OkHttpClient.Builder()
                .connectTimeout(1,TimeUnit.MINUTES)
                .readTimeout(30,TimeUnit.SECONDS)
                .writeTimeout(15,TimeUnit.SECONDS)
                .build()

            return Retrofit.Builder()
                .baseUrl("https://example.com")
                .addConverterFactory(moshiConverterFactory.create())
                .client(okHttpClient)
                .addCallAdapterFactory(CoroutineCallAdapterFactory())
                .build().create(RestApiService::class.java)
        }
    }
}

BlogReposity.kt

class BlogRepository() {

    private var character = mutableListOf<ABCCharacters>()
    private var mutableLiveData = MutableLiveData<List<ABCCharacters>>()
    val completableJob = Job()
    private val coroutinescope = Coroutinescope(Dispatchers.IO + completableJob)

    private val thisApiCorService by lazy {
        RestApiService.createCorService()
    }

    fun getMutableLiveData():MutableLiveData<List<ABCCharacters>> {
        coroutinescope.launch {
            val request = thisApiCorService.getPopularBlog()
            withContext(Dispatchers.Main) {
                try {

                    val response = request.await()
                    val mBlogWrapper = response;
                    if (mBlogWrapper != null && mBlogWrapper.name != null) {
                        character = mBlogWrapper.name as MutableList<ABCCharacters>
                        mutableLiveData.value=character;
                    }

                } catch (e: HttpException) {
                    // Log exception //

                } catch (e: Throwable) {
                    // Log error //)
                }
            }
        }
        return mutableLiveData;
    }
}

最后是ViewModel类

class MainViewModel() : ViewModel() {

    val characterRepository= BlogRepository()
    val allBlog: LiveData<List<ABCCharacters>> get() = characterRepository.getMutableLiveData()

    override fun onCleared() {
        super.onCleared()
        characterRepository.completableJob.cancel()
    }
}

我是根据https://itnext.io/kotlin-wrapping-your-head-around-livedata-mutablelivedata-coroutine-networking-and-viewmodel-b552c3a74eec完成此操作的 有人可以指导我哪里出问题了以及如何解决？