kotlin 改造预期 begin_array 但在第 1 行是 begin_object

Question

我试图创建一个应用程序，其本质是通过按一个按钮，显示我的api中的作者和标题，但是它给出了一个错误预期的begin_array但在第1行是begin_object，我尝试了一切，没有有效，有什么问题

MainActivity.kt：

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    btn.setOnClickListener {
        sendNetworkRequest()
    }
}
fun sendNetworkRequest(){
    val builder = Retrofit.Builder()
        .baseUrl("http://newsapi.org/v2/")
        .addConverterFactory(GsonConverterFactory.create())
    val retrofit = builder.build()
    val apiInterface: ApiInterface = retrofit.create<ApiInterface>(ApiInterface::class.java)
    val call: retrofit2.Call<UrlImageModel> = apiInterface.getFile()
    call.enqueue(object : Callback<UrlImageModel>{
        override fun onFailure(call: retrofit2.Call<UrlImageModel>, t: Throwable) {
            Log.i("LOL",t.message.toString())
        }
        override fun onResponse(call: retrofit2.Call<UrlImageModel>, response: Response<UrlImageModel>) {
            val statusResponse = response.body()!!
                        result.text = result.text.toString() + '\n' + statusResponse.status


        }
    })
}

ApiInterface.kt：

interface ApiInterface {
@GET("everything?q=bitcoin&from=2020-09-12&sortBy=publishedAt&apiKey=1d4f4f812b0b458890db5757fa0d8ce0")
fun getFile(): Call<UrlImageModel>

}

UrlImageModel.kt

class UrlImageModel {
@SerializedName("status")
@Expose
var status: String? = null
@SerializedName("totalResults")
@Expose
var totalResult: String? = null
@SerializedName("articles")
@Expose
var articles = ArrayList<Articles>()

}

class Articles{
@Expose
@SerializedName("source")
var source = ArrayList<Source>()
@SerializedName("author")
@Expose
var author: String? = null
@SerializedName("title")
@Expose
var title: String? = null
@SerializedName("description")
@Expose
var description: String? = null
@SerializedName("url")
@Expose
var url: String? = null
@SerializedName("urlToImage")
@Expose
var urlToImage: String? = null
@SerializedName("publishedAt")
@Expose
var publishedAt: String? = null
@SerializedName("content")
@Expose
var content: String? = null

}

class Source{
@SerializedName("id")
@Expose
var id: String? = null
@SerializedName("name")
@Expose
var name: String? = null

}

来自我的 API 的 JSON（不是全部） enter image description here

Answer 1

此错误是因为您在 Articles 模型类中将 source 声明为 Arraylist。但在实际响应中，它是作为一个对象来的。

所以只需修改您的 Articles 类。

替换这些行

@Expose
@SerializedName("source")
var source = ArrayList<Source>()

这些

@Expose
@SerializedName("source")
var source :Source? = null
//or
var source = Source()

Answer 2

尝试将 Articles Class 更改为此：

class Articles{
    @Expose
    @SerializedName("source")
    var source = Source()
    @SerializedName("author")
    @Expose
    var author: String? = null
    @SerializedName("title")
    @Expose
    var title: String? = null
    @SerializedName("description")
    @Expose
    var description: String? = null
    @SerializedName("url")
    @Expose
    var url: String? = null
    @SerializedName("urlToImage")
    @Expose
    var urlToImage: String? = null
    @SerializedName("publishedAt")
    @Expose
    var publishedAt: String? = null
    @SerializedName("content")
    @Expose
    var content: String? = null