JSON 数组 Retrofit 并将其显示在回收站视图上 Android Java

Question

我正在尝试执行 @GET 请求，但收到 null 响应。 我熟悉使用以下内容实现响应主体

"billers": [
    {
        "name": "Biller full name",
        "slug": "biller-short-name",
        "fields": {
            "FieldName": {
                "type": "can be textfield, date, selectable or hidden",
                "required": true,
                "placeholder": "This is a field",
                "defaultValue": "value1"
                "regex": "only appears if the type is textfield e.g. ^[-a-zA-Z .]{1,100}$",
                "dateFormat": "only appears if type is date e.g. yyyy-MM-dd",
                "values": [
                    "value1": "only appears if type is selectable",
                    "value2": "value 2"
                ]
            }
        }
]

但这是我第一次实施这样的回应

[
{
    "name": "Category full name",
    "slug": "category-short-name",
    "iconUrl": {
      "android": {
        "xhdpi": "xhdpi category icon url",
        "mdpi": "mdpi category icon url",
        "hdpi": "hdpi category icon url"
      },
      "ios": {
        "3x": "3x biller icon url",
        "retina": "retina biller icon url",
        "nonRetina": "non-retina icon image url"
      }
    }
  }
]

这是我的课程

这是我的错误，我得到一个 200 调用 api，但是当我尝试在 recyclerview 上显示它时，它说响应是 null

Answer 1

您没有显示如何将响应转换为 model。从第二个响应中您可以看到您的响应是PayBillsCategoryModel列表

例如 Gson 你有这样的东西：

data class PayBillsCategoryModel(
    @SerializedName("name ") val name: String? = null,
    @SerializedName("name ") val slug: String? = null,
    @SerializedName("name ") val iconUrl: IconUrl? = null
)


data class IconUrl(
    @SerializedName("android") val android: Android? = null,
    @SerializedName("ios") val ios: Ios? = null
)

data class Android(
    @SerializedName("xhdpi") val xhdpi: String? = null,
    @SerializedName("mdpi") val mdpi: String? = null,
    @SerializedName("hdpi") val hdpi: String? = null,
)

data class Ios(
    @SerializedName("3x") val x3: String? = null,
    @SerializedName("retina") val retina: String? = null,
    @SerializedName("nonRetina") val nonRetina: String? = null
)

所以在拨打 api 后，您的回复是

 data class Response(val payBillsList: ArrayList<PayBillsCategoryModel>)

您需要将此列表传递给您的适配器

adapter.setData(payBillList)