如何使用带有 RxJava 的 Retrofit GET 方法获得以下响应

Question

{"success":true,"rates": {"AT": {"country_name":"Austria","standard_rate":20,"reduced_rates": {"domestic flights":13,"entrance to sporting events":13,"admissions to cultural events and amusement parks":13,"firewood":13,"agricultural supplies":13}},"BE": {"country_name":"Belgium","standard_rate":21,"reduced_rates": {"some foodstuffs":12,"certain agricultural supplies":12,"social housing":12}}}}

I tried,

@GET("rate_list")
fun getValidCountries(
    @Query("access_key") accessKey: String,
) : Single<Response<JsonElement>>

But getting error like,

Cannot construct instance of com.google.gson.JsonElement (no Creators, like default construct, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information at [Source: (okhttp3.ResponseBody$BomAwareReader); line: 1, column: 1]

How to solve this, also i'm using RxJava to call API.

Answer 1

In your code swap

@GET("rate_list")
fun getValidCountries(@Query("access_key") accessKey: String) : Single<Response<JsonElement>>

With this

@GET("rate_list")
fun getValidCountries(@Query("access_key") accessKey: String) : Single<ValidCountries>

Use this to create data classes for your JSON. And rename the class named Json4Kotlin_Base to ValidCountrie(s)

ALso, you don't need Response use catch to catch any HttpException .