我试图检索行数，但遇到这个错误，下面是我的API链接https://thecodecafe.in/gogrocer-ver2.0/API/top_selling
import com.squareup.moshi.Moshi
import com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterFactory
import retrofit2.Call
import retrofit2.Retrofit
import retrofit2.converter.moshi.MoshiConverterFactory
import retrofit2.http.GET
private const val BASE_URL = "https://thecodecafe.in/gogrocer-ver2.0/api/"
val moshi = Moshi.Builder()
.add(KotlinJsonAdapterFactory())
.build()
val retrofit = Retrofit.Builder()
.addConverterFactory(MoshiConverterFactory.create(moshi))
.baseUrl(BASE_URL)
.build()
interface GroceryApiServices {
@GET("top_selling")
fun getProperties():
Call<List<GroceryProperty>>
}
object GroceryApi {
val retrofitServices: GroceryApiServices by lazy { retrofit.create(GroceryApiServices::class.java)}
}
这就是我想要在视图模型类中检索数据的方式
import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.ViewModel
import com.kotlin_developer.grocerysell.network.GroceryApi
import com.kotlin_developer.grocerysell.network.GroceryProperty
import retrofit2.Call
import retrofit2.Callback
import retrofit2.Response
class OverviewViewModel: ViewModel() {
private val _response = MutableLiveData<String>()
val response: LiveData<String>
get() = _response
init {
getGroceryProperties()
}
private fun getGroceryProperties(){
GroceryApi.retrofitServices.getProperties().enqueue(object : Callback<List<GroceryProperty>>{
override fun onFailure(call: Call<List<GroceryProperty>>, t: Throwable) {
_response.value = t.message
}
override fun onResponse(
call: Call<List<GroceryProperty>>,
response: Response<List<GroceryProperty>>
) {
_response.value="Success ${response.body()?.size} Grocery Property arrived"
}
})
}
override fun onCleared() {
super.onCleared()
}
}
