JuniorSkills/Session1/app/src/main/java/com/example/session1/BanksActivity.kt

package com.example.session1

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import kotlinx.android.synthetic.main.activity_banks.*
import retrofit2.Call
import retrofit2.Callback
import retrofit2.Response
import retrofit2.Retrofit
import retrofit2.converter.gson.GsonConverterFactory
import java.util.*

class BanksActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_banks)
        val retrofit=Retrofit.Builder()
            .baseUrl("https://www.cbr-xml-daily.ru/")
            .addConverterFactory(GsonConverterFactory.create())
            .build()
        val jsonPlaceHolderApi=retrofit.create(JsonPlaceHolderApi::class.java)
        val call: Call<Valutes> =jsonPlaceHolderApi.course
        call.enqueue(object:Callback<Valutes>{
            override fun onResponse(p0: Call<Valutes>, p1: Response<Valutes>) {

                val course:Valutes=p1.body()
                if (course!=null){
                    data.append(course.Valute.USD.Value)
                }
            }

            override fun onFailure(p0: Call<Valutes>?, p1: Throwable?) {
                data.setText(p1.toString())
            }
        }

        )
    }
}