Android Studio: OkHttp の使い方

設定

AndroidManifest.xml

（省略）
<uses-permission android:name="android.permission.INTERNET" />
（省略）

build.gradele.kts(Module app)

（省略）
dependencies {
implementation("com.squareup.okhttp3:okhttp:4.10.0")
（省略）

プログラム

MainActivity.kt

package com.example.okhttp01

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import android.util.Log

import okhttp3.*
import java.io.IOException
import java.lang.Thread.currentThread

class MainActivity : AppCompatActivity() {

    val client = OkHttpClient()

    override fun onCreate(savedInstanceState: Bundle?) {
        println("*** check *** aaa ***")
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        println("*** check *** ccc ***")

     //   var url_aa = "https://toridge.com/params.php"
     //   var url_aa="https://httpbin.org/get"
        var url_aa = "https://ekzemplaro.org/storytelling/repertoire/others.json"
        run(url_aa)
    }

    fun run(url: String) {
        println("*** run *** ddd ***")
        val request = Request.Builder()
            .url(url)
            .build()
        Log.i("toridge.okhttp3.run()", "Thread is " + currentThread().name) // Thread is main

        client.newCall(request).enqueue(object : Callback {

            override fun onFailure(call: Call, e: IOException) {}

            override fun onResponse(call: Call, response: Response) {
                println("*** onResponse *** fff ***")
                val request = Request.Builder()
                println(response.body!!.string())
                println("*** onResponse *** hhh ***")

            }
        })
    }
}

実行結果

View -> Tool Windows -> Logcat