Get network information by OkHttp

kotlin_okhttp.kt

package app.ruyut.test.okhttp

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import okhttp3.OkHttpClient
import okhttp3.Request

class MainActivity : AppCompatActivity() {
    private val TAG: String = MainActivity::class.java.simpleName
    private val url: String = "https://data.ntpc.gov.tw/api/datasets/28AB4122-60E1-4065-98E5-ABCCB69AACA6/json/preview"
    //讀取的url，以政府資料開放平台中的新北市垃圾車為例

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        var client = OkHttpClient.Builder().build()
        var request = Request.Builder()
                .url(url)
                .build()
        CoroutineScope(Dispatchers.IO).launch {
            var response = client.newCall(request).execute()
            response.body?.run{
                Log.d(TAG, "onCreate: ${string()}")
            }
        }
    }
}
//Android8以上預設不能使用http開頭的網址，建議使用https

//需要在AndroidManifest.xml中加入網路權限聲明
//<uses-permission android:name="android.permission.INTERNET"/>

//需要在build.gradle(Module:app)中加入OkHttp函式庫
//implementation "com.squareup.okhttp3:okhttp:4.9.0"