【ANDROID STUDIO】 View Data Retrofit With Kotlin Coroutines

 package com.example.myapplication

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.lifecycle.LiveData
import androidx.lifecycle.Observer
import androidx.lifecycle.liveData
import kotlinx.android.synthetic.main.activity_main.*
import retrofit2.Response

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val retService = RetrofitInstance
            .getRetrofitInstance()
            .create(AlbumService::class.java)
        val responseLiveData: LiveData<Response<Albums>> = liveData {
            val response = retService.getAlbums()
            emit(response)
        }
        responseLiveData.observe(this, Observer {
            val albumsList = it.body()?.listIterator()
            if (albumsList != null) {
                while (albumsList.hasNext()) {
                    val albumsItem = albumsList.next()
                    val result = " " + "Album Title : ${albumsItem.title}" + "\n" +
                            " " + "Album id : ${albumsItem.id}" + "\n" +
                            " " + "User id : ${albumsItem.userId}" + "\n\n\n"
                    text_view.append(result)
                }
            }
        })

    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ScrollView
        android:id="@+id/ScrollView2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="1.0">

        <TextView
            android:id="@+id/text_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="TextView"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    </ScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>