혀가 길지 않은 개발자

activity_main.xml MyAsyncTask.kt package com.jwsoft.kotlinproject import android.os.AsyncTask import android.widget.TextView import java.lang.Exception class MyAsyncTask(var tvText: TextView) : AsyncTask() { override fun onPreExecute() { super.onPreExecute() } override fun doInBackground(vararg params: Void?): Boolean { for (i in 1..50) { try { Thread.sleep(5) } catch (e: Exception) { e.printSta..

activity_main.xml android:textAllCaps="false" 대소문자 구분 (CHANGE -> Change) MainActivity.kt package com.jwsoft.kotlinproject import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import kotlinx.android.synthetic.main.activity_main.* class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.l..

build.gradle (Module: app) dependencies { // Retrofit2 implementation 'com.squareup.retrofit2:retrofit:2.7.1' implementation 'com.squareup.retrofit2:converter-gson:2.7.1' implementation 'com.squareup.okhttp3:logging-interceptor:4.3.1' } AndroidManifast.xml 인터넷 권한 추가. RetrofitAPI.kt package com.jwsoft.kotlinproject import com.google.gson.JsonObject import retrofit2.Call import retrofit2.http.GET ..

activity_main.xml MainActivity.kt package com.jwsoft.kotlinproject import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import kotlinx.android.synthetic.main.activity_main.* class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) btnChange.setOnClickListener { Thr..

UI 작업은 Main Thread에서 해야 하는데 만약 Worker Thread에서 UI 변경을 해야 한다면 Handler를 이용하여 Main Thread와 연결해 주어야 한다. 단, Handler는 Main Thread에서 생성이 되어야 한다. activity_main.xml MainActivity.kt package com.jwsoft.kotlinproject import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.os.Handler import android.os.Message import kotlinx.android.synthetic.main.activity_main.* class MainActi..