DBILITY

package com.example.myex01 import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import com.example.myex01.databinding.ActivityMain4Binding class MainActivity4 : AppCompatActivity() { private val binding by lazy { ActivityMain4Binding.inflate(layoutInflater) } override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(binding.root) v..

package com.example.myex01 import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.util.Log import android.view.View import android.widget.CheckBox import android.widget.SeekBar import androidx.core.view.children import androidx.core.widget.addTextChangedListener import com.example.myex01.databinding.ActivityMain3Binding import kotlin.concurrent.thread class MainA..

package com.example.myex01 import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.util.Log import android.widget.CheckBox import androidx.core.view.children import androidx.core.widget.addTextChangedListener import com.example.myex01.databinding.ActivityMain3Binding class MainActivity3 : AppCompatActivity() { private lateinit var binding: ActivityMain3Binding ove..

build.gradle.kts에서 viewBinding을 다음과 같이 활성화 buildFeatures { viewBinding = true } onActivityResult는 Deprecated되었다.registerForActivityResult를 사용해야 하는데 Activity 실행(?)에는 ActivityResultContracts.StartActivityForResult()를 사용한다.물론 callback은 lambda로 class MainActivity : AppCompatActivity() { private val binding by lazy { ActivityMainBinding.inflate(layoutInflater) } private val formatter = SimpleDateForm..

radio button은 radio group안에 넣어야 한다. radioGroup에 checkedChangeListener를 구현해주면 된다. class MainActivity : AppCompatActivity() { private lateinit var binding: ActivityMainBinding override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding = ActivityMain4inding.inflate(layoutInflater) setContentView(binding.root) binding.run { radioGroup.setOnCheckedChangeListener {..