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[Gradle 설정]
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id 'kotlin-android-extensions'
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cs |
<MainActivity>
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package com.cookandroid.myapplication
import android.content.Intent
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)
title = "MainActivity"
btnNewActivity.setOnClickListener {
if(btnSecond.isChecked) startActivity(Intent(applicationContext, Second::class.java))
if(btnThird.isChecked) startActivity(Intent(applicationContext, Third::class.java))
}
}
}
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<Second>
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package com.cookandroid.myapplication
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import kotlinx.android.synthetic.main.activity_second.*
class Second : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_second)
title = "Second"
btnReturn.setOnClickListener {
finish()
}
}
}
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<Third>
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package com.cookandroid.myapplication
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import kotlinx.android.synthetic.main.activity_second.*
class Third : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_third)
title = "Third"
btnReturn.setOnClickListener {
finish()
}
}
}
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<activity_main.xml>
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<RadioGroup
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<RadioButton
android:id="@+id/btnSecond"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Second 액티비티"/>
<RadioButton
android:id="@+id/btnThird"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Third 액티비티"/>
</RadioGroup>
<Button
android:id="@+id/btnNewActivity"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="새 화면 열기"/>
</LinearLayout>
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<activity_second.xml>
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00FF00">
<Button
android:id="@+id/btnReturn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="돌아가기"/>
</LinearLayout>
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<activity_third.xml>
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#0000FF">
<Button
android:id="@+id/btnReturn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="돌아가기"/>
</LinearLayout>
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