strings.xml

strings.xml

<resources>
    <string name="app_name">혀가 길지 않은 개발자 KotlinProject</string>

    <string name="name">James Kim</string>
    <string name="nickname">혀가 길지 않은 개발자</string>
</resources>

 

 

 

 

 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/tvName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/name"
        android:textSize="30dp"
        android:textStyle="bold|italic"/>

    <Button
        android:id="@+id/btnChange"
        android:layout_width="200dp"
        android:layout_height="70dp"
        android:textAllCaps="false"
        android:text="change"
        android:textSize="20dp"
        android:layout_marginTop="10dp" />

</LinearLayout>

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 {
            if (tvName.text == getString(R.string.nickname)) {
                tvName.text = getString(R.string.name)
            } else {
                tvName.text = getString(R.string.nickname)
            }
        }
    }

}

실행 결과