Android Application
작성자 임베디드코리아
작성일23-08-27 20:38
조회2,207회
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MainActivity..kt
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class MainActivity : AppCompatActivity() {
private lateinit var text1: TextView
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
//텍스트뷰 초기화
text1 = findViewById(R.id.textView)
//text1 = findViewById<TextView>(R.id.textView);
// print Function
printSum(5104, 1005)
printString("Embedded Korea")
var tot = sumFun(10, 20)
text1.append("return 값 \n")
text1.append("sum + 100 = $tot \n")
// 단일 표현식 함수
text1.append("\n단일 표현식 함수 \n")
var s1=sum(30,60)
text1.append("return 값 : $s1 \n")
var s2=sum(30,220)
text1.append("return 값 : $s2 \n")
}
fun printSum(a: Int, b: Int): Unit {
text1.append("------- printSum -------\n")
text1.append("sum of $a and $b is ${a + b}\n")
text1.append("\n")
}
fun printString(s: String){
text1.append("--- printString ---Unit 생략---\n")
text1.append("$s\n")
text1.append("\n")
}
fun sumFun(a: Int, b: Int): Int {
var sum : Int
sum = a + b
text1.append("** 함수 내에서 출력 ** \n")
text1.append("$a + $b = $sum \n")
return sum+100
}
fun sum(a: Int, b: Int): Int {
return a + b
}
fun sum2(a: Int, b: Int) = a + b
}
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activity_main.xml
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<?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">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>