android - How to import "xmlns:app="http....pk/res-auto" in xml automatically? or How to creat a template xml which includes this "xmlns:app" scheme? - Stack Overflow
기초 정리] xmlns:android, xmlns:app, xmlns:tools : 네이버 블로그
07-23 LinearLayout 예제
Kotlin SMS tutorial: Hello world
Solved <button> 28 16 17 public class Timer Service | Chegg.com