Fast campus 안드로이드 앱 개발 프로젝트 HelloWorld 예제

activity_main.xml

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
   android:paddingLeft="@dimen/activity_horizontal_margin"
   android:paddingRight="@dimen/activity_horizontal_margin"
   android:paddingTop="@dimen/activity_vertical_margin"
   tools:context="kr.mindwing.helloworld.MainActivity">

   <TextView
       android:id="@+id/hello_world"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:text="Hello World!"
       android:textSize="50sp" />

   <Button
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:layout_below="@id/hello_world"
       android:onClick="changeText"
       android:text="change text" />
</RelativeLayout>