[Android] 08강. 버튼 이미지 애니메이션(Image Button)

package com.example.kbw.a8;
 
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
 
public class MainActivity extends AppCompatActivity {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/click" android:state_pressed="true"></item>
    <item android:drawable="@drawable/hover" android:state_hovered="true"></item>
    <item android:drawable="@drawable/normal" android:state_focused="true"></item>
</selector>
    <!--1. 버튼이 press (click)
        2. 마우스가 focus (hover)
        3. normal-->

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="com.example.kbw.a8.MainActivity">
 
    <ImageButton
        android:id="@+id/imageButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:background="@drawable/normal"
        app:srcCompat="@drawable/button1"
        tools:layout_editor_absoluteX="157dp"
        tools:layout_editor_absoluteY="68dp" />
</RelativeLayout>