android statelistdrawable基本设置

在drawable文件夹里，创建：<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true" android:drawable="@drawable/checked"/>

<item android:state_focused="true" android:drawable="@drawable/focus"/>

<item android:state_pressed="true" android:drawable="@drawable/pressed"/>

</selector>