<?xml version="1.0" encoding="utf-8" ?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- 默认时的背景图片-->
<item android:drawable="@drawable/pic1" />
<!-- 没有焦点时的背景图片 -->
<item android:state_window_focused="false"
android:drawable="@drawable/pic1" />
<!-- 非触摸模式下获得焦点并单击时的背景图片 -->
<item android:state_focused="true"
android:state_pressed="true"
android:drawable= "@drawable/pic2" />
<!-- 触摸模式下单击时的背景图片-->
<item android:state_focused="false"
android:state_pressed="true"
android:drawable="@drawable/pic3" />
<!--选中时的图片背景-->
<item android:state_selected="true"
android:drawable="@drawable/pic4" />
<!--获得焦点时的图片背景-->
<item android:state_focused="true"
android:drawable="@drawable/pic5" />
</selector>