设置背景：drawable/inform_item_background.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >

//没有焦点时的图片背景

<item
android:state_window_focused="false"
android:drawable="@drawable/inform_item" />

 

//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/inform_click_item" />

 

//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/inform_click_item" />

 

//选中时的图片背景

<item
android:state_selected="true"
android:drawable="@drawable/inform_click_item"/>

 

//获得焦点时的图片背景

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

</selector>

 

添加背景：android:background="@drawable/inform_item_background"