<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
	<item android:color="@color/black" android:state_checked="true" />
	<item android:color="@color/black" android:state_pressed="true" />
	<item android:color="@color/black" android:state_selected="true" />
	<!--必须放在最后一行，否则上面的效果全都不能用-->
	<item android:color="@color/gray"/>
</selector>