<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@color/red" android:state_pressed="false"></item>
<item android:drawable="@color/blue" android:state_pressed="true"></item>
</selector>
<resources>
<color name="red">#990000</color>
<color name="blue">#000099</color>
</resources
android:background="@drawable/button_selector" >
//第二种
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<color android:color="#0f0"/>
</item>
</selector>