Selected Listener in Button and Listview Background color

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

    <item android:drawable="@drawable/btn_pressed"
          android:state_focused="true"
          android:state_pressed="true"></item>
    <item android:drawable="@drawable/btn_default"
          android:state_focused="true"
          android:state_pressed="false"></item>
    <item android:drawable="@drawable/btn_pressed"
          android:state_focused="false"
          android:state_pressed="true"></item>
    <item android:drawable="@drawable/btn_default"></item>

</selector>