1<?xml version="1.0" encoding="utf-8"?>
2<selector xmlns:android="http://schemas.android.com/apk/res/android" >
3    <item android:drawable="@drawable/ic_box_unchecked"
4          android:state_checked="false"/>
5    <item android:drawable="@drawable/ic_box_checked"
6          android:state_checked="true"/>
7    <item android:drawable="@drawable/ic_box_unchecked"/>
8</selector>
9