[Android]自定义checkbox

<?xml version="1.0" encoding="utf-8" ?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/usercenter_delete_havor" android:state_checked="true" />
    <item android:drawable="@drawable/usercenter_delete_default" android:state_checked="false" />
    <item android:drawable="@drawable/usercenter_delete_default" />
</selector>

<style name="VideoDownloadCheckbox" parent="@android:style/Widget.CompoundButton.CheckBox">
    <item name="android:button">@null</item>
    <item name="android:background">@drawable/usercenter_delete_selector</item>
</style>

<CheckBox
    android:layout_width="25dp"
    android:layout_height="25dp"
    style="@style/VideoDownloadCheckbox" />