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