<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:aapt="http://schemas.android.com/aapt"> <item android:state_checked="true" android:drawable="@drawable/abc_btn_radio_to_on_mtrl_015"/> <item android:drawable="@drawable/abc_btn_radio_to_on_mtrl_000"/> </selector>Download file