<?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"> <item android:state_selected="true" android:drawable="@drawable/abc_tab_indicator_mtrl_alpha"/> <item android:drawable="@android:color/transparent"/> </selector>Download file