app:tabIndicator="@drawable/tab_indicator"
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android";
android:shape="rectangle">
<item android:gravity="center">
<shape>
<size android:width="20dp"
android:height="4dp"/>
<solid android:color="@android:color/holo_red_light"/>
</shape>
</item>
</layer-list>