<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <gradient
        android:startColor="?attr/contrastingGradientStartColor"
        android:centerColor="?attr/contrastingGradientCenterColor"
        android:endColor="?attr/contrastingGradientEndColor"/>

</shape>