sample/src/main/res/drawable/list_item_animation_background.xml

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

    <stroke
        android:width="1dp"
        android:color="@android:color/black" />
    <corners android:radius="4dp" />

</shape>