path: root/app/src/main/res/drawable/background.xml

<?xml version="1.0" encoding="UTF-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="rectangle" android:padding="10dp">
            <solid android:color="#FF212121"/>
            <corners android:radius="10dp"/>
        </shape>
    </item>
</layer-list>