skyline/app/src/main/res/drawable/ic_rectangular_button.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="rectangle">
            <solid android:color="#50FFFFFF" />
            <stroke
                    android:width="2dp"
                    android:color="#A0FFFFFF" />
            <size
                    android:width="25dp"
                    android:height="25dp" />
            <corners android:radius="10dp" />
        </shape>
    </item>
</layer-list>