Android border bottom drawable for some view (list item for example)
<?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="#8a000000" />
</shape>
</item>
<item android:bottom="1dp">
<shape android:shape="rectangle">
<solid android:color="@android:color/darker_gray" />
</shape>
</item>
</layer-list>