An xml file for android. It is best used with tall (portrait) elements like navigation drawer backgrounds and overlay on portrait images with RelativeLayouts. I kept it single-filed, you can use @Dimen or @color. See the result in https://pasteboard.co/GAotgJ8.png

glossy_effect_background.xml

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

    <item
        android:bottom="4dp"
        android:left="4dp"
        android:right="4dp"
        android:top="4dp">
        <shape android:shape="rectangle" >
            <corners android:radius="11dp" />
            <gradient
                android:angle="270"
                android:endColor="#55006064"
                android:startColor="#5500ACC1"
                android:type="linear" />
        </shape>
    </item>

    <item
        android:bottom="-200dp"
        android:left="-220dp"
        android:right="50dp"
        android:top="-200dp">
        <shape android:shape="oval" >
            <gradient
                android:endColor="#2200ACC1" />
        </shape>
    </item>

</layer-list>