edit_text.xml

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

    <item
        android:left="2dp"
        android:top="2dp">

        <shape android:shape="rectangle" >

            <gradient
                android:angle="270"
                android:endColor="#0F000000"
                android:startColor="#0F000000" />

            <corners
                android:bottomLeftRadius="6dip"
                android:bottomRightRadius="6dip"
                android:topLeftRadius="6dip"
                android:topRightRadius="6dip" />

        </shape>

    </item>

    <item
        android:bottom="3dp"
        android:right="3dp">
        <shape android:shape="rectangle" >

            <gradient
                android:angle="270"
                android:endColor="#FFFFFF"
                android:startColor="#FFFFFF" />

            <corners
                android:bottomLeftRadius="6dip"
                android:bottomRightRadius="6dip"
                android:topLeftRadius="6dip"
                android:topRightRadius="6dip" />
        </shape>
    </item>

</layer-list>