here is the solution with the same drawable
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<solid android:color="@android:color/transparent" />
<corners android:radius="3dp"/>
<stroke android:width="1dip" android:color="#e2e2e2"/>
</shape>
I needed just to specify solid color :
<solid android:color="@android:color/transparent" />