title: Dim or Blur background in activity
body: <p>In one of my project I used <code>PopupWindow</code>. My problem is while viewing popupwindow the design seems to be uncomfortable to work. So I want to dim or blur my activity background. I searched a lot, but most of the answers seems only for <code>Dialog</code> not for <code>PopupWindow</code>. Is it possible in android to dim our activity background while viewing <code>PopupWindaow</code>. </p>