title: Android: create a dialog with transparent background, no border and shade
body: <p>I want to create a dialog with transparent BG and no border.
  For this I use android.R.style.Theme_Translucent_NoTitleBar.</p>
  
  <p>But in the dialog I have UI componenets - imageview and edittext.</p>
  
  <p>I want these to create a shade over the activity page. Like the regular dialog is doing.</p>
  
  <p>Any ideas how?</p>