title: Material Design Progress Dialog with transparent background
body: <p>I'd like to put an indeterminate Progress Dialog material-compliant in my app. I found two ways to achieve it:</p>
  
  <p>1- Using material-dialogs: <a href="https://github.com/afollestad/material-dialogs" rel="nofollow noreferrer">https://github.com/afollestad/material-dialogs</a></p>
  
  <p>2- Using the build-in dialogs of material-design-library: <a href="https://github.com/navasmdc/MaterialDesignLibrary#dialog" rel="nofollow noreferrer">https://github.com/navasmdc/MaterialDesignLibrary#dialog</a></p>
  
  <p>Using any of these solutions I get something pretty much like <a href="http://resource.thaicreate.com/upload/tutorial/android-progressbar-when-get-content-from-server-05.jpg?v=1001" rel="nofollow noreferrer">this</a>: a dialog with a progressbar in it.</p>
  
  <p><img src="https://i.stack.imgur.com/5vxKM.jpg" alt="enter image description here"></p>
  
  <p>What I'd like to get is just the circular progress bar, without the surrounding light-grey view and without any text. A lot of apps proved us that the user knows that when something's spinning around he just needs to wait: there's no need to write it in letters. What I mean is pretty much something like <a href="https://i.stack.imgur.com/803yZ.png" rel="nofollow noreferrer">this</a>, but material.</p>
  
  <p><img src="https://i.stack.imgur.com/803yZ.png" alt="enter image description here"></p>
  
  <p>I don't think this is such a strange question (or is it?) but I wasn't able to find any good answer online. Does anyone of you know how to achieve this?</p>
  
  <p>Thank you</p>
  
  <p>[Edit] I must say that in the gitHub issues of the material-dialogs library this seems to be discussed but the developer closes it fast by saying that it would mean not to follow the guidelines: <a href="https://github.com/afollestad/material-dialogs/issues/277" rel="nofollow noreferrer">https://github.com/afollestad/material-dialogs/issues/277</a></p>