title: Use Holo theme only for dialogs
body: <p>It is possible to use Holo theme only for dialogs?</p>
  
  <p>I declared the app theme with Theme.Black.NoTitleBar in the manifest, and every time I want to instantiate a dialog (ProgressDialog for example) I use</p>
  
  <pre><code>new ProgressDialog(this, R.style.default_system_theme);
  </code></pre>
  
  <p>This style is declared in two xml files, based on the android version: one with the holo theme and the other one with the old theme.</p>
  
  <p>The theme is actually applied, but here is the result.</p>
  
  <p><img src="https://i.stack.imgur.com/SyNQQ.png" alt="enter image description here"></p>
  
  <p>As you can see, the background is not transparent and the dialog is shown at the top of the screen.</p>
  
  <p>Where am I wrong?
  Thank you in advance.</p>
  
  <p><strong>EDIT</strong></p>
  
  <p>Setting the R.style.default_system_theme property with Theme.Holo.Dialog and Theme.dialog ( depending on android version) here is the result.</p>
  
  <p><img src="https://i.stack.imgur.com/9v1hv.png" alt="enter image description here"></p>
  
  <p>There is still the background even if it doesn't fill up the entire screen. Ho can I get rid of it?</p>