title: AlertDialog and DialogPreference
body: <p>I have this for my alert dialogs, and this works perfect</p>
  
  <pre><code> ContextThemeWrapper ctw = new ContextThemeWrapper( MvcnContactList.this, R.style.MyTheme );
                  alertDialogBuilder = new AlertDialog.Builder(ctw);
  //set some views and onclick listeners
                  alertDialog = alertDialogBuilder.create();
                  alertDialog.setCancelable(false);
                  alertDialog.show();
  </code></pre>
  
  <p>But I have a about preference dialog, and I want this dialog to have the same stile like my alerts dialog. But I do not know hot to apply this style to my dialog</p>
  
  <pre><code>public class About extends DialogPreference {
      public AboutDialog(Context oContext, AttributeSet attrs)
      {
          super(oContext, attrs); 
      }
  }
  </code></pre>
  
  <p>NOTE: I put android:style="@style/impex_dialog" in my pref.xml file, and this style tag it is not recognised.</p>