title: Show multiple selections in AlertBuilder created as SingleChoiceItem list
body: <p>I'm using a alert dialog created with the alertBuilder &amp; setSingleChoiceItems to assign a single choice value to a selected entry in a list of data entries.  This works well for a single selection, where the old value is used to set the selection when creating the dialog and the new value is picked up when the user clicks, i.e:</p>
  
  <pre><code>builder.setSingleChoiceItems(items, currentLevel, new DialogInterface.OnClickListener() {
       public void onClick(DialogInterface dialog, int newLevel) {
              if (newLevel == currentLevel) {
                  // no change
              } else {
                  updateLevel(alertId,newLevel);
              }
              dialog.cancel();
          }
  });
  </code></pre>
  
  <p>Now I'd like to extend this to multiple selections of data elements, which means that there could be several different current levels, so when building the dialog I should be able to select multiple entries, but only a single choice is possible on click (which will replace all the initial multiple selections).   I still would like to have the radio buttons  (unlike the check boxes that I would get by using the setMultipleChoiceItems).</p>
  
  <p>Any tips how to implement this ?  Do I need to create my custom view  or is there a way to set the AlertBuilder to support this ?</p>