title: AlertDialog does not show dividers on a list
body: <p>I have this class:</p>
  
  <pre><code>public class PageDetailInfoView extends FrameLayout {
  
  //few constructors and methods
  
  //method to show an AlertDialog with a list
  private void openDialog(){
  
      List&lt;String&gt; mTags = new ArrayList&lt;String&gt;();
      mTags.add("Item1");
      mTags.add("Item2");
      mTags.add("Item3");
      mTags.add("Item4");
      mTags.add("Item5");
      mTags.add("Item6");
  
      final CharSequence[] tags = mTags.toArray(new String[mTags.size()]);
      AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
      builder.setTitle("Title");
      builder.setItems(tags, new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int item) {
          //do something
          }
      });
  
      Dialog alertDialogObject = builder.create();
      alertDialogObject.show();
  
  
  }
  </code></pre>
  
  <p>The Alert dialog is opened after invoke openDialog() but the thing is that it does not exhibit the dividers between items.
  I would like to get this:<br>
  <a href="http://2.bp.blogspot.com/-i00d8VG6WsQ/UrGIeyb-8II/AAAAAAAAHwA/8MPWP5qrQ78/s500/alertdialog-with-simple-listview.png" rel="noreferrer">http://2.bp.blogspot.com/-i00d8VG6WsQ/UrGIeyb-8II/AAAAAAAAHwA/8MPWP5qrQ78/s500/alertdialog-with-simple-listview.png</a></p>
  
  <p>and ,in fact, I get it but without the Gray dividers.<br>
   Any idea about why?</p>
  
  <p><a href="https://i.stack.imgur.com/zKkzk.png" rel="noreferrer"><img src="https://i.stack.imgur.com/zKkzk.png" alt="enter image description here"></a></p>