title: Android - Alert dialog doesn't show items
body: <p>Can you explain me why this Dialog won't display items?</p>
  
  <pre><code>new AlertDialog.Builder(MainActivity.context)
                          .setTitle("Gestione topic")
                          .setMessage("Cosa vuoi leggere?")
                          .setItems(R.array.topicChoices, new DialogInterface.OnClickListener() {
                              @Override
                              public void onClick(DialogInterface dialogInterface, int i) {
                                  //code here
                              }
                          }).setNegativeButton("Annulla", new DialogInterface.OnClickListener() {
                      @Override
                      public void onClick(DialogInterface dialogInterface, int i) {
                          dialogInterface.dismiss();
                      }
                  }).show();
  </code></pre>
  
  <p><strong>R.array.topicChoices</strong></p>
  
  <pre><code>&lt;string-array name="topicChoices"&gt;
      &lt;item&gt;Topic non letti&lt;/item&gt;
      &lt;item&gt;Risposte non lette&lt;/item&gt;
  &lt;/string-array&gt;
  </code></pre>
  
  <p>Where is the bug?</p>
  
  <p>Thanks, guys.</p>