code: public void setOnItemClickListener(AdapterView.OnItemClickListener l) {
          if(mAutoCompleteMode == AUTOCOMPLETE_MODE_NONE)
              return;
          ((AutoCompleteTextView)mInputView).setOnItemClickListener(l);
      }
docs: <p>Sets the listener that will be notified when the user clicks an item
  in the drop down list.</p>
  <p>Only work when autoComplete mode is {@link #AUTOCOMPLETE_MODE_SINGLE} or {@link #AUTOCOMPLETE_MODE_MULTI}</p>
  
  @param l the item click listener