title: onLongClickListener never get trigered
body: <p>I have a custom listView defined like this</p>
  
  <pre><code>public class DDListView extends ListView implements OnScrollChangedListener {
  </code></pre>
  
  <p>than I make an instance of it with name mExampleList I set onLongClickListener but it never get called, where is my problem ?</p>
  
  <pre><code>mExampleList.setOnLongClickListener(new OnLongClickListener() {
  
          public boolean onLongClick(View v) {
              // TODO Auto-generated method stub
              Log.v("vvv", "sdfsdf");
              return false;
          }
      });
  </code></pre>