public abstract class TreeListViewAdapter<T> extends BaseAdapter
{
 protected Context mContext;
 protected List<Node> mAllNodes;
 protected List<Node> mVisibleNodes;
 protected LayoutInflater mInflater;

 protected ListView mTree;

  mTree.setOnItemClickListener(new OnItemClickListener()
  {
   @Override
   public void onItemClick(AdapterView<?> parent, View view,
     int position, long id)
   {
    expandOrCollapse(position);

    if (mListener != null)
    {
     mListener.onClick(mVisibleNodes.get(position), position);
    }

   }

  });

 }

 /**
  * 点击搜索或者展开
  *
  * @param position
  */
 private void expandOrCollapse(int position)
 {
  Node n = mVisibleNodes.get(position);
  if (n != null)
  {
   if (n.isLeaf())
    return;
   n.setExpand(!n.isExpand());
   //  但是我们虽然改变了n 的状态，但是我们的n 并没有在赋值回去，这个时候我们的mAllNodes数据会发生变化么？？
   
   mVisibleNodes = TreeHelper.filterVisibleNodes(mAllNodes);
   notifyDataSetChanged();
  }
 }