xStream解析XML问题！


   <item category="3">
      <img src="mediafiles/portrait_pic/ios/0/img-0-6.jpg" des="图片6" />
      <img src="mediafiles/portrait_pic/ios/0/img-0-7.jpg" des="图片7" />
   </item>
       <item category="4">
      <mv id="0000020" title="视频1" src="mediafiles/mv/0000020.mp4" thumbnail ="mediafiles/mv/mv1. jpg "/>
      <mv id="0000021" title="视频2" src="mediafiles/mv/0000021.mp4" thumbnail ="mediafiles/mv/mv2. jpg "/>
      <mv id="0000022" title="视频3" src="mediafiles/mv/0000022.mp4"  thumbnail ="mediafiles/mv/mv3. jpg "/>
       </item>怎么获取item下不同的节点呢？我用的事xStreamxml