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>
