Document解析xml遇到的问题~~ - 移动平台 / Android

XML文件内容：
- <ResList>
  <page>0</page> 
- <resItem>
  <resName>WWW</resName> 
  </resItem>
- <resItem>
  <resName>DDD</resName> 
  </resItem>
</ResList>


解析方法：
public void parseData(){
videoInfo = new LiveVideoInfo();
Element root = mDocument.getDocumentElement();

NodeList page = root.getElementsByTagName("page");
videoInfo.setCurrentPage(Integer.parseInt(page.item(0).getFirstChild().getNodeValue()));

NodeList resItem = root.getElementsByTagName("resItem");
Log.v("LiveVideoXmlParserByDom", ""+resItem.getLength());

for(int i=0;i<resItem.getLength();i++){
video = new LiveVideo();

  Node itemNode = resItem.item(i);
//NodeList itemList = itemNode.getOwnerDocument().getDocumentElement();
Element root1= itemNode.getOwnerDocument().getDocumentElement();
NodeList resNameNode = root1.getElementsByTagName("resName");
if(resNameNode.item(0).getFirstChild()!=null)
video.setResName(resNameNode.item(0).getFirstChild().getNodeValue());

if(BaseData.DEBUG) Log.v("VideoAdapter",""+video.getResName());
video=null;
}
问题：res