//pull解析
public void parseXmlWithPull(String xmlData){
        try{
            XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
        XmlPullParser xmlPullParser = factory.newPullParser();
        xmlPullParser.setInput(new StringReader(xmlData));
        int eventType = xmlPullParser.getEventType();
        String name ="";
        String author="";
        String price="";
        
        while(eventType != XmlPullParser.END_DOCUMENT){
            String nodeName = xmlPullParser.getName();
            switch(eventType){
                case XmlPullParser.START_TAG:{
                    if("name".equals(nodeName)){
                        name = xmlPullParser.nextText();
                    }else if("author".equals(nodeName)){
                        author = xmlPullParser.nextText();
                    }else if("price".equals(nodeName)){
                        price = xmlPullParser.nextText();
                    }
                    break;
                }
                
                case XmlPullParser.END_TAG:{
                    if("book".equals(nodeName)){
                        //完成解析
                    }
                    break;
                }
                default:
                    break;
                    
            }
            eventType = xmlPullParser.next();
        }
        }catch(Exception e){
            e.printStackTrace();
    }