Android Pull解析Xml字符串

1、要解析的xml格式如下：

[html] view plaincopy

1. <UpdateResult NeedUpdate="true">  
2.     <FileUrl value="http://download.note.com/res/6650fd66-551f-47b5-bcd4-0971c391f896"/>  
3.     <CurrentVersion value="0.0.0.1"/>  
4.     <WebSite value="http://note.do.com/"/>  
5. </UpdateResult>  

在解析之前，将该xml赋值给String变量xmlStr

2、解析UpdateResult的属性NeedUpdate，并把结果赋值给isNeedUpdate，解析FileUrl的value属性，并把结果赋值给FileUrl：

[java] view plaincopy

1. XmlPullParser parser = Xml.newPullParser();  
2. parser.setInput(new StringReader(xmlStr));  
3. int event = parser.getEventType();  
4. while (event != XmlPullParser.END_DOCUMENT) {  
5. switch (event) {  
6.     case XmlPullParser.START_DOCUMENT:  
7.         break;  
8.     case XmlPullParser.START_TAG:  
9.         if ("UpdateResult".equals(parser.getName())) {  
10.             int count = parser.getAttributeCount();  
11.             for (int i = 0; i < count; i++) {  
12.                 String key = parser.getAttributeName(i);  
13.                 if ("NeedUpdate".equals(key)) {  
14.                     isNeedUpdate= "true".equals(parser.getAttributeValue(i));  
15.                 }  
16.             }  
17.         } else if ("FileUrl".equals(parser.getName())) {  
18.                 int count = parser.getAttributeCount();  
19.                 for (int i = 0; i < count; i++) {  
20.                     String key = parser.getAttributeName(i);  
21.                     if ("value".equals(key)) {  
22.                         FileUrl = parser.getAttributeValue(i);  
23.                     }  
24.                 }  
25.             }  
26.         break;  
27.     case XmlPullParser.END_TAG:  
28.         break;  
29.     }  
30.     event = parser.next();  
31. }  

主要用到类：org.xmlpull.v1.XmlPullParser和java.io.StringReader

针对实际应用到的一个xml字符串，进行解析，得到item的值。

<?xml version="1.0" encoding="UTF-8" standalone="yes" ?><!DOCTYPE boost_serialization><boost_serialization signature="serialization::archive" version="9"><field class_id="0" tracking_level="0" version="0"><count>1</count><item_version>0</item_version><item class_id="1" tracking_level="0" version="0"><first>streams</first><second>0</second></item></field><RowCount>1</RowCount><rowdata class_id="2" tracking_level="0" version="0"><count>1</count><item_version>0</item_version><item>{"res":{"Stream1":{"ip":"172.16.128.67","name":"20140909_ch0_h","app":"teach_app","vol":1,"type":1,"alias":"\u9ed8\u8ba4\u522b\u540d"},"Stream2":{"ip":"172.16.128.67","name":"20140909_ch1_h","app":"teach_app","vol":0,"type":1,"alias":"\u9ed8\u8ba4\u522b\u540d"},"Stream3":{"ip":"172.16.128.67","name":"20140909_ch2_h","app":"teach_app","vol":0,"type":1,"alias":"\u9ed8\u8ba4\u522b\u540d"},"Stream4":{"ip":"172.16.128.67","name":"20140909_ch3_h","app":"teach_app","vol":0,"type":1,"alias":"\u9ed8\u8ba4\u522b\u540d"}},"mov":{"Stream1":{"ip":"172.16.128.67","name":"20140909_ch4_h","app":"teach_app","vol":0,"type":1,"alias":"\u9ed8\u8ba4\u522b\u540d"}}}</item></rowdata></boost_serialization>

package com.charein.util;import java.io.StringReader;import org.xmlpull.v1.XmlPullParser;import org.xmlpull.v1.XmlPullParserException;import android.util.Log;import android.util.Xml;public class XmlParser {private static String TAG = "XmlParser";private String xmlString;public boolean Parser(String xml) {    XmlPullParser parser = Xml.newPullParser();  try {  parser.setInput(new StringReader(xml));  } catch (XmlPullParserException e) {// TODO Auto-generated catch block  e.printStackTrace();  Log.d(TAG, "XmlPullParserException: " + e);  }    try {  int event = parser.getEventType();  while (event != XmlPullParser.END_DOCUMENT) {  switch (event) {  case XmlPullParser.START_DOCUMENT:  break;  case XmlPullParser.START_TAG:  if ("item".equals(parser.getName())) {  int count = parser.getAttributeCount();  if (count == 0) {  xmlString = parser.nextText();  return true;  }  }  break;  case XmlPullParser.END_TAG:  break;  }  event = parser.next();  }  } catch (Exception e) {// TODO: handle exceptionLog.e(TAG, "Exception: " + e);return false;  }  return false;}public String getXmlString() {return xmlString;}}