解析后台返回的xml文本 ![CDATA[]]形式

今天做项目，与后台交互，发现返回的是xml格式的文本，如下：

<Result><Status><![CDATA[failure]]></Status><Message><![CDATA[The username you entered is incorrect.]]></Message></Result>

那么如何解析这样的格式呢？？？

因为Android官方推荐开发者们使用Pull解析技术，所以就试试它吧！

先随便照着写一个，看看这种pull解析方式的流程：

/**
*
* @file AndroidPullXML.java
* @author Samuel.Cai
* @date Nov 29, 2011
*/
public class AndroidPullXML {

public static void readXML(String resultStr) throws Exception{
readXML(resultStr,"utf-8");
}
public static void readXML(String resultStr,String inputEncoding) throws Exception{
InputStream inputStream = new ByteArrayInputStream(resultStr.getBytes());
readXML(inputStream,inputEncoding);
}
public static void readXML(InputStream inputStream,String inputEncoding) throws Exception{
XmlPullParserFactory pullParserFactory = XmlPullParserFactory.newInstance();
XmlPullParser pullParser = pullParserFactory.newPullParser();

pullParser.setInput(inputStream, inputEncoding);
int eventType = pullParser.getEventType();
LoginResult loginResult = null;
while(eventType != XmlPullParser.END_DOCUMENT){
String nodeName = pullParser.getName();
System.out.println("SA: nodeName = " + nodeName);

eventType = pullParser.next();
}
}
}

结果，logcat打印如下：

11-29 16:16:55.311: I/System.out(588): SA: nodeName = null
11-29 16:16:55.311: I/System.out(588): SA: nodeName = Result
11-29 16:16:55.311: I/System.out(588): SA: nodeName = Status
11-29 16:16:55.311: I/System.out(588): SA: nodeName = null
11-29 16:16:55.311: I/System.out(588): SA: nodeName = Status
11-29 16:16:55.311: I/System.out(588): SA: nodeName = Message
11-29 16:16:55.311: I/System.out(588): SA: nodeName = null
11-29 16:16:55.321: I/System.out(588): SA: nodeName = Message
11-29 16:16:55.321: I/System.out(588): SA: nodeName = Result

发现了问题：

像 <![CDATA[failure]]>这样的东西它直接忽略，认为是null

注：CDATA只表示中间是一段完整的片段,不受一些特殊符号的影响,没别的作用,直接获取Status的值应该就可以了，但是应该如何去取呢？

查阅资料：http://developer.android.com/reference/org/xmlpull/v1/XmlPullParser.html

进行修改实验：

public class AndroidPullXML {

public static void readXML(String resultStr) throws Exception{
readXML(resultStr,"utf-8");
}
public static void readXML(String resultStr,String inputEncoding) throws Exception{
InputStream inputStream = new ByteArrayInputStream(resultStr.getBytes());
readXML(inputStream,inputEncoding);
}
public static void readXML(InputStream inputStream,String inputEncoding) throws Exception{
XmlPullParserFactory pullParserFactory = XmlPullParserFactory.newInstance();
XmlPullParser pullParser = pullParserFactory.newPullParser();

pullParser.setInput(inputStream, inputEncoding);
int eventType = pullParser.getEventType();
LoginResult loginResult = null;
while(eventType != XmlPullParser.END_DOCUMENT){
String nodeName = pullParser.getName();
System.out.println("SA: nodeName = " + nodeName);

// new add..
if(eventType == XmlPullParser.TEXT){
System.out.println("SA: text = " + pullParser.getText());
}

eventType = pullParser.next();
}
}
}

输出结果：－－－－－－

11-29 16:40:17.792: I/System.out(650): SA: nodeName = null
11-29 16:40:17.792: I/System.out(650): SA: nodeName = Result
11-29 16:40:17.792: I/System.out(650): SA: nodeName = Status
11-29 16:40:17.792: I/System.out(650): SA: nodeName = null
11-29 16:40:17.792: I/System.out(650): SA: text = failure
11-29 16:40:17.801: I/System.out(650): SA: nodeName = Status
11-29 16:40:17.801: I/System.out(650): SA: nodeName = Message
11-29 16:40:17.801: I/System.out(650): SA: nodeName = null
11-29 16:40:17.801: I/System.out(650): SA: text = The username you entered is incorrect.
11-29 16:40:17.801: I/System.out(650): SA: nodeName = Message
11-29 16:40:17.801: I/System.out(650): SA: nodeName = Result

总结：pull解析方式，它的eventType有以下几种：
START_DOCUMENT
START_TAG
TEXT
END_TAG
END_DOCUMENT

对于类型为 XmlPullParser.TEXT的 EventType ，你调用 getName()方法只会返回null，因为它不存在什么 “节点名称”

现在开始实际编码：

参考资料：

查阅资料：http://developer.android.com/reference/org/xmlpull/v1/XmlPullParser.html

系列之Android XML解析技术（一）的帖子链接http://www.eoeandroid.com/thread-76224-1-1.html

系列之Android XML解析技术（二）的帖子链接http://www.eoeandroid.com/thread-90596-1-1.html
系列之Android XML解析技术（三）的帖子链接http://www.eoeandroid.com/thread-90600-1-1.html
系列之Android XML解析技术（四）的帖子链接http://www.eoeandroid.com/thread-91326-1-1.html
系列之Android XML解析技术（五）的帖子链接http://www.eoeandroid.com/thread-91332-1-1.html