创建实体bean类：
package com.example.xmltest.entity;
public class Person {
private Integer id;
private String name;
private Integer age;
public Person() {
super();
}
public Person(Integer id,String name,Integer age) {
super();
this.id = id;
this.name = name;
this.age = age;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "Person [id=" + id + ",name=" + name + ",age=" + age + "]";
}
}
序列化和解析的方法：
package com.example.xmltest.utils;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlSerializer;
import android.util.Log;
import android.util.Xml;
import com.example.xmltest.entity.Person;
public class XmlUtils {
private static final String TAG = "XmlUtils";
/**
*
* 将数据以xml形式写入到本地
*
* @throws Exception
*/
public void writeToLocal() throws Exception {
List<Person> personList = new ArrayList<Person>();
for (int i = 0; i < 30; i++) {
personList.add(new Person(i,"王" + i,20 + i));
}
XmlSerializer serializer = Xml.newSerializer();// 创建 XmlSerializer对象
FileOutputStream fos = new FileOutputStream("/mnt/sdcard/person.xml");
// 指定序列化对象输出的流
serializer.setOutput(fos,"utf-8");
// 写xml的头
serializer.startDocument("utf-8",true);// true为yes-----> xml文件中无DTD约束。
// 开始的根节点
serializer.startTag(null,"persons");
for (Person person : personList) {
serializer.startTag(null,"person");
serializer.attribute(null,"id",String.valueOf(person.getId()));
// 写人的姓名
serializer.startTag(null,"name");
serializer.text(person.getName());
serializer.endTag(null,"name");
// 写人的年龄
serializer.startTag(null,"age");
serializer.text(String.valueOf(person.getAge()));
serializer.endTag(null,"age");
serializer.endTag(null,"person");
}
serializer.endTag(null,"persons");// 不用写“/”
// 标记xml文件输出完毕
serializer.endDocument();
}
/**
*
* 从本地解析xml数据
*
* @throws Exception
*
*
*/
public void parserXmlFromLocal() throws Exception {
// 创建pull解析器对象
XmlPullParser parser = Xml.newPullParser();
// 指定解析的文件
FileInputStream fis = new FileInputStream("/mnt/sdcard/person.xml");
parser.setInput(fis,"UTF-8");
int eventType = parser.getEventType();// 获得解析器的第一个事件类型
List<Person> personList = null;
Person person = null;
String name;
String tagName = parser.getName();
while (eventType != XmlPullParser.END_DOCUMENT) {// 如果事件类型不等于结束的类型，继续循环
// 解析数据
switch (eventType) {
case XmlPullParser.START_TAG:// 代表开始节点<persons>
if ("persons".equals(tagName)) {
// 初始化集合
personList = new ArrayList<Person>();
} else if ("person".equals(tagName)) {
person = new Person();
person.setId(Integer.valueOf(parser.getAttributeValue(null,"id")));
} else if ("name".equals(tagName)) {
name = parser.nextText(); // 当前是<name>节点
// nextText是取<name>后边的值
person.setName(name);
} else if ("age".equals(tagName)) {
person.setAge(Integer.parseInt(parser.nextText()));
}
break;
case XmlPullParser.END_TAG: // 代表结束节点</person>
if ("person".equals(tagName)) {// 当前是</person>
// 把上面person的对象添加到对象中
personList.add(person);
}
break;
default:
break;
}
eventType = parser.next();// 赋值下一个事件类型
}
if (personList != null) {
for (Person p : personList) {
Log.i(TAG,p.toString());
System.out.println(p.toString());
}
}
}
}
测试的方法：
package com.example.xmltest.utils;
import android.test.AndroidTestCase;
public class TestCase extends AndroidTestCase {
public void test() throws Exception{
XmlUtils xmlUtils = new XmlUtils();
xmlUtils.writeToLocal();
xmlUtils.parserXmlFromLocal();
}
}
因为用到测试方法，所以需要引入测试框架，另外需要假如写sd卡的权限。
