Android XML解析之Pull

转自：http://telecom.chinaitlab.com/ydkf/872500.html

Pull解析XML文档；

首先建一个android项目，在cn.class3g.service里建一个名为person_list,xml：

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<?xml version="1.0" encoding="UTF-8"?>
<persons>
    <person id="111">
        <name>Tom</name>
        <age>20</age>
    </person>
    <person id="222">
        <name>Mary</name>
        <age>17</age>
    </person>
</persons>

<?xml version="1.0" encoding="UTF-8"?> <persons> <person id="111"> <name>Tom</name> <age>20</age> </person> <person id="222"> <name>Mary</name> <age>17</age> </person> </persons>
在cn.class3g.domain包下封装javabean，person：

 

 

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package cn.class3g.domain;

public class Person {
    private int id;
    private String name;
    private int age;

    public Person() {
    }

    public Person(int id, String name, int age) {
        super();
        this.id = id;
        this.name = name;
        this.age = age;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String toString() {
        return "Person [id=" + id + ", name=" + name + ", age=" + age + "]";
    }

}

package cn.class3g.domain; public class Person { private int id; private String name; private int age; public Person() { } public Person(int id, String name, int age) { super(); this.id = id; this.name = name; this.age = age; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String toString() { return "Person [id=" + id + ", name=" + name + ", age=" + age + "]"; } }
在service包下创建PersonHandler类：

 

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<pre name="code" class="html">package cn.class3g.service;

import java.io.InputStream;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlSerializer;

import android.util.Xml;

import cn.class3g.domain.Person;

public class PullPersonService {

    public static List<Person> getPersonList(InputStream inStream)
            throws Exception {
        List<Person> personList = null;
        //拿到XmlPullParser解析器
        XmlPullParser parser = Xml.newPullParser();
        //统一编码
        parser.setInput(inStream, "utf-8");

        int eventType = parser.getEventType();
        //创建一个person对象
        Person person = null;
        //开始解析
        while (eventType != XmlPullParser.END_DOCUMENT) {
            switch (eventType) {
            case XmlPullParser.START_DOCUMENT:
                personList = new ArrayList<Person>();
                break;
            case XmlPullParser.START_TAG:
                // 判断当前元素名是否为person
                if ("person".equals(parser.getName())) {
                    person = new Person();
                    person.setId(Integer.valueOf(parser.getAttributeValue(0)));
                } else if ("name".equals(parser.getName())) {
                    person.setName(parser.nextText());
                } else if ("age".equals(parser.getName())) {
                    person.setAge(Integer.valueOf(parser.nextText()));
                }
                break;
            case XmlPullParser.END_TAG:
                if ("person".equals(parser.getName()) && person != null) {
                    personList.add(person);
                    person = null;
                }
                break;
            }

            // next方法的调用导致下一个节点的解析，同时返回下一个节点解析的事件类型代码
            eventType = parser.next();
        }
        return personList;
    }
｝

<pre name="code" class="html">package cn.class3g.service; import java.io.InputStream; import java.io.Writer; import java.util.ArrayList; import java.util.List; import org.xmlpull.v1.XmlPullParser; import org.xmlpull.v1.XmlSerializer; import android.util.Xml; import cn.class3g.domain.Person; public class PullPersonService { public static List<Person> getPersonList(InputStream inStream) throws Exception { List<Person> personList = null; //拿到XmlPullParser解析器 XmlPullParser parser = Xml.newPullParser(); //统一编码 parser.setInput(inStream, "utf-8"); int eventType = parser.getEventType(); //创建一个person对象 Person person = null; //开始解析 while (eventType != XmlPullParser.END_DOCUMENT) { switch (eventType) { case XmlPullParser.START_DOCUMENT: personList = new ArrayList<Person>(); break; case XmlPullParser.START_TAG: // 判断当前元素名是否为person if ("person".equals(parser.getName())) { person = new Person(); person.setId(Integer.valueOf(parser.getAttributeValue(0))); } else if ("name".equals(parser.getName())) { person.setName(parser.nextText()); } else if ("age".equals(parser.getName())) { person.setAge(Integer.valueOf(parser.nextText())); } break; case XmlPullParser.END_TAG: if ("person".equals(parser.getName()) && person != null) { personList.add(person); person = null; } break; } // next方法的调用导致下一个节点的解析，同时返回下一个节点解析的事件类型代码 eventType = parser.next(); } return personList; } ｝

 

 

接下来测试，在activity包下创建Test测试类：

 

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package cn.class3g.activity;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import cn.class3g.domain.Person;
import cn.class3g.service.PullPersonService;

import android.test.AndroidTestCase;
import android.util.Log;

public class Test extends AndroidTestCase {

    public void testPull() throws Throwable {
        InputStream inStream = this.getClass().getClassLoader()
                .getResourceAsStream("person_list.xml");
        List<Person> personList = PullPersonService.getPersonList(inStream);
        Log.i("TAG", personList.toString());
    }
}

package cn.class3g.activity; import java.io.InputStream; import java.util.ArrayList; import java.util.List; import cn.class3g.domain.Person; import cn.class3g.service.PullPersonService; import android.test.AndroidTestCase; import android.util.Log; public class Test extends AndroidTestCase { public void testPull() throws Throwable { InputStream inStream = this.getClass().getClassLoader() .getResourceAsStream("person_list.xml"); List<Person> personList = PullPersonService.getPersonList(inStream); Log.i("TAG", personList.toString()); } }
在测试前在清单中添加测试权限：

 

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<instrumentation android:name="android.test.InstrumentationTestRunner" android:targetPackage="cn.class3g.activity"></instrumentation>

<instrumentation android:name="android.test.InstrumentationTestRunner" android:targetPackage="cn.class3g.activity"></instrumentation>
利用Android JUnit Test测试：

 

控制台输出：

另外两篇http://blog.csdn.net/qeqeqe236/article/details/6990245

http://yangguangfu.iteye.com/blog/832277

测试成功