Android 中使用Pull解析XML文件

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解析XML文件是非常常用的功能，在Android客户端中，经常与服务器通信都需要xml文件的支持，我们这里介绍一个

简单的xml文件的解析，就是使用android中的pull方法进行解析。在java中，有dom解析和sax解析，这个pull解析有些类

似于sax解析，他也是一行一行的读取然后解析内容的方法.

首先看一下这个简单的xml文件

<?xml version="1.0" encoding="utf-8"?><infos><city id="1"><temp>-1℃/5℃</temp><weather>多云</weather><wind>南风3-4级</wind><name>上海</name><pm>200</pm></city><city id="2"><temp>-1℃/5℃</temp><weather>多云</weather><wind>南风3-4级</wind><name>北京7-8</name><pm>800</pm></city><city id="3"><temp>-7℃/5℃</temp><weather>多云</weather><wind>南风3-4级</wind><name>哈尔滨</name><pm>100</pm></city></infos>

然后我们直接解析这个xml文件，在textview中显示一下

这里是代码，首先是业务Bean

package com.bird.weather;public class WeatherBean {private int id;private String name;private String wind;private String weather;private String temp;private String pm;@Overridepublic String toString() {return "WeatherBean [id=" + id + ", name=" + name + ", wind=" + wind+ ", weather=" + weather + ", temp=" + temp + ", pm=" + pm+ "]";}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 String getWind() {return wind;}public void setWind(String wind) {this.wind = wind;}public String getWeather() {return weather;}public void setWeather(String weather) {this.weather = weather;}public String getTemp() {return temp;}public void setTemp(String temp) {this.temp = temp;}public String getPm() {return pm;}public void setPm(String pm) {this.pm = pm;}}

然后是解析xml文件的主要代码

package com.bird.weather;import java.io.InputStream;import java.util.ArrayList;import java.util.List;import org.xmlpull.v1.XmlPullParser;import android.util.Xml;public class ParseXml {public static List<WeatherBean> parse(InputStream is) {List<WeatherBean> list = null;WeatherBean bean = null;try {XmlPullParser parser = Xml.newPullParser();// 初始化解析器parser.setInput(is, "utf-8");int type = parser.next();while (type != XmlPullParser.END_DOCUMENT) {switch (type) {case XmlPullParser.START_TAG:if ("infos".equals(parser.getName())) {list = new ArrayList<WeatherBean>();} else if ("city".equals(parser.getName())) {bean = new WeatherBean();bean.setId(Integer.valueOf(parser.getAttributeValue(0)));} else if ("temp".equals(parser.getName())) {String temp = parser.nextText();bean.setTemp(temp);} else if ("weather".equals(parser.getName())) {String weather = parser.nextText();bean.setWeather(weather);} else if ("wind".equals(parser.getName())) {String wind = parser.nextText();bean.setWind(wind);} else if ("name".equals(parser.getName())) {String name = parser.nextText();bean.setName(name);} else if ("pm".equals(parser.getName())) {String pm = parser.nextText();bean.setPm(pm);}break;case XmlPullParser.END_TAG:if ("city".equals(parser.getName())) {// 一个城市的信息处理完毕list.add(bean);bean = null;}break;}type = parser.next();}} catch (Exception e) {e.printStackTrace();}return list;}}

最后在mainactivity中使用这个代码，使用类加载器完成这个简单的功能

package com.bird.weather;import java.util.List;import android.os.Bundle;import android.app.Activity;import android.widget.TextView;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                TextView tv =  (TextView) findViewById(R.id.tv);        List<WeatherBean> list = ParseXml.parse(MainActivity.class.getClassLoader().getResourceAsStream("test.xml"));        StringBuffer sb = new StringBuffer();        for(WeatherBean bean : list){        String str = bean.toString();        sb.append(str);        sb.append("\n");        }                tv.setText(sb.toString());    }    }

这样看来，解析xml文件还是非常简单的

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