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>200pm> city><city id="2">  <temp>-1℃/5℃temp>  <weather>多云weather>  <wind>南风3-4级wind>  <name>北京7-8name>  <pm>800pm> 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>100pm> 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;   @Override public 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 parse(InputStream is) {  List 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();     } 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 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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