对xml进行解析

1、要解析的xml文件

 <?xml version="1.0" encoding="utf-8"?>
 <infos>
     <city id="1">
         <temp>20C/30C</temp>
         <weather>多云转晴</weather>
         <wind>7-8级</wind>
         <name>广州</name>
         <pm>200</pm>
     </city>
     <city id="2">
         <temp>25C/30C</temp>
         <weather>多云转晴</weather>
         <wind>2-3级</wind>
         <name>钦州</name>
         <pm>100</pm>
     </city>
     <city id="3">
         <temp>20C/30C</temp>
         <weather>多云转晴</weather>
         <wind>7-9级</wind>
         <name>北海</name>
         <pm>250</pm>
     </city>
 </infos>

2、activity代码

 package com.example.myweather;

 import java.util.List;

 import com.example.myweather.service.WeatherService;
 import com.example.myweather.domain.WeatherInfo;
 import android.os.Bundle;
 import android.app.Activity;
 import android.view.Menu;
 import android.widget.TextView;
 import android.widget.Toast;

 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);
         try{
             List<WeatherInfo> Infos = WeatherService.getWeatherInfos(MainActivity.class.getClassLoader().getResourceAsStream("weather.xml"));
             StringBuffer sb = new StringBuffer();
             for(WeatherInfo info : Infos){
                 String str = info.toString();
                 sb.append(str);
                 sb.append("\n");
             }

             tv.setText(sb.toString());
         }catch(Exception e){
             e.printStackTrace();
             Toast.makeText(this, "解析失败!", 0).show();
         }

     }

 }

3、解析xml

 package com.example.myweather.service;

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

 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;

 import android.util.Xml; 

 import com.example.myweather.domain.WeatherInfo;

 public class WeatherService {

     public static List<WeatherInfo> getWeatherInfos(InputStream is) throws Exception{
         XmlPullParser parser = Xml.newPullParser();
         parser.setInput(is,"utf-8");
         List<WeatherInfo> weatherInfos = null;
         WeatherInfo weatherInfo = null;
         int type = parser.getEventType();
         while(type != XmlPullParser.END_DOCUMENT){

             switch(type){
             case XmlPullParser.START_TAG:
                 if("infos".equals(parser.getName())){
                     weatherInfos = new ArrayList<WeatherInfo>();
                 }else if("city".equals(parser.getName())){
                     weatherInfo = new WeatherInfo();
                     String idStr = parser.getAttributeValue(0);
                     weatherInfo.setId(Integer.parseInt(idStr));
                 }else if("temp".equals(parser.getName())){
                     String temp = parser.nextText();
                     weatherInfo.setTemp(temp);
                 }else if("weather".equals(parser.getName())){
                     String weather = parser.nextText();
                     weatherInfo.setWeather(weather);
                 }else if("wind".equals(parser.getName())){
                     String wind = parser.nextText();
                     weatherInfo.setWind(wind);
                 }else if("name".equals(parser.getName())){
                     String name = parser.nextText();
                     weatherInfo.setName(name);
                 }else if("pm".equals(parser.getName())){
                     String pm = parser.nextText();
                     weatherInfo.setPm(pm);
                 }
                 break;
             case XmlPullParser.END_TAG:
                 if("city".equals(parser.getName())){
                     weatherInfos.add(weatherInfo);
                     weatherInfo = null;
                 }
             default:
                 break;
             }

             type = parser.next();
         }
         return weatherInfos;
     }
 }

4、weatherInfo类

 package com.example.myweather.domain;

 public class WeatherInfo {

     private int id;
     private String temp;
     private String weather;
     private String wind;
     private String name;
     private String pm;

     @Override
     public String toString() {
         return "WeatherInfo [id=" + id + ", temp=" + temp + ", weather="
                 + weather + ", wind=" + wind + ", name=" + name + ", pm=" + pm
                 + "]";
     }
     public int getId() {
         return id;
     }
     public void setId(int id) {
         this.id = id;
     }
     public String getTemp() {
         return temp;
     }
     public void setTemp(String temp) {
         this.temp = temp;
     }
     public String getWeather() {
         return weather;
     }
     public void setWeather(String weather) {
         this.weather = weather;
     }
     public String getWind() {
         return wind;
     }
     public void setWind(String wind) {
         this.wind = wind;
     }
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public String getPm() {
         return pm;
     }
     public void setPm(String pm) {
         this.pm = pm;
     }
 }