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;
    }
}