解析XML文件的逻辑代码。

package cn.itcast.weather;

import android.util.Xml;
import org.xmlpull.v1.XmlPullParser;
import java.io.InputStream;
import java.util.List;
import java.util.ArrayList;
public class WeatherService {
public static ListgetInfosFromXML(InputStream is)throws Exception{
XmlPullParser parser=Xml.newPullParser();
parser.setInput(is,“utf-8”);
ListweatherInfos=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();
}else if (“city”.equals(parser.getName())){
weatherInfo=new WeatherInfo();
String idStr=parser.getAttributeValue(0);
weatherInfo.setId(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 (“name”.equals(parser.getName())){
String name=parser.nextText();
weatherInfo.setName(name);
}else if (“pm”.equals(parser.getName())){
String pm=parser.nextText();
weatherInfo.setPm(pm);
}else if (“wind”.equals(parser.getName())){
String wind=parser.nextText();
weatherInfo.setWind(wind);
}
break;
case XmlPullParser.END_TAG:
if (“city”.equals(parser.getName())){
weatherInfos.add(weatherInfo);
weatherInfo=null;
}
break;
}
type=parser.next();
}
return weatherInfos;
}
}