学习Pull文件的解析方式：

学习Pull文件的解析方式：1.得到一个解析器对象XmlPullParser parser = Xml.newPullParser();2.初始化解析器，第一个参数为输入流，第二对数为解析的编码parser.setInput(is, "utf-8");package com.example.weather;import java.util.List;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;import android.widget.Toast;import com.example.weather.domain.WeatherInfo;import com.example.weather.service.WeatherService;public class MainActivity extends Activity {private TextView tv;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);tv = (TextView) findViewById(R.id.tv);try {System.out.println("bug-->1");//类加载为一个读取字节流,读取weather.xml文件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) {Toast.makeText(this, "解析失败", 0).show();e.printStackTrace();}}}package com.example.weather.service;import java.io.InputStream;import java.util.ArrayList;import java.util.List;import org.xmlpull.v1.XmlPullParser;import android.util.Xml;import com.example.weather.domain.WeatherInfo;public class WeatherService {public static List<WeatherInfo> getWeatherInfos(InputStream is) throws Exception{XmlPullParser parser = Xml.newPullParser();//初始化解析器,第一参数为一个读取流，第二为编码parser.setInput(is, "utf-8");List<WeatherInfo> weatherInfos = null;WeatherInfo weatherInfo = null;//得到当前事件类型返回一个整型0int type = parser.getEventType();//直到结束文档解析，也就是END_DOCUMENT循环结束while (type != XmlPullParser.END_DOCUMENT) {switch (type) {//开始解析标签case XmlPullParser.START_TAG:   //getName()为取得标签的名字，如果为"infos"说明为根标签，那么建立一个ArrayList<WeatherInfo>类型存放对象if ("infos".equals(parser.getName())) {weatherInfos = new ArrayList<WeatherInfo>();//getName()取得标签名为"ciry"，为对象标签，建立一个weatherInfo对象，看weather.xml就会明白//getAttributeValue(0)取得id 属性} 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())) {//nextText()为指向下一个标签，也就是getName()的标签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;//直到为结束标签，如果结束标签为"city",这时一个WeatherInfo对象解析完成，把对象加到ArrsyList<WeatherInfo>中//将weatherInfo置为空，以便开始解析下一个WeatherInfo对象case XmlPullParser.END_TAG:if ("city".equals(parser.getName())) {weatherInfos.add(weatherInfo);weatherInfo = null;}break;}//结束循环的语句parser.next()指向下一个标签的作用type = parser.next();}//返回List<WeatherInfo>对象return weatherInfos;} }package com.example.weather.domain;public class WeatherInfo {private int id;private String wind;private String weather;private String name;private String temp;private String pm;public WeatherInfo() {}public WeatherInfo(int id, String wind, String weather, String name,String temp, String pm) {super();this.id = id;this.wind = wind;this.weather = weather;this.name = name;this.temp = temp;this.pm = pm;}@Overridepublic String toString() {return " [Cityid=" + id + ", 风力=" + wind + ", 天气情况="+ weather + ", 名称=" + name + ", 温度=" + temp + ", pm2.5=" + pm+ "]";}public int getId() {return id;}public void setId(int id) {this.id = id;}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 getName() {return name;}public void setName(String name) {this.name = name;}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;}}<?xml version="1.0" encoding="utf-8"?><infos><city id="1"><temp>20*C/30*C</temp><weather>3月15日 多云转阴</weather><wind>南风1-5级</wind><name>上海</name><pm>200</pm></city><city id="2"><temp>13*C/23*C</temp><weather>5月1日 晴</weather><wind>南风4-9级</wind><name>北京</name><pm>600</pm></city><city id="3"><temp>14*C/29*C</temp><weather>7月24日 多云</weather><wind>北风7-9级</wind><name>武汉</name><pm>500</pm></city></infos>全部代码:package com.example.weather;import java.util.List;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;import android.widget.Toast;import com.example.weather.domain.WeatherInfo;import com.example.weather.service.WeatherService;public class MainActivity extends Activity {private TextView tv;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);tv = (TextView) findViewById(R.id.tv);try {System.out.println("bug-->1");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) {Toast.makeText(this, "解析失败", 0).show();e.printStackTrace();}}}package com.example.weather.service;import java.io.InputStream;import java.util.ArrayList;import java.util.List;import org.xmlpull.v1.XmlPullParser;import android.util.Xml;import com.example.weather.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;}break;}type = parser.next();}return weatherInfos;} }package com.example.weather.domain;public class WeatherInfo {private int id;private String wind;private String weather;private String name;private String temp;private String pm;public WeatherInfo() {}public WeatherInfo(int id, String wind, String weather, String name,String temp, String pm) {super();this.id = id;this.wind = wind;this.weather = weather;this.name = name;this.temp = temp;this.pm = pm;}@Overridepublic String toString() {return " [Cityid=" + id + ", 风力=" + wind + ", 天气情况="+ weather + ", 名称=" + name + ", 温度=" + temp + ", pm2.5=" + pm+ "]";}public int getId() {return id;}public void setId(int id) {this.id = id;}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 getName() {return name;}public void setName(String name) {this.name = name;}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;}}<?xml version="1.0" encoding="utf-8"?><infos><city id="1"><temp>20*C/30*C</temp><weather>3月15日 多云转阴</weather><wind>南风1-5级</wind><name>上海</name><pm>200</pm></city><city id="2"><temp>13*C/23*C</temp><weather>5月1日 晴</weather><wind>南风4-9级</wind><name>北京</name><pm>600</pm></city><city id="3"><temp>14*C/29*C</temp><weather>7月24日 多云</weather><wind>北风7-9级</wind><name>武汉</name><pm>500</pm></city></infos>