采用pull解析xml文件

weather.xml

<?xml version="1.0" encoding="GBK"?>
<infos>
	<city id="1">
		<temp>20℃/30℃</temp>
		<weather>5月20日 多云转阴</weather>
		<wind>南风3-4级</wind>
		<name>上海</name>
		<pm>200</pm>
	</city>

	<city id="2">
		<temp>20℃/30℃</temp>
		<weather>5月20日 多云转晴</weather>
		<wind>南风7-8级</wind>
		<name>合肥</name>
		<pm>800</pm>
	</city>

	<city id="3">
		<temp>6℃/10℃</temp>
		<weather>5月20日 多云转雨夹雪</weather>
		<wind>南风2-6级</wind>
		<name>哈尔滨</name>
		<pm>100</pm>
	</city>
</infos>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

</RelativeLayout>

package com.demo.weather;

public class WeatherInfo {
	private int id;
	private String name;
	private String wind;
	private String weather;
	private String temp;
	private String pm;
	
	
	
	
	
	@Override
	public String toString() {
		return "天气信息 [城市编号=" + id + ",城市名称=" + name + ",城市风度=" + wind
				+ ",城市天气=" + weather + ",神马=" + temp + ",舒适度吧=" + pm
				+ "]";
	}

	public WeatherInfo() {
		super();
	}
	
	public WeatherInfo(int id,String name,String wind,String weather,String temp,String pm) {
		super();
		this.id = id;
		this.name = name;
		this.wind = wind;
		this.weather = weather;
		this.temp = temp;
		this.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;
	}
	
}

package com.demo.weather;

/**
 * DOM 加载内存，生成一个树状结构，消耗内存比较大
 * SAX 基于时间的方式 ，速度快，效率高，不能倒退
 * Pull解析
 */


import java.io.IOException;
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 android.widget.ArrayAdapter;

public class WeatherService {
	public static List<WeatherInfo> getWeatherInfos(InputStream is) throws XmlPullParserException,IOException{
		XmlPullParser parser = Xml.newPullParser();
				//初始化解析器
				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())){
							//解析到全局开始的标签
							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())){
							//一个城市的信息已经处理完毕了
							weatherInfos.add(weatherInfo);
							weatherInfo = null;
						}
						break;
					}
					type = parser.next();
					
				}
				
				return weatherInfos;
	}
}

package com.demo.weather;

import java.io.IOException;
import java.util.List;

import org.xmlpull.v1.XmlPullParserException;

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 (XmlPullParserException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			Toast.makeText(this,"解析失败",0).show();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			Toast.makeText(this,0).show();
		}
		
	}

}

（编辑：李大同）

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