pull解析xml文件

模擬從網站獲取天氣預報解析

模擬一份天氣的xml文件，保存的時候需要選定編碼，winds默認是gbk編碼，解析的時候傳入的碼錶要對應

<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
<weather>
    <city>
        <name>上海</name>
        <temp>5°</temp>
        <pm>80</pm>
    </city>
    <city>
        <name>北京</name>
        <temp>-5°</temp>
        <pm>800</pm>
    </city>
    <city>
        <name>西安</name>
        <temp>12°</temp>
        <pm>60</pm>
    </city>
</weather>

<Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="解析天氣信息" 
        android:onClick="click"
        />

package com.itheima.pullparser;

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

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

import com.itheima.pullparser.domain.City;

import android.os.Bundle;
import android.app.Activity;
import android.util.Xml;
import android.view.Menu;
import android.view.View;

public class MainActivity extends Activity {

    List<City> cityList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void click(View v){
        //獲取到src文件夾下的資源文件
        InputStream is = getClassLoader().getResourceAsStream("weather.xml");

        //拿到pull解析器對象
        XmlPullParser xp = Xml.newPullParser();
        //初始化
        try {
            //告知文件路徑，利用gbk解析
            xp.setInput(is, "gbk");

            //獲取當前節點的事件類型，通過事件類型的判斷，我們可以知道當前節點是什麼節點，從而確定我們應該做什麼操作
            int type = xp.getEventType();
            City city = null;
            while(type != XmlPullParser.END_DOCUMENT){
                //根據節點的類型，要做不同的操作
                switch (type) {
                case XmlPullParser.START_TAG:
                    //獲取當前節點的名字
                    if("weather".equals(xp.getName())){
                        //創建city集合對象，用於存放city的javabean
                        cityList = new ArrayList<City>();
                    }
                    else if("city".equals(xp.getName())){
                        //創建city的javabean對象
                        city = new City();
                    }
                    else if("name".equals(xp.getName())){
                        //獲取當前節點的下一個節點的文本
                        String name = xp.nextText();
                        city.setName(name);
                    }
                    else if("temp".equals(xp.getName())){
                        //獲取當前節點的下一個節點的文本
                        String temp = xp.nextText();
                        city.setTemp(temp);
                    }
                    else if("pm".equals(xp.getName())){
                        //獲取當前節點的下一個節點的文本
                        String pm = xp.nextText();
                        city.setPm(pm);
                    }
                    break;
                case XmlPullParser.END_TAG:
                    if("city".equals(xp.getName())){
                        //把city的javabean放入集合中
                        cityList.add(city);
                    }
                    break;

                }

                //把指針移動到下一個節點，並返回該節點的事件類型
                type = xp.next();
            }

            for (City c : cityList) {
                System.out.println(c.toString());
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}

package com.itheima.pullparser.domain;

public class City {

    private String name;
    private String temp;
    private String pm;
    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;
    }
    @Override
    public String toString() {
        return "City [name=" + name + ", temp=" + temp + ", pm=" + pm + "]";
    }


}