解析XML通常有3种方法：
1）SAX：SAX解析器的优点是解析速度快，占用内存少。
2）DOM：对于特别大的文档，解析和加载整个文档将会很耗资源。
3）PULL：PULL解析器小巧轻便，解析速度快，简单易用，非常适合在Android移动设备中使用，Android系统内部在解析各种XML时也是用PULL解析器。
这里只介绍PULL解析方法的使用。步骤如下：
1、在项目的assets目录中放置一个XML文档provinceandcity.xml，内容如下：
<resources> <province id="1" name="直辖市"> <item> <id>1</id> <name>北京</name> </item> <item> <id>2</id> <name>上海</name> </item> <item> <id>3</id> <name>天津</name> </item> <item> <id>4</id> <name>重庆</name> </item> </province> <province id="2" name="广东"> <item> <id>5</id> <name>广州</name> </item> <item> <id>6</id> <name>深圳</name> </item> <item> <id>7</id> <name>珠海</name> </item> <item> <id>8</id> <name>汕头</name> </item> <item> <id>9</id> <name>韶关</name> </item> <item> <id>10</id> <name>佛山</name> </item> <item> <id>11</id> <name>江门</name> </item> <item> <id>12</id> <name>湛江</name> </item> <item> <id>13</id> <name>茂名</name> </item> <item> <id>14</id> <name>肇庆</name> </item> <item> <id>15</id> <name>惠州</name> </item> <item> <id>16</id> <name>梅州</name> </item> <item> <id>17</id> <name>汕尾</name> </item> <item> <id>18</id> <name>河源</name> </item> <item> <id>19</id> <name>阳江</name> </item> <item> <id>20</id> <name>清远</name> </item> <item> <id>21</id> <name>东莞</name> </item> <item> <id>22</id> <name>中山</name> </item> <item> <id>23</id> <name>潮州</name> </item> <item> <id>24</id> <name>揭阳</name> </item> <item> <id>25</id> <name>云浮</name> </item> </province> ........ </resources>
2）创建一个City类，用于暂存xml中的数据，看一下City.java的代码：
package com.example.provinceandcityforcn;
public class City {
int cityId;
int provinceId;
String cityName;
String provinceName;
public int getCityId() {
return cityId;
}
public void setCityId(int cityId) {
this.cityId = cityId;
}
public int getProvinceId() {
return provinceId;
}
public void setProvinceId(int provinceId) {
this.provinceId = provinceId;
}
public String getProvinceName() {
return provinceName;
}
public void setProvinceName(String provinceName) {
this.provinceName = provinceName;
}
public String getCityName() {
return cityName;
}
public void setCityName(String cityName) {
this.cityName = cityName;
}
}
3）PULL解析xml：
package com.example.provinceandcityforcn; import org.xmlpull.v1.XmlPullParser; import org.xmlpull.v1.XmlPullParserException; import org.xmlpull.v1.XmlPullParserFactory; import android.content.res.XmlResourceParser; import java.io.IOException; import java.io.InputStream; import java.io.StringReader; import java.util.ArrayList; /** * 解析XML，获取城市 * */ public class CityPullParse { public static ArrayList<City> Parse(String CityString){ ArrayList<City> CityArray = new ArrayList<City>(); try { //定义工厂 XmlPullParserFactory XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); //定义解析器 XmlPullParser XmlPullParser parser = factory.newPullParser(); //获取xml输入数据 parser.setInput(new StringReader(CityString)); CityArray = ParseXml(parser); } catch (XmlPullParserException e) { // TODO Auto-generated catch block e.printStackTrace(); } return CityArray; } public static ArrayList<City> Parse(InputStream cityIS){ ArrayList<City> cityArray = new ArrayList<City>(); try { //定义工厂 XmlPullParserFactory XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); //定义解析器 XmlPullParser(要转换为XmlResourceParser,否则不能正常解析) XmlResourceParser parser =(XmlResourceParser) factory.newPullParser(); //获取xml输入数据 parser.setInput(cityIS,"utf-8"); cityArray = ParseXml(parser); } catch (XmlPullParserException e) { e.printStackTrace(); } return cityArray; } /** * @param parser * @return */ public static ArrayList<City> ParseXml(XmlPullParser parser){ ArrayList<City> CityArray = new ArrayList<City>(); City CityTemp = null; int provinceId = 0; int cityId; String cityName; String provinceName = ""; try { //开始解析事件 int eventType = parser.getEventType(); //处理事件，不碰到文档结束就一直处理 while (eventType != XmlPullParser.END_DOCUMENT) { //因为定义了一堆静态常量，所以这里可以用switch switch (eventType) { case XmlPullParser.START_DOCUMENT: break; case XmlPullParser.START_TAG: //给当前标签起个名字 String tagName = parser.getName(); if(tagName.equals("province")){ provinceId = Integer.parseInt(parser.getAttributeValue(null,"id"));//获取province节点属性为id的值 //provinceId = Integer.parseInt(parser.getAttributeValue(0));//第二种方式（获取province节点属性为id的值 provinceName = String.valueOf(parser.getAttributeValue(null,"name"));//获取province节点属性为name的值 }else if(tagName.equals("item")){ CityTemp = new City(); }else if(tagName.equals("id")){ cityId = Integer.parseInt(parser.nextText()); parser.next(); cityName = parser.nextText(); CityTemp.setProvinceId(provinceId); CityTemp.setCityId(cityId); CityTemp.setProvinceName(provinceName); CityTemp.setCityName(cityName); CityArray.add(CityTemp); } break; case XmlPullParser.END_TAG: break; case XmlPullParser.END_DOCUMENT: break; } //别忘了用next方法处理下一个事件，忘了的结果就成死循环#_# eventType = parser.next(); } } catch (XmlPullParserException e) { // TODO Auto-generated catch block e.printStackTrace(); }catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return CityArray; } }
4）UI调用：
（1）布局文件：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".CityActivity" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="50dip"
android:gravity="center"
android:orientation="horizontal"
android:padding="5dip" >
<Button
android:id="@+id/btn_getcity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="获取城市列表" >
</Button>
</LinearLayout>
<ScrollView
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1" >
<TextView
android:id="@+id/textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="" >
</TextView>
</ScrollView>
</LinearLayout>
package com.example.provinceandcityforcn;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.app.Activity;
import android.content.res.XmlResourceParser;
public class CityActivity extends Activity implements OnClickListener {
private ArrayList<City> cityArray;
private String cityStr;
private TextView textview;
private String fileName = "provinceandcity.xml";
private XmlResourceParser provinceandcityParser;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_city);
((Button)findViewById(R.id.btn_getcity)).setOnClickListener(this);
textview=(TextView)findViewById(R.id.textview);
}
private void getcity(){
provinceandcityParser = getXMLFromResXml(fileName);
cityArray =CityPullParse.ParseXml(provinceandcityParser);
//cityArray = CityPullParse.Parse(getInputStreamFromAssets(fileName));
for(City city : cityArray){
cityStr += "省份ID["+city.getProvinceId() + "],省份name["+city.getProvinceName() + "],城市ID[" + city.getCityId() +"],"+city.getCityName()+"\n";
}
textview.setText(cityStr);
}
public XmlResourceParser getXMLFromResXml(String fileName){
XmlResourceParser xmlParser = null;
try {
xmlParser = this.getResources().getXml(R.xml.provinceandcity);
return xmlParser;
} catch (Exception e) {
e.printStackTrace();
}
return xmlParser;
}
/**
* 从assets中读取文件到InputStream中
*/
public InputStream getInputStreamFromAssets(String fileName){
try {
InputStream inputStream = getResources().getAssets().open(fileName);
return inputStream;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (v.getId()==R.id.btn_getcity){
getcity();
}
}
}
5）运行结果：
原文链接：https://www.f2er.com/xml/299107.html
