student.xml
<?xml version="1.0" encoding="utf-8"?> <stundets> <student id="20120812115"> <name>张三</name> <speciality>通信工程</speciality> <qq>843200157</qq> </student> <student id="20120812116"> <name>李四</name> <speciality>网络工程</speciality> <qq>812256156</qq> </student> <student id="20120812117"> <name>王五</name> <speciality>软件工程</speciality> <qq>812750158</qq> </student> </stundets>
student.java
package xom.supermario.pullxml; public class Student { long Id; //用于存放id信息 String Name; //用于存放Name信息 String Speciality; //用于存放专业信息 long QQ; //用于存放QQ信息 //带参数构造函数，用于初始化类 public Student(long id, String name, String speciality, long qQ) { super(); Id = id; Name = name; Speciality = speciality; QQ = qQ; } //不带参数构造函数 public Student() { super(); } //取得id public long getId() { return Id; } //取得Name public String getName() { return Name; } //取得QQ public long getQQ() { return QQ; } //取得专业信息 public String getSpeciality() { return Speciality; } //设置id public void setId(long id) { Id = id; } //设置姓名 public void setName(String name) { Name = name; } //设置QQ public void setQQ(long qQ) { QQ = qQ; } //设置专业 public void setSpeciality(String speciality) { Speciality = speciality; } }
studentHandler.java
package xom.supermario.pullxml; import java.util.List; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; import android.util.Log; public class StudentHandler extends DefaultHandler { private String preTAG; //用于存储xml节点的名称 private List<Student> ListStudent; private Student stu; //无参数实例化类 public StudentHandler() { super(); } //带参数实例化类 public StudentHandler(List<Student> listStudent) { super(); ListStudent = listStudent; } //开始解析文档 public void startDocument() throws SAXException { // TODO Auto-generated method stub Log.i("------>", "文档开始"); super.startDocument(); } //开始解析文档的元素 public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { Log.i("localName-------->", localName); preTAG=localName; //将当前元素的名称保存到preTAG if ("student".equals(localName)) { stu=new Student(); //实例化一个student类 //将ID信息保存到stu中 stu.setId(Long.parseLong(attributes.getValue(0))); for (int i = 0; i < attributes.getLength(); i++) { Log.i("attributes-------->",String.valueOf(stu.getId())); } } //这句话记得要执行 super.startElement(uri, localName, qName, attributes); } public void endDocument() throws SAXException { Log.i("------>", "文档结束"); super.endDocument(); } public void endElement(String uri, String localName, String qName) throws SAXException { preTAG=""; if ("student".equals(localName)) { ListStudent.add(stu); Log.i("-------->", "一个元素解析完成"); } super.endElement(uri, localName, qName); } //解析节点文本内容 public void characters(char[] ch, int start, int length) throws SAXException { String str; //找出元素中的“name”节点 if ("name".equals(preTAG)) { str=new String(ch,start,length); stu.setName(str); Log.i("name=", stu.getName()); //找出元素中的“speciality”节点 }else if ("speciality".equals(preTAG)) { str=new String(ch,start,length); stu.setSpeciality(str); Log.i("speciality=", stu.getSpeciality()); //找出元素中的“qq”节点 }else if ("qq".equals(preTAG)) { str=new String(ch,start,length); stu.setQQ(Long.parseLong((str))); Log.i("QQ=", String.valueOf(stu.getQQ())); } super.characters(ch, start, length); } public List<Student> getListStudent() { return ListStudent; } public void setListStudent(List<Student> listStudent) { ListStudent = listStudent; } }
layout.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <Button android:id="@+id/btn1" android:layout_height="wrap_content" android:layout_width="fill_parent" android:text="PULL解析" /> <ListView android:id="@+id/listView1" android:layout_height="wrap_content" android:layout_width="fill_parent" /> </LinearLayout>
pullXMLActivity.java
package xom.supermario.pullxml; import java.io.InputStream; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.xmlpull.v1.XmlPullParser; import org.xmlpull.v1.XmlPullParserFactory; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.ListView; public class PullXMLActivity extends Activity { //新建一个按键 private Button button; //新建一个列表 private ListView listView; //新建一个数组列表用于存放字符串数组 private ArrayList<String> list=new ArrayList<String>(); public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); button=(Button)findViewById(R.id.btn1); listView=(ListView) findViewById(R.id.listView1); //为按键绑定监听器 button.setOnClickListener(new ButtonListener()); } class ButtonListener implements OnClickListener{ @Override public void onClick(View v) { //将解析后的结果存储到students中 List<Student> students=parserXMl(); // List<Student> students=null; //枚举数组中的元素 for (Iterator iterator = students.iterator(); iterator.hasNext();) { Student student = (Student) iterator.next(); //将类的内容转换成字符串，依次存储到list中 list.add(String.valueOf(student.getId())+" "+student.getName()+" "+student.getSpeciality()+" "+String.valueOf((student.getQQ()))); } //新建一个适配器daapter用于给listview提供数据 ArrayAdapter<String> adapter=new ArrayAdapter<String>(PullXMLActivity.this, android.R.layout.simple_list_item_1, list); //为listview绑定适配器 listView.setAdapter(adapter); } } //解析xml文件 private List<Student> parserXMl() { //初始化一个List<student>变量，用于将所有student成员 List<Student> students=null; //初始化一个student变量，用于存储每一个节点的信息 Student stu=null; try{ //打开资源文件student.xml InputStream inputstream=PullXMLActivity.this.getResources().getAssets().open("student.xml"); //创建XmlParser有两种方式 //方式一：使用工厂类XmlPullParserFactory XmlPullParserFactory pullFactory=XmlPullParserFactory.newInstance(); XmlPullParser xmlPullParser=pullFactory.newPullParser(); //方式二：使用Android提供的实用工具类android.util.Xml //XmlPullParser xmlPullParser=Xml.newPullParser(); //设置输入字节流为inputstream，并设置编码方式为“UTF-8” xmlPullParser.setInput(inputstream, "UTF-8"); //取得事件类型，用于开始解析时的判断 int eventType=xmlPullParser.getEventType(); //循环遍历整个文件直到解析完毕 while(eventType != XmlPullParser.END_DOCUMENT) { /*打印log显示事件类型 *START_DOCUMENT:0 *END_DOCUMENT:1 *START_TAG:2 *END_TAG:3 *TEXT:4 */ Log.e("guojs--->event",eventType+""); //用于存储节点名称 String localName=null; switch(eventType) { case XmlPullParser.START_DOCUMENT: //碰到文档开头则实例化students变量，并打印log students=new ArrayList<Student>(); Log.e("guojs","start document!"); break; case XmlPullParser.START_TAG: { localName=xmlPullParser.getName(); if ("student".equals(xmlPullParser.getName())) { stu=new Student(); //实例化一个student类 //将ID信息保存到stu中 stu.setId(Long.parseLong(xmlPullParser.getAttributeValue(0))); Log.e("guojs",stu.getId()+""); } else if(stu != null) { //声明一个变量用于存储节点文本 String currentData=null; if("name".equals(xmlPullParser.getName())) { /*注意这里nextText()的使用：当前事件为START_TAG， * 如果接下去是文本，就会返回当前的文本内容；如果下一个事件是END_TAG * 就会返回空字符串；否则抛出一个异常。 */ currentData=xmlPullParser.nextText(); //存储”name“的信息 stu.setName(currentData); } else if("speciality".equals(xmlPullParser.getName())) { currentData=xmlPullParser.nextText(); //存储专业信息 stu.setSpeciality(currentData); }else if("qq".equals(xmlPullParser.getName())) { currentData=xmlPullParser.nextText(); //存储QQ信息 stu.setQQ(Long.parseLong(currentData)); } } } break; case XmlPullParser.END_TAG: { localName=xmlPullParser.getName(); Log.e("guojs--end tag",localName); if("student".equals(localName) && stu != null) { //将stu添加进students数组列表中 students.add(stu); //设置stu为空 stu = null; } } break; default: break; } //解析下一个事件 eventType=xmlPullParser.next(); } }catch(Exception e) { e.printStackTrace(); } return students; } }