XML解析方式

package com.example.adapter;

import java.io.File;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.List;

import org.xmlpull.v1.XmlPullParser;

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

import com.example.kaoshi.R;

public class MyXmlPull extends Activity {

private Person p;
private List<Person> list;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

XmlPullParser parser = Xml.newPullParser();

// 得到文件

File file = new File(Environment.getExternalStorageDirectory(),
"person.xml");

// 输入流

try {
FileInputStream fis = new FileInputStream(file);

parser.setInput(fis, "utf-8");

// 得到事件的类型

int eventType = parser.getEventType();

while (eventType != parser.END_DOCUMENT) {
// 得到节点的名字

String name = parser.getName();

switch (eventType) {
case XmlPullParser.START_TAG:
if ("persons".equals(name)) {
list = new ArrayList<Person>();
} else if ("person".equals(name)) {
p = new Person();
} else if ("name".equals(name)) {
p.setName(parser.nextText());
} else if ("age".equals(name)) {
p.setAge(parser.nextText());
}
break;

case XmlPullParser.END_TAG:
if ("person".equals(name)) {
list.add(p);

p = null;
}
default:
break;
}

// 下一个事件类型是什么

eventType = parser.next();
}

} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}

package com.example.my_saxparse;

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

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;

import org.xml.sax.SAXException;

import org.xml.sax.helpers.DefaultHandler;

import com.bawi.bean.Person;

import android.os.Bundle;
import android.app.Activity;

import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity {

private ListView lv;
private ArrayList<Person> list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

//找控件

lv = (ListView) findViewById(R.id.lv);

}

//设置解析按钮监听
public void saxParse(View v)
{

try {

//获取xml文件的流对象
InputStream xmlInput = getAssets().open("data.xml");
//创建SAX解析工厂对象
SAXParserFactory factory = SAXParserFactory.newInstance();
//通过工厂对象获取一个解析器对象
SAXParser parser = factory.newSAXParser();
//创建一个继承了DefaultHandler类的一个子类
MyHandler mh  = new MyHandler();
//使用指定文件和mh进行解析
parser.parse(xmlInput, mh);

//调用获取集合的方法，将流对象进行传递
list = mh.getList();
//为lv设置监听
lv.setAdapter(new BaseAdapter() {

@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = View.inflate(MainActivity.this,R.layout.item, null);
TextView tv_1 = (TextView) view.findViewById(R.id.name_tv);
TextView tv_2 = (TextView) view.findViewById(R.id.age_tv);
tv_1.setText("姓名是："+list.get(position).getName());
tv_2.setText("年龄是："+list.get(position).getAge());
return view;
}

@Override
public long getItemId(int position) {
return 0;
}

@Override
public Object getItem(int position) {
return null;
}

@Override
public int getCount() {
return list.size();
}
});

} catch (Exception e) {
e.printStackTrace();
}

}
class MyHandler extends DefaultHandler{
private ArrayList<Person> list = null;
private Person p = null;
private String preTag=null;//作用是记录解析时的上一个节点名称

//      public  ArrayList<Person> getList(InputStream xmlIput) throws Exception
//      {
//          //创建SAX解析工厂对象
//          SAXParserFactory factory = SAXParserFactory.newInstance();
//          //通过工厂对象获取一个解析器对象
//          SAXParser parser = factory.newSAXParser();
//          MyHandler mh = new MyHandler();
//          //使用指定文件和mh进行解析
//          parser.parse(xmlIput, mh);
//          return mh.getList();
//
//      }

public ArrayList<Person> getList()
{
return list;
}

@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if(preTag!=null)
{
String content = new String(ch,start,length);
if("name".equals(preTag))
{
p.setName(content);
}
else if("age".equals(preTag))
{
p.setAge(Integer.parseInt(content));
}

}
}

@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
if("person".equals(qName))
{
list.add(p);
}

preTag=null;
/**当解析结束时置为空。这里很重要，例如，当图中画3的位置结束后，会调用这个方法
，如果这里不把preTag置为null，根据startElement(....)方法，preTag的值还是book，当文档顺序读到图
中标记4的位置时，会执行characters(char[] ch, int start, int length)这个方法，而characters(....)方
法判断preTag!=null，会执行if判断的代码，这样就会把空值赋值给book，这不是我们想要的。*/
}

@Override
public void startDocument() throws SAXException {
list=new ArrayList<Person>();

}

@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
if("person".equals(qName))
{
p=new Person();
}
preTag=qName;

}

}

}