XMl的解析

MainActivity
package com.example.secondweek_test2;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
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 com.example.utils.NetWorkUtil;

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

public class MainActivity extends Activity {

	private static final String ENDURL="http://10.1.2.175:8080/Day05_UrlCon/data.xml";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //初始化数据
        init();
    }

	private void init() {

		/**
		 * 请求服务器中xml文件
		 */
		//判断网络是否开通
		if(NetWorkUtil.isAvailbale(MainActivity.this))//开通网络了
		{
			//请求网络数据
			new MyAsyncTask().execute(ENDURL);

		}

	}

	class MyAsyncTask extends AsyncTask<String, Integer, InputStream>{

		private List<Foods> list;
		private String tag;
		private Foods f;

		//耗时操作
		@Override
		protected InputStream doInBackground(String... params) {

			//向服务器请求数据
			String url=params[0];
			 InputStream byClient = NetWorkUtil.getDataByClient(url);
			System.out.println(byClient);
			return byClient;
		}

		//更新UI
		@Override
		protected void onPostExecute(InputStream result) {

			parserXml(result);

			System.out.println(list.toString());
			super.onPostExecute(result);
		}

		private void parserXml(InputStream result) {
			//解析请求的数据
			XmlPullParser parser=Xml.newPullParser();//获取解析器

			try {
				parser.setInput(result, "utf-8");
				// 触发第一次事件
				int type = parser.getEventType();

				// 循环遍历
				while (type != XmlPullParser.END_DOCUMENT)// 筛选的条件是不为结束文档
				{
					// 判断类型
					switch (type) {
					case XmlPullParser.START_DOCUMENT://开始文档

						//创建集合对象
						list = new ArrayList<Foods>();						

						break;

					case XmlPullParser.START_TAG://开始标签

						//记录标签的名字
						tag = parser.getName();

						//判断是否为person
						if(tag.equals("cate"))
						{
							//创建对象
							f = new Foods();

							//获取属性值
							String id = parser.getAttributeValue(0);

							System.out.println(id);
							//为person对象赋值
							f.setId(Integer.parseInt(id));
						}

						break;
					case XmlPullParser.TEXT://文本标签

						//获取文本标签的值
						String text=parser.getText();

						//判断文本标签是什么

							if(tag.equals("cateurl"))
							{
								f.setCateurl(text);

							}else if(tag.equals("catetitle")){
								f.setCatetitle(text);
							}else if(tag.equals("catecontent")){
								f.setCatecontent(text);
							}else if(tag.equals("cateprice")){
								f.setCateprice(text);
							}

						break;
					case XmlPullParser.END_TAG://结束标签

						 //记录结束标签的名字
						tag=parser.getName();

						//判断标签是扫描
						if(tag.equals("cate"))
						{
							//向集合中添加对象
							list.add(f);

							//将person对象制空
							f=null;
						}

						tag="";
						break;
					case XmlPullParser.END_DOCUMENT://结束文档

						break;
					}

					type=parser.next();//触发下一次事件
				}
			} catch (XmlPullParserException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

}

　　

网络请求
package com.example.utils;

import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.util.EntityUtils;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

public class NetWorkUtil {
/*
	private static BufferedInputStream is;*/
	static InputStream is;

	public static boolean isAvailbale(Context context) {
		// 获取网络的服务器
		ConnectivityManager manager = (ConnectivityManager) context
				.getSystemService(Context.CONNECTIVITY_SERVICE);

		// 获取网络信息
		NetworkInfo info = manager.getActiveNetworkInfo();

		if (info == null || !info.isAvailable()) {
			return false;
		}

		return true;

	}

	public static InputStream getDataByClient(String url) {
		// 获取get请求对象
		HttpGet get = new HttpGet(url);

		// 设置参数
		HttpParams params = new BasicHttpParams();
		HttpConnectionParams.setConnectionTimeout(params, 5000);
		HttpConnectionParams.setSoTimeout(params, 5000);

		// 获取执行请求的对象
		HttpClient client = new DefaultHttpClient(params);

		// 执行请求
		try {
			HttpResponse resp = client.execute(get);

			// 判断响应是否成功
			if (resp.getStatusLine().getStatusCode() == 200) {
				// 获取响应的数据
				HttpEntity entity = resp.getEntity();

				is= entity.getContent();
				/*is = new BufferedInputStream(
						new DataInputStream());*/

			}
		} catch (ClientProtocolException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return is;
	}

}