网络编程中的xml解析案例

package com.gyarmy.xmlweather;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

import org.xmlpull.v1.XmlPullParser;

import com.gyarmy.xmlweather.domain.Product;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.util.Xml;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {
	protected static final int SUCCESS = 0;
	protected static final int ERROR = 1;
	protected static final int NETWORK_ERROR = 2;
	private EditText city_code;
	private TextView city_name;
	private TextView city_wendu;
	private TextView city_fengxiang;
	private String path;
	
	private Handler mHandler=new Handler(){
		public void handleMessage(android.os.Message msg) {
			
			switch (msg.what) {
			case SUCCESS:
				Product p = (Product)msg.obj;
				city_name.setText(p.getCity());
				city_wendu.setText(p.getWendu());
				city_fengxiang.setText(p.getFengxiang());
				break;
			case ERROR:
				
				break;
			case NETWORK_ERROR:
				
				break;
				
			default:
				break;
			}
			
		};
	};
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		city_code = (EditText)findViewById(R.id.city_code);
		city_name = (TextView)findViewById(R.id.city_name);
		city_wendu = (TextView)findViewById(R.id.city_wendu);
		city_fengxiang = (TextView)findViewById(R.id.city_fengxiang);
		
	}
	
	public void getResult(View v){
		String code_data = city_code.getText().toString().trim();
		path = "http://wthrcdn.etouch.cn/WeatherApi?citykey="+code_data;
		
		new Thread(){
			public void run() {
				try {
					URL url = new URL(path);
					HttpURLConnection conn = (HttpURLConnection)url.openConnection();
					conn.setConnectTimeout(2000);
					conn.setRequestMethod("GET");
					int code = conn.getResponseCode();
					if(200 == code){
						InputStream in = conn.getInputStream();
						XmlPullParser parser = Xml.newPullParser();
						parser.setInput(in, "UTF-8");
						
						int eventType = parser.getEventType();
						Product p = new Product();
						
						while(eventType != parser.END_DOCUMENT)
						{
							if("city".equals(parser.getName()))
							{
								p.setCity(parser.nextText());
							}else if("wendu".equals(parser.getName())){
								p.setWendu(parser.nextText());
							}else if("fengxiang".equals(parser.getName())){
								p.setFengxiang(parser.nextText());
							}
							
							eventType = parser.next();
						}
						
						Message msg = Message.obtain();
						msg.obj = p;
						msg.what = SUCCESS;
						mHandler.sendMessage(msg);
						
					}else{
						
						Message msg= Message.obtain();
						msg.what = ERROR;
						mHandler.sendMessage(msg);
						
					}
					
					
				} catch (Exception e) {
					
					// TODO Auto-generated catch block
					Message msg= Message.obtain();
					msg.what = NETWORK_ERROR;
					mHandler.sendMessage(msg);
					
					e.printStackTrace();
				}
			};
			
		}.start();
		
	}
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}