URLConnection thread class, where I used to handle URLConnections on Android!

URLThread.java

import java.io.*;
import java.net.*;


/**
 * Just make your activity "implements URLThread_CallBack" 
 * ... where URLCallBack(String response) is called after the URLConnection returns a something
 * Just new URLThread("http://google.com", this, "").start() will start a new thread ;)
 */
interface URLThread_CallBack
{
	public void URLCallBack(String response);
}


public class URLThread extends Thread
{
	private String url,POSTdata="";
	private URLThread_CallBack callback;
	public URLThread(String url,URLThread_CallBack callback,String POSTdata)
	{
		this.url=url;
		this.callback=callback;
		this.POSTdata=POSTdata;
	}
	
	@Override
	public void run()
	{
			String res="";
			URL url;
		    HttpURLConnection connection = null;  
		    try {
		      //Create connection
		      url = new URL(this.url);
		      connection = (HttpURLConnection)url.openConnection();
		      connection.setRequestMethod("POST");
		      connection.setRequestProperty("Content-Type", 
		           "application/x-www-form-urlencoded");
					
		      connection.setRequestProperty("Content-Length", "" + 
		               Integer.toString(POSTdata.getBytes().length)); 
					
		      connection.setUseCaches (false);
		      connection.setDoInput(true);
		      connection.setDoOutput(true);

		      //Send request
		      DataOutputStream wr = new DataOutputStream (
		                  connection.getOutputStream ());
		      wr.writeBytes (POSTdata);
		      wr.flush ();
		      wr.close ();

		      //Get Response	
		      InputStream is = connection.getInputStream();
		      byte buff[]=new byte[500];
		      int i;
		      while((i=is.read(buff))>-1)
		    	  		res+=new String(buff,0,i);
		      is.close();
		      
		      if(callback!=null) //still alive?
		    	  	callback.URLCallBack(">"+res);
		      
		    } catch (Exception e) {
		      e.printStackTrace();
		      callback.URLCallBack("Error:"+e.getMessage());
		    } finally {
		      if(connection != null) {
		        connection.disconnect(); 
		      }
		    }
	    
	}
}