In android i am creating thread for url connection.Inside the thread i store the response message in a string which is globally declared.When I access the method method it returns null. 

```
    public class Rate_fetch {
       String total="";
          public String  rate(String dt)
       {
    new Thread(new Runnable(){ 

         public void run(){

            try  {

             URL url = new URL(tally_ipaddr+"/prorate.jsp?plist="+sss.toString().trim());

             HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
             InputStream in = new BufferedInputStream(urlConnection.getInputStream());
             BufferedReader r = new BufferedReader(new InputStreamReader(in));
             String x = "";
             String total = "";
             x = r.readLine();
             int i=0;

             while(x.length()>1)
             {
                 total=total+x.toString().trim();
                 i++;
                 x = r.readLine();
             }
             }
            catch(Exception e){
             return e.toString();
            }   
        }    

    }).start();

    return total;

}

```

When i call the method it returns null.

```
 Rate_fetch rf=new Rate_fetch();
      String amt= rf.rate(prodList);

```