urlasync.java

 private class DownloadWebPageTask extends AsyncTask<String, Void, String> {
        @Override
        protected String doInBackground(String... urls) {
	    	String result  = new String();
	        try {
	            URL location = new URL(url);
	            URLConnection connection = location.openConnection();
	            BufferedReader data = new BufferedReader(new InputStreamReader(connection.getInputStream()));
	            String line;
	            while ((line = data.readLine()) != null) {
	            	result = line;
	            }
	        } catch (MalformedURLException e) {
	            // TODO Auto-generated catch block
	            e.printStackTrace();
	        } catch (IOException e) {
	            // TODO Auto-generated catch block
	            e.printStackTrace();
	        }
	        return result;
        }

        @Override
        protected void onPostExecute(String result) {
        	JSONObject json = new JSONObject();
    	    if(result != null){
    	    	try {
    				json = new JSONObject(result);
    			} catch (JSONException e) {
    				// TODO Auto-generated catch block
    				e.printStackTrace();
    			}
    	    }
    	    updateList(json);
    	    ((ArticleListingAdapter) getListAdapter()).notifyDataSetChanged();
        }
      }