Android : how can i convert the JSON data fetched from web service and display in my app?

i have called the web service but the data received is in json format any help would be appreciated

              URL url = new URL(urls[0]);
              URLConnection conn = url.openConnection(); 
              conn.setDoOutput(true); 

              OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream()); 
              wr.write( data ); 
              wr.flush(); 

              reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
              StringBuilder sb = new StringBuilder();
              String line = null;

                while((line = reader.readLine()) != null)
                    {
                           sb.append(line + " ");
                    } 
               Content = sb.toString();