JSON Parsing in Android

try
        {
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost postMethod = new HttpPost("Insert JSON Url");
            BufferedReader in = null;
            BasicHttpResponse httpResponse = (BasicHttpResponse) httpclient.execute(postMethod);
            in = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getContent()));
            StringBuffer sb = new StringBuffer("");
            String line = "";
            while ((line = in.readLine()) != null)
            {
                sb.append(line);
            }
            in.close();
            String result = sb.toString();

            JSONObject resObject=new JSONObject(result);
            String _key =resObject.getString("Insert Json Key");
            Vector _adBeanVector = new Vector();
            JSONArray newsArray = resObject.getJSONArray("Insert Json Array Key");
            if(newsArray.length() > 0)
           {
           for (int i=0;
            i < newsArray.length()
           ; i++)
           {
           Vector _adElementsVector=new Vector();
           JSONObject newsObj = newsArray.getJSONObject(i);
           _adElementsVector.addElement(newsObj.getString("Insert Json Array Element Key1"));
          _adElementsVector.addElement(newsObj.getString("Insert Json Array Element Key2"));
          _adBeanVector.addElement(_adElementsVector);
           }
           }
     }
 catch (Exception e)
{
}