public static String getRequest(String url,String username, String password){
  HttpClient httpclient = new DefaultHttpClient();
     HttpResponse response;
     String responseString="";

  try {
   String authorization = android.util.Base64.encodeToString((username+":"+password).getBytes("UTF-8"),android.util.Base64.NO_WRAP);
   HttpGet httpGet = new HttpGet(url);
   httpGet.setHeader("Content-Type", "application/json");
   httpGet.addHeader("Authorization", "Basic "+ authorization);
   response = httpclient.execute(httpGet);
   StatusLine statusLine = response.getStatusLine();
   
      if(statusLine.getStatusCode() == HttpStatus.SC_OK){
          ByteArrayOutputStream out = new ByteArrayOutputStream();
          response.getEntity().writeTo(out);
          responseString = out.toString();
          out.close();
      } 
      else{
          response.getEntity().getContent().close();
          throw new IOException(statusLine.getReasonPhrase());
      }
  } 
  catch (ClientProtocolException e) {
   e.printStackTrace();
  } 
  catch (IOException e) {
   e.printStackTrace();
  }
     
     return responseString;
 }