webview not working with query parameter code example

Example: webview not working with query parameter

StringBuffer buffer=new StringBuffer("http://stage.realtylog.net/iPhone/functions.php");
buffer.append("?username="+URLEncoder.encode("xxxxxxx"));
buffer.append("&id="+URLEncoder.encode("xxxxxxxx"));
buffer.append("act="+URLEncoder.encode("readFileAndPrint"));
webView.loadUrl(buffer.toString());