i am new at programming and i need some help with that please =/

web service is already written but not by me. so all i have to do is send xml as document object by post method through web service.

my code:

public class send extends application {

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);

        HttpClient httpclient = new DefaultHttpClient();  
        HttpPost httppost = new HttpPost("http://app.local/test/");

        try {
            DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();  
            DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();  
            Document document = documentBuilder.newDocument();  
            Element rootElement = document.createElement("packet");  
            rootElement.setAttribute("version", "1.2");  
            document.appendChild(rootElement);  

            Element em = document.createElement("imei");  
            em.appendChild(document.createTextNode("000000000000000"));  
            rootElement.appendChild(em);  

            em = document.createElement("username");   
            em.appendChild(document.createTextNode("5555"));  
            rootElement.appendChild(em);  

            HttpResponse response = httpclient.execute(httppost); 

        } catch (Exception e) {
            System.out.println("XML Pasing Excpetion = " + e);
        }
    }

}