Hacer una petición HTTP POST en Android

public void saveDni(String id, String dni) {     
 
	HttpClient httpclient = new DefaultHttpClient();     
	HttpPost httppost = new HttpPost("http://www.yoursite.com/script.php");      
 
	try {         
		//Añade las variables a enviar por post         
		List<NameValuePair> postValues = new ArrayList<NameValuePair>(2);         
		postValues.add(new BasicNameValuePair("id", "000001"));         
		postValues.add(new BasicNameValuePair("dni", "23234345T"));         
 
		httppost.setEntity(new UrlEncodedFormEntity(postValues));          
 
		//Hace la petición         
		HttpResponse response = httpclient.execute(httppost);              
	} 
	catch (ClientProtocolException e) {         
		//TODO Auto-generated catch block     
	} 
	catch (IOException e) {         
		//TODO Auto-generated catch block     
	} 
}