android POST

String url = "http://sgame.baidu.com/vertify_session.xhtml"; 
					        // 第一步，创建HttpPost对象 
					        HttpPost httpPost = new HttpPost(url); 
					 
					        // 设置HTTP POST请求参数必须用NameValuePair对象 
					        List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>(); 
					        params.add(new BasicNameValuePair("apiKey", LibClient.appid)); 
					        params.add(new BasicNameValuePair("sessionId", sessionID)); 
					        params.add(new BasicNameValuePair("sign", MD5(LibClient.appkey+LibClient.appid+sessionID))); 
					 
					        Log.d("params",params.toString());
					        
					        HttpResponse httpResponse = null; 
					        try { 
					            // 设置httpPost请求参数 
					            httpPost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8)); 		           
					            httpResponse = new DefaultHttpClient().execute(httpPost); 
					            //System.out.println(httpResponse.getStatusLine().getStatusCode()); 
					            if (httpResponse.getStatusLine().getStatusCode() == 200) { 
					                // 第三步，使用getEntity方法活得返回结果 
					                String result = EntityUtils.toString(httpResponse.getEntity()); 
					                System.out.println("result:" + result); 
					            } 
					        } catch (ClientProtocolException e) { 
					            e.printStackTrace(); 
					        } catch (IOException e) { 
					            e.printStackTrace(); 
					        }