android采用http post的方法去连接服务器的有关问题

String uriPath = "http://192.168.1.82:8088/UserApp.ashx";        InputStream result = null;        HttpPost post = new HttpPost(uriPath);        List<BasicNameValuePair> list = new ArrayList<BasicNameValuePair>();        // 构建表单字段内容        for (Entry<String, Object> entry : params.entrySet()) {            list.add(new BasicNameValuePair(entry.getKey(), entry.getValue() + ""));        }        try {            post.setEntity(new UrlEncodedFormEntity(list, HTTP.UTF_8));            //post.addHeader("do", "Login");                        HttpClient client = new DefaultHttpClient();            client.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, CONSTANT.CONNECTION_TIMEOUT);            client.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, CONSTANT.SO_TIMEOUT);                        HttpResponse response = client.execute(post);            //response.addHeader("Accept", "application/xml");                        if (CONSTANT.CODE_200 == response.getStatusLine().getStatusCode())                result = response.getEntity().getContent();        }        catch (ClientProtocolException e) {            e.printStackTrace();        }        catch (IOException e) {            e.printStackTrace();        }                 if(result.equals(null))        {            Log.v("webserver", "多半没有取到数据");        }        else            Log.v("webserver", "有数据咯");        BufferedReader bf = new BufferedReader(new InputStreamReader(result));        String s = null;        try {            s = bf.readLine();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        Log.v("webserver", s);