HTTP POST连接出错

我正在使用一个类来使用HTTPPOST&通过php/json从数据库中获取数据并将其转换为字符串。

问题是我LogCat中的"Error in http connection android.os.NetworkOnMainThreadException"。我正在模拟器上测试这一点，并使用正确的端口地址。我知道这一点是因为端口在应用程序的其他部分（从Localhost加载HTML）中运行良好。如果我在桌面浏览器中运行php文件，它运行得很好。我也知道权限在mySQL 10.0.2.2&php登录文件中的用户集。

所以我的问题是：有人遇到过同样的问题吗？如果有，你有没有弄清楚问题是什么，或者我还应该寻找什么？

谢谢你的帮助！

public void loadQuery(String p) {
        String qO = getIntent().getStringExtra("QUERY_ORDER");
        ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
        // http post
        try {
            HttpClient httpclient = new DefaultHttpClient();
            // HttpPost httppost = new HttpPost("http://10.0.2.2/Andaero/php/" +
            // p + qO + ".php");
            //Hard coded the php link to make sure -->
            HttpPost httppost = new HttpPost(
                    "http://10.0.2.2/Andaero/php/regulatory_list_ASC.php");
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
            HttpResponse response = httpclient.execute(httppost);
            HttpEntity entity = response.getEntity();
            is = entity.getContent();
        } catch (Exception e) {
            Log.e("log_tag", "Error in http connection " + e.toString());
        }
        // convert response to string
        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    is, "iso-8859-1"), 8);
            sb = new StringBuilder();
            sb.append(reader.readLine() + "'n");
            String line = "0";
            while ((line = reader.readLine()) != null) {
                sb.append(line + "'n");
            }
            is.close();
            result = sb.toString();
        } catch (Exception e) {
            Log.e("log_tag", "Error converting result " + e.toString());
        }
        setListAdapter(new QueryAdapter(this, result));
    }