org.apache.http.conn.HttpHostConnectExce?报错

我用AsyncHttpClient上传文件及参数到服务器报错:org.apache.http.conn.HttpHostConnectException: Connection to http://192.168.x.x:8888 refused

我是用真机测试，很奇怪的就用手机的个人热点可以上传成功，但是用办公室的网络就报错

求大神指点,以下是我的代码

AsyncHttpClient client = new AsyncHttpClient();
 client.setConnectTimeout(10000);
        client.setTimeout(10000);
  RequestParams params = new RequestParams();
  params.put("senselogid", senselogid);
            params.put("name", name);
            params.put("age", age);
            params.put("picfile", imgFile);
   
  client.post(url, params, new AsyncHttpResponseHandler() {

            @Override
            public void onSuccess(int statusCode, Header[] headers,
                                  byte[] responseBody) {


}

 @Override
            public void onFailure(int statusCode, Header[] headers,
                                  byte[] responseBody, Throwable error) {

                               Log.e("error", error.toString());

}
}

org.apache.http.conn.HttpHostConnectException: Connection to http://192.168.x.x:8888 refused

求大神解答