Xamarin Android Rest API to PassSlot - nameResolutionFailure

Question

我使用REST API访问PassSlot，试图生成通行证/优惠券。似乎当我运行程序时，我得到了一个错误："Error: NameResolutionFailure“。

我有：

public static async Task<string> SendAndReceiveJsonRequest()
        {
            string responseStr = null;
            string uri = "https://api.passslot.com/v1/templates/my-template-ID/pass";

            // Create a json string with a single key/value pair.

            var json = new JObject (new JProperty ("lastName", lastName),
                                    new JProperty ("firstName", firstName),
                                    new JProperty ("percentOff", percentOff),
                                    new JProperty ("offerDescription", offerDescription),
                                    new JProperty ("entityName", entityName),
                                    new JProperty ("expiry", expiry));

            //Console.WriteLine ("Jake's JSON " + json.ToString ());

            using (var httpClient = new HttpClient ())

            {    

                httpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("My-Key-Here-xxx-xxx-xxx");
                //create the http request content

                HttpContent content = new StringContent(json.ToString());


                try
                {
                    // Send the json to the server using POST

                    Task<HttpResponseMessage> getResponse = httpClient.PostAsync(uri, content);
                    // Wait for the response and read it to a string var

                    HttpResponseMessage response = await getResponse;
                    responseStr = await response.Content.ReadAsStringAsync();

                }
                catch (Exception e)
                {
                    Console.WriteLine("Error communicating with the server: " + e.Message);
                }
            }

            return responseStr;
        }

我是通过Nexus 4在Android 4.4上运行这个程序的，我用的是3G (不是wifi)。

任何关于这里可能发生的事情以及为什么我会收到错误的提示。

Answer 1

如果url请求在本地网络中，请检查主机设备中是否设置了url ip (智能手机、平板电脑的 hosts 设置，无论您用来测试什么)

警局。要在安卓系统中编辑主机设置设备，您可以使用此应用程序https://play.google.com/store/apps/details?id=com.nilhcem.hostseditor