C# · 12月 27, 2021

如何通过GCM在C#.Net上发送Android推送通知

我是所有 Android的GCM推送通知的新手,我已经阅读了堆栈文章,但无法得到一个直接的答案.我也读了 Create push notification in android,以更好地了解GCM如何工作.我也使用了SDK提供的gcm-demo-server和gcm-demo-client.但是,这是我的怀疑和迄今为止所尝试的:

>关于我的链接,具有应用程序的手机注册以获取注册密钥.这是使用相同应用程式的所有手机的唯一键?
>这个注册密钥在任何情况下是否到期? (例如在背景上运行的应用程序)
>假设我有注册码,我已经尝试了以下代码片段,通过GCM将通知推送到我的应用程序.这是写在c#.net上.请让我知道上面提到的是否可以使用以下代码片段来实现:

private string SendGCMNotification(string apiKey,string postData,string postDataContentType = “application/json”) { ServicePointManager.ServerCertificateValidationCallback += new RemoteCertificateValidationCallback(ValidateServerCertificate); // MESSAGE CONTENT byte[] byteArray = Encoding.UTF8.GetBytes(postData); // CREATE REQUEST HttpWebRequest Request = (HttpWebRequest)WebRequest.Create(“https://android.googleapis.com/gcm/send”); Request.Method = “POST”; Request.KeepAlive = false; Request.ContentType = postDataContentType; Request.Headers.Add(string.Format(“Authorization: key={0}”,apiKey)); Request.ContentLength = byteArray.Length; Stream dataStream = Request.GetRequestStream(); dataStream.Write(byteArray,byteArray.Length); dataStream.Close(); // SEND MESSAGE try { WebResponse Response = Request.GetResponse(); HttpStatusCode ResponseCode = ((HttpWebResponse)Response).StatusCode; if (ResponseCode.Equals(HttpStatusCode.Unauthorized) || ResponseCode.Equals(HttpStatusCode.Forbidden)) { var text = “Unauthorized – need new token”; } else if (!ResponseCode.Equals(HttpStatusCode.OK)) { var text = “Response from web service isn’t OK”; } StreamReader Reader = new StreamReader(Response.GetResponseStream()); string responseLine = Reader.ReadToEnd(); Reader.Close(); return responseLine; } catch (Exception e) { } return “error”; }

>有没有手机首先在我们的定制服务器中注册的方式发送推送通知?

解决方法 参考代码: public class AndroidGCMPushNotification{ public AndroidGCMPushNotification() { // // TODO: Add constructor logic here // } public string SendNotification(string deviceid,string message) { string SERVER_API_KEY = “server api key”; var SENDER_ID = “application number”; var value = message; WebRequest tRequest; tRequest = WebRequest.Create(“https://android.googleapis.com/gcm/send”); tRequest.Method = “post”; tRequest.ContentType = ” application/x-www-form-urlencoded;charset=UTF-8″; tRequest.Headers.Add(string.Format(“Authorization: key={0}”,SERVER_API_KEY)); tRequest.Headers.Add(string.Format(“Sender: id={0}”,SENDER_ID)); string postData = “collapse_key=score_update&time_to_live=108&delay_while_idle=1&data.message=” + value + “&data.time=” + System.DateTime.Now.ToString() + “&registration_id=” + deviceid + “”; Console.WriteLine(postData); Byte[] byteArray = Encoding.UTF8.GetBytes(postData); tRequest.ContentLength = byteArray.Length; Stream dataStream = tRequest.GetRequestStream(); dataStream.Write(byteArray,byteArray.Length); dataStream.Close(); WebResponse tResponse = tRequest.GetResponse(); dataStream = tResponse.GetResponseStream(); StreamReader tReader = new StreamReader(dataStream); String sResponseFromServer = tReader.ReadToEnd(); tReader.Close(); dataStream.Close(); tResponse.Close(); return sResponseFromServer; }}

推荐链接:

http://www.codeproject.com/Tips/434338/Android-GCM-Push-Notification