我有一个带有 ASP.NET 后端的 Android 应用程序。我有手机的 registration_id 以及来自谷歌的身份验证令牌，用于执行推送的应用程序服务器。
当我向 C2DM 发出 http 发布请求以便手机收到一条消息时，我不断收到 401 Unauthorized。这是我在 .NET 中提出请求的方式：
WebRequest myRequest = WebRequest.Create("https://android.apis.google.com/c2dm/send");
myRequest.ContentType = "application/x-www-form-urlencoded";
myRequest.Method = "POST";
myRequest.Headers.Add("Authorization", "GoogleLogin auth=" + authId);
// buiold the post string
StringBuilder myPost = new StringBuilder();
myPost.AppendFormat("registration_id={0}", regId);
myPost.AppendFormat("&data.payload={0}", msg);
myPost.AppendFormat("&collapse_key={0}", colKey);
// write the post-string as a byte array
byte[] myData = ASCIIEncoding.ASCII.GetBytes(myPost.ToString());
myRequest.ContentLength = myData.Length;
Stream myStream = myRequest.GetRequestStream();
myStream.Write(myData, 0, myData.Length);
myStream.Close();
// Do the actual request and read the response stream
WebResponse myResponse = myRequest.GetResponse();
Stream myResponseStream = myResponse.GetResponseStream();
StreamReader myResponseReader = new StreamReader(myResponseStream);
string strResponse = myResponseReader.ReadToEnd();
myResponseReader.Close();
myResponseStream.Close();
任何帮助将非常感激。