我的Android設備正在優化我的應用程序。所以我的應用程序正在後臺休眠,但如果收到優先GCM消息,它應該醒來。 as staten here:GCM優先消息不會喚醒我的應用程序
高優先級。 GCM嘗試立即傳送高優先級消息 ,允許GCM服務在 可能的情況下喚醒睡眠設備,並打開到您的應用服務器的網絡連接。具有 即時消息,聊天或語音呼叫警報的應用程序(例如,通常爲 )需要打開網絡連接,並確保GCM毫不延遲地將 消息傳送到設備。
和here:
GCM被優化以通過裝置的高優先級消息GCM的 打盹和應用待機空閒模式工作。即使用戶的 設備處於打盹模式或應用程序處於App Standby模式,GCM高優先級消息也可讓您可靠地喚醒您的應用以訪問網絡。在待機模式下,系統傳遞消息並給予應用程序 臨時訪問網絡服務和部分喚醒鎖,然後 將設備或應用程序返回到空閒狀態。
我用這個代碼從我的C#服務器發送的優先級的消息到Android設備:
private string SendMessageUsingGCM(String sRegistrationId, string sTextToSend, string sCollapseKey)
{
String GCM_URL = @"https://gcm-http.googleapis.com/gcm/send";
bool flag = false;
string sError = "";
StringBuilder sb = new StringBuilder();
sb.AppendFormat("registration_id={0}&collapse_key={1}", sRegistrationId, sCollapseKey);
sb.AppendFormat("&delay_while_idle=0&priority=high");
sb.AppendFormat("&data.msg=" + HttpUtility.UrlEncode(sTextToSend)); //Para poder enviar caracteres especiales como ä, ë, arábigos...
string msg = sb.ToString();
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(GCM_URL);
req.Method = "POST";
req.ContentLength = msg.Length;
req.ContentType = "application/x-www-form-urlencoded";
req.Timeout = 20000;
req.Headers.Add("Authorization:key=" + MyAthorizationKey);
try
{
using (StreamWriter oWriter = new StreamWriter(req.GetRequestStream()))
{
oWriter.Write(msg);
}
using (HttpWebResponse resp = (HttpWebResponse)req.GetResponse())
{
using (StreamReader sr = new StreamReader(resp.GetResponseStream()))
{
string respData = sr.ReadToEnd();
if (resp.StatusCode == HttpStatusCode.OK) // OK = 200
{
if (respData.StartsWith("id="))
flag = true;
else
sError = respData;
}
else if (resp.StatusCode == HttpStatusCode.InternalServerError) // 500
sError = "Internal server error. Try later.";
else if (resp.StatusCode == HttpStatusCode.ServiceUnavailable) // 503
sError = "Server not available temnporatily. Try later.";
else if (resp.StatusCode == HttpStatusCode.Unauthorized) // 401
sError = "The API Key is not valid.";
else
sError = "Error: " + resp.StatusCode;
}
}
}
catch (WebException e)
{ //The remote server returned an error: (502) Bad Gateway. //Más info: http://stackoverflow.com/questions/2159361/error-502-bad-gateway-when-sending-a-request-with-httpwebrequest-over-ssl
//The remote server returned an error: (500) Internal Server Error. Más info: http://stackoverflow.com/questions/4098945/500-internal-server-error-at-getresponse
sError = "WebException: " + e.ToString();
}
catch (Exception e)
{
sError = "Exception: " + e.ToString();
}
if (flag == true)
return "Ok";
return "Error " + sError;
}
但我的應用程序不會醒來。即使我解鎖設備。
我發現,一旦我的設備「阻止」我的應用程序在優化列表上,那麼我的應用程序將不會收到任何更多消息。這似乎是系統完全殺死了應用程序,它不會收到任何GCM消息。我正在使用帶有棒棒糖的Galaxy S4。任何幫助?
我發現有人在這裏有我同樣的問題:http://developer.samsung.com/forum/board/thread/view.do?boardName=General&messageId=286651&frm=7&tagValue=smartmanager&curPage=1 – Ton