ID: cc.cmyes.gcm
Version: 1.0
Size: 0 Mb
Android Version: 2.2 and up
雲端 Push Notifications 即時推播訊息 Screen Preview
What's new in 雲端 Push Notifications 即時推播訊息 1.0
GCM應用程序是基於谷歌雲端通訊平台,通知用戶當前的更新或產品促銷,非常迅速替代傳統簡訊/短信服務的使用數據服務（GPRS/3G/CDMA/WIFI）。因此，它提供具有成本效益的解決方案，讓您的客戶或用戶被通知幾乎是免費的。
如有查詢，email : cmyes2013@gmail.com
Google 雲端通訊 (Google Cloud Message, GCM)
是由 Google 提供一項免費的服務，開發人員可透過該服務將伺服器中
的資料傳送給 Android 應用程式使用。可傳遞 4KB 的輕量資料訊息。[26]
GCM 的優缺點:
GCM 的優點是
由 Google 提供的免費服務，簡單就可傳送訊息，無須佈署伺
服器就可使用。
缺點是：
只可使用 Android 作業系統的 App 接收訊息。
發送訊息的限制只可傳遞 4KB 大小的訊息。
有節流的機制，一次發送訊息給太大量的 Android 裝置，訊息就會直接
被丟棄。
雲端 Push Notifications 即時推播訊息 Permissions
View network connections - allows the app to view information about network connections such as which networks exist and are connectedPrevent device from sleeping - allows the app to prevent the device from going to sleep
Find accounts on the device - allows the app to get the list of accounts known by the device. this may include any accounts created by applications you have installed
Receive data from internet - allows apps to accept cloud to device messages sent by the app's service. using this service will incur data usage. malicious apps could cause excess data usage
Full network access - allows the app to create network sockets and use custom network protocols. the browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet
Control vibration - allows the app to control the vibrator
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