Android gcm 通知有效负载与数据有效负载？

Question

根据 https://developers.google.com/cloud-messaging/server-refgcm 消息可以有通知负载或/和数据负载这两者有什么区别？

Answer 1

阅读您发送的链接在 Payload section 下进行了解释

Payload

Optional. If you are including a payload in the message, you use the data parameter to include your custom key/value pairs. The client app handles the data payload for display or other processing purposes.

The notification parameter with predefined options indicates that GCM will display the message on the client app’s behalf if the client app implements GCMListenerService on Android, or if the notification message is sent to an iOS device. This applies for both HTTP and XMPP.

The app server can send a message including both notifications and data payloads. In such cases, GCM handles displaying the notification payload and the client app handles the data payload.

See the Server Reference for details on sending and receiving messages.