我知道在发布消息后谷歌将发回消息ID,这并不意味着该消息已经传递给设备.
无论如何在FCM接收已发送通知的送达报告？
解决方法
是的,message_id仅标识消息已成功传递到FCM服务器.
我认为你在寻找的是Delivery Receipts：
Delivery Receipt: If the app server included
delivery_receipt_requestedin the downstream message,the XMPP connection server sends a delivery receipt when it receives confirmation that the device received the message.
