If the Firebase package is not included with the app by default, could creating / using a custom framework have a similar feature set as Firebase? Or is Firebase integrated within the Android Operating System in some way that is external from an app?
推荐答案
所以这取决于你的要求.因此，如果您只想发送普通通知，那么我真的可以推荐 PushBots.
So it depends on your requirements. So if you want to just send normal notifications, then I can really recommend the PushBots.
但如果你想创建额外的功能，比如不可见的数据负载，你可能必须使用 FCM.
But if you want to create extra features like invisible data payload, you probaly have to use FCM.
