Managing Online Presence in Cloud Firestore

问题

In Firebase Realtime Database, we can easily manage User presence by keeping a reference to a node and updating it as shown below:

DatabaseRef presenceRef = FirebaseDatabase.getInstance().getReference("disconnectmessage");

presenceRef.onDisconnect().setValue("I disconnected!");

If I want to do the same in Cloud Firestore, is there any way to achieve it?

回答1:

You can easily use both Cloud Firestore and Realtime Database in the same project. For presence, we recommend you still use the Realtime Database to handle it.

来源：https://stackoverflow.com/questions/46582975/managing-online-presence-in-cloud-firestore