Firebase Realtime database, how to notify there is no data in a reference-CodePudding

I am trying to implement a clean way of notifying my UI that there is no data. It's more like a listener that check that there is network connection but no data at that location. How do I do this? I have tried 998 ways :(, they all work but the complexity of implementing them in every class that listens for data is giving me nausea. Thanks for your reply.

CodePudding user response：

You can simply check for the snapshot object if it's null then there is no data at that particular reference node like this:

anyRef.get().addOnSuccessListener(snapshot -> {
    if (snapshot != null) {
        // data exists
    } else { 
        // data doesn't exist 
    }
}