Android-Firebase Offline Best Practices

Chandra Sekhar

I've been understanding the concept of taking Firebase App offline. According to the documentation, we need to call:

FirebaseDatabase.getInstance().setPersistenceEnabled(true);

But where should we call it? Should it be used in every activity of the application? Because, when I use this method in onCreate() method of Application class, my application crashes continuously.

So the best practice we should follow is to take our app offline.

Another doubt is the difference between the above twoDatabaseReference.keppSynced(true);

Chris Conway

setPersistenceEnabled()Should be called once at startup, before retrieving the first reference to the database. call me directly after i callFIRApp.configure()

Enable persistence to retain information completely offline. An important part of this is that offline requests and updates will complete even if you force close and reopen the app. If you're looking for offline access, you need to set a boolean.

You can use Keep Sync if you want to cache the latest data each time you retrieve information, but don't necessarily need to restore that data the next time you open the app.

A good example of use is if you have a view that accesses details of logged in users. Instead of having to use user details listeners on all views that use these details, you can just specify to keep that database reference in sync and get the latest data faster.

More details about persistence and sync can be read in the Firebase documentation : https://firebase.google.com/docs/database/android/offline-capabilities

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