What is reference in Firebase?

From the point of view of an Android app, a Firebase database is represented by an instance of the FirebaseDatabase class, a reference to which is obtained via a call to the getInstance() method of the class , for example: FirebaseDatabase database = FirebaseDatabase.

References are lightweight, so you can create as many as you need, and they are also reusable for multiple operations. To create a reference, get an instance of the Storage service using getStorage() then call ref() with the service as an argument . This reference points to the root of your Cloud Storage bucket.

A Firebase reference represents a particular location in your Database and can be used for reading or writing data to that Database location . This class is the starting point for all Database operations.23 Haz 2021

To create a reference to a database on another server