Comprehensive Android Developer Bootcamp - Firestore - Creating Documents Using POJO - Plain Old Java Objects

The tutorial explains the transition from using hash maps to creating a model class in Java for better data handling in production applications. It covers the creation of a model class with fields, constructors, and methods, emphasizing the importance of an empty constructor for Firestore. The tutorial demonstrates how to use the journal object in the main activity, replacing hash maps, and concludes with testing the changes to ensure functionality remains intact.

How do you instantiate a new journal object in the main activity?

What method is used to map a document snapshot to the journal class?

What changes were made to improve the way data is added to the collection?