How to organize a shopping cart in an android app?

Question

Android

Hey!
How to properly organize a shopping cart in an android application?
I imagine this: I
create a cart class , then, when switching from different activities, I pass the cart state data through putExtra. Number of goods, product codes, all sorts of dates.
If in one activity the cart is replenished with goods, then I return the already changed data, etc.
Or is there a more or less correct approach than using putExtra everywhere?
PS fragments are not used in the application.
Thanks...

Answer 1

Well, if the cart is an entity that goes through all activities (or most) - then make it a regular class, and store its instance in Application. Or even a singleton (although the instantiation will most likely remain in Application, but access will be simpler).