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kotlinlang

Hi,
I have a general "architecture" question.
I have tried declarative UI with state on Flutter, I saw that Android is going to do the same in the near future with Compose.
At the moment I have an application using intensive UI with lots of data (when this app was created the recyclerview wasn't used).. Anyway, I am looking for a way to refacto these part, I wanted to know how could I do that?
What I want is something like that: An object that will contains all my user data (eg: "name": "toto") and when the UI of the textinput is on the screen updating the view with this data. And whenever a change occur in the UI, like name now is "tata" I want to update the object. (With states it's ultra simple) But what could I use right now?

It's a trivial example, the current application use multiples tabs with different components (text, spinner, dropdown, image, etc...)