android - How to create a shared variable between fragments in kotlin

Question

currently, my Kotlin based application consists of a single activity, 3 fragments and a navigation (with navigation drawer) between them.

How do I add a variable, which will be initialized in the start of the application, will be visible in all fragments, and can be updated in one of them? a simple int or string for that matter so it should be with little overhead as possible, yet i'd like to follow correct coding conventions. Please elaborate on the correct function to perform the initial variable value, how to bind each fragment textview to it, and the correct way to set the new value.

Thanks!

question from:https://stackoverflow.com/questions/65882249/how-to-create-a-shared-variable-between-fragments-in-kotlin

Answer 1

Create ViewModel and fragments use viewmodel like this

val viewModel: YourViewModel by activityViewModels()

in that case your viewmodel's scope is the same as activity scope. For more information please refer to this link