Hi, did anyone worked on Paging 3, i want to know ...

# android

[Kulwinder Singh]

Hi, did anyone worked on Paging 3, i want to know how we can mutate one item from paged list


https://stackoverflow.com/questions/63171749/how-can-we-mutate-items-loaded-using-paging-3-android

[gildor]

I suspect it still immutable, same as Paging 2

[Joost Klitsie]

With paging 2 you have to invalidate the entire list

[Joost Klitsie]

but what you can do is store the list locally, in the paged data source factory for example

[Joost Klitsie]

• pagination data source loads list and keeps reference to all data (in my case the domain objects before mapping to ui friendly objects)
• when you press like button, invalidate the old list
• from the pagination factory, fetch the old data from the invalidated list
• construct new list with passing the old data
• instead of fetching the new data in the initial loading, simply use the old data, which should have the new like state included.

[Joost Klitsie]

If you pass on the new list to the existing paged list adapter (with submitList) then the paged list adapter will use a list differ to update your list

[Joost Klitsie]

so if Paging 3 does this the same as paging 2, then this would be a start 🙂

[Kulwinder Singh]

hmm Yeah, looks like i have to store locally

[Kulwinder Singh]

Paging 3 have RemoteMediator https://developer.android.com/topic/libraries/architecture/paging/v3-network-db maybe this help

[Kulwinder Singh]

i will try this @Joost Klitsie

[Chethan]

Hi @Kuldwinder Singh, Please check my message in the stack over flow
https://stackoverflow.com/a/63187011/1407554