Hello everyone, is there a way to make paging disp...

# android-architecture

[Sergio C.]

Hello everyone, is there a way to make paging display always a fixed number of items? I have a Realtime database which can reach thousands of items so it's not good idea to keep loading items to memory and make the app slow. Also I need to search/filter items by phone number in the entire list from the Realtime database. Is there something like this already done? How could I do this?

I'm thinking of using Room to store all the items from DB so I can search easily. Now the part of keeping a fixed number of elements in the pager I don't have an idea.

[Javier]

pager is a recyclerview so even you adding 1000 items to it, it will only load the visible ones

[Javier]

you can just try the performance if you want adding any number of items to a recyclerview

[Scott Kruse]

If itemsShown.size >= yourMax // don’t fetch more data

[Sergio C.]

no, when filling the adapter with thousands of items it's very slow! locking the entire UI.

[Scott Kruse]

Yeah you shouldn’t do that

[Sergio C.]

The problem is, there is no API to paginate Firebase Realtime Database data and also maintain the real-time update on the items displayed.

[Sergio C.]

Anyone done something like this?

[eneim]

Have you tried this https://github.com/firebase/FirebaseUI-Android/blob/master/database/README.md#using-the-firebaserecyclerpagingadapter ?

[Sergio C.]

Thanks. I've tried the sample but we don't get auto updates on the data anymore if we enable paging.