One LinearLayoutManager is only for one RecyclerView?

Question

I am building an app having three RecyclerView in one fragment to show horizontal list of items. i created a LinearLayoutManager object and set it to all three RecyclerView . but it crashes app, saying one LinearLayoutManager can attached to only one RecyclerView .why can't i attach to all although i need the same Properties. code is ..

LinearLayoutManager llm = new LinearLayoutManager(getActivity());
        llm.setOrientation(LinearLayoutManager.HORIZONTAL);
        recViewTopSell.setLayoutManager(llm);
        recViewBrands.setLayoutManager(llm);
        recViewCategory.setLayoutManager(llm);

error at

 recViewBrands.setLayoutManager(llm);
            recViewCategory.setLayoutManager(llm);

You can not attach the same layout manager to multiple recycler views. — David Medenjak, Apr 21 '16 at 10:27
why ? that i am asking why cant i attach. it is just an object with properties and i want the same properties object for other RecyclerView. so why i have to make other objects — Adnan Ali, Apr 21 '16 at 10:32

score 0 · Answer 1 · answered Apr 21 '16 at 10:29

0

No it can't be reused like that. The LayoutManager, LinearLayoutManager in your case, contains state specific to RecyclerView it is used with.

If there is a lot of setup involved for the three different LayoutMangers, consider a createLayoutManager() method to call three times instead.

answered Apr 21 '16 at 10:29

Mattias Isegran Bergander

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how to use createLayoutManager() – Adnan Ali Apr 21 '16 at 10:30
That would be your own method creating and setting up a new instance of a LinearLayoutManager – Mattias Isegran Bergander Apr 21 '16 at 11:59

score -1 · Answer 2 · answered Apr 21 '16 at 10:45

-1

Following Mattias answer do this:

    recViewTopSell.setLayoutManager(newLLM());
    recViewBrands.setLayoutManager(newLLM());
    recViewCategory.setLayoutManager(newLLM());

and then:

    private LinearLayoutManager newLLM() {
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity());
        linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
        return linearLayoutManager;
    }

answered Apr 21 '16 at 10:45

Nongthonbam Tonthoi

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i know this can be done but why do i instantiate three objects of LinearLayoutManager . – Adnan Ali Apr 21 '16 at 10:50
Because it is given access to Recycler instance when recycling old views – Nongthonbam Tonthoi Apr 21 '16 at 11:01

One LinearLayoutManager is only for one RecyclerView?

2 Answers2