RecyclerView with expandable items

Question

I need to make an expandable RecyclerView, with only one opened item per click (all others must close). I know there is possibility to do this with the help of ExpandableListView and then use next code:

elv.setOnGroupExpandListener(new OnGroupExpandListener() {

    @Override
    public void onGroupExpand(int groupPosition) {
            if (lastExpandedPosition != -1
                    && groupPosition != lastExpandedPosition) {
                elv.collapseGroup(lastExpandedPosition);
            }
            lastExpandedPosition = groupPosition;
    }
});

but is there the way to make the same with using RecyclerView?

I think this may help you http://stackoverflow.com/questions/26419161/expandable-list-with-recyclerview http://stackoverflow.com/questions/27203817/recyclerview-expand-collapse-items — Mauricio Flores, Sep 18 '15 at 07:22

Olcay Ertaş · Accepted Answer · 2015-09-18T15:09:08.853

3

Here is a nice tutorial for expending RecyclerView from Big Nerd Ranch

Summary:

Define two layouts: One for parent items and one for child items.
Define two ViewHolders for these layouts.
Define two classes for parent and child objects.
Parent object has to implement ParentObject interface.
Define custom adapter.
Call setParentAndIconExpandOnClick(true) on adapter.

For only one expanded view at a time, you can keep track of the last expanded view and close it when user cliced new one.

edited Sep 18 '15 at 15:09

answered Sep 18 '15 at 08:57

Olcay Ertaş

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It just links to BigNerdRanch, not to the tutorial. But you are probably gonna link the same link I added. – Marko Sep 18 '15 at 08:58
Sorry, forgot to add actual link :) – Olcay Ertaş Sep 18 '15 at 09:06
You are faster than me. I didn't notice your answer :) – Olcay Ertaş Sep 18 '15 at 09:14
thanks, but is there is some way to close all other items when one is open? – Stan Malcolm Sep 18 '15 at 14:45
There is no default way. You have to keep list of expanded objects and close previous one when new one clicked. – Olcay Ertaş Sep 18 '15 at 15:07
Here's the way to easily track and implement only one open item per click http://stackoverflow.com/a/40698779/3237960 – Rahul Nov 19 '16 at 22:53

cw fei · Answer 2 · 2015-09-18T07:28:21.647

0

You can do it by using some libraries, I'll recommend Advanced RecyclerView

edited Sep 18 '15 at 07:28

answered Sep 18 '15 at 07:17

cw fei

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score 0 · Answer 3 · answered Sep 18 '15 at 07:19

0

Take a look at Advanced RecyclerView. And here is the example of expandable item.

answered Sep 18 '15 at 07:19

mr.icetea

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score 0 · Answer 4 · answered Nov 19 '16 at 22:51

Here's the way of tracking and implementing only one open item per click if using Expandable RecyclerView form big nerd ranch-

      Stack<Integer> mStack = new Stack<>();

     mRecyclerViewAdapter.setExpandCollapseListener(new ExpandableRecyclerAdapter.ExpandCollapseListener() {
                @Override
                public void onListItemExpanded(int position) {


                    try {
                        int x = mStack.pop();
                        mRecyclerViewAdapter.collapseParent(x);

                    } catch (EmptyStackException ex) {
                    }

                    mStack.push(position);


                }

                @Override
                public void onListItemCollapsed(int position) {

                    try {
                        mStack.pop();
                    } catch (EmptyStackException ex) {
                    }

                }
            });

RecyclerView with expandable items

4 Answers4