Comments (7)
cachapa
commented on July 2, 2024
4
@droidluv thanks for the report. I've managed to reproduce the issue (or at least a similar issue) on my side. I'll try to issue a fix as soon as possible.
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Trust-Coder
commented on July 2, 2024
you need to notify the recyclerview that your data is changed so it will reload the updated views. use notifydatasetchanged with the position of item you changed.
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droidluv
commented on July 2, 2024
Its not a data issue, the layout fails to collapse, it will be frozen, and I'm not talking about data update here, its like mentioned if I started collapse or expand action and suddenly scrolled with especially a fling action the layout will bug out and the viewholder will hold out a bugged out version of the expandable layout which will be partially collapsed or expanded and on click will hide its content after a delay but won't collapse, the only solution is to prevent user from scrolling until the expand or collapse animation has completed to prevent the layout from bugging out when being recycled.
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Trust-Coder
commented on July 2, 2024
alright, its because when you scroll the recyclerview, it automatically
removes the scrolled items to save memory and other resources. you should
keep a flag with your viewholder to maintain the status of each item. So
each time a view is loaded, it will set the state of item according to last
time. I built same thing manually last time, so I know the problems here.
in adapter of your recycler view, create an array of booleans to size of
your dataset.
expandedPages = new boolean[size];
@OverRide
public void onBindViewHolder(@nonnull ViewHolder holder, final int position) {
if(expandedPages[position])
{
// set view to expanded
}
else
{
// set to collapsed for safety
}
}
…On Fri, Apr 27, 2018 at 6:48 PM, Sebi Sheldin Sebastian < ***@***.***> wrote:
Its not a data issue, the layout fails to collapse, it will be frozen, and
I'm not talking about data update here, its like mentioned if I started
collapse or expand action and suddenly scrolled with especially a fling
action the layout will bug out and the viewholder will hold out a bugged
out version of the expandable layout which will be partially collapsed or
expanded and on click will hide its content after a delay but won't
collapse, the only solution is to prevent user from scrolling until the
expand or collapse animation has completed to prevent the layout from
bugging out when being recycled.
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droidluv
commented on July 2, 2024
I think you're confused with what I am saying, lets make it a bit more clear, if a view holder containing a swipe view layout is getting recycled when its collapsing or expanding (suppose the collapse time is 1 second because the content is large), during that time the swipe view layout has a freeze issue where it will freeze out part way, and nothing, even calling collapse() or expand() makes it animate anymore, but it will hide its content when calling collapse() and make items visible when calling expand() all the time while being partially open.
I am already maintaining saved states to preserve which position(s) needs to be expanded and collapsed
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pdadmehr
commented on July 2, 2024
@cachapa, Is it possible to use the Recycler view with 3 levels? Parent, Child, and Grand Child where expanding parent will reveal all of its children and expanding each of those children will reveal theirs?
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cachapa
commented on July 2, 2024
@pdadmehr honestly I'm not sure. ExpandableLayout wasn't really designed to be nested since it needs to be able to measure its children so it can size itself.
I think it might work but I'd still recommend against it, as I'm afraid performance wouldn't be great. ExpandableLayout requests layout rebuilds on every frame when expanding or contracting, so its children should be as simple as possible.
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