Expand groups for the first time in onCreateGroupViewHolder() about expandable-recycler-view HOT 5 CLOSED

@HoLuong0211 I would recommend using one of the adapter.toggleGroup() methods to toggle a group. This will ensure the expandCollapseController is aware of the expanded / collapsed state of all groups. The adapter uses this class to determine whether to call expand or collapse animations. So if that controller becomes out of sync, that is one reason why you might be seeing the wrong animations being called.

from expandable-recycler-view.

@mandybess I replaced onGroupClick(holder.getAdapterPosition()); method by toggleGroup(holder.getAdapterPosition()) but it still the same, my indication arrow still not animate the right way.
Could you please explain with a little more detail about your idea for this issue.

Thank you for your help!

from expandable-recycler-view.

If you are calling this method inside onCreateGroupViewHolder then all of the work is being executed before the group click listener is applied to the group view holder. That might be why you are experiencing some weirdness. I would recommend calling toggleGroup after the adapter has had a chance to create and bind all view holders

from expandable-recycler-view.

@mandybess I moved all code from ChatGroupAdapter to my Activity:

List<ParentExpandable> expandableList = getListChatGroup(); final ChatGroupAdapter adapter = new ChatGroupAdapter(this, expandableList); recyclerView.setLayoutManager(layoutManager); recyclerView.setAdapter(adapter); if (adapter.getGroups().size() > 0) { new Handler().postDelayed(new Runnable() { @Override public void run() { for (int i = 0; i < adapter.getGroups().size(); i++) { ChatGroupParentVH holder = (ChatGroupParentVH) recyclerView.getChildViewHolder(recyclerView.getChildAt(i)); adapter.toggleGroup(holder.getAdapterPosition()); holder.expand(); } } }, 1000); }

The group items was expanding for the first time and the indication arrow animate the right way, but when I click on the indication arrow for the second time it still when to ChatGroupParentVH.expand() method.
Or maybe I didn't get your idea. Could you please explain your solution for this issue.

Thank you so much!

from expandable-recycler-view.

I have solution for you @HoLuong1609

Step 1: after recyclerView.setAdapter(adapter); Please set adapter.toggleGroup()
Step 2: In function onBindGroupViewHolder of Adapter please check:

boolean isExpand = isGroupExpanded(flatPosition);
if(group instanceof ChatGroupParentVH){
         if(isExpand){
               ((ChatGroupParentVH) holder).animateExpand(0);
         }else {
               ((ChatGroupParentVH) holder).animateCollapse(0);
         }
 }

You can reference the code of animateExapand in below

public ObjectAnimator createRotateAnimator(final View target, final float from, final float to, int duration) {

        ObjectAnimator animator = ObjectAnimator.ofFloat(target, "rotation", from, to);
        animator.setDuration(duration);
        animator.setInterpolator(Utils.createInterpolator(Utils.LINEAR_INTERPOLATOR));
        return animator;

}
private void animateExpand(int duration) {
        createRotateAnimator(view, 0f, 180f,duration).start();
}

private void animateCollapse(int duration) {
        createRotateAnimator(view, 180f, 0f,duration).start();
}

It's worked for me

from expandable-recycler-view.