recylerView.getItemCount() return only visible on screen items count

Question

I have a RecylerView I want to change active position items view with using recylerView.findViewHolderForAdapterPosition(position)

my problem starts here

if i scroll to recylerview and position not show on screen i call recylerView.findViewHolderForAdapterPosition(position) and this method return null

How can I load all adapter data once and use

for(i = 0; i<adapter.size(); i++){
     View v = recylerView.findViewHolderForAdapterPosition(position).itemView;
}

on RecyclerView you need to use holder.getAdpaterPosition() and not the position from the function itself — Itzik Samara, Oct 13 '17 at 13:09
you `for loop` always return null because it not contains all view at a single time as per your scroll views are added and removed — Pritesh - ɐʎıɥpɐΛ ɥsǝʇᴉɹꓒ, Oct 13 '17 at 13:11
@pskink I want access all datas views with recylerView.findViewHolderForAdapterPosition(position) but this method return only visible items view others always return null. — Burak Durmuş, Oct 13 '17 at 13:17
@BurakDurmuş **return only visible items view others always return null** because `recyclerview` add only items that are visible in screen when you scroll `Recyclerview` views are added and removed — AskNilesh, Oct 13 '17 at 13:22
@Pritesh-ɥsǝʇᴉɹꓒ I must be change active items view when button pressed. if user change list positon I couldn't access this item. How to fix it. — Burak Durmuş, Oct 13 '17 at 13:27
`I want access all datas views` its not possible - the whole idea of `RecyclerView` is that it recycles views when you scroll its content — pskink, Oct 13 '17 at 13:27

score 0 · Answer 1 · answered Oct 13 '17 at 13:27

To make changes to the RecyclerView, you need to change its Adapter. It is not possible by design to modify the RecyclerView child views by hand.

If you want to change the active position, you could have a int activePosition member in your Adapter and call adapter.notifynotifyDataSetChanged() when you change it.

score 0 · Answer 2 · answered Oct 14 '17 at 10:50

0

recylerView.getAdapter().getCount();

may be it help you.

answered Oct 14 '17 at 10:50

Umesh AHIR

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recylerView.getItemCount() return only visible on screen items count

2 Answers2