How to modify the item count of recycleviewer when the end of the last is reached?

Question

I am looking to modify the number of items that is displayed in my recyclerviewer on the event that the last item of the current itemcount is viewed..

   var mainadapt = MainAdapter()
        Timeline.adapter = mainadapt
        
        fun OnLastItemReached(){
            Timeline.adapter.itemCount += 10
        }

The code above is incorrect since the method ".itemcount" isn't a class variable so it can't just be modified at will. But it is the logic that I am trying to showcase, Basically loading 10 more items every time the last items is viewed.

i can help you with java not kotlin(if you want) you can convert it into java then — Jyotish Biswas, Aug 06 '20 at 02:57
please , i would very much appreciate it. can I messenger you? — RonRon Scores, Aug 06 '20 at 02:58
before that tell me what you exactly want in breaf. are trying to do manual pagination with Adapter? — Jyotish Biswas, Aug 06 '20 at 03:33
yes , im trying to just load more items into recycleviewer when the last item is reached.. like if create a class variable inside of my adapter class : var itemcountvar = 20 — RonRon Scores, Aug 06 '20 at 03:47
when the position of the onbindviewholder = 20 i will load 10 more — RonRon Scores, Aug 06 '20 at 03:47
Add a scroll listener to the layout manager, inside the layout manager has a method for knowing the las visible item, also you can get the position of it, so it is basically: is last visible item position is greater than the adapter item count minus yout threshold then add more items — cutiko, Aug 06 '20 at 04:14
Does this answer your question? [kotlin RecyclerView Pagination](https://stackoverflow.com/questions/51433106/kotlin-recyclerview-pagination) — kelvin, Aug 06 '20 at 04:38

score 0 · Accepted Answer · edited Aug 06 '20 at 04:09

0

This Answer i am giving you in Java as you r requested in comment

use getItemCount like this and call loadPage page method from responsible Activity or Fragment with page number

int initialSize =20;
int loadSize=10;
int pageNumber =1;
@Override
public int getItemCount() {
    if (infos.size()<initialSize){
        return infos.size();
    }
    else if (infos.size()>initialSize+(pageNumber*loadSize)){
        return initialSize+(pageNumber*loadSize);
    }else {
        return infos.size();
    }
   
}

public void loadPage(int page){
    pageNumber =page;
    notifyDataSetChanged();
}

edited Aug 06 '20 at 04:09

Dharman

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answered Aug 06 '20 at 04:03

Jyotish Biswas

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im really just trying to have a class variable, and then have that class variable the return value for the getitemcount() , I can't find a way to modify the class variable , unless its from where the object was initilized , which is the class linked to the activity. – RonRon Scores Aug 06 '20 at 04:29
you can call `loadPage` from `onBindViewHolder` when the last position binds – Jyotish Biswas Aug 06 '20 at 04:37
https://stackoverflow.com/a/40728909/12676247 you can get that from here – Jyotish Biswas Aug 06 '20 at 04:57
recreate means starting the activity from beginning so everything under that activity will start from biginng – Jyotish Biswas Aug 06 '20 at 06:07

How to modify the item count of recycleviewer when the end of the last is reached?

1 Answers1