How to get view from RecyclerView at specific adapter position and get values from those views?

Question

I have RecyclerView having an ImageView and a TextView for each row layout.In ViewHolder in RecyclerViewAdapter, I have click listener as

 v.setOnClickListener(new View.OnClickListener() {
                 @Override
                 public void onClick(View v) {
                     Images i=list.get(getAdapterPosition());
                     i.setFlag(!i.getFlag());
                     list.set(getAdapterPosition(),(i));
                     notifyDataSetChanged();
                 }
             });

In that click listener I am changing Boolean flag such that it can show either an item is selected or not.Depending on it's value I want to Traverse entire ArrayList by checking

for(int i=0; i<images.size(); i++){
                if(images.get(i).getFlag()){

                    // there I want to get view from LayoutManager for that item
                    //but how to get view for that item and get Bitmap form imageview for that item
                    //end of geting view 
                }
            }

Please help to get view at specific adapter position from Recyclerview Image to reflect my problem is as follows

and you can get position of click and you will get imge by position if you pass list of image view and post your adapter here — Vinesh Chauhan, Dec 15 '17 at 06:37
Sir ! to add click listener is not My problem since We want to Visit Views outside of RecyclerView Adapter and depending on the Boolean value of flag we want to get Views from RecyclerView layout Manager — Mashhood Qadeer, Dec 15 '17 at 06:44
accept answer by @Prem is it solved your problem so other can find best solution — Vinesh Chauhan, Dec 15 '17 at 06:47

Goku · Accepted Answer · 2017-12-15T07:08:45.323

11

Try this use recyclerView.getLayoutManager().findViewByPosition(int position) to get particular row of recyclerView

View row = recyclerView.getLayoutManager().findViewByPosition(0);
TextView textView = row.findViewById(R.id.YourTextviwID);
textView.setText("Nilu");
ImageView textView = row.findViewById(R.id.YourImageViewID);
imageView.setBackgroundResource(R.mipmap.ic_launcher);

NOTE :- only item that is display in screen when you scroll recyclerView than item will removed from memory

EDIT :- you can write a public method in adapter to get your arraylist in your activity where you can check your flag

edited Dec 15 '17 at 07:08

answered Dec 15 '17 at 06:35

Goku

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Sir !You are great . It is working .But Sir why sometimes it return null view when we use View row = recyclerView.getLayoutManager().findViewByPosition(2); – Mashhood Qadeer Dec 15 '17 at 06:41
@MashhoodQadeerBhatti because of recyclerView the recyclerView hold only item that is display in screen when you scroll recyclerView than item will removed from memory – Goku Dec 15 '17 at 06:43
Sir ! I want your opinion for my work that If I want to get bitmap from All ImageViews in recyclerView where flag was true at the end will it work or not. – Mashhood Qadeer Dec 15 '17 at 06:47
@MashhoodQadeerBhatti you can write a public method in adapter to get your arraylist in your activity where you can check your flag let me know if any more help required – Goku Dec 15 '17 at 06:49
I have used a public method and following code to get text of TextViews that were selected try{ for(int i=0; i – Mashhood Qadeer Dec 15 '17 at 06:55
But for Adapter position when it is not 2 As Sir! Prem has suggested that it only gives that are in view and other are null.Therefore I think can we disable RecyclerView to recycle view – Mashhood Qadeer Dec 15 '17 at 06:57
@MashhoodQadeerBhatti didn't get u – Goku Dec 15 '17 at 07:02
Sir ! I want recyclerView to stop recycling the views and If it stop to recycle the views then it means it will never give null view So can we get it – Mashhood Qadeer Dec 15 '17 at 07:15
you can not **` recyclerView to stop recycling the views`** – Goku Dec 15 '17 at 07:17
Then why that method is given holder.setIsRecyclable(false); – Mashhood Qadeer Dec 15 '17 at 07:18
@MashhoodQadeerBhatti better to use this https://stackoverflow.com/questions/47826949/how-to-get-view-from-recyclerview-at-specific-adapter-position-and-get-values-fr/47827026?noredirect=1#comment82616566_47827026 – Goku Dec 15 '17 at 07:21
1

Sir Thanks Thanks Thanks ....Thanks a lot. You have solved my problem how to get view from RecyclerView at a specific position. – Mashhood Qadeer Dec 15 '17 at 07:25
@MashhoodQadeerBhatti happy to help you – Goku Dec 15 '17 at 07:27
if you dont want to use a RecyclerView , just use a ListView, it will not recycle the views – Gastón Saillén Sep 11 '18 at 20:13

How to get view from RecyclerView at specific adapter position and get values from those views?

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