How to get child view from RecyclerView?

Question

I am trying to get child view by position. I could get view when one item is clicked:

rvSellRecords.addOnItemTouchListener(new RecyclerItemClickListener(getActivity(), new RecyclerItemClickListener.OnItemClickListener() {
        @Override
        public void onItemClick(View view, int position) {
            ((MainActivity) getActivity()).showSellRecordFragment(position, view);
        }
    }));

Now I cannot get child view, without click - let's say by position for example:

rvSellRecords.someMagicalMethodWhichReturnsViewByPosition(5);

Question: How to get child view from RecyclerView?

EDIT FOR BOUNTY:

I have RecyclerView to show products list. When I click on it, I am adding new Fragment where I show product information. While opening I am updating toolbar with view from RecyclerView - this is working perfectly:

    rvSellRecords.addOnItemTouchListener(new RecyclerItemClickListener(getContext(), new RecyclerItemClickListener.OnItemClickListener() {
                    @Override
                    public void onItemClick(View view, int position) {
                        sellPresenter.onSellRecordSelected(position, view);
                    }
                }));

    When I click blue button with "+", I am incrementing quantity by 1.





    public void onIncrementButtonClicked(){
                sellRecord.setCount(sellRecord.getCount() + 1);
                showQuantity();
                bus.post(new SellRecordChangedEvent(sellRecord, sellRecordPosition));
                }

Then I am posting updated sellRecord to first fragment using EventBus. There I am updating list data. I supposed that updating value(sell) automatically updates adapter. Now I am getting view from adapter using custom method(getView) which was created by me(you can find it below).



 @Subscribe
public void onEvent(SellRecordChangedEvent event){
    sell.getSellRecords().set(event.getSellRecordPosition(), event.getSellRecord());
    sell.recalculate();
    int position = event.getSellRecordPosition();
    View view = adapter.getView(position);
    bus.post(new TransactionTitleChangedEvent(null, view));
}

This is my adapter class - I changed adapter little bit to collect view in list and added method which returns view for respective position:



public class SellRecordsAdapter extends RecyclerView.Adapter<SellRecordsAdapter.ViewHolder> {

    .....
    .....
    .....
    List<View> viewList;

    public SellRecordsAdapter(List<SellRecord> sellRecordList) {

        .....

        viewList = new ArrayList<>();
    }

    .....
    .....
    .....

    @Override
    public void onBindViewHolder(ViewHolder viewHolder, int i) {

        .....
        .....
        .....

        viewList.add(i, viewHolder.itemView);

    }


    public View getView(int position){
        return viewList.get(position);
    }

}

My problem: when I updating view in toolbar, I am getting old view. When quantity is 3, I am getting view with 2. When quantity 10 - view is with 9.

My question: how to get view from recycler view using position of item(without on click listener)?

Answer 1

Use recyclerView.findViewHolderForLayoutPosition(position) or reyclerView.findViewHolderForAdapterPosition(position) to get the viewholder for postion. Then you can access any child from your viewholder.

Checkout Recyclerview

Answer 2

RecyclerView.ViewHolder holder = recycleView.findViewHolderForAdapterPosition(position);
ImageView imageView = holder.itemView.findViewById(R.id.iv_product);

This is a supplement to @Ravi Teja's answer. You can get the viewHolder from the recyclerView using position of the particular item, then get a particular view from the viewHolder as shown above

Answer 3

You can use RecyclerView's LayoutManager for it.

View view = layoutManager.findViewByPosition(position)

Answer 4

Hope this helps someone: I was getting null pointer exceptions with:

• recyclerView.findViewHolderForAdapterPosition
• recyclerView.findViewHolderForItemId
• layoutManager.findViewByPosition.

The reason was that there is a slight delay for the viewholder to be created. I found the solution here: https://stackoverflow.com/a/33414430/7952427

Answer 5

I post an answer because which is really complex to findviews() from RecyclerView.

@Joe: After spending 4hours found one answer. Which gives me the proper view of the index.

mAdapter is adapter of RecyclerView        
View v = recyclerView.findViewHolderForItemId(mAdapter.getItemId(index/position)).itemView; 

Now just access your views by: v.findViewById(R.id.edittext) OR any id.

Answer 6

it helped me, make a 100 ms delay before manipulate it, like this:

Handler handler = new Handler();        
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
// rcv is my recyclerview
rcvStatus.getChildAt(1).setBackground(getActivity().getResources().getDrawable(R.drawable.disabled));
// or:
rcvStatus.getChildAt(1).setClickable(false);
}
}, 100);