Calculate the Number of Items Displayed by Recyclerview and Place in a Textview

How to create textview that hold the count of items in recyclerview in android studio

You can get position of first visible item in your recyclerview from findFirstVisibleItemPosition() method of the recyclerviews' Layout Manager

mRecycleView.setOnScrollListener(new RecyclerView.OnScrollListener() {
    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        int positionView = ((LinearLayoutManager)recyclerView.getLayoutManager()).findFirstVisibleItemPosition();
        textView.setText(Integer.toString(positionView)); //The TextView you want to update
     }
});

Not getting total item count from recyclerview

I also tried this but failed so I instead used snapshot.getchilderncount In my firebase database reference and checked if childrencount =0 or not

Create a value event listener For your apointment database reference and in it say if(snapshot.getChildrenCount==0) { ///your logic }

How to sum cardView item values in recyclerView and display the total sum on a textView outside the recyclerView

it works like this for me, I changed notifyDataSetChanged(); into notifyItemChanged(position);

so that I can get the total value (v4) and pass it to text view as shown

  @Override
 public void onClick(View view) {
     int position = getAdapterPosition();
     Element element = this.element.get(position);
     String bd=  element.getCode();
     List<Price> priceList = priceDao.queryBuilder().where(PriceDao.Properties.ElCode.eq(bd)).list();
     String pricev = priceList.get(0).getPriceValue();
     // Calculating the total price of each
     v6 = Float.parseFloat(pricev);
     x3=v6*count;
         v5=0;
     count= Integer.parseInt(element.getCount());
     if(view.getId()==add.getId()) {
         count = count+1;
         c = String.valueOf(count);
         element.setCount(c);
         elementDao.update(element);
         notifyDataSetChanged();
         v5=1;
     } else if (view.getId()==sub.getId()) {
         if(count==0) {
             count = 0;
             c = String.valueOf(count);
             element.setCount(c);
             elementDao.update(element);
             notifyDataSetChanged();
             v5=3;
         }
         else {
             count = count-1;
             c = String.valueOf(count);
             element.setCount(c);
             elementDao.update(element);
             notifyDataSetChanged();
             v5=2;
         }
     }
     count= Integer.parseInt(element.getCount());

 }

}
///////////////////////////////
so that I can get the total value (v4) and pass it to text view as shown

 @Override
public void onBindViewHolder(final MyListsToOrderAdapter.MyHOldd holder, final int position) {
      priceDao=setUpDBPrice();
  String bs=  element.get(position).getCode();
List<Price> priceList = priceDao.queryBuilder().where(PriceDao.Properties.ElCode.eq(bs)).list();
    String pricev = priceList.get(0).getPriceValue();

      // Calculating the total price of each

    v1 = Float.parseFloat(pricev);
    v2= Float.parseFloat(element.get(position).getCount());
    v3=v1*v2;

    final String res = String.valueOf(v3);

    holder.listName.setText(element.get(position).getDescription());
    holder.add.setImageResource(R.drawable.add);
    holder.sub.setImageResource(R.drawable.minus);
    holder.pricess.setText(pricev);
    holder.totalPriceT.setText(res);
    holder.status.setText(element.get(position).getCount());
    holder.addNote.setText("Add");

// Calculating the Total price of all items

        if(v5==1)v5=v6;
         else if(v5==3) v5=-v6;
          else if(v5==2) v5=0;
        else  v5=v3;
          v4=v4+v5;

// displayin on the textView

    String ch = String.valueOf(v4);
    textView.setText("Total: "+ch);

}

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