Updates visible item views in RecyclerView

updates-visible-items-recyclerview.java

private void updateVisibleTaskIndex() {
    RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
      if (layoutManager instanceof LinearLayoutManager) {
          LinearLayoutManager linearLayoutManager = (LinearLayoutManager) layoutManager;
          int first = linearLayoutManager.findFirstVisibleItemPosition();
          int last = linearLayoutManager.findLastVisibleItemPosition();
          RecyclerView.ViewHolder viewHolder;
          for (int i = first; i <= last; i++) {
              viewHolder = recyclerView.findViewHolderForAdapterPosition(i);
              if (viewHolder instanceof TaskViewHolder) { //TaskViewHolder is custom holder
                // Update view components in ViewHolder
                  ((TaskViewHolder) viewHolder).updateIndex(i - taskSection.getIndex());
              }
          }
      }
}