How to get CellViewHolder correctly ?

[bogdanmunteanu]

Hi @evrencoskun

I am trying to change the layout in every CellViewHolder when clicking on the ColumnViewHolder. For some reason , in some cases the CellViewHolder is null and shouldn't be .

If I put a null check , in some cases there are 3 holders null , sometimes more.

Here is my code :

@Override
     public void onColumnHeaderClicked(@NonNull RecyclerView.ViewHolder columnHeaderView, int
             column) {
            //ask user if he wants to remove all dates from this
           ColumnHeaderViewHolder columnHeaderHolder = (ColumnHeaderViewHolder) 
       mTableView.getColumnHeaderLayoutManager().getViewHolder(column);
    //int rows = mTableView.getAdapter().getRowHeaderRecyclerViewAdapter().getItemCount();

    Log.e("Column items size",mTableView.getAdapter().getCellColumnItems(column).size()+"");

    int rows = mTableView.getAdapter().getCellColumnItems(column).size();

        if(columnHeaderHolder.getSelected())
        {
            columnHeaderHolder.selectionImage.setImageDrawable(ContextCompat.getDrawable(columnHeaderHolder.getContext(),R.drawable.ic_trip_unselected));
            columnHeaderHolder.setSelected(false);
            for(Object c : mTableView.getAdapter().getCellColumnItems(column))
            {
               ((Cell) c).setSelected(false);
            }

            for(int rowNbr=0;rowNbr<rows;rowNbr++)
            {
                CellViewHolder cellHolder = (CellViewHolder) mTableView.getCellLayoutManager().getCellViewHolder(column,rowNbr);
                cellHolder.cellText.setTextColor(ContextCompat.getColor(mContext,R.color.dark_gray));  //cellText here is null in random cases .
                cellHolder.image.setColorFilter(ContextCompat.getColor(mContext,R.color.dark_gray));
            }

        }else
        {
            columnHeaderHolder.selectionImage.setImageDrawable(ContextCompat.getDrawable(columnHeaderHolder.getContext(),R.drawable.ic_trip_selected));
            columnHeaderHolder.setSelected(true);
            for(Object c : mTableView.getAdapter().getCellColumnItems(column))
            {
                ((Cell) c).setSelected(true);
            }

            for(int rowNbr=0;rowNbr<rows;rowNbr++)
            {
                CellViewHolder cellHolder = (CellViewHolder) mTableView.getCellLayoutManager().getCellViewHolder(column,rowNbr);
                cellHolder.cellText.setTextColor(ContextCompat.getColor(mContext,R.color.dark_gray));
                cellHolder.image.setColorFilter(ContextCompat.getColor(mContext,R.color.dark_gray));
            }

        }