1-) Android RMOS - RecyclerView birden fazla seçmek için

holder.linearSiparis.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        modelList.get(position).setSecili( !modelList.get(position).isSecili());
        notifyDataSetChanged();
          }
});

if (modelList.get(position).isSecili()) {
    holder.linearSiparis.setBackgroundColor(Color.BLUE);
    holder.txtUrunAd.setTextColor(Color.WHITE);
   } else {
    holder.linearSiparis.setBackgroundColor(Color.WHITE);
    holder.txtUrunAd.setTextColor(Color.BLACK);
  }