How to select all items which listed in recyclerview?

Question

I have list of items inside of recyclerview, and they are multiple selectable.

I want to have select button to select all, and if selected deselect all. I didn\'t se

Answer 1

Try to maintain Selected item list and list of items in Adapter,

When you select "Select All" button, just add all item in selected item list and call notifyDataSetChanged

Just a sudo code

class adapter {
    ArrayList selected = new ArrayList();
    ArrayList items = new ArrayList();

    public void selecteAll() {
        selected.clear();
        selected.addAll(items);
        notifyDataSetChanged();
    }

    public void clearAll() {
        selected.clear();
        notifyDataSetChanged();
    }

    public void bindView() {
        Item item = items.get(position);

        if(selected.contains(item) {
            // Do selected action
        } else {
           // Non selecetd ctions
        }
    }

}