How Can I Select All The Check boxes By Click on a button from action bar

Here is my RecyclerView Adapter On Each Item i show a check boxes and a save button before save any item user select a check box and save the item i want user click on a button and all the check boxes are selected and when user click on cancel button all check boxes are unchecked how can i do this

I tried on single check box it work good but for multiple its not work