在ListView中检查所有复选框的正确方法?

I have a ListView with set CHOICE_MODE_MULTIPLE. I also have additional header to manage (un)selecting all the items. The question is : is it correct way to do that? Well it works, however I'm not sure thats proper way. As you see below there is an checkAllCheckBoxes object which I pass to header onClickListener() method. What do you think? Would be grateful for any responses.I have a ListView with set CHOICE_MODE_MULTIPLE