How to add an item to a menu group in NavigationView

Question

In a word game for Android I currently have a hardcoded menu inflated from left_drawer_menu.xml and consisting of 3 groups (my turn, opponent turn and finally other

Answer 1

menu.add(R.id.my_move, i, i, "Item " + i);

You are also assigning the order (3rd param) as i. I am guessing that this is overriding the groupId. Try setting it as NONE as mentioned here

menu.add(R.id.my_move, i, NONE, "Item " + i);

Edit: Maybe something like this

MenuItem lastItem = menu.findItem(R.id.);
int lastOrder= lastItem.getOrder();
menu.add(R.id.my_move, i, lastOrder-5, "Item " + i);

Order is a combination of category and order, so it might not be as straight forward as this.