How to programmatically add a submenu item to the new material design android support library

Question

I am trying to add new menu items to a submenu in the new Material Design drawer panel.

Answer 1

You can add and remove item from navigation view by changing the visibility. Get the item at index and setVisible to true to show and false to hide it.

MenuItem item = navigationView.getMenu().getItem(3);
item.setVisible(false);