Creating Submenus

Submenus are displayed as regular Menu Items that, when selected, reveal more items. Traditionally, submenus are displayed in a hierarchical tree layout. Android uses a different approach to simplify menu navigation for small-screen devices. Rather than a tree structure, selecting a submenu presents a single floating window that displays all of its Menu Items.

You can add submenus using the addSubMenu method. It supports the same parameters as the add method used to add normal Menu Items, enabling you to specify a group, unique identifier, and text string for each submenu. You can also use the setHeadericon and seticon methods to specify an icon to display in the submenu's header bar or icon menu, respectively.

The Menu Items within a submenu support the same options as those assigned to the icon or extended menus. However, unlike traditional systems, Android does not support nested submenus.

The following code snippet shows an extract from an implementation of the onCreateMenuOptions code that adds a submenu to the main menu, sets the header icon, and then adds a submenu Menu Item:

SubMenu sub = menu.addSubMenu(0, 0, Menu.NONE, "Submenu");



Menuitem submenuitem = sub.add(0, 0, Menu.NONE, "Submenu item");

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