android submenu

 

Submenus

A sub menu can be added within any menu, except another sub menu. These are very useful when your application has a lot of functions that may be organized in topics, like the items in a PC application's menu bar (File, Edit, View, etc.).

A sub menu is created by adding it to an existing Menu with addSubMenu(). This returns a SubMenu object (an extension ofMenu). You can then add additional items to this menu, with the normal routine, using the add() methods. For example:

Code:

1. public boolean onCreateOptionsMenu(Menu menu) {  
2.   boolean result = super.onCreateOptionsMenu(menu);  
3.   //设置子菜单的名称
4.   SubMenu fileMenu = menu.addSubMenu("File");  
5.   SubMenu editMenu = menu.addSubMenu("Edit");  
6.   //按对应的名称增加子菜单
7.   fileMenu.add("new");  
8.   fileMenu.add("open");  
9.   fileMenu.add("save");  
11.   editMenu.add("undo");  
12.   editMenu.add("redo");  
13.   
14.   return result;  
15. }