Unlike desktop versions in which mouses can be used, it's not so easy to use menus in Android, since we could only close the menu by tapping the header or pressing physical back key. A button can be used to navigate to the upper level (if exists) of a menu.
Unlike desktop versions in which mouses can be used, it's not so easy to use menus in Android, since we could only close the menu by tapping the header or pressing physical back key. A button can be used to navigate to the upper level (if exists) of a menu.