Menu-Based Interfaces for Browsing
These interfaces present the user with lists of options, called menus, that lead the user through the formulation of a request. Menus do away with the need to memorize the specific commands and syntax of a query language; rather, the query is composed step by step by picking options from a menu that is displayed by the system. Pull-down menus are becoming a very popular technique in window-based user interfaces. They are often used in browsing interfaces, which allow a user to look through the contents of a database in an exploratory and unstructured manner.
Calling Built-In Applications Using Intents Until this point, you have seen how to call activities within your own application. One of th...