应用程序在使用中，“操作栏”将始终显示，不过它的内容、主题和其他属性将由应用程序而不是系统来管理。
The Action Bar is always present when an application is in use, although its content, theme, and other properties are managed by the application rather than the system.
应用程序在使用中，“操作栏”将始终显示，不过它的内容、主题和其他属性将由应用程序而不是系统来管理。
The Action Bar is always present when an application is in use, although its content, theme, and other properties are managed by the application rather than the system.
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