This section describes the Flex packages.


 说明
 air.netThe air.net package contains classes for network detection. This package is only available to content running in the Adobe Integrated Runtime. It is included in the ServiceMonitor.swc file (for SWF-based application developers) and ServiceMonitor.swf files (for HTML-based AIR application developers). 
 flash.uiThe flash.ui package contains user interface classes, such as classes for interacting with the mouse and keyboard. 
 flash.netThe flash.net package contains classes for sending and receiving from the network, such as URL downloading and Flash Remoting. 
 flash.geomThe flash.geom package contains geometry classes, such as points, rectangles and transformation matrixes, to support the BitmapData class and the bitmap caching feature. 
 flash.htmlThe flash.html package contains classes used for including HTML content in an AIR application. This package is only available to content running in the Adobe Integrated Runtime. 
 flash.dataThe flash.data package contains classes used for working with Adobe AIR local SQL databases. 
 flash.utilsThe flash.utils package contains utility classes, such as data structures like ByteArray. 
 flash.mediaThe flash.media package contains classes for working with multimedia assets such as sound and video. 
 flash.desktopThe flash.desktop package contains classes used for copy-and-paste and drag-and-drop operations, as well as the Icon class, used to define system icons used by a file. This package is only available to content running in the Adobe Integrated Runtime. 
 flash.displayThe flash.display package contains the core classes that the Flash Player uses to build visual displays. 
 flash.eventsThe flash.events package supports the new DOM event model and includes the EventDispatcher base class. 
 flash.errorsThe flash.errors package contains a set of commonly used error classes. 
 flash.filesystemThe flash.filesystem package contains classes used in accessing the filesystem. This package is only available to content running in the Adobe Integrated Runtime. 
 flash.systemThe flash.system package contains classes for accessing system-level functionality, such as security, multilanguage content, etc. 
 flash.securityThe flash.security package includes classes for validating XML signatures. This package is only available to content running in the AIR runtime.