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The ApplicationUpdater object dispatches the checkForUpdate event
before the update process begins, just before the updater tries
to download the update descriptor file. If you cancel the default
behavior of the checkForUpdate event, the updater
does not download the update descriptor file. You can call the checkForUpdate() method
resume the update process:
appUpdater.checkForUpdate();
Calling the checkForUpdate() method causes the
updater to asynchronously download and interpret the update descriptor
file. As a result of calling the checkForUpdate() method,
the updater object can dispatch the following events:
StatusUpdateEvent.UPDATE_STATUS—The
updater has downloaded and interpreted the update descriptor file
successfully. This event has these properties:
available—A
Boolean value. Set to true if there is a different
version available than the current application; false otherwise
(the version is the same).
version—A String. The version from the application
descriptor file of the update file
details—An Array. If there are no localized
versions of the description, this array returns an empty string
("") as the first element and the description as
the second element.
If there are multiple versions of the
description (in the update descriptor file), the array contains
multiple sub-arrays. Each array has two elements: the first is a
language code (such as "en"), and the second is
the corresponding description (a String) for that language. See Defining the update descriptor files and adding the AIR file to your web server.
StatusUpdateErrorEvent.UPDATE_ERROR—There
was an error, and the updater could not download or interpret the
update descriptor file.
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