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A best practice is to provide a handshake between the native
extension and the AIR for TV application. The handshake tells the
application about the availability of the extension on the device.
This information allows the AIR for TV application to decide what
logic paths to take.
Decide what public interfaces to provide in your ActionScript
extension class for this handshake. Then, instruct AIR for TV application
developers on the use of these interfaces.
For example, consider a native extension that has:
-
A stub extension for packaging with the AIR for TV
application.
-
A simulator extension for testing the application on a desktop
computer.
-
The device-bundled, real extension for installing on the
target device.
In the ActionScript side of each variation, define a method called
isSupported()
with
the following implementations:
-
In the real ActionScript implementation that interacts
with the native implementation, implement the method to return
true
.
The
calling AIR application is running on a device on which the extension
is device-bundled. Therefore, the application knows it can continue
using the extension.
-
In the stub ActionScript implementation, implement the method
to return
false
.
The calling AIR application
is running on a device on which the extension is not device-bundled.
In this situation, AIR for TV uses the stub extension that was packaged
with the AIR application. The
false
return value
informs the application not to call any other methods of the extension.
The application can make the appropriate logic decisions, such as
to exit gracefully.
-
In a simulator ActionScript implementation, implement the
method to return
true
.
The calling AIR application
is running on a desktop computer for testing purposes. Therefore,
the
true
return value informs the application that
it can continue using the extension.
However, depending on
your extension, you can instruct application developers to package
their applications with your simulator extension. Then, if the application
is running on a device that does not have the device-bundled extension,
the application proceeds with the simulator version of the extension.
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