Access the native extension’s directory

Sometimes extensions include additional files, such as images. An extension sometimes also wants to access the information in the extension descriptor file, such as the extension version number.

To access these files for extensions on all devices except iOS devices, use the ExtensionContext class static method getExtensionDirectory() . For example:

var extDir:File = ExtensionContext.getExtensionDirectory("com.example.TVControllerExtension");

Pass the name of the extension to getExtensionDirectory() . This String value is the same name you use in:

  • the extension descriptor file in the id element.

  • the extension ID parameter you pass to ExtensionContext.createExtensionContext() .

The returned File instance refers to the base extension directory. The extension directory has the following structure:

extension base directory/ 
    platform independent files 
            platform name/ 
                platform dependent files and directories

Regardless where the extension directory is on the device, the extension’s files are always in the same location relative to the base extension directory. Therefore, use the returned File instance and File class methods to navigate to and manipulate specific files included with the extension.

The extension directory location depends on whether the extension is available through application-bundling or device-bundling as follows:
  • With application-bundling, the extension directory is located within the application directory.

  • With device-bundling, the extension directory location depends on the device.

An exception to using getExtensionDirectory() exists for ActionScript extensions for iOS devices. The resources for these extensions are not located in the extension directory. Instead, they are located in the top-level application directory. For more information, see Resources on iOS devices .

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