The simplest way to install and manage your AIR native extensions and libraries is to use the AIR Package Manager (
apm). We highly recommend using
apm, as it will handle downloading all required dependencies and manage your application descriptor (Android manifest additions, iOS info additions etc).
However you can choose to install it manually, as you would have done in the past.
Note: All of the commands below should be run in a terminal / command prompt in the root directory of your application, generally the level above your source directory.
If you don't have an APM project setup, expand the guide below to setup an APM project before installing the extension.
If you haven't installed
apm follow the install guide on airsdk.dev.
Setup an APM project
You will need an APM project for your application.
There are many ways to do this and for more options see the APM documentation. Here we will just initialise a new empty project:
Check your github token
We use github to secure our extensions so you must have created a github personal access token and configured
apm to use it.
To do this create a token using this guide from github and then set it in your apm config using:
apm config set github_token ghp_XXXXXXXXXXXXXXXXXXXXXXXXXXXX
If you don't do this correctly you may find the install will fail.
Install the extension
Install the extension by running:
apm install com.distriqt.OCR
This will download and install the extension, required assets, and all dependencies.
apm will have created something like the following file structure:
| |____ ios
| | |____ Frameworks
| | | |____ TesseractOCR.framework
| |____ com.distriqt.OCR.ane # OCR extension
| |____ [dependencies]
|____ apm_packages # cache directory - ignore
|____ project.apm # apm project file
anedirectory to your IDE. See the tutorials located here on adding an extension to your IDE.
You will have an
assetsdirectory that contains required assets for the installed extensions. You must add the files in the
assets/iosfolder to the root of your iOS application package. (It contains the
Frameworksfolder with the required iOS dynamic frameworks). You do not need to add this to your Android application package.
We suggest you use these locations directly in your builds rather than copying the files elsewhere. The reason for this is if you ever go to update the extensions using
apm that these updates will be pulled into your build automatically.
The following guide is used to manually install the extension, download dependencies and update the application descriptor. We highly recommend installing extensions using
apm will automate the installation and automatically handle updates and dependencies along with greatly simplifying the application descriptor generation.
First step is always to add the extension to your development environment. Download the extension from the repository and then follow the tutorial located here to add the extension to your development environment.
Many of our extensions use some common libraries, for example, the Android Support libraries.
We have to separate these libraries into separate extensions in order to avoid multiple versions of the libraries being included in your application and causing packaging conflicts. This means that you need to include some additional extensions in your application along with the main extension file.
You will add these extensions as you do with any other extension, and you need to ensure it is packaged with your application.
The Core ANE is required by this ANE. You must include and package this extension in your application.
The Core ANE doesn't provide any functionality in itself but provides support libraries and frameworks used by our extensions. It also includes some centralised code for some common actions that can cause issues if they are implemented in each individual extension.
You can access this extension here: https://github.com/distriqt/ANE-Core.
The Android Support libraries encompass the Android Support, Android X and common Google libraries.
These libraries are specific to Android. There are no issues including these on all platforms, they are just required for Android.
This extension requires the following extensions:
You can access these extensions here: https://github.com/distriqt/ANE-AndroidSupport.
Note: if you have been using the older
com.distriqt.androidsupport.*(Android Support) extensions you should remove these extensions and replace it with the
androidxextensions listed above. This is the new version of the android support libraries and moving forward all our extensions will require AndroidX.
This extension does not include any training data.
You will need to make sure you download and include at least one
Updating your application descriptor will insert the required
extensionID's and generate the manifest and info additions for your application.
You update your application descriptor by running:
apm generate app-descriptor src/MyApp-app.xml
Change the path (
src/MyApp-app.xml) to point to your application descriptor.
This will modify your application descriptor replacing the manifest additions and info additions with the ones generated from
You should backup your application descriptor before running this command to ensure you don't lose any information.
The following should be added to your
extensions node in your application descriptor to identify all the required ANEs in your application:
Tesseract is based on a dynamic framework so you must include the framework in your application for signing by AIR.
To do this create a
Frameworks directory at the top / root level of your application and ensure it is packaged with your AIR application.
It should contain all the
dylib files in the supplied
Frameworks directory and the
Frameworks directory should at least contain:
Checking for Support
You can use the
isSupported flag to determine if this extension is supported on the current platform and device.
This allows you to react to whether the functionality is available on the device and provide an alternative solution if not.
// Functionality here