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The code and configuration files were made with Android 10 (API level 29) in mind but they can be easily modifiable to work with other versions.

Here, we are assuming you already have access to the Android source code and that you can build and deploy these changes. We will also learn how to connect an application to our example service using the add-on. In this post, we will build an SDK Add-on containing an example service - for which we will cover all the necessary config files. Having to build only the add-on is also a great advantage that might save a lot of development time. Therefore, by using add-ons, OEMs can add libraries in their namespaces, providing functionalities that can be exported without infringing the CDD. According to the Android Compatibility Definition Document (CDD), OEMs are not allowed to change the Android public APIs - namely those in the protected namespaces: java.*, javax.*, sun.*, android.*, com.android.*. SDK Add-ons allow third-party actors to extend the Android SDK to add interfaces to their features without changing the Android SDK.

The Android Software Development Kit (SDK) is a collection of libraries and tools that enables and makes it easier to develop Android applications. That’s when the SDK Add-on comes in handy.

Whether you are an OEM company or a developer customising the Android Open Source Project, you might have come across the issue where you developed a feature and you would like for App developers to use it. How to build and use an Android SDK Add-on