The SDK is delivered as an .aar library. While not widely adopted, or clearly documented, the aar format does work. There are two ways to integrate the SDK into an Android Studio project.
Using the local maven repo was the approach used during development. This requires Maven, and was developed on OS X 10.92 using Maven 3.2.1 installed using Brew. An example Gradle task to upload the aar would be similar to the following:
Once this has completed successfully, adding the Nike SDK to your project requires adding a dependency to your Gradle build file, and referencing the local Maven repository.
An alternative method of integrating the SDK in the project is by using a directory based approach. The directory is listed as a flatDir, while the .aar listed in the compilation block as in the local repository approach.