The Android SDKs is hosted on Mavern Central https://search.maven.org/
The Android SDK is available in two integration options
This is a quick integration option which has prebuilt screens for Selfie and ID Document capture, This is recommended if you don't have too much customisation requirement for the Selfie and Document capture screens as this is something built to cut down on time to integration and also using our internal recommended integration methods
This is the android SDK with all the building blocks on which Smile ID UI builds on and has all the components required to integrate on android. This is recommended if you have specific integration requirements particularly on the UI side where you would need a lot of flexibility compared to what Smile ID UI would allow.