The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see Understanding the Android Support Library.

a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.

perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.

AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.

AndroidX library to implement a straightforward, performant way to initialize components at app startup.

Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.

Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.

Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.