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.

provides the base Activity subclass and the relevant hooks to build a composable structure on top.

library that contains the annotations for Android Jetpack.

helper for other arch dependencies, including JUnit test rules that can be used with LiveData.

support newer Android features on older Android versions.

AndroidX library to implement the Material Design card pattern with round corners and drop shadows.

standalone efficient collections.

AndroidX library to help move tasks off the main thread with coroutines and take advantage of ListenableFuture.

library to reduce the number of nested views needed.

AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.

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.

a module to implement custom views. Part of the Android Support Library.

a library to view a file document.

AndroidX library to implement a Material Design drawer widget.

core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.

a library to read and write image file EXIF tags.

AndroidX library to encapsulate part of the user interface or behavior into reusable components.

leverages graphics facilities across multiple Android platform releases.

AndroidX library to use animation interpolators on older platforms.

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

library to load data for your UI that survives configuration changes.

an application-wide event bus and embraces layer violations in your app: any component may listen events from any other.

share media contents and controls with other apps.

a library to build interactive settings screens without needing to interact with device storage or manage the UI.

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

a persistence library that provides an abstraction layer over SQLite to allow for more robust database access while harnessing the full power of SQLite.

display large sets of data in your UI while minimizing memory usage.

provides the base Activity subclass and the relevant hooks to build a composable structure on top.

library that contains abstract interfaces along with basic implementations which can be used to build your own libraries that access SQLite.

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

implemtation of the swipe-to-refresh UI pattern.

AndroidX library to write trace events to the system trace buffer.

animates motion in the UI with starting and ending layouts.

AndroidX library to render vector graphics.

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

AndroidX library to display Views or Fragments in a swipeable format.

replaces AndroidX ViewPager, addressing most of its predecessor’s pain-points, including right-to-left layout support, vertical orientation, modifiable Fragment collections, etc.

an API that makes it easy to schedule deferrable, asynchronous tasks that must be run reliably .

Coroutine Image Loader. An image loading library for Android backed by Kotlin Coroutines.

D8 is a replacement for the DX dexer and R8 is a replacement for the Proguard shrinking and minification tool.

a utility library for Android to save objects in a Bundle without any boilerplate. It uses an annotation processor to wire up all dependencies.

an extensible media player library for Android

library to help with material design guidelines.

a collection of source code generators for Java.

a set of core libraries that includes new collection types (such as multimap and multiset), immutable collections, a graph library, functional types, an in-memory cache, and APIs/utilities for concurrency, I/O, hashing, primitives, reflection, string processing, and much more.

library that deals with Protocol Buffers (a.k.a., protobuf) – Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data.

a tiny, fast, and compliant JSON parser and writer for Java.

facilitates restarting your application process (like a Phoenix from the ashes).

RxJava binding APIs for Android's UI widgets.

a library for avoiding TransactionTooLargeException during state saving and restoration.

a file/directory-picker for android.

OkHttp is an HTTP+HTTP/2 client for Android and Java applications.

a simple, flexible library for complex RecyclerView layouts.

Markdown library.

RxJava (Reactive Extensions for the JVM) is a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

a collection of Java programming language APIs that offer features for intensive I/O operations.

The Kotlin Programming Language

library support for Kotlin coroutines.

A modern I/O API for Java to make it much easier to access, store, and process your data.

Application Crash Reports for Android. By default, sends Crash reports silently without informint the user, but can be configured to ask first.

Chromium WebView helpers

Java implementation of CommonMark, a specification of the Markdown format.

a Java library for working with real-world HTML. It provides an API for extracting and manipulating data, using the best of DOM, CSS, and jquery-like methods.

open-source implementation of JavaScript written entirely in Java.

social style date and time formatting for Java.

provide a standard for asynchronous stream processing with non-blocking back pressure.

a library for extracting things from streaming sites.

a multi-thread & lightweight downloader.

a multi-thread & lightweight downloader.

a multi-thread & lightweight downloader.