ZXing („zebra crossing“) is an open-source, multi-format 1D/2D barcode image processing library.

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.

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

support newer Android features on older Android versions.

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 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.

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

share media contents and controls with other apps.

an interactive indicator to navigate between the different pages of a ViewPager.

An image loading and caching library for Android focused on smooth scrolling

SVG (Scalable Vector Graphics) library for Android.

an extensible media player library for Android

a library project which brings the similar capabilities of CSS Flexible Box Layout Module to Android.

Google Mobile Services in terms of the Android library refers to Google Play Services, a proprietary background service and API package for Android devices which is not part of the Android Open Source Project (AOSP). The library does not contain those services (i.e. it usually requires the Google Framework, often referred to as „GApps“, being installed on the device), but allows an app to communicate with them. Be aware this usually goes along with transferring at least parts of your personal data to the Google network.

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.

 

a highly customizable color picker which supports alpha and allows you to set your own presets.

A SwipeRefreshLayout extension that allows to swipe in both directions.

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

Drag and drop to reorder items in a list, grid or board for Android. Also supports swiping items in a list.

A fast dependency injector for Android and Java.

custom fonts in Android the easy way...

installs a custom LayoutInflater via a ContextThemeWrapper and provides an API of pre/post-inflation interceptors.

Exif extended library for Android, based on jhead c library (deals with Metadata in your photos, such as location, timestamp, aperture…)

specifies a means for obtaining objects in such a way as to maximize reusability, testability and maintainability compared to traditional approaches such as constructors, factories, and service locators (e.g., JNDI). This process, known as dependency injection, is beneficial to most nontrivial applications.

The Kotlin Programming Language

library support for Kotlin coroutines.

library to hook and fix Toast BadTokenException

a simple QRCode generation api for java built on top ZXING

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

an Apache project focused on all aspects of reusable Java components.

a Java Security Provider (JSP) that implements parts of the Java Cryptography Extension (JCE) and Java Secure Socket Extension (JSSE). It uses BoringSSL to provide cryptographic primitives and Transport Layer Security (TLS) for Java applications on Android and OpenJDK.

the Human JSON. A configuration file format for humans. Relaxed syntax, fewer mistakes, more comments.

development helper: integration for the IntelliJ IDEA IDE.

library with common helpers (dialogs, logging etc), layouts, SQLite helpers, and more.

display webpages in the user's default browser.

display webpages in the user's default browser.