Provides a variety of Android feature and utility APIs that are compatible with a wide range of platform versions.
Includes APIs to help you write declarative layouts and minimize the glue code necessary to bind your application logic and layouts.
ZXing ("zebra crossing") is an open-source, multi-format 1D/2D barcode image processing library implemented in Java, with ports to other languages.
Packer is a tool for creating identical machine images for multiple platforms from a single source configuration.
Fastjson is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to an equivalent Java object. Fastjson can work with arbitrary Java objects including pre-existing objects that you do not have source-code of.
RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.
An image loading and caching library for Android focused on smooth scrolling https://bumptech.github.io/glide/.
A small Android library allowing you to have a smooth and customizable horizontal indeterminate ProgressBar.