Android developer portal with tools, libraries, and apps

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Correct, reproducible, and fast builds for everyone.

Jul 30, 2016

ExpandableLayout can expand / collapse child views.

May 24, 2017

The idea of this library is to build your adapters by composing reusable components.

Oct 27, 2015

An utility library for Android to run jobs delayed in the background. Depending on the Android version either the JobScheduler, GcmNetworkManager or AlarmManager is getting used.

Oct 26, 2015

Fearless RecyclerView Adapter for only focus on your view

May 24, 2017

Orma is a lightning-fast ORM (Object-Relation Mapper) for Android SQLiteDatabase, generating helper classes at compile time with annotation processing.

Dec 6, 2015

F32 is a wrapper for OpenWeatherMap API. It provides developer with super-simple way to obtain weather information by geographic coordinates.

Apr 17, 2017

Syncthing replaces proprietary sync and cloud services with something open, trustworthy and decentralized. Your data is your data alone and you deserve to choose where it is stored, if it is shared with some third party and how it's transmitted over the Internet.

Nov 23, 2015

Easy way to bind collections to listviews and recyclerviews with the new Android Data Binding framework.

Jul 12, 2015

GraphHopper is a fast and memory efficient Java road routing engine. By default it uses OpenStreetMap data, but can import other data sources.

Aug 12, 2015

Stream API from Java 8 rewrited on iterators for Java 7 and below.


  • Functional interfaces;
  • Stream (without parallel processing);
  • Optional class;
  • Objects from Java 7.
Jul 23, 2015

Infer is a static analysis tool for Java, Objective-C and C, written in OCaml.

Jun 12, 2015

Material file picker library for Android

Oct 27, 2015

Simplify your code to its minimum expression with this set of Kotlin extensions for Realm. Forget about all boilerplate related with Realm API and performs database operations in one line of code.

Jan 23, 2017

Open Source framework for building cross-platform truly native iOS, Android and Windows mobile apps using JavaScript.

Jun 17, 2015

Merlin aims to simplify network monitoring. Providing 3 registrable callbacks for network connectivity changes: onConnect, onDisconnect and onBind.

May 17, 2015

Inject automatically your Activities & Fragments, just with a simple annotation.

May 23, 2017

AnyMaps allows you to use the same API for different maps providers without the need to adjust existing Google Maps implementation (apart from changing the package name).

Apr 25, 2017

Modification of ZXING Barcode Scanner project for easy Android QR-Code detection in portrait mode and AR purposes.

This project implements an Android view which show camera and notify when there's a QR code inside the preview.

May 27, 2015

Tree view implementation for Android.

Feb 14, 2015

An Android Mandrill API Connector.

Oct 5, 2015

FlatBuffers is a serialization library for games and other memory constrained apps.

Jun 29, 2015

Epoxy is an Android library for building complex screens in a RecyclerView. It abstracts the boilerplate of view holders, item types, item ids, span counts, and more, in order to simplify building screens with multiple view types. Additionally, Epoxy adds support for saving view state and automatic diffing of item changes.

Aug 26, 2016

A Model-View-Presenter framework for modern Android apps.

Apr 4, 2015

Android library build on top of retrofit, for simple handling of authenticated requests.

Jul 26, 2015

mastodon4j is mastodon client for Java and Kotlin.

Apr 23, 2017

Material Design implementation for Android 2.2 and newer. This is not the exact copy of the Lollipop's API and features. It's a custom implementation of the most useful things as shown in the design specification. The library also features some additional non-standard extensions, like rounded corners for layouts or a Divider view for easy divider creation.

Feb 7, 2015

Kotlin Adaptor for RxJava.

Kotlin has support for SAM (Single Abstract Method) Interfaces as Functions (i.e. Java 8 Lambdas). So you could use Kotlin in RxJava without this adaptor

Feb 2, 2015

Smack is an open source, cross-platform, easy to use, Java XMPP client library.

A pure Java library, it can be embedded into your applications to create anything from a full XMPP client to simple XMPP integrations such as sending notification messages and presence-enabling devices. Smack and XMPP allows you to easily exchange data, in various ways e.g. fire-and-forget, publish-subscribe, between human and non-human endpoints.

May 20, 2015

This library allows to use Material steppers inside Android applications.

Jan 23, 2017