Android developer portal with tools, libraries, and apps

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Statically typed programming language targeting the JVM and JavaScript.

100% interoperable with Java™

Jan 27, 2015

A music progress bar view that loads music file data then shows it in visualizer bar like a sound-cloud.

Dec 13, 2018

High quality, visual, open source tool to create, design, and edit database files compatible with SQLite.

Jul 5, 2014

This library is built in purpose of perfect animation of marker following the polyline in googlemap.

Dec 13, 2018

A custom recycler view with shimmer views to indicate that views are loading for AndroidX. This will only work if you are using AndroidX RecyclerView as a dependency.

Nov 11, 2018

Assent is designed to make Marshmallow's runtime permissions easier to use. Have the flexibility of request permissions and receiving results through callback interfaces.

Jan 29, 2016

MonoGame is an open source implementation of the Microsoft XNA 4.x Framework.

The goal is to make it easy for XNA developers to create cross-platform games with extremely high code reuse.

Aug 3, 2014

A Write Less Do More Library for Android.

AQuery is a lightweight library that allows UI manipulation in a syntactically similar way to the Javascript library JQuery. AQuery aims to remove the boilerplate code that comes with UI manipulation in Android. This helps with readability, ease of development and maintainability.

Jan 2, 2018

Python for android is a project to create your own Python distribution including the modules you want, and create an apk including python, libs, and your application.

Jul 18, 2014

Printooth aims is to provide a simple abstraction for use the bluetooth printers regardless of its brand.

Nov 16, 2018

PRDownloader - a file downloader library for Android with pause and resume support.

Nov 18, 2017

Nice and simple DSL for Espresso in Kotlin.

Oct 12, 2017

A plugin for Kotlin generate Kotlin data class code from a json string.

Oct 14, 2017

A simple and easy to use stopwatch library for android. With TimeIt, you can create a stopwatch app with very few lines of code!


  • Easy to use stopwatch library
  • No need to use seperate threads. Multithreading is handled by the library itself
  • Supports pause/resume and split methods.
  • Supports an OnTickListener to listen for updates in clock.
  • Set the TextView directly with TimeIt (Automatically formats the time).
  • Set custom clock delay to update the time more or less frequently!
  • Much more to come!
Dec 12, 2018

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

Jun 29, 2015

A simple library for Chips/Tags with a searchable ListView.

Jan 15, 2018

Simple WheelView for Android.

Jan 27, 2015

An Android Studio plugin to help remove use of ButterKnife.

Jun 21, 2016

This tool can retrieve dex, jar, smali, xml files, res, etc.

Sep 21, 2015

Easy Android RSS (and also Atom) parser Library


  • Earl parses both Atom and RSS 1.0/2.0
  • Supports RSS extensions (Itunes and Media RSS for now)
  • It's lightweight. There is nothing there but parser. The only dependency it has is android annotations
  • Parser produces easy-to-use immutable POJOs
  • Runs on android versions starting from Android 2.2 (API 8)
Sep 15, 2015

Lottie is a mobile library for Android and iOS that parses Adobe After Effects animations exported as json with Bodymovin and renders them natively on mobile!

For the first time, designers can create and ship beautiful animations without an engineer painstakingly recreating it by hand.

Aug 29, 2017

CameraView aims to help Android developers easily integrate Camera features.

Sep 11, 2016

Catch common Java mistakes as compile-time errors.

Jan 28, 2015

TestObserver to easily test LiveData and make assertions on them, inspired by RxJava. Allows effective testing of your ViewModel and makes TDD possible.

Oct 22, 2018

Android Signature Pad is an Android library for drawing smooth signatures. It uses variable width Bézier curve interpolation.


  • Bézier implementation for a smoother line
  • Variable point size based on velocity
  • Customizable pen color and size
Sep 23, 2014

Protobuf Plugin for Gradle.

Jun 5, 2016
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BottomSheet dialogs library for Android with material design concept. Bottom sheets slide up from the bottom of the screen to reveal more content.

Jan 2, 2018

Project Lombok makes Java a spicier language by adding 'handlers' that know how to build and compile simple, boilerplate-free, not-quite-java code.

Sep 18, 2014

A simple calendar where you can add or remove event. Customize event base color.

Dec 12, 2018