📚 Freely available programming books

Flutter makes it easy and fast to build beautiful apps for mobile and beyond

A framework for building native applications using React

Get a full fake REST API with zero coding in less than 30 seconds (seriously)

The Kotlin Programming Language.

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

A type-safe HTTP client for Android and the JVM

A libre lightweight streaming front-end for Android.

Render After Effects animations natively on Android and iOS, Web, and React Native

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

Netty project - an event-driven asynchronous network application framework

ZXing ("Zebra Crossing") barcode scanning library for Java, Android

🔥 Android developers should collect the following utils(updating).

Android/iOS video player based on FFmpeg n3.4, with MediaCodec, VideoToolbox support.

A categorized collection of Android Open Source Projects, More powerful web version:

Render After Effects animations natively on Web, Android and iOS, and React Native. http://airbnb.io/lottie/

A memory leak detection library for Android.

Bind Android views and callbacks to fields and methods.

Simple and fast JSON database

This project is deprecated and stale. The latest ExoPlayer code is available in https://github.com/androidx/media

The Google I/O Android App

视频播放器（IJKplayer、ExoPlayer、MediaPlayer），HTTPS，16k page size，支持弹幕，外挂字幕，支持滤镜、水印、gif截图，片头广告、中间广告，多个同时播放，支持基本的拖动，声音、亮度调节，支持边播边缓存，支持视频自带rotation的旋转（90,270之类），重力旋转与手动旋转的同步支持，支持列表播放 ，列表全屏动画，视频加载速度，列表小窗口支持拖…

RxJava bindings for Android

😍 A beautiful, fluid, and extensible dialogs API for Kotlin & Android.

A powerful image downloading and caching library for Android

Implementation of ImageView for Android that supports zooming, by various touch gestures.

Flexbox for Android

An efficient, small mobile key-value storage framework developed by WeChat. Works on Android, iOS, macOS, Windows, POSIX, and OHOS.

A gardening app illustrating Android development best practices with migrating a View-based app to Jetpack Compose.

A fast dependency injector for Android and Java.