「Java学习+面试指南」一份涵盖大部分 Java 程序员所需要掌握的核心知识。准备 Java 面试，首选 JavaGuide！

Google core libraries for Java

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

Dex to Java decompiler

A powerful 🚀 Android chart view / graph view library, supporting line- bar- pie- radar- bubble- and candlestick charts as well as scaling, panning and animations.

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

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

快速、简洁、解决大文件内存溢出的java处理Excel工具

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

Telegram for Android source

Bind Android views and callbacks to fields and methods.

A Java serialization/deserialization library to convert Java Objects into JSON and back

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…

一款面向泛前端产品研发全生命周期的效率平台。

Tinker is a hot-fix solution library for Android, it supports dex, library and resources update without reinstall apk.

An Android library for managing images and the memory they use.

Powerful and flexible library for loading, caching and displaying images on Android.

提高 Android UI 开发效率的 UI 库

💪 A framework for assisting in the renovation of Android componentization (帮助 Android App 进行组件化改造的路由框架)

Luban(鲁班)—Image compression with efficiency very close to WeChat Moments/可能是最接近微信朋友圈的图片压缩算法

🔥 A low-cost Android screen adaptation solution (今日头条屏幕适配方案终极版，一个极低成本的 Android 屏幕适配方案).

Picture Selector Library for Android or 图片选择器

greenDAO is a light & fast ORM solution for Android that maps objects to SQLite databases.

🎆 A well-designed local image and video selector for Android

Tools to work with android .dex and java .class files

VasSonic is a lightweight and high-performance Hybrid framework developed by tencent VAS team, which is intended to speed up the first screen of websites working on Android and iOS platform.

Matrix is a plugin style, non-invasive APM system developed by WeChat.

A declarative API to handle Android runtime permissions.

A barebones WebSocket client and server implementation written in 100% Java.