Stars
RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.
A powerful 🚀 Android chart view / graph view library, supporting line- bar- pie- radar- bubble- and candlestick charts as well as scaling, panning and animations.
An image loading and caching library for Android focused on smooth scrolling
ZXing ("Zebra Crossing") barcode scanning library for Java, Android
🔥 Android developers should collect the following utils(updating).
FASTJSON 2.0.x has been released, faster and more secure, recommend you upgrade.
🔥下拉刷新、上拉加载、二级刷新、淘宝二楼、RefreshLayout、OverScroll，Android智能下拉刷新框架，支持越界回弹、越界拖动，具有极强的扩展性，集成了几十种炫酷的Header和 Footer。
Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.
Desktop/Android/HTML5/iOS Java game development framework
A Java serialization/deserialization library to convert Java Objects into JSON and back
This project is deprecated and stale. The latest ExoPlayer code is available in https://github.com/androidx/media
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…
Implementation of ImageView for Android that supports zooming, by various touch gestures.
Picture Selector Library for Android or 图片选择器
This is a picker view for android , support linkage effect, timepicker and optionspicker.（时间选择器、省市区三级联动）
🔥🔥🔥Banner 2.0 来了！Android广告图片轮播控件，内部基于ViewPager2实现，Indicator和UI都可以自定义。
Tools to work with android .dex and java .class files
greenDAO is a light & fast ORM solution for Android that maps objects to SQLite databases.
Cute view animation collection.
Realm is a mobile database: a replacement for SQLite & ORMs
android 4.4以上沉浸式状态栏和沉浸式导航栏管理，适配横竖屏切换、刘海屏、软键盘弹出等问题，可以修改状态栏字体颜色和导航栏图标颜色，以及不可修改字体颜色手机的适配，适用于Activity、Fragment、DialogFragment、Dialog，PopupWindow，一句代码轻松实现，以及对bar的其他设置，详见README。简书请参考：http://www.jianshu.c…
jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.
A declarative API to handle Android runtime permissions.
Multitask、MultiThread(MultiConnection)、Breakpoint-resume、High-concurrency、Simple to use、Single/NotSingle-process