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

It is suitable for fingerprint identification of Android 6.0 to Android 9.0+

Android 代码规范文档

Picture Selector Library for Android or 图片选择器

Interactive, thoroughly customizable maps in native Android, iOS, macOS, Node.js, and Qt applications, powered by vector tiles and OpenGL

基于toasty,单例化,简化api.看遍toast相关开源库,Toasty的UI最美,单例化后最优雅

轻量级的Android MVP快速开发框架

OkGo - 3.0 震撼来袭，该库是基于 Http 协议，封装了 OkHttp 的网络请求框架，比 Retrofit 更简单易用，支持 RxJava，RxJava2，支持自定义缓存，支持批量断点下载管理和批量上传管理功能

Library for Android Camera 1 and 2 APIs. Massively increase stability and reliability of photo and video capture on all Android devices.

Wave,水波,Android 炫酷的多重水波纹 MultiWaveHeader

A curated list of awesome Android UI/UX libraries

🏦 由银行卡卡号解析出发卡行和卡别，适用于中国国内多数银行，返回JSON数据。

HTML5 canvas based smooth signature drawing

AndroidImageEdit 安卓设备上图形编辑开源控件，支持磨皮美白 自定义贴图 图片滤镜 图片旋转 图片剪裁 文字贴图 撤销 回退 等操作

一个简单的 android 轻量级 orm 框架，基于注解机制，支持自动创建表，保存记录时自动判断新增和修改。

Bootstrap style widgets for Android, with Glyph Icons

Android Scrolling Background Bitmap Example

RichEditor for Android is a beautiful Rich Text WYSIWYG Editor for Android.

🍋 Android实现Http标准协议框架，支持多种缓存模式，底层可动态切换OkHttp、URLConnection。

多种下拉刷新效果、上拉加载更多、可配置自定义头部广告位

Bubble Notification with explosion animation.

Java client for the Tinify API.

Viewer is a configurable application template that enables you to display an ArcGIS web map using a variety of tools.

Open-Source Android Apps

iOS风格SwitchButton。 只涉及到一个类文件，异常容易集成进入你的项目。支持开关的"延时和回滚"操作。only one class file, very easy to integrate into your program. support the delay operation and rolling back action of the switch

🐮 HandlerFrame是一个基于观察者模式采用信息分发机制实现跨界面Handler通讯框架，整个项目里面只存在一个Handler实例对象。

An Android library supports sticking the navigator on the top when ItemView scrolls in Viewpager.

OpenLayers

Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.

🍈 RecyclerView侧滑菜单，Item拖拽，滑动删除Item，自动加载更多，HeaderView，FooterView，Item分组黏贴。