https://github.com/greenrobot/greenDAO
二维码：
BGAQRCode-Android
QRCode 扫描二维码、扫描条形码、相册获取图片后识别、生成带 Logo 二维码、支持微博微信 QQ 二维码扫描样式
https://github.com/bingoogolapple/BGAQRCode-Android
QRCodeReaderView
Modification of ZXING Barcode Scanner project for easy Android QR-Code detection and AR purposes 这个是国外大神写的
https://github.com/dlazaro66/QRCodeReaderView
AwesomeQRCode
一个优雅的QR 二维码生成器
https://github.com/SumiMakito/AwesomeQRCode
zxing
ZXing (“Zebra Crossing”) barcode scanning library for Java, Android. Google官方二维码解析方案
https://github.com/zxing/zxing/tree/master/android
网络请求库：
OkGo
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
https://github.com/jeasonlzy/okhttp-OkGo
RxHttp
OkHttp+RxJava 一条链发送请求，自动关闭未完成的请求,RxJava无缝衔接
https://github.com/liujingxing/RxHttp/tree/master
okhttp
An HTTP+HTTP/2 client for Android and Java applications.
https://github.com/square/okhttp
Volley
Volley is an HTTP library that makes networking for Android apps easier and, most importantly, faster.
https://github.com/google/volley
CoreProgress
CoreProgress is a framework to support OkHttp upload and download progress
https://github.com/lizhangqu/CoreProgress
KryoNet
KryoNet is a Java library that provides a clean and simple API for efficient TCP and UDP client/server network communication using NIO. KryoNet runs on both the desktop and on Android.
https://github.com/EsotericSoftware/kryonet#tcp-and-udp
MultiThreadDownloader
基于HttpURLConnection实现的多线程下载器
https://github.com/moz1q1/MultiThreadDownloader
Adapter：
RecyclerViewAdapter
一个支持RecyclerView加载更多、添加HeaderView的BaseAdapter
https://github.com/SheHuan/RecyclerViewAdapter
BaseRecyclerViewAdapterHelper
强大的RecyclerViewAdapter万能适配器
https://github.com/CymChad/BaseRecyclerViewAdapterHelper
CommonAdapter
一个适用于ListView/GridView/RecyclerView的Adapter库,简化大量重复代码,支持多种布局,可自定义图片加载的实现。
https://github.com/qyxxjd/CommonAdapter
EasyAdapter
Android 轻量级适配器，简化使用，适应所有的AbsListView、RecyclerView。支持HeaderView与FooterView~
https://github.com/smuyyh/EasyAdapter
baseAdapter
Android 万能的Adapter for ListView,RecyclerView,GridView等，支持多种Item类型的情况。
https://github.com/hongyangAndroid/baseAdapter
图片选择器：
RxGalleryFinal
RxGalleryFinal是一个android图片/视频文件选择器。其支持多选、单选、拍摄和裁剪，主题可自定义，无强制绑定第三方图片加载器。
https://github.com/FinalTeam/RxGalleryFinal
TakePhoto
一款用于在Android设备上获取照片（拍照或从相册、文件中选择）、裁剪图片、压缩图片的开源工具库
https://github.com/crazycodeboy/TakePhoto
ImageSelector
Photo picker library for Android. Support single choice、multi-choice、cropping image and preview image.
https://github.com/ioneday/ImageSelector
RxImagePicker
RxImagePicker是一个用于Android的响应式图片选择器，它将您的图片选择需求转换为一个接口进行配置，并在任何一个Activity或者Fragment中展示任何样式的图片选择UI。j基于RxJava和注解的方式，提供了知乎和微信主题的支持。
https://github.com/qingmei2/RxImagePicker
文件选择器：
MultiType-FilePicker
多类型的文件选择器
https://github.com/fishwjy/MultiType-FilePicker
Android-FilePicker
Photopicker and document picker for android
https://github.com/DroidNinja/Android-FilePicker
android-filepicker
Selecting directories/files made a lot easier.
https://github.com/Angads25/android-filepicker
日历/时间选择：
SuperCalendar
自定义日历控件 支持左右无限滑动 周月切换 标记日期显示 自定义显示效果跳转到指定日期
https://github.com/MagicMashRoom/SuperCalendar
CalendarExaple
android高仿钉钉和小米的自定义日历控件（支持阴历和阳历，左右无限翻页viewpager）
https://github.com/codbking/CalendarExaple
AndroidCalendar
日历收集大集合
https://github.com/dalong982242260/AndroidCalendar
GregorianLunarCalendar
GregorianLunarCalendar提供了农历+公历的日期选择模式，同时支持公历+农历的无缝切换
https://github.com/Carbs0126/GregorianLunarCalendar
android-calendar-view
显示阳历，农历，节假日和二十四节气 实现对某月日期的单选或者多选的andorid 日历控件库
https://github.com/myjoybar/android-calendar-view
DatePicker
Useful and powerful date picker 灰常灰常简单的Android日历选择器
https://github.com/AigeStudio/DatePicker
CalendarListview
Implementation of a calendar in a ListView. One month by row
https://github.com/traex/CalendarListview
PickTime
一个Android高效日期选择控件，支持（年月日时分星期）等多种模式的控件
https://github.com/codbking/PickTime
路由跳转：
ARouter
一个用于帮助 Android App 进行组件化改造的框架 —— 支持模块间的路由、通信、解耦。阿里出品
https://github.com/alibaba/ARouter
事件总线：
EventBus
EventBus is a publish/subscribe event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.
https://github.com/greenrobot/EventBus
UI控件：
awesome-github-android-ui
UI开源控件库大集合
https://github.com/opendigg/awesome-github-android-ui
FastScroll
A ListView-like FastScroller for Android’s RecyclerView.
https://github.com/L4Digital/FastScroll
Android-QuickSideBar
帮助快速查阅对应分组的侧边栏
https://github.com/Bigkoo/Android-QuickSideBar
SimpleRatingBar
打分、评级、星级评分软件，替代Android原始的RatingBar
https://github.com/FlyingPumba/SimpleRatingBar
DrawableTextView
这是一个对TextView进行了简单封装的小控件，可以简单地设置TextView四个方向上的图标，及图标的大小。
https://github.com/Yunfeng1u/DrawableTextView
CompoundIconTextView
An android library that is able to set a vector drawable at text view pre-Lollipop.
https://github.com/AAkira/CompoundIconTextView
TextViewDrawable
TextView Drawable位置大小可控
https://github.com/ithedan/TextViewDrawable
SwitchButton
A cute widget of Switch Button for you to create beautiful and friendly UI. Edit Add topics
https://github.com/kyleduo/SwitchButton
flexbox-layout
Google转为Android提供的类似CSS中的Flex属性布局，支持自动换行
https://github.com/google/flexbox-layout
FlowLayout
Android流式布局，支持单选、多选等，适合用于产品标签等，鸿洋出品。
https://github.com/hongyangAndroid/FlowLayout
BubbleView
BubbleView是带箭头的Android气泡控件/容器类，支持在布局中通过自定义属性或代码进行丰富的定制
https://github.com/cpiz/BubbleView
BubbleTextView
Android Bubble View
https://github.com/dupengtao/BubbleTextView
RecorderWave
高仿Tencent OS录音机波形动画
https://github.com/hjm1fb/RecorderWave
ZLayoutManager
Some custom LayoutManager .Such as SwipeCard、FLowLayout。一些自定义的LayoutManager，仿探探、人人影视 炫动滑动 卡片层叠 和流式布局等。
https://github.com/mcxtzhang/ZLayoutManager
CoordinatorLayoutExample
这是使用CoordinatorLayout打造 打造炫酷效果的例子
https://github.com/gdutxiaoxu/CoordinatorLayoutExample
LiveLayout
类似于映客，快手，等直播APP布局，直播刷礼物特效，定时清除礼物，计时器，圆形头像，横向listview等！！！
https://github.com/Qiang3570/LiveLayout
TextViewExpandableAnimation
Expandable TextView With Smooth Transition Animation
https://github.com/freecats/TextViewExpandableAnimation
JJSearchViewAnim
一个炫酷的SearchView搜索动画库
https://github.com/android-cjj/JJSearchViewAnim
AndroidSwipeLayout
The Most Powerful Swipe Layout! 常见的列表中Item水平侧滑删除功能
https://github.com/daimajia/AndroidSwipeLayout
WrapRecyclerView
一个可以添加头部和尾部的RecyclerView，并且提供了一个 WrapAdapter, 它可以让你轻松为 RecyclerView 添加头部和尾部。
https://github.com/xuehuayous/WrapRecyclerView
Android-LoopView
LoopView 是一个强大的轮播大图控件，并且提供了许多配置方法来达到您的显示效果和需求。
https://github.com/xuehuayous/Android-LoopView
android-floating-action-button
Material Desig风格的浮动按钮及菜单。浮动按钮既可以单独使用，也可以添加到菜单中作为菜单项。
https://github.com/futuresimple/android-floating-action-button
android-percent-support-extend
一个基于Google百分比布局库的扩展支持库，鸿洋大神出品
https://github.com/hongyangAndroid/android-percent-support-extend
PatternedEditText
A custom EditText for Android that shows its text according to a pre-defined pattern.
https://github.com/faradaj/PatternedEditText
MultiLineRadioGroup
Android RadioGroup with multiLine (多行RadioGroup)
https://github.com/a284628487/MultiLineRadioGroup
Leonids
A Particle System for standard Android UI 粒子特效
https://github.com/plattysoft/Leonids
TextViewOverflowing
Custom Android view to allow reflowing text from one TextView to another
https://github.com/JustinAngel/TextViewOverflowing
PagingGridView
A Paging GridView with the same behavior as PagingListView. Basically is a GridView with the ability to add more items on it when reaches the end of the list.
https://github.com/nicolasjafelle/PagingGridView
ImageView：
PhotoView
Implementation of ImageView for Android that supports zooming, by various touch gestures.
https://github.com/chrisbanes/PhotoView
RoundedImageView
A fast ImageView that supports rounded corners, ovals, and circles.
https://github.com/vinc3m1/RoundedImageView
GifImageView
Android ImageView that handles animated GIF images
https://github.com/felipecsl/GifImageView
ImageViewTouch
ImageViewTouch is an android ImageView widget with zoom and pan capabilities.
https://github.com/sephiroth74/ImageViewZoom
Rangebar/Seekbar：
RangeSliderView
Android Range Slider View
https://github.com/channguyen/range-slider-view
android-range-seek-bar
It provides a SeekBar similar to the default Android one, but with two thumb controls allowing a range to be selected.
https://github.com/anothem/android-range-seek-bar
material-range-bar
Android widget for selecting a range of values.
https://github.com/oli107/material-range-bar
DiscreteSeekbar
具有个性化thumb的Seekbar
https://github.com/AnderWeb/discreteSeekBar
GBSlideBar
类似uber/滴滴等app的滑动选择工具条
https://github.com/edanel/GBSlideBar
ViewPager：
MagicViewPager
单页显示3个Item的ViewPager炫酷切换效果，适用于Banner等
https://github.com/hongyangAndroid/MagicViewPager
JazzyViewPager
ViewPager酷炫切换动画
https://github.com/jfeinstein10/JazzyViewPager
DoubleViewPager
Horizontal + Vertical ViewPager，you can swype in X and Y
https://github.com/juliome10/DoubleViewPager
CircularBarPager
An android view pager wrapped inside of a circular progress bar
https://github.com/omadahealth/CircularBarPager
FlipViewPager.Draco
This project aims to provide a working page flip implementation for usage in ListView
https://github.com/Yalantis/FlipViewPager.Draco
ListView：
ListViewUpdate
ListView局部更新
https://github.com/linglongxin24/ListViewUpdate
PagingListView
ListView滑动到底部自动加载更多
https://github.com/nicolasjafelle/PagingListView
下拉刷新：
android-Ultra-Pull-To-Refresh
继承于ViewGroup可以包含任何View的下拉刷新方案，功能比SwipeRefreshLayout强大，支持定制UI样式
https://github.com/liaohuqiu/android-Ultra-Pull-To-Refresh
PopMenu/DropMenu/菜单：
Droppy
A simple yet-powerful and fully customizable Android drop-down menu
https://github.com/shehabic/Droppy
DropDownMenu
一个实用的多条件筛选菜单
https://github.com/dongjunkun/DropDownMenu
IndicatorDialog
a dialog with arrow indicator in the location where you want
https://github.com/jiang111/IndicatorDialog
showPopWindow_meituan
实现像美团一样的功能，地图定位功能；搜索地方等；
http://www.see-source.com/androidwidget/detail.html?wid=624
CityPicker
城市选择、定位、搜索及右侧字母导航，类似美团 百度糯米 饿了么等APP选择城市功能
https://github.com/zaaach/CityPicker
AndroidTreeView
可自定义节点的、可添加删除节点的树形菜单。
https://github.com/bmelnychuk/AndroidTreeView
Side-Menu.Android
Side menu with some categories to choose.一个酷炫动画的侧滑菜单
https://github.com/Yalantis/Side-Menu.Android
水波纹效果：
android-ripple-background
A beautiful ripple animation for your app
https://github.com/skyfishjy/android-ripple-background
RippleView
A simple ripple view for Android
https://github.com/ruzhan123/RippleView
RippleView
View that imitates Ripple Effect on click which was introduced in Android L (for Android 2.3+)
https://github.com/siriscac/RippleView
RippleEffect
Implementation of Ripple effect from Material Design for Android API 9+
https://github.com/traex/RippleEffect
状态栏颜色：
StatusBarCompat
Status Bar Utils ---- Change Status Bar Mode Simply
https://github.com/niorgai/StatusBarCompat
Dialog弹窗：
FlycoDialog
An Android Dialog Lib simplify customization.
https://github.com/H07000223/FlycoDialog_Master
material-dialogs
A beautiful, fluid, and customizable dialogs API
https://github.com/afollestad/material-dialogs
Android-AlertView
仿iOS的AlertViewController
https://github.com/Bigkoo/Android-AlertView
BlurDialogFragment
display DialogFragment with a burring effect behind
https://github.com/tvbarthel/BlurDialogFragment
SVProgressHUD
一个加载弹窗库
https://github.com/Bigkoo/Android-SVProgressHUD
滚轮控件/PickerView：
Android-PickerView
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）
https://github.com/Bigkoo/Android-PickerView
WheelPicker
Simple and fantastic wheel view in realistic effect for android.
https://github.com/AigeStudio/WheelPicker
NumberPickerView
another NumberPicker with more flexible attributes on Android platform
https://github.com/Carbs0126/NumberPickerView
Indicator指示器/Tab：
MagicIndicator
强大、可定制、易扩展的 ViewPager 指示器框架。是ViewPagerIndicator、TabLayout、PagerSlidingTabStrip的最佳替代品。支持角标，更支持在非ViewPager场景下使用（使用hide()、show()切换Fragment或使用setVisibility切换FrameLayout里的View等）
https://github.com/hackware1993/MagicIndicator
AlphaTabsIndicator
高仿微信底部状态栏的轻量级库，没有MagicIndicator那么臃肿，符合大多数BottomTabBar应用设计需求，Android Navigation Bar , 高仿微信底部状态栏的轻量级库
https://github.com/yingLanNull/AlphaTabsIndicator
ViewPagerIndicator
Indicator 取代 tabhost，实现网易顶部tab，新浪微博主页底部tab，引导页，无限轮播banner等效果，高度自定义tab和特效
https://github.com/LuckyJayce/ViewPagerIndicator
PageIndicatorView
An page indicator for Android ViewPager
https://github.com/romandanylyk/PageIndicatorView
AndroidRubberIndicator
一个可爱型的ViewPager指示器
https://github.com/LyndonChin/AndroidRubberIndicator
徽章/红点消息提醒：
BGABadgeView-Android
Android 徽章控件
https://github.com/bingoogolapple/BGABadgeView-Android
图表：
XCL-Charts
Android开源图表库，支持柱形图、饼图、折线图、曲线图等各种丰富的图表
https://github.com/xcltapestry/XCL-Charts
MPAndroidChart
A powerful & easy to use chart library for Android
https://github.com/PhilJay/MPAndroidChart
hellocharts-android
Charts/graphs library for Android compatible with API 8+, several chart types with support for scaling, scrolling and animations
https://github.com/lecho/hellocharts-android
https://blog.youkuaiyun.com/true100/article/details/72782639（PieChartView使用介绍）
TableFixHeaders
Android library that implements a table with fixed headers.
https://github.com/InQBarna/TableFixHeaders
依赖注入框架：
Butter Knife
Bind Android views and callbacks to fields and methods.
https://github.com/JakeWharton/butterknife
Dagger 2
A fast dependency injector for Android and Java.
https://github.com/google/dagger
Json解析：
fastjson
A fast JSON parser/generator for Java 阿里出品
https://github.com/alibaba/fastjson
热修复框架：
Tinker
Tinker is a hot-fix solution library for Android, it supports dex, library and resources update without reinstall apk. 腾讯出品
https://github.com/Tencent/tinker
Robust
Robust是新一代热更新系统，无差别兼容Android2.3-8.0版本；无需重启补丁实时生效，快速修复线上问题，补丁修补成功率高达99.9%。 美团出品
https://github.com/Meituan-Dianping/Robust
RocooFix
Another hotfix framework框架原理与美团robust框架类似
https://github.com/dodola/RocooFix
Nuwa
Nuwa, pure java implementation, can hotfix your android application.
https://github.com/jasonross/Nuwa
Camera：
android-Camera2Basic
Google官方Camera2 API使用范例
https://github.com/googlesamples/android-Camera2Basic
CameraView
Google提供的CameraView方便简化使用Camera实现拍照录像功能
https://github.com/google/cameraview
相关链接：Android相机开发——CameraView源码解析
轻松玩转Camera,修改CameraView 实现自定义拍照分辨率
图片加载库：
picasso
A powerful image downloading and caching library for Android
https://github.com/square/picasso
picasso-transformations
An Android transformation library providing a variety of image transformations for Picasso
https://github.com/wasabeef/picasso-transformations
glide
Glide是一个快速高效的Android图片加载库，注重于平滑的滚动。提供易用的API，高性能、可扩展的图片解码管道以及自动的资源池技术。
https://github.com/bumptech/glide
WorldMap
一个加载高清巨图的例子，可提供加载高清巨图的解决方案
https://github.com/johnnylambada/WorldMap
手势/多点触控：
android-gesture-detectors
Gesture detector framework for multitouch handling on Android, based on Android’s ScaleGestureDetector 老外写的手势监听库，方便监听处理缩放旋转手势等
https://github.com/Almeros/android-gesture-detectors
zip压缩/解压：
Mzip-Android
An Android compress and extract library support popular compression format such as rar, zip that support android api >= 14 (may work >=9 not tested) also tested on android 7.1.1
https://github.com/ghost1372/Mzip-Android
AndroidP7zip
An Android compress and extract library support popular compression format such as rar, zip, tar, lzma. based on p7zip.
https://github.com/hzy3774/AndroidP7zip
ANR-WatchDog：
ANR-WatchDog
A simple watchdog that detects Android ANR (Application Not Responding) error and throws a meaningful exception
https://github.com/SalomonBrys/ANR-WatchDog
Android Studio：
VariantsDemo
在Android Studio下使用Gradle，进行多版本代码管理的示例, 通过productFlavors功能实现
https://github.com/Jasonchenlijian/VariantsDemo
FFMPEG：
FFmpegMediaMetadataRetriever
FFmpegMediaMetadataRetriever provides a unified interface for retrieving frame and meta data from an input media file.
https://github.com/wseemann/FFmpegMediaMetadataRetriever
android-open-project：
android-open-project
Android 开源项目分类汇总
https://github.com/Trinea/android-open-project
OAuth：
scribejava
简单的Java实现的OAuth客户端库，支持OAuth/OAuth2
https://github.com/scribejava/scribejava
H5/JS框架：
mui
最接近原生APP体验的高性能框架
https://github.com/dcloudio/mui
weui
A UI library by WeChat official design team, includes the most useful widgets/modules in mobile web applications.
https://github.com/Tencent/weui
jquery-mobile
jQuery Mobile Framework
https://github.com/jquery/jquery-mobile
YUI Compressor
YUI Compressor
https://github.com/yui/YUI Compressor
distpicker—jQuery
A simple jQuery plugin for picking provinces, cities and districts of China. (中国 / 省市区 / 三级联动 / 地址选择器)
https://github.com/fengyuanchen/distpicker
datepicker—jQuery
A simple jQuery datepicker plugin.
https://github.com/fengyuanchen/datepicker
imageViewer—jQuery
A simple jQuery image viewing plugin.
https://github.com/fengyuanchen/viewer
cropper—jQuery
A simple jQuery image cropping plugin.
https://github.com/fengyuanchen/cropper
NoSleep.js
Prevent display sleep and enable wake lock in any Android or iOS web browser.
https://github.com/richtr/NoSleep.js
React Native：
React Native
A framework for building native mobile apps using JavaScript and React. Learn once, write anywhere. Facebook出品
https://github.com/facebook/react-native
android-wechat-tool：
android-wechat-tool
Android实现微信抢红包的原理
https://github.com/kompasim/android-wechat-tool
两个Android开源库搜索神器：
看源社区
这个主要是一些开源的组件效果等
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