android-Intent，Injector，Template，Adapter，Validation，Gesture，Game，Game Engine，Bluetooth...

Intent

Intent

1. PhotoPicker 图片选择 & 图片预览
   https://github.com/donglua/PhotoPicker

Injector

1. AndroidAnnotations Fast Android Development. Easy maintainance. https://github.com/excilys/androidannotations
2. roboguice Google Guice on Android, version 2.0
   https://github.com/roboguice/roboguice
3. butterknife View "injection" library for Android.
   https://github.com/JakeWharton/butterknife
4. dagger A fast dependency injector for Android and Java.
   https://github.com/square/dagger
5. PreferenceInjector A SharedPreference injection library for Android
   https://github.com/denley/PreferenceInjector
6. transfuse Transfuse - A Dependency Injection and Integration framework for Google Android
   https://github.com/johncarl81/transfuse
7. SwissKnife A multi-purpose library containing view injection and threading for Android using annotations
   https://github.com/Arasthel/SwissKnife
8. LiteAuto lite your android ! the code is on the way~ http://lihttp//litesuits.com?from=auto
   https://github.com/litesuits/android-lite-auto
9. fragmentargs Annotation Processor for setting arguments in android fragments http://hannesdorfmann.com/android/fragmentargs/
   https://github.com/sockeqwe/fragmentargs

Template

1. android-material-drawer-template An Android template with navigation drawer for material design
   https://github.com/kanytu/android-material-drawer-template
2. material-design-icons-adt-template Android Studio / Eclipse ADT template for material-design-icons resources
   https://github.com/intrications/material-design-icons-adt-template
3. OnActivityResult Generates boilerplate code for OnActivityResult callbacks and lets you focus on what matters
   https://github.com/vanniktech/OnActivityResult

Adapter

1. SuperAdapter Adapter(BaseAdapter, RecyclerView.Adapter) wrapper for android. 一个Adapter同时适用RecyclerView、ListView、GridView等。 http://www.jianshu.com/p/d6a76fd3ea5b
   https://github.com/byteam/SuperAdapter
2. LastAdapter Don't write a RecyclerView adapter again. Not even a ViewHolder!
   https://github.com/nitrico/LastAdapter
3. BGAAdapter-Android 在AdapterView和RecyclerView中通用的Adapter和ViewHolder
   https://github.com/bingoogolapple/BGAAdapter-Android
4. MultiChoiceAdapter Android - A ListView adapter with support for multiple choice modal selection
   https://github.com/ManuelPeinado/MultiChoiceAdapter
5. easy-adapter Easy Adapters library for Android
   https://github.com/ribot/easy-adapter
6. Renderers Renderers is an Android library that avoids all the boilerplate needed to create a new ListView adapter.
   https://github.com/pedrovgs/Renderers
7. FunDapter Simplify Adapter creation for your Android ListViews.
   https://github.com/amigold/FunDapter
8. instant-adapter Just like instant coffee, saves 78% of your time on Android's Custom Adapters.
   https://github.com/ragunathjawahar/instant-adapter
9. adapter-kit Adapter Kit is a set of useful adapters for Android.
   https://github.com/mobsandgeeks/adapter-kit
10. EfficientAdapter An efficient adapter to make the use of RecyclerView much easier for Android.
    https://github.com/StanKocken/EfficientAdapter
11. EasyListViewAdapters This library provides Easy Android ListView Adapters(EasyListAdapter & EasyCursorAdapter) which makes designing Multi-Row-Type ListView very simple & cleaner, It also provides many useful features for ListView.
    https://github.com/birajpatel/EasyListViewAdapters
12. GridListViewAdapters This library provides GridAdapters(ListGridAdapter & CursorGridAdapter) which enable you to bind your data in grid card fashion within android.widget.ListView, Also provides many other features related to GridListView.
    https://github.com/birajpatel/GridListViewAdapters
13. RxRecyclerAdapter Rx based generic RecyclerView Adapter Library with support for sections.
    https://github.com/ahmedrizwan/RxRecyclerAdapter
14. SectionedRecyclerViewAdapter An Adapter that allows a RecyclerView to be split into Sections with headers and/or footers. Each Section can have its state(Loading/Loaded/Failed) controlled individually.
    https://github.com/luizgrp/SectionedRecyclerViewAdapter

Validation

1. android-saripaar UI Validation Library for Android
   https://github.com/ragunathjawahar/android-saripaar

Gesture

1. android-gesture-detectors Gesture detector framework for multitouch handling on Android, based on Android's ScaleGestureDetector
   https://github.com/Almeros/android-gesture-detectors
2. sensey Android library which makes detecting gestures a breeze
   https://github.com/nisrulz/sensey

Game

1. Space in Charge Yet another 2D space-war game made with Unity3D for Android
   https://github.com/yaa110/Space-in-Charge

Game Engine

1. cocos2d-x cocos2d-x for C++
   https://github.com/cocos2d/cocos2d-x/
2. libgdx Desktop/Android/HTML5/iOS Java game development framework
   https://github.com/libgdx/libgdx
3. AndEngine Free Android 2D OpenGL Game Engine
   https://github.com/nicolasgramlich/AndEngine
4. playn A Java game development framework that deploys to JVM, HTML5, Android and iOS.
   https://github.com/threerings/playn
5. LGame This is free 2d game development framework(Java Game Engine), support JavaSE/Android/IOS/WP7/HTML5/PSM/Linux/MAC/Windows.
   https://github.com/cping/LGame
6. LiquidFun LiquidFun is a 2D physics engine for games Developed by GOOGLE
   https://github.com/google/liquidfun
7. jbox2d a 2d Java physics engine, native port of the C++ physics engines Box2D and LiquidFun
   https://github.com/jbox2d/jbox2d
8. JustWeEngine An easy open source Android Native Game FrameWork. https://github.com/lfkdsk/JustWeEngine

Bluetooth

1. android-beacon-library Allows Android apps to interact with BLE beacons
   https://github.com/AltBeacon/android-beacon-library
2. Android-BluetoothSPPLibrary Bluetooth Serial Port Profile which comfortable to developer application to communication with microcontroller via bluetooth
   https://github.com/akexorcist/Android-BluetoothSPPLibrary
3. AndroidSmoothBluetooth Smooth communication via bluetooth with other android devices or microcontrollers such as Arduino.
   https://github.com/palaima/AndroidSmoothBluetooth
4. LiteBle BLE Framework. Based on Bluetooth 4.0. Based on callback. Extremely simple! Communication with BluetoothLE(BLE) device as easy as HTTP communication. Android低功耗蓝牙便捷操作框架，基于回调，完成蓝牙设备交互就像发送网络请求一样简单。 http://litesuits.com?form=gble
   https://github.com/litesuits/android-lite-bluetoothLE
5. BluetoothHelper Bluetooth Helper Library.—-蓝牙操作库
   https://github.com/a-voyager/BluetoothHelper

SocialNetworks

1. AndroidSocialNetworks Library for easy work with Facebook, Twitter, LinkedIn and Google on Android
   https://github.com/antonkrasov/AndroidSocialNetworks#license

XMPP

1. Smack An Open Source XMPP Client Library written in Java for JVMs and Android
   https://github.com/igniterealtime/Smack
2. Xabber Open source Jabber (XMPP) client with multi-account support, clean and simple interface. Being both free (as in freedom!) and ad-free, Xabber is designed to be the best Jabber client for Android.
   https://github.com/redsolution/xabber-android
3. Conversations Conversations is an open source XMPP (formally known as Jabber) client for Android 4.0+ smart phones.
   https://github.com/siacs/Conversations
4. yaxim YAXIM - Yet Another XMPP Instant Messenger, a jabber client for android
   https://github.com/pfleidi/yaxim
5. androidpn An open source project to provide push notification support for Android -- a xmpp based notification server and a client tool kit.
   https://github.com/dannytiehui/androidpn
6. Android-Paho-Mqtt-Service A simple MQTT Service that will keep running for the duration of your Android application using the Paho Java MQTT Client.
   https://github.com/JesseFarebro/Android-Mqtt

Code Generation

1. parceler Android Parcelables made easy through code generation.
   https://github.com/johncarl81/parceler
2. auto-parcel Android Parcelable models made easy
   https://github.com/frankiesardo/auto-parcel
3. RoboCoP Pure Java code generation tool for generating a fully functional ContentProvider for Android.
   https://github.com/mediarain/RoboCoP
4. android-contentprovider-generator A small tool to generate an Android ContentProvider.
   https://github.com/BoD/android-contentprovider-generator
5. ParcelablePlease Annotation Processor for generating Parcelable code
   https://github.com/sockeqwe/ParcelablePlease
6. pojobuilder A Java Code Generator for Pojo Builders
   https://github.com/mkarneim/pojobuilder
7. javawriter A utility class which aids in generating Java source files.
   https://github.com/square/javawriter
8. Barber A custom view styling library for Android that generates the obtainStyledAttributes() and TypedArray boilerplate code for you.
   https://github.com/hzsweers/barber
9. ContentProviderCodeGenerator A code generator to create Android ContentProvider
   https://github.com/foxykeep/ContentProviderCodeGenerator
10. Android-AnnotatedSQL Android library for auto generating SQL schema and Content Provider by annotations. You will get a full-featured content provider in 5 minutes :)
    https://github.com/hamsterksu/Android-AnnotatedSQL
11. Favor A easy way to use android sharepreference http://cocosw.com/Favor/
    https://github.com/soarcn/Favor

Media

1. AndroidVideoCache Cache support for any video player with help of single linehttps://github.com/danikula/AndroidVideoCache
2. FFmpeg mirror of git://source.ffmpeg.org/ffmpeg.git
   https://github.com/FFmpeg/FFmpeg
3. FFMpeg this is port of ffmpeg for android (this is app, but in future i will do android lib from it and then system will be able to convert videos automatically)
   https://github.com/havlenapetr/FFMpeg
4. libstreaming A solution for streaming H.264, H.263, AMR, AAC using RTP on Android
   https://github.com/fyhertz/libstreaming
5. AndroidFFmpeg FFmpeg build for android random architectures with example jni
   https://github.com/appunite/AndroidFFmpeg
6. android-ffmpeg-java Android Java wrapper around ffmpeg command line binary
   https://github.com/guardianproject/android-ffmpeg-java
7. FFmpeg-Android Script and Instructions for building FFmpeg for Android
   https://github.com/OnlyInAmerica/FFmpeg-Android
8. android-ffmpeg a system for building custom ffmpeg binaries for Android
   https://github.com/guardianproject/android-ffmpeg
9. android-ffmpeg-with-rtmp This repository contains script(s) to build ffmpeg for android with RTMP (and OpenSSL) support.
   https://github.com/cine-io/android-ffmpeg-with-rtmp
10. mp4parser A Java API to read, write and create MP4 files
    https://github.com/sannies/mp4parser
11. jcodec jcodec - a pure java implementation of video/audio codecs.
    https://github.com/jcodec/jcodec
12. ipcam-view MJPEG video streaming on Android
    https://github.com/niqdev/ipcam-view
13. AndroidAudioConverter Convert audio files inside your Android app easily. This is a wrapper of FFmpeg-Android-Java lib.
    https://github.com/adrielcafe/AndroidAudioConverter

Embedded

1. usb-serial-for-android Android USB host serial driver library for CDC, FTDI, Arduino and other devices.
   https://github.com/mik3y/usb-serial-for-android

Utility

1. StatusBarUtil StatusBarUtil 状态栏工具类（实现沉浸式状态栏/变色状态栏）
   https://github.com/laobie/StatusBarUtil
2. LowPoly LowPoly is implemented by JNI, so it's much faster than other in java.
   https://github.com/CoXier/LowPoly
3. easydeviceinfo Android library to get device information in a super easy way. http://nisrulz.github.io/easydeviceinfo
   https://github.com/nisrulz/easydeviceinfo
4. StatusBarUtil A util for setting status bar style on Android App. It can work above API 19(KitKat 4.4).
   https://github.com/laobie/StatusBarUtil
5. apk-parser Apk parser lib with java
   https://github.com/caoqianli/apk-parser
6. APKParser APK parser for Android
   https://github.com/jaredrummler/APKParser
7. JustWeTools JustWeTools - Some useful tools
   https://github.com/lfkdsk/JustWeTools
8. AndroidProcesses Get running processes on Android http://jaredrummler.github.io/AndroidProcesses
   https://github.com/jaredrummler/AndroidProcesses
9. AndroidProcess 判断指定App是否位于前台的方法
   https://github.com/wenmingvs/AndroidProcess
10. smoothie Easy async loading for Android's ListView/GridView
    https://github.com/lucasr/smoothie
11. tape A lightning fast, transactional, file-based FIFO for Android and Java.
    https://github.com/square/tape
12. ColorArt iTunes 11-style color matching code for Android
    https://github.com/MichaelEvans/ColorArt
13. AndroidBillingLibrary Android Market In-app Billing Library
    https://github.com/robotmedia/AndroidBillingLibrary
14. android-saripaar UI Validation Library for Android
    https://github.com/ragunathjawahar/android-saripaar
15. timber A logger with a small, extensible API which provides utility on top of Android's normal Log class.
    https://github.com/JakeWharton/timber
16. wire Clean, lightweight protocol buffers for Android.
    https://github.com/square/wire
17. motion An Android library allowing images to exhibit a parallax effect that reacts to the device's tilt
    https://github.com/nvanbenschoten/motion
18. Colours A beautiful set of predefined colors and a set of color methods to make your Android development life easier.
    https://github.com/MatthewYork/Colours
19. Android-Validator Form Validator Library for Android
    https://github.com/throrin19/Android-Validator
20. svg-android Support for scalable vector graphics in Android
    https://github.com/pents90/svg-android
21. vector-compat A support library for VectorDrawable and AnimatedVectorDrawable classes introduced in Lollipop
    https://github.com/wnafee/vector-compat
22. MrVector AKA VectorDrawableCompat: A 7+ backport of VectorDrawable.
    https://github.com/telly/MrVector
23. sharp Scalable vector graphics for Android
    https://github.com/Pixplicity/sharp
24. SVG Kit for Android SVG Kit for Android is a flexible and quite fast library supporting SVG Tiny specs.
    http://scand.com/products/svgkit-android/index.html
25. davdroid DAVdroid – CalDAV/CardDAV synchronization for Android 4+ devices
    https://github.com/rfc2822/davdroid
26. phrase
    https://github.com/square/phrase
27. seismic Android device shake detection.
    https://github.com/square/seismic
28. android-validation-komensky A simple library for validating user input in forms using annotations.
    https://github.com/inmite/android-validation-komensky
29. AndroidFaceCropper Android bitmap Face Cropper
    https://github.com/lafosca/AndroidFaceCropper
30. AutobahnAndroid WebSocket & WAMP in Java for Android
    https://github.com/tavendo/AutobahnAndroid
31. android_dbinspector Android library for viewing in app databases.
    https://github.com/infinum/android_dbinspector
32. wishlist Utilities I wish Android had but doesn't
    https://github.com/kevinsawicki/wishlist
33. joda-time-android Joda-Time library with Android specialization
    https://github.com/dlew/joda-time-android
34. OpenKeychain OpenKeychain is an OpenPGP implementation for Android.
    https://github.com/open-keychain/open-keychain
35. Silk A library containing a large set of utilities and views for Android apps.
    https://github.com/afollestad/Silk
36. Reservoir Android library to easily serialize and cache your objects to disk using key/value pairs.
    https://github.com/anupcowkur/Reservoir
37. Android-Templates-And-Utilities Collection of source codes, utilities, templates and snippets for Android development.
    https://github.com/petrnohejl/Android-Templates-And-Utilities
38. groundy Sexy way to execute async/background tasks on Android
    https://github.com/telly/groundy
39. EasyCamera Wrapper around the android Camera class that simplifies its usage
    https://github.com/Glamdring/EasyCamera
40. CastCompanionLibrary-android CastCompanionLibrary-android is a library project to enable developers integrate Cast capabilities into their applications faster and easier.
    https://github.com/googlecast/CastCompanionLibrary-android
41. cling UPnP/DLNA library for Java and Android
    https://github.com/4thline/cling
42. dspec A simple way to define and render UI specs on top of your Android UI.
    https://github.com/lucasr/dspec
43. GhostLog Android app that displays the logcat buffer in a system overlay window
    https://github.com/jgilfelt/GhostLog
44. secure-preferences Android Shared preference wrapper than encrypts the keys and values of Shared Preferences. It's not bullet proof security but rather a quick win for incrementally making your android app more secure.
    https://github.com/scottyab/secure-preferences
45. DebugLog Create a simple and more understandable Android logs.
    https://github.com/MustafaFerhan/DebugLog
46. AndroidCaldavSyncAdapater Caldav synch adapter for Android
    https://github.com/gggard/AndroidCaldavSyncAdapater
47. routable-android Routable, an in-app native URL router, for Android
    https://github.com/clayallsopp/routable-android
48. fb-android-dagger A set of helper classes for using dagger with Android components such as Applications, Activities, Fragments, BroadcastReceivers, and Services.
    https://github.com/adennie/fb-android-dagger
49. android-gesture-detectors Gesture detector framework for multitouch handling on Android, based on Android's ScaleGestureDetector
    https://github.com/Almeros/android-gesture-detectors
50. TypedPreferences Preference wrappers for primitive types for Android
    https://github.com/johnjohndoe/TypedPreferences
51. android-intents A collection of well-known Android intents for most common actions
    [https://github.com/d-tarasov/android-intents])(https://github.com/d-tarasov/android-intents)
52. android-intents A small library which will save you from writing the same intent creation code again and again for the most simple tasks
    https://github.com/marvinlabs/android-intents
53. AndroidUtils AndroidUtils
    https://github.com/pardom/AndroidUtils
54. ASimpleCache a simple cache for android and java
    https://github.com/yangfuhai/ASimpleCache
55. svg-android Fork of svg-android +SVN history +Maven +more
    https://github.com/japgolly/svg-android
56. esperandro Easy SharedPreference Engine foR ANDROid
    https://github.com/dkunzler/esperandro
57. AndroidCommons Various useful utilities for Android apps development
    https://github.com/alexvasilkov/AndroidCommons
58. greenrobot-common General purpose utilities and hash functions for Android and Java (aka java-common)
    https://github.com/greenrobot/greenrobot-common
59. puree-android Puree is a log collector for Android.
    https://github.com/cookpad/puree-android
60. hawk Secure Simple Key-Value Storage for Android
    https://github.com/orhanobut/hawk
61. ExpirableDiskLruCache Expirable Disk Lru Cache is a wrapper for DiskLruCache that allows expiring of key/value pairs by specifying evictionTimeSpan. It has very simple API.
    https://github.com/vijayrawatsan/ExpirableDiskLruCache
62. Trail A simple logging library that works in any version of Java and Android and detects the platform automatically.
    https://github.com/mauriciotogneri/trail
63. Caffeine A collection of utility classes that help make Android development faster (and safer!).
    https://github.com/percolate/caffeine
64. tray A SharedPreferences replacement for Android with multiprocess support.
    https://github.com/grandcentrix/tray
65. colorize Android quick access to 1000+ preloaded colors!
    https://github.com/cesarferreira/colorize
66. IntentBuilder Type safe intent building for services and activities
    https://github.com/emilsjolander/IntentBuilder
67. RoboGif A small utility to record Android device screen to a GIF
    https://github.com/izacus/RoboGif
68. Foredroid Utility for detecting and notifying when your Android app goes background / becomes foreground
    https://github.com/steveliles/Foredroid
69. Slinger Deep linking library for Android
    https://github.com/allegro/slinger
70. CacheUtilsLibrary A simple Android utils library to write any type of data into cache files and read them later. http://lifeofcoding.com/CacheUtilsLibrary/
    https://github.com/westlinkin/CacheUtilsLibrary
71. Foam A library to quickly and easily enable multiple monitoring & support platforms for your mobile apps.
    https://github.com/percolate/foam
72. Treasure Very easy to use wrapper library for Android SharePreferences
    https://github.com/baoyongzhang/Treasure
73. TinyPinyin Very fast lib to convert Chinese character to Pinyin. 适用于Java和Android的快速、低内存占用的汉字转拼音库。
    https://github.com/promeG/TinyPinyin
74. Ok2Curl Convert OkHttp requests into curl logs.
    https://github.com/mrmike/Ok2Curl
75. Thrifty Thrift for Android that saves you methods
    https://github.com/microsoft/thrifty
76. Android-ConfigIO A library for creating, accessing, and modifying configuration file with Xml / Json format.
    https://github.com/tzutalin/Android-ConfigIO
77. PrivacyStreams Access and process various types of personal data in Android with an easy, uniform, and privacy-friendly API. https://github.com/PrivacyStreams/PrivacyStreams

Storage

1. RealStoragePathLibrary RealStoragePathLibrary is an open source library with very minimal footprint which helps to find the real paths of the storage devices attached to the Android device.
   https://github.com/SanDisk-Open-Source/RealStoragePathLibrary
2. KotlinPreferences Kotlin Android Library, that makes preference usage simple and fun.
   https://github.com/MarcinMoskala/KotlinPreferences

SDK

1. mapbox-android-sdk Open Source Maps SDK for Android
   https://github.com/mapbox/mapbox-android-sdk
2. android-checkout Library for Android In-App Billing (Version 3)
   https://github.com/serso/android-checkout
3. WeatherLib Android Weather Library: android weather lib to develop weather based app fast and easily
   https://github.com/survivingwithandroid/WeatherLib
4. Clusterkraf A clustering library for the Google Maps Android API v2.
   https://github.com/twotoasters/clusterkraf
5. aws-sdk-android Official mirror of the AWS SDK for Android.
   https://github.com/aws/aws-sdk-android
6. evernote-sdk-android Evernote SDK for Android
   https://github.com/evernote/evernote-sdk-android
7. countly-sdk-android Countly Mobile Analytics - Android SDK
   https://github.com/Countly/countly-sdk-android
8. ANE-Facebook Air Native Extension (iOS and Android) for the Facebook mobile SDK
   https://github.com/freshplanet/ANE-Facebook
9. Office-365-SDK-for-Android Office 365 SDK for Android Preview by Microsoft Open Technologies, Inc.
   https://github.com/OfficeDev/Office-365-SDK-for-Android
10. weibo_android_sdk 新浪微博 Android SDK
    https://github.com/sinaweibosdk/weibo_android_sdk
11. socialauth-android SocialAuth repository which contains socialauth android version and samples
    https://github.com/3pillarlabs/socialauth-android
12. PayPal-Android-SDK Accept PayPal and credit cards in your Android app
    https://github.com/paypal/PayPal-Android-SDK
13. Applozic-Android-Chat-Messaging-SDK Android Chat and Messaging SDK for adding real time chat and in-app messaging into your android application
    https://github.com/AppLozic/Applozic-Android-SDK
14. barcodescanner Barcode Scanner Libraries for Android
    https://github.com/dm77/barcodescanner
15. android-donations-lib Donations Library for Android. Supports Google Play Store, Flattr, PayPal, and Bitcoin
    https://github.com/dschuermann/android-donations-lib
16. card.io-Android-SDK card.io provides fast, easy credit card scanning in mobile apps
    https://github.com/card-io/card.io-Android-SDK
17. Android-ShareEverywhere This project is the tribute to my favorite Android Widget: the Share button. Share ALL THE THINGS!
    https://github.com/dgmltn/Android-ShareEverywhere
18. android-simpl3r Amazon S3 multipart file upload for Android, made simple
    https://github.com/jgilfelt/android-simpl3r
19. poly-picker Android library project for providing multiple image selection from the device.
    https://github.com/jaydeepw/poly-picker
20. Android-ReactiveLocation Small library that wraps Google Play Service API in brilliant RxJava Observables reducing boilerplate to minimum.
    https://github.com/mcharmas/Android-ReactiveLocation
21. LandscapeVideoCamera Powerful custom Android Camera with granular control over the video quality and filesize, restricting recordings to landscape only.
    https://github.com/jmolsmobile/LandscapeVideoCamera
22. Twiiter Helper A twitter helper library that makes Twitter integration very easy and painless.
    
    https://github.com/krazykira/Twitter-Helper
23. Liquid-Android-SDK Liquid - Identify behaviours through Analytics and react with real-time Personalization.
    
    https://github.com/lqd-io/liquid-sdk-android
24. MultipleImageSelect An android library that allows selection of multiple images from gallery.
    https://github.com/darsh2/MultipleImageSelect
25. KSYMediaPlayer-Android-SDK MediaPlayer for android
    https://github.com/ks3sdk/KSYMediaPlayer-Android-SDK
26. GalleryFinal Android自定义相册，实现了拍照、图片选择（单选/多选）、 裁剪（单/多裁剪）、旋转、ImageLoader无绑定任由开发者选 择、功能可配置、主题样式可配置。GalleryFinal为你定制相册。【GalleryFinal新版正在开发中，大家有什么好的建议和想法请尽快在issues上提】
    https://github.com/pengjianbo/GalleryFinal
27. cloudrail-si-android-sdk Unified API Library for: Cloud Storage, Social Profiles, Payment, Email, SMS & POIs. Included services are Dropbox, Google Drive, OneDrive, Box, Facebook, GitHub, Google+, LinkedIn, Slack, Twitter, Windows Live, Yahoo, PayPal, Stripe, Mailjet, Sendgrid, Twilio, Nexmo, Google Places, Foursquare, Yelp. https://cloudrail.com
    https://github.com/CloudRail/cloudrail-si-android-sdk/
28. Qiscus SDK A lightweight and powerful android chat library. Qiscus SDK will allow you to easily integrating Qiscus engine with your apps to make cool chatting application.
    https://github.com/qiscus/qiscus-sdk-android

Test

1. macaca-android macaca-android
   https://github.com/macacajs/macaca-android
2. Junit A programmer-oriented testing framework for Java.
   https://github.com/junit-team/junit
3. robotium Like Selenium, but for Android
   https://github.com/RobotiumTech/robotium
4. stf Control and manage Android devices from your browser.
   https://github.com/openstf/stf
5. assertj-android A set of AssertJ helpers geared toward testing Android
   https://github.com/square/assertj-android
6. selendroid "Selenium for Android" (Test automate native or hybrid Android apps and the mobile web with Selendroid.)
   https://github.com/selendroid/selendroid
7. Cafe A powerful test framework for Android named Case Automated Framework for Everyone.
   https://github.com/BaiduQA/Cafe
8. android-junit-report A custom instrumentation test runner for Android that generates XML reports for integration with other tools.
   https://github.com/jsankey/android-junit-report
9. robolectric Android Unit Testing Framework
   https://github.com/xtremelabs/robolectric
10. powermock PowerMock is a Java framework that allows you to unit test code normally regarded as untestable.
    https://github.com/jayway/powermock
11. Green Coffee Run your Cucumber tests in your Android instrumentation tests.
    https://github.com/mauriciotogneri/green-coffee

Chart

1. Jgraph 图表控件
   https://github.com/mychoices/Jgraph
2. GraphView Android Graph Library for creating zoomable and scrollable line and bar graphs.
   https://github.com/jjoe64/GraphView
3. achartengine This is a charting software library for Android applications. Mobile phones, tablets and other gadgets running Android will probably benefit of this charting library.
   http://www.achartengine.org/
4. MPAndroidChart A simple Android chart view / graph view library, supporting line- bar- pie- and candlestick charts as well as scaling, dragging and animations.
   https://github.com/PhilJay/MPAndroidChart
5. EazeGraph An Android chart and graph library
   https://github.com/blackfizz/EazeGraph
6. AndroidCharts An easy-to-use Android charts library with animation.
   https://github.com/HackPlan/AndroidCharts
7. WilliamChart Android library to create charts.
   https://github.com/diogobernardino/WilliamChart
8. Android-Charts Open-source native Android graph/chart framework includes line chart,stick chart,candlestick chart,pie chart,spider-web chart etc.
   https://github.com/limccn/Android-Charts
9. XCL-Charts Android开源图表库(XCL-Charts is a free charting library for Android platform.)
   https://github.com/xcltapestry/XCL-Charts
10. desCharts Android Charting Library
    https://github.com/bradipao/desCharts
11. HelloCharts Charts/graphs library for Android compatible with API 8+
    https://github.com/lecho/hellocharts-android
12. HoloGraphLibrary Fork of the HoloGraphLibrary by Daniel Nadeau with additionnal features
    https://github.com/Androguide/HoloGraphLibrary
13. NumAndroidCharts A powerful opensource android charting library
    https://github.com/numetriclabz/numAndroidCharts

Icons

1. Skycons Forecast / DarkSky's Skycons, Animated Weather icons recreated for Android
   https://github.com/torryharris/Skycons
2. droidicon Over 1600 customizable icons for Android including 750+ Google Material Design icons, 25 ready-made social badges, and more!
   https://github.com/theDazzler/droidicon
3. Android-Iconics Android-Iconics is a library to use (almost) any alternative iconfont in your projects. It allows you to add any Android-Iconics compatible typeface-library-addon to your project and you are able to start using that font.
   https://github.com/mikepenz/Android-Iconics
4. android-material-icons Easy to use material icons for Android
   https://github.com/Malinskiy/android-material-icons
5. androidicons Androidicons is a professional, handcrafted icon set with 250 icons in 14 different colors and 5 sizes, including an icon font and all sources.
   https://github.com/opoloo/androidicons
6. Android-Iconics Android-Iconics - Use any icon font, or vector (.svg) as drawable in your application. http://mikepenz.github.io/Android-Iconics
   https://github.com/mikepenz/Android-Iconics

Colors

1. Android-Material-Design-Colors Android Material Design Colors
   https://github.com/wada811/Android-Material-Design-Colors

Font

1. Calligraphy Custom fonts in Android the easy way...
   https://github.com/chrisjenx/Calligraphy
2. android-typeface-helper Typeface helper for Android
   https://github.com/norbsoft/android-typeface-helper
3. Android-Icon-Fonts Material and Holo iconic fonts.
   https://github.com/johnkil/Android-Icon-Fonts
4. Print A lightweight Android library for use iconic fonts.
   https://github.com/johnkil/Print/
5. TypefaceHelper Helper object for injecting typeface into various text views of android.
   https://github.com/Drivemode/TypefaceHelper
6. AndroidFontsManager 字体管理器，方便快速的为应用内所有组件更换字体。
   https://github.com/GcsSloop/AndroidFontsManager
7. fontbinding Easy custom fonts in XML using data binding.
   https://github.com/lisawray/fontbinding
8. DroidAwesome An android library to display FontAwesome Icons in any View or a MenuItem.
   https://github.com/Livin21/DroidAwesome
9. FontometricsLibrary Android Library to use custom fonts with ease.
   https://github.com/Ishmeetsingh97/FontometricsLibrary

OpenGL

1. Rajawali Rajawali is a 3D engine for Android based on OpenGL ES 2.0/3.0. It can be used for normal apps as well as live wallpapers.
   https://github.com/MasDennis/Rajawali

Debug

1. android-grid-wichterle This app will show grid overlay over whole system which helps you to verify your excellent app design.
   https://github.com/inmite/android-grid-wichterle
2. Goreinu Goreinu allows to copy application files on sdcard.
   https://github.com/kgmyshin/Goreinu
3. Android Debug Database It's is a powerful library for debugging databases and shared preferences in Android applications. https://github.com/amitshekhariitbhu/Android-Debug-Database
4. Under the Hood A flexible and powerful Android debug view library. It uses a modular template system that can be easily extended
   https://github.com/patrickfav/under-the-hood
5. Uber-Adb-Tools A tool that enables advanced features through adb installing and uninstalling apps like wildcards and multi device support.
   https://github.com/patrickfav/uber-adb-tools

Demo

1. android-animated-menu-items The example Android project of animated menu items in toolbar
   https://github.com/adonixis/android-animated-menu-items
2. Android-AOPExample This is a simple example of Aspect Oriented Programming in Android
   https://github.com/android10/Android-AOPExample
3. AndroidStudyDemo AndroidStudyDemo 为Android学习项目，将学习Android的过程中的收获都汇集于此。要求执行严格的编码规范。
   https://github.com/DIY-green/AndroidStudyDemo
4. MovieGuide An Android app that showcases the MVP pattern, Clean Architecture and RxJava
   https://github.com/esoxjem/MovieGuide
5. Android-ItemTouchHelper-Demo Basic example of using ItemTouchHelper to add drag & drop and swipe-to-dismiss to RecyclerView.
   https://github.com/iPaulPro/Android-ItemTouchHelper-Demo
6. Android-Material-Examples Little bites of Material Design
   https://github.com/saulmm/Android-Material-Examples
7. android-support-23.2-sample Sample Project for Android Support Library 23.2 http://android-developers.blogspot.com/2016/02/android-support-library-232.html
   https://github.com/liaohuqiu/android-support-23.2-sample
8. PhotoEditDemo 图片处理sdk(just for eclipse)
   https://github.com/jarlen/PhotoEditDemo
9. CardSlidePanel Based on https://github.com/xmuSistone/android-card-slide-panel.git
   https://github.com/taoliuh/CardSlidePanel
10. android-demos Examples of Android applications
    https://github.com/novoda/android-demos
11. u2020 A sample Android app which showcases advanced usage of Dagger among other open source libraries.
    https://github.com/JakeWharton/u2020
12. BlurEffectForAndroidDesign Sample to show how to implement blur graphical tricks
    https://github.com/PomepuyN/BlurEffectForAndroidDesign
13. maven-android-plugin-samples Usage examples for Android Maven Plugin
    https://github.com/jayway/maven-android-plugin-samples
14. Android-WizardPager Android pager-style wizard flow sample code
    https://github.com/romannurik/Android-WizardPager
15. AndroidPushNotificationsDemo A example of an android app that receives push notifications using MQTT.
    https://github.com/tokudu/AndroidPushNotificationsDemo
16. android-basic-samples Google Play game services - Android samples
    https://github.com/playgameservices/android-basic-samples
17. RobolectricSample Sample project demonstrating use of the Robolectric Android testing project
    https://github.com/robolectric/RobolectricSample
18. android-demo Android common lib demo, include ImageCache, HttpCache, DropDownListView, DownloadManager, install apk silent and so on, you can find description
    https://github.com/Trinea/android-demo
19. android-movies-demo Sample application demonstrating Android design and animation
    https://github.com/dlew/android-movies-demo
20. maven-android-plugin-samples Usage examples for Android Maven Plugin
    https://github.com/jayway/maven-android-plugin-samples
21. android-http-examples Sample code for HTTP on Android.
    https://github.com/swankjesse/android-http-examples
22. ProgrammingAndroidExamples This repo contains example code for O'Reilly's "Programming Android" by Zigured Mednieks, Laird Dornin, Blake Meike and Masumi Nakamura
    https://github.com/bmeike/ProgrammingAndroidExamples
23. android-layout-samples Explorations around Android custom layouts
    https://github.com/lucasr/android-layout-samples
24. LearningAndroidYamba This is the code that goes along with Learning Android book.
    https://github.com/twitter-university/LearningAndroidYamba
25. RoboDemo RoboDemo is a ShowCase library for Android to demonstrate to users how a given Activity works.
    https://github.com/stephanenicolas/RoboDemo
26. ProgrammingAndroid2Examples This repo contains example code for O'Reilly's "Programming Android" by Zigured Mednieks, Laird Dornin, Blake Meike and Masumi Nakamura
    https://github.com/bmeike/ProgrammingAndroid2Examples
27. hellomap-android Quick start with the Google Maps Android API
    https://github.com/googlemaps/hellomap-android
28. GraphView-Demos Examples for my Android GraphView library
    https://github.com/jjoe64/GraphView-Demos
29. Android-Volley-Example Android volley library examples
    https://github.com/PareshMayani/Android-Volley-Example
30. android-demos Google Drive Android API Demos
    https://github.com/googledrive/android-demos
31. AndroidDemoProjects Collection of Small Android Projects
    https://github.com/PaulTR/AndroidDemoProjects
32. android-ActivitySceneTransition Demonstrates how to the use Activity scene transitions when transitions from one Activity to another. Uses a combination of moveImage and changeBounds to nicely transition a grid of images to an Activity with a large image and detail text.
    https://github.com/googlesamples/android-ActivitySceneTransition
33. android_L_preview_example This project is focused on the sample using the API's new preview version of Android-L, use of transitions, shadows etc...
    https://github.com/saulmm/android_L_preview_example
34. googletv-android-samples Source for many GoogleTV Example applications.
    https://github.com/google/googletv-android-samples
35. Android-RxJava Learning RxJava for Android by example
    https://github.com/kaushikgopal/Android-RxJava
36. Android-LollipopShowcase A simple app to showcase some of the cool new cool stuff in Android L. RecyclerView, CardView, ActionBarDrawerToggle, DrawerLayout, Animations, Android Compat Design, Toolbar
    https://github.com/mikepenz/Android-LollipopShowcase
37. QuickNews This is a news client, similar to netease, news headlines
    https://github.com/tigerguixh/QuickNews
38. android-best-practices Do's and Don'ts for Android development, by Futurice developers
    https://github.com/futurice/android-best-practices
39. ToolbarMenudrawer Quick example for the new Toolbar (and Menudrawer) API. Thanks for starring / forking me. :')
    https://github.com/I-am-Reinvented/ToolbarMenudrawer
40. Android-PullLayout 仿UC天气下拉和微信下拉眼睛
    https://github.com/BlueMor/Android-PullLayout
41. DragLayout An Android Project.ViewDragHelper.QQ.QQ5.0.侧滑
    https://github.com/BlueMor/DragLayout
42. rx-android-architecture An example project of an Android architecture built on RxJava
    https://github.com/tehmou/rx-android-architecture
43. AndroidCoolDragAndDropGridView An example of a gridview with various column span items and drag and drop support like Google keep has
    https://github.com/theredsunrise/AndroidCoolDragAndDropGridView
44. Demo-GoogleBook-Android An android demo about searching and displaying books details using Google book api.
    https://github.com/Jungerr/Demo-GoogleBook-Android
45. Demo-YouTuBe-Android An android demo about searching and playing youtube videos with youtube player or videoview.
    https://github.com/Jungerr/Demo-YouTuBe-Android
46. android-proguard-snippets Proguard configurations for common Android libraries
    https://github.com/krschultz/android-proguard-snippets
47. ViewPagerHeaderScrollDemo ViewPagerHeaderScrollDemo
    https://github.com/ongakuer/ViewPagerHeaderScrollDemo
    1. Quality-Tools-for-Android This is an Android sample app + tests that will be used to work on various project to increase the quality of the Android platform.
       https://github.com/stephanenicolas/Quality-Tools-for-Android
48. socket.io-android-chat A simple chat demo for socket.io and Android
    https://github.com/nkzawa/socket.io-android-chat
49. AndroidTVExplorer A sample project which can be used as a base in order to develop Media Library applications for Android TV. Follow the series of blogs starting at http://www.malmstein.com/blog/2014/10/21/building-applications-for-android-tv/ in order to keep up to date with the process
    https://github.com/malmstein/AndroidTVExplorer
50. Android-Notification-Example A simple sample showing the different types of notifications on Andoid
    https://github.com/saulmm/Android-Notification-Example
51. androidmvp MVP Android Example used to explain how to use this pattern in our Android apps. This code was created to support an article explanation.
    https://github.com/antoniolg/androidmvp
52. PlayPauseDrawable This is a sample Play & Pause Drawable with morphing animation for Android
    https://github.com/tarek360/PlayPauseDrawable
53. u2020-mvp Port of Jake Wharton's U2020 sample app with use of MVP and Dagger 2
    https://github.com/LiveTyping/u2020-mvp
54. Material-Animation-Samples In this repository i will add more of samples in material animation
    https://github.com/tarek360/Material-Animation-Samples
55. MaterialTransitions Sample material transition animations for Android
    https://github.com/toddway/MaterialTransitions
56. Watch A project which demonstrate how to develop a custom client on android for drbbble.com
    https://github.com/tuesda/Watch
57. MaterialDesignExample 本APP用来演示Material Design控件的使用。 http://www.aswifter.com/2015/07/02/Material-Design-Example-5/
    https://github.com/chenyangcun/MaterialDesignExample
58. MaterialPowerMenu A demo of the power menu with Reveal and other animations
    https://github.com/naman14/MaterialPowerMenu
59. UI-Motion How to apply meaningful and delightful motion in a sample Android app.
    https://github.com/andremion/UI-Motion
60. MaterialLogin Amazing Material Login effect
    https://github.com/fanrunqi/MaterialLogin
61. AndroidShortcuts Example app for shortcuts in design library v25
    https://github.com/pcevikogullari/AndroidShortcuts

App

1. MusicStreamer A Music Player for android that renders beautiful DNA(Visualization) of the currently playing music.
   https://github.com/harjot-oberai/MusicStreamer
2. remusic 仿网易云音乐 安卓版，netease android，音乐播放器 在线 下载
   https://github.com/aa112901/remusic
3. Ghost 微影，一款纯粹的在线视频App，基于Material Design + MVP + RxJava + Retrofit + Realm + Glide
   https://github.com/GeekGhost/Ghost
4. banya An open resource for Douban API with NETEASY Music's UI.
   https://github.com/forezp/banya
5. BookReader 任阅小说阅读器。实现追书推荐、标签检索、3D仿真翻页效果、文章阅读、缓存章节、日夜间模式、文本朗读等功能。
   https://github.com/JustWayward/BookReader
6. bookdash-android-app Book Dash is an Android App for the NPO where you can download books in different languages for free.
   https://github.com/bookdash/bookdash-android-app
7. Bourbon An MVP Dribbble client for Android Mobile, Tablet, Wear and TV.
   https://github.com/hitherejoe/Bourbon
8. BlackLight A light Sina Weibo client for Android https://black.lighting
   https://github.com/PaperAirplane-Dev-Team/BlackLight
9. gitbook-android An android app to read gitbook in the offline mode.
   https://github.com/snowdream/gitbook-android
10. DMPlayer DMPLayer is an Android music player prototype
    https://github.com/dibakarece/DMPlayer
11. ForkHub Fork of the GitHub Android App https://play.google.com/store/apps/details?id=jp.forkhub
    https://github.com/jonan/ForkHub
12. MaterialAudiobookPlayer Audiobook Player for Android
    https://github.com/PaulWoitaschek/MaterialAudiobookPlayer
13. Bandhook-Kotlin A showcase music app for Android entirely written using Kotlin language
    https://github.com/antoniolg/Bandhook-Kotlin
14. LeeCo LeeCo is an awesome app for (including unlock) problems, solutions, discuss(from leetcode) and comments.
    https://github.com/Nightonke/LeeCo
15. MaterialDesignColorPalette This is a dev tool to visualize the colours of Material design defined on http://www.google.com/design/spec/style/color.html#color-ui-color-palette
    https://github.com/HozakaN/MaterialDesignColorPalette
16. PoiShuhui-Kotlin 一个用Kotlin写的简单漫画APP
    https://github.com/wuapnjie/PoiShuhui-Kotlin
17. AndroidReview AndroidReview (Android面试复习)
    https://github.com/envyfan/AndroidReview
18. 2048-android The android port of the 2048 game (for offline playing)
    https://github.com/uberspot/2048-android
19. FeedEx FeedEx News Reader is a light and modern Android feed reader, based on Sparse rss.
    https://github.com/HoloAddict/FeedEx
20. rubychina4android Ruby-China的Android客户端
    https://github.com/gonjay/rubychina4android
21. HackerNews An open source Hacker News client for Android.
    https://github.com/bishopmatthew/HackerNews
22. News-Android-App ownCloud News Reader - Android App
    https://github.com/owncloud/News-Android-App
23. android-delicious Delicious Android is an Android app which helps you access and save bookmarks via Delicious. It's available over at Google Play.
    https://github.com/lexs/android-delicious
24. droidplanner Ground Control Station for Android Devices
    https://github.com/DroidPlanner/droidplanner
25. FoldingNavigationDrawer-Android This is a sample project present how to use Folding-Android to add Folding Efect to Navigation Drawer.
    https://github.com/tibi1712/FoldingNavigationDrawer-Android
26. play-android Stream music and control the queue of a play server from your Android device.
    https://github.com/play/play-android
27. vanilla Vanilla Music Player for Android (abandoned)
    https://github.com/kreed/vanilla
28. OpenFlappyBird An open source clone of a famous flappy bird game for Android using AndEngine
    https://github.com/deano2390/OpenFlappyBird
29. TurtlePlayer A Free, Fully Fledged, Open-Source Music Player for Android
    https://github.com/eddturtle/TurtlePlayer
30. seadroid Android client for Seafile
    https://github.com/haiwen/seadroid
31. freegemas-gdx Freegemas libGDX is an Android and Java desktop port of Freegemas, which in turn is an open source version of the well known Bejeweled.
    https://github.com/siondream/freegemas-gdx
32. kanxue-android-app 看雪安全论坛 Android 客户端
    https://github.com/kanxue-team/kanxue-android-app
33. FlappyCow Android game in "Flappy Bird" Style
    https://github.com/cubei/FlappyCow 1.wakao-app 哇靠百科 － 一款聚合了众多笑话段子、妹子图、微信公众号文章的Android App。
    https://github.com/yongbo000/wakao-app
34. Twidere-Android Twidere is a powerful twitter client for Android 1.6+ 1 , which gives you a full Holo experience and nearly full Twitter's feature.
    https://github.com/TwidereProject/Twidere-Android
35. Telecine Record full-resolution video on your Android devices.
    https://github.com/JakeWharton/Telecine
36. TopNews 高仿“今日头条”客户端，实现它大部分的功能，练习之作，目的了解怎么发开一个新闻类客户端，从涉及的相关知识点中提升自我水平。
    https://github.com/Rano1/TopNews
37. WaniKani-for-Android An Android client application for the awesome kanji learning website wanikani.comhttps://github.com/xiprox/WaniKani-for-Android
38. OpenLibra-Material OpenLibra client on Material Design
    https://github.com/saulmm/OpenLibra-Material
39. superCleanMaster 一键清理 开源版，包括内存加速，缓存清理，自启管理，软件管理等。
    https://github.com/joyoyao/superCleanMaster
40. XhsWelcomeAnim 小红书欢迎引导第二版
    https://github.com/w446108264/XhsWelcomeAnim
41. palettehelper Utility Android app for generating color palettes of images using the Palette library. Written in Kotlin.
    https://github.com/hzsweers/palettehelper
42. OpenImgur Open source Imgur Android App
    https://github.com/Kennyc1012/OpenImgur
43. WordPress-Android WordPress for Android
    https://github.com/wordpress-mobile/WordPress-Android
44. sgtpuzzles a port of Simon Tatham's Portable Puzzle Collection, a collection of 36 single-player logic games.
    https://github.com/chrisboyle/sgtpuzzles
45. keepassdroid a free, open source, light-weight and easy-to-use password manager app.
    https://github.com/bpellin/keepassdroid
46. Banjen Open source brazilian banjo tunner, example to play local sounds.
    https://github.com/MakinGiants/android_banjo_tuner
47. LiveView Funny LiveView app that play sounds in the phone from the watch.
    https://github.com/MakinGiants/LiveView-Funny-Plugin
48. LiveView Answer-it LiveView app that send sms to call history contacts.
    https://github.com/MakinGiants/LiveView-Answer-it
49. LiveView Tell-it LiveView app that send default sms to favorite contacts.
    https://github.com/MakinGiants/LiveView-Tell-it
50. Piclice A practical tool which helps users to slice and share their pictures.
    https://github.com/yaa110/Piclice
51. FlyRefresh The Android implementation of Replace, designed by Zee Youn. I implement this as a FlyRefresh layout. The content of the layout can be any view, such as a ListView, RecyclerView, ScrollView, etc.
    https://github.com/race604/FlyRefresh
52. InstaMaterial Implementation of Instagram with Material Design (originally based on Emmanuel Pacamalan's concept)
    https://github.com/frogermcs/InstaMaterial
53. wechat A High Copy WeChat ,SNS APP (高仿微信)
    https://github.com/motianhuo/wechat
54. MaterialUp MaterialUp Android App
    https://github.com/jariz/MaterialUp
55. Android-Jigsaw-Puzzle This is an Android app where a user draws something and use it to generate and solve jigsaw puzzles of various difficulties (easy, medium, hard). I have been slowly adding features and plan to complete it at some point.
    https://github.com/julesbond007/Android-Jigsaw-Puzzle
56. AmazeFileManager Amaze File Manager source code
    https://github.com/arpitkh96/AmazeFileManager
57. SimplifyReader 一款基于Google Material Design设计开发的Android客户端，包括新闻简读，图片浏览，视频爽看 ，音乐轻听以及二维码扫描五个子模块。
    https://github.com/SkillCollege/SimplifyReader
58. clean-status-bar Tidy up your Android status bar before taking screenshots for the Play Store
    https://github.com/emmaguy/clean-status-bar
59. Etar Calendar OpenSource calendar with Material Design
    https://github.com/xsoh/Etar-Calendar
60. HomeMirror Android application powering the mirror in my house
    https://github.com/HannahMitt/HomeMirror
61. JNote 一款支持部分Markdown语法的轻量级便签软件。
    https://github.com/Jhuster/JNote
62. TextSecure TextSecure is a messaging app for simple private communication with friends.
    https://github.com/WhisperSystems/TextSecure
63. jianshi A beautiful app 简诗 for recording anything in your life with traditional Chinese style.
    https://github.com/wingjay/jianshi
64. shuba Find the best novel for users.
    https://github.com/liuguangqiang/shuba
65. MousePaint MousePaint client (not official release). 鼠绘漫画客户端（非官方）
    https://github.com/android-cjj/MousePaint
66. Lightning Browser A speedy, lightweight browser with modern navigation.
    https://github.com/anthonycr/Lightning-Browser
67. Leisure Leisure is an Android App containing Zhihu Daily,Guokr Scientific,XinhuaNet News and Douban Books
    https://github.com/MummyDing/Leisure
68. ZhihuDaily 壁上观，A material design android app to show zhihu daily
    https://github.com/Tneciv/ZhihuDaily
69. OuNews 简单的新闻客户端
    https://github.com/oubowu/OuNews
70. TranslateApp 一个实现『划词翻译』功能的 Android 应用 ，可能是目前 Android 市场上翻译效率最高的一款应用。
    https://github.com/maoruibin/TranslateApp
71. uhabits Android app that helps you create and maintain good habits
    https://github.com/iSoron/uhabits
72. AisenWeiBo 新浪微博第三方Android客户端
    https://github.com/wangdan/AisenWeiBo
73. Awesome Campus Awesome Campus is Jiangxi Normal University's Android App
    https://github.com/MummyDing/Awesome-Campus
74. MicroReader 一个小而美的阅读客户端
    https://github.com/YiuChoi/MicroReader
75. material-intro A simple material design app intro with cool animations and a simple API.
    https://github.com/HeinrichReimer/material-intro
76. MarkdownEditors Android Markdown编辑器
    https://github.com/qinci/MarkdownEditors
77. Android-SecretCodes Secret Codes is an Open Source application that allows you to browse through hidden codes of your Android phone. http://simonmarquis.github.io/Android-SecretCodes/
    https://github.com/SimonMarquis/Android-SecretCodes
78. Music-Player From UI Proposal to Code
    https://github.com/andremion/Music-Player
79. Villains-and-Heroes Android app built with MVP architectural approach and uses Marvel Comics API that allows developers everywhere to access information about Marvel's vast library of comics
    https://github.com/andremion/Villains-and-Heroes
80. likequanmintv 基于MVP的Retrofit2(okhttp3)+rxjava+dagger2+greendao+glide+rtmp直播。该项目系仿全民TV,属于独立开发者作品,仅供参考学习，拒绝做一切商业用途，如有侵权，请告知删除。https://github.com/a371166028/likequanmintv
81. JianDou 豆瓣Material design风格的客户端 https://github.com/ChinaLHR/JianDou

Security

1. gnupg-for-android A port of gnupg to Android
   https://github.com/guardianproject/gnupg-for-android
2. openssl-android a version of the official Android openssl setup to build standalone for use in app
   https://github.com/guardianproject/openssl-android
3. apg OpenPGP for Android
   https://github.com/thialfihar/apg
4. android-grid-wichterle This app will show grid overlay over whole system which helps you to verify your excellent app design.
   https://github.com/inmite/android-grid-wichterle
5. tweetnacl-java This is TweetNacl security library written in Java for Android.
   https://github.com/InstantWebP2P/tweetnacl-java
6. AESCrypt-Android Simple API to perform AES encryption on Android. This is the Android counterpart to the AESCrypt library Ruby and Obj-C (with the same less than ideal security defaults) created by Gurpartap Singh. https://github.com/Gurpartap/aescrypt
   https://github.com/scottyab/AESCrypt-Android
7. FolioReader-Android A Java ePub reader and parser framework for Android.
   https://github.com/FolioReader/FolioReader-Android

Tools

1. debug-bottle