Trinea/android-open-project

Android Open Source Projects https://codekk.com for more

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Welcome to recommend good android open source projects, you can Commit directly or tell me at Colloct Page. Welcome Star and Fork

Dev Tools App

The Dev Tools App is a powerful android development tool that can help you improve efficiency greatly, It can be used to view the latest open source projects, view activity history, view manifest, decompile, color picker, extract apk or so, view app info, open or close the options in the developer options quickly, and more.

You can download it from DevTools@Google Play.

Twitter：trinea_cn    HomePage: codekk.com    Email：[email protected]
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Include：

1. Personalized Views
   include ListView, ActionBar, Menu, ViewPager, Gallery, ImageView, ProgressBar, TextView, ScrollView, TimeView, TipView, FlipView, ColorPickView, GraphView, UI Style, Others
2. Common Util Libs
  include Dependency Injection, ImageCache, Network, Database ORM, Android common lib, Compatible low version, Multimedia, Event Bus, Sensor, Security, Maps, Plug-in, File, Others
3. Excellent projects
  more interesting android project
4. Development and testing tools
  include Development productivity tools, Develop self-test related, Testing tools, Development and build environment, Others
5. Outstanding individuals and groups
  Willing to share and have some very good open source project Individual and Group，include JakeWharton, Chris Banes, Koushik Dutta and so on

Thank likebamoo vmlinz xalexchen youxiachai stormzhang

1. Personalized Views

Customed View. include ListView, ActionBar, Menu, ViewPager, Gallery, GridView, ImageView, ProgressBar, Dialog, Toast, EditText, TableView, Activity Animation and so on。

1. ListView

1. android-pulltorefresh
   Provides a reusable Pull to Refresh widget for Android, support ListView, ExpandableListView, GridView, WebView, ScrollView, HorizontalScrollView, ViewPager, support pulling Down from the top, and Pulling Up from the bottom and so on.
   Project Address: https://github.com/chrisbanes/Android-PullToRefresh
   Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/pull-to-refreshview-demo.apk?raw=true
   Similar App: Sina Weibo Pages

2. android-pulltorefresh-listview
   Pull to refresh listView for android, There is some bug for this.
   Project Address: https://github.com/johannilsson/android-pulltorefresh
   Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/pull-to-refresh-listview-demo.apk?raw=true

3. android-Ultra-Pull-to-Refresh
   It's a replacement for the deprecated pull to refresh solution. It can contain any view you want. It's easy to use and more powerful than SwipeRefreshLayout. It's well designed, you can customize the UI effect you want as easy as adding a headview to ListView. Support API LEVEL >= 8 Project Address: https://github.com/liaohuqiu/android-Ultra-Pull-To-Refresh
   Demo Apk: https://github.com/liaohuqiu/android-Ultra-Pull-To-Refresh/blob/master/ptr-demo/target/ultra-ptr-demo.apk?raw=true

1. DropDownListView
   Pull to refresh and load more when on bottom listView for android. Project Address: https://github.com/Trinea/AndroidCommon
   Demo Apk: https://play.google.com/store/apps/details?id=cn.trinea.android.demo
   Document: https://www.trinea.cn/android/dropdown-to-refresh-and-bottom-load-more-listview/

2. DragSortListView
   Android ListView with drag and drop reordering.
   Project Address: https://github.com/bauerca/drag-sort-listview
   Demo Apk: https://play.google.com/store/apps/details?id=com.mobeta.android.demodslv
   Similar App: Wordpress Android

3. SwipeListView
   An Android List View implementation with support for drawable cells and many other swipe related features. Project Address: https://github.com/47deg/android-swipelistview
   Demo Apk: https://play.google.com/store/apps/details?id=com.fortysevendeg.android.swipelistview
   Similar App: 微信

4. SlideAndDragListView
   An extension of the Android ListView that enables slide and drag-and-drop reordering of list items.
   Project Address: https://github.com/yydcdut/SlideAndDragListView
   Demo Apk: https://github.com/yydcdut/SlideAndDragListView/blob/master/apk/sdlv.apk?raw=true
   Similar App: Android 手机QQ 5.0
   Renderings:

5. RecyclerViewSwipeDismiss lightweight support-v7 RecyclerView Swipe to dismiss library，Just bind onTouchListener Project Address：https://github.com/CodeFalling/RecyclerViewSwipeDismiss Renderings:

6. Android-SwipeToDismiss Android swipe to dismiss listView. Project Address: https://github.com/romannurik/Android-SwipeToDismiss
   Demo Apk: https://github.com/JakeWharton/SwipeToDismissNOA/SwipeToDismissNOA.apk/qr_code

7. StickyListHeaders
   An android library for section headers of listView that stick to the top. Project Address: https://github.com/emilsjolander/StickyListHeaders
   Similar App: Contacts app of Android 4.0 Ice Cream Sandwich
   Renderings:

8. pinned-section-listview
   Easy to use ListView with pinned sections for Android. Pinned section is a header view which sticks to the top of the list until at least one item of that section is visible.
   Project Address: https://github.com/beworker/pinned-section-listview
   Renderings:

9. PinnedHeaderListView
   A ListView with pinned section headers for Android. Project Address: https://github.com/JimiSmith/PinnedHeaderListView

10. QuickReturnHeader
    A ListView/ScrollView header that hides when scrolling down and reappears immediately when scrolling up, regardless of how far down the list we've gone.
    Project Address: https://github.com/ManuelPeinado/QuickReturnHeader
    Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/quick-return-header-demo.apk?raw=true
    Similar App: google plus

11. IndexableListView
    iPhone like fast scroll ListView on Android with non-alphabetic overlays. Project Address: https://github.com/woozzu/IndexableListView
    Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/indexable-listview.apk?raw=true
    Similar App: Weichat contact

12. CustomFastScrollView
    A FastScrollView with non-alphabetic overlays.
    Project Address: https://github.com/nolanlawson/CustomFastScrollViewDemo
    Renderings:

13. Android-ScrollBarPanel
    Android-ScrollBarPanel allows to attach a View to a scroll indicator like it's done in Path 2.0
    Project Address: https://github.com/rno/Android-ScrollBarPanel
    Renderings:

14. SlideExpandableListView
    A better ExpandableListView, with animated expandable views for each list item.
    Project Address: https://github.com/tjerkw/Android-SlideExpandableListView
    Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/slide-expandable-listView-demo.apk?raw=true

15. JazzyListView
    JazzyListView is an extension of ListView designed to animate list item views as they become visible. There are a number of pre-built, bundled effects that can be used by setting the effect in code or an XML layout attribute, like grow, cards, curl, wave, flip, fly. Also, it is possible to use a custom effect by implementing a JazzyEffect.
    Project Address: https://github.com/twotoasters/JazzyListView
    Demo Apk: https://play.google.com/store/apps/details?id=com.twotoasters.jazzylistview.sample

16. ListViewAnimations
    An Android library which allows developers to easily add animations to ListView items.
    Project Address: https://github.com/nhaarman/ListViewAnimations
    Demo Apk: https://play.google.com/store/apps/details?id=com.haarman.listviewanimations
    Similar App: Google plus, Google Now, Ultimate, Light Flow Lite, TreinVerkeer, Running Coach, Pearl Jam Lyrics, Calorie Chart, Car Hire, Super BART, DK FlashCards, Counter Plus, Voorlees Verhaaltjes 2.0

17. DevsmartLib-Android
    A Horizontal ListView for Android. Project Address: https://github.com/dinocore1/DevsmartLib-Android
    Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/horizontal-listview-demo.apk?raw=true

18. HorizontalVariableListView
    Horizontal list view for Android which allows variable items widths.
    Project Address: https://github.com/sephiroth74/HorizontalVariableListView

19. LinearListView
    Android library that allows you to bind a LinearLayout with a ListAdapter.
    Project Address: https://github.com/frankiesardo/LinearListView

20. MultiChoiceAdapter
    A ListView adapter with support for multiple choice modal selection. Project Address: https://github.com/ManuelPeinado/MultiChoiceAdapter
    Demo Apk: https://play.google.com/store/apps/details?id=com.manuelpeinado.multichoiceadapter.demo

21. EnhancedListView
    An Android ListView with enhanced functionality (e.g. Swipe To Dismiss and Undo)
    Project Address: https://github.com/timroes/EnhancedListView
    Demo Apk: https://play.google.com/store/apps/details?id=de.timroes.android.listviewdemo&rdid=de.timroes.android.listviewdemo

22. ListBuddies
    Android library of a pair of auto-scroll circular parallax ListViews like the ones on the expedia app home page.
    Project Address: https://github.com/jpardogo/ListBuddies
    Demo Apk: https://play.google.com/store/apps/details?id=com.jpardogo.android.listbuddies
    Renderings:
    

23. RecyclerItemDecoration
    RecyclerItemDecoration allows you to draw divider between items in recyclerview with multiple ViewType without considering items' positions! You don't need to think about items' position! You need to care about their ViewType!!
    Project Address: https://github.com/magiepooh/RecyclerItemDecoration
    Renderings:

2. ActionBar

1. ActionBarSherlock
   Action bar implementation which uses the native action bar on Android 4.0+ and a custom implementation on pre-4.0 through a single API and theme.
   Project Address: https://github.com/JakeWharton/ActionBarSherlock
   Demo Apk: https://play.google.com/store/apps/details?id=com.actionbarsherlock.sample.demos

2. ActionBar-PullToRefresh
   ActionBar-PullToRefresh provides an easy way to add a modern version of the pull-to-refresh interaction to your application.
   Project Address: https://github.com/chrisbanes/ActionBar-PullToRefresh
   Demo Apk: https://play.google.com/store/apps/details?id=uk.co.senab.actionbarpulltorefresh.samples.stock
   Similar App: Gmail，Google plus

3. FadingActionBar
   Android library implementing a fading effect for the action bar, similar to the one found in the Play Music app.
   Project Address: https://github.com/ManuelPeinado/FadingActionBar
   Demo Apk: https://play.google.com/store/apps/details?id=com.manuelpeinado.fadingactionbar.demo
   Similar App: google music

4. NotBoringActionBar
   Auto dismiss actionbar when content scroll down. Project Address: https://github.com/flavienlaurent/NotBoringActionBar
   Demo Apk: http://flavienlaurent.com/blog/2013/11/20/making-your-action-bar-not-boring/
   Similar App: google music

5. RefreshActionItem
   An action bar item which acts both as a refresh button and as a progress indicator.
   Project Address: https://github.com/ManuelPeinado/RefreshActionItem
   Demo Apk: https://play.google.com/store/apps/details?id=com.manuelpeinado.refreshactionitem.demo
   Similar App: The New York Times，DevAppsDirect.

6. GlassActionBar
   An Android library which implements a glass-like effect for the action bar.
   Project Address: https://github.com/ManuelPeinado/GlassActionBar
   Demo Apk: https://play.google.com/store/apps/details?id=com.manuelpeinado.glassactionbardemo
   Similar App: google music
   

3. Menu

1. MenuDrawer
   A slide-out menu implementation, which allows users to navigate between views in your app. Most commonly the menu is revealed by either dragging the edge of the screen, or clicking the 'up' button in the action bar. It support content below or up to menu when compare to SlidingMenu.
   Project Address: https://github.com/SimonVT/android-menudrawer
   Demo Apk: http://simonvt.github.io/android-menudrawer/
   Similar App: Gmail, Google Music

2. SlidingMenu
   An Android library that allows you to easily create applications with slide-in menus. It support animation when compare to MenuDrawer.
   Project Address: https://github.com/jfeinstein10/SlidingMenu
   Demo Apk: https://play.google.com/store/apps/details?id=com.slidingmenu.example
   Similar App: Foursquare, LinkedIn, Zappos, Rdio, Evernote Food, Plume, VLC for Android, ESPN ScoreCenter, MLS MatchDay, 9GAG, Wunderlist 2, The Verge, MTG Familiar, Mantano Reader, Falcon Pro (BETA), MW3 Barracks

3. ArcMenu
   An android custom view which looks like the menu in Path 2.0 for iOS.
   Project Address: https://github.com/daCapricorn/ArcMenu
   Similar App: Path
   Renderings:

4. android-satellite-menu
   Android Satellite Menu.
   Project Address: https://github.com/siyamed/android-satellite-menu
   Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/satellite-menu-demo.apk?raw=true
   Similar App: Path

5. radial-menu-widget
   A radial (pie) menu for Android.
   Project Address: https://code.google.com/p/radial-menu-widget/
   Renderings: http://farm8.staticflickr.com/7377/11621125154_d1773c2dcc_o.jpg

6. Android Wheel Menu
   Circular menu widget for Android.
   Project Address: https://github.com/anupcowkur/Android-Wheel-Menu
   Renderings:

7. FoldingNavigationDrawer
   Folding navigation drawer for android.
   Project Address: https://github.com/tibi1712/FoldingNavigationDrawer-Android
   Demo Apk: https://play.google.com/store/apps/details?id=com.ptr.folding.sample
   Renderings:

8. AndroidResideMenu
   The idea of ResideMenu is from Dribbble 1 and 2 likes iOS ResideMenu.
   Project Address: https://github.com/SpecialCyCi/AndroidResideMenu
   Renderings:

9. FloatingActionMenu-Animation
   Extended FloatingActionMenu lib, with custom menu icon, animation when scrolling. Project Address: https://github.com/toanvc/FloatingActionMenu-Animation
   Renderings:
   

4. ViewPager Gallery

1. Android-ViewPagerIndicator
   Paging indicator widgets compatible with the ViewPager from the Android Support Library and ActionBarSherlock. Originally based on Patrik Åkerfeldt's ViewFlow.
   Project Address: https://github.com/JakeWharton/Android-ViewPagerIndicator
   Demo Apk: https://play.google.com/store/apps/details?id=com.viewpagerindicator.sample

2. JazzyViewPager
   An easy to use ViewPager that adds an awesome set of custom swiping animations. Just change your ViewPagers to JazzyViewPagers and you're good to go!
   Project Address: https://github.com/jfeinstein10/JazzyViewPager
   Demo Apk: https://github.com/jfeinstein10/JazzyViewPager/blob/master/JazzyViewPager.apk?raw=true

3. Android-DirectionalViewPager
   ViewPager class that supports paging both vertically and horizontally as well as changing between the two at runtime.
   Project Address: https://github.com/JakeWharton/Android-DirectionalViewPager
   Demo Apk: https://market.android.com/details?id=com.directionalviewpager.sample

4. android-pulltorefresh
   Provide a reusable Pull to Refresh widget for Android, support ListView, ExpandableListView, GridView, WebView, ScrollView, HorizontalScrollView, ViewPager, support pulling Down from the top, and Pulling Up from the bottom and so on.
   Project Address: https://github.com/chrisbanes/Android-PullToRefresh
   Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/pull-to-refreshview-demo.apk?raw=true

5. FancyCoverFlow
   FancyCoverFlow is a flexible Android widget providing out of the box view transformations to give your app a unique look and feel.
   Project Address: https://github.com/davidschreiber/FancyCoverFlow
   Demo Apk: https://play.google.com/store/apps/details?id=at.technikum.mti.fancycoverflow.samples
   Renderings:

6. AndroidTouchGallery
   Android widget for gallery, using viewpager. Allow pinch zoom and drag for images by url. Widget allows use it in Android > 2.0
   Project Address: https://github.com/Dreddik/AndroidTouchGallery
   Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/touch-gallery-demo.apk?raw=true

7. Android Auto Scroll ViewPager
   Android Auto scroll ViewPager or ViewPager in ViewPager. Project Address: https://github.com/Trinea/android-auto-scroll-view-pager
   Demo Apk: https://play.google.com/store/apps/details?id=cn.trinea.android.demo
   Document: https://www.trinea.cn/android/auto-scroll-view-pager/

8. Salvage view
   Generic view recycler and ViewPager PagerAdapter implementation.
   Project Address: https://github.com/JakeWharton/salvage

9. Android PagerSlidingTabStrip
   An interactive indicator to navigate between the different pages of a ViewPager.
   Project Address: https://github.com/astuetz/PagerSlidingTabStrip
   Demo Apk: https://play.google.com/store/apps/details?id=com.astuetz.viewpager.extensions.sample

10. SmartTabLayout
    A custom ViewPager title strip which gives continuous feedback to the user when scrolling.This library has been added some features and utilities based on android-SlidingTabBasic project of Google Samples.
    Project Address: https://github.com/ogaclejapan/SmartTabLayout
    Demo Apk: https://play.google.com/store/apps/details?id=com.ogaclejapan.smarttablayout.demo
    Renderings:

11. ViewPager3D
    A ViewPager with 3D effect
    Project Address: https://github.com/inovex/ViewPager3D

12. AnimaTabsview
    A animation effect like 网易云音乐
    Project Address: https://github.com/wuyexiong/transparent-over-animtabsview
    Demo: http://v.youku.com/v_show/id_XNzA4MjY5NjA0.html

13. LoopingViewPager A ViewPager which support loop scroll. Project Address: https://github.com/imbryk/LoopingViewPager

14. android_page_curl Paging effect of iReader. Project Address: https://github.com/harism/android_page_curl Demo App:iReader Demo: https://www.youtube.com/watch?v=iwu7P5PCpsw

15. ViewPagerIndicator A custom ViewPagerIndicator. Project Address: https://github.com/LuckyJayce/ViewPagerIndicator

16. ScreenSlideIndicator Lightweight ViewPager Cycle Indicator. Project Address: ScreenSlidePager Renderings:

17. ViewPager3D A ViewPager with 3D effect. Project Address: https://github.com/inovex/ViewPager3D

18. AnimaTabsview A animation effect like 网易云音乐 Project Address: https://github.com/wuyexiong/transparent-over-animtabsview Demo: http://v.youku.com/v_show/id_XNzA4MjY5NjA0.html

19. LoopingViewPager A ViewPager which support loop scroll. Project Address: https://github.com/imbryk/LoopingViewPager

20. android_page_curl Paging effect of iReader. Project Address: https://github.com/harism/android_page_curl Demo App: iReader Demo: https://www.youtube.com/watch?v=iwu7P5PCpsw

21. ViewPagerIndicator A custom ViewPagerIndicator. Project Address: https://github.com/LuckyJayce/ViewPagerIndicator

22. ScreenSlideIndicator Lightweight ViewPager Cycle Indicadtor. Project Address: ScreenSlidePager Renderings:

23. RecyclerViewPager A ViewPager implemention inherits from RecyclerView. Support fling operation like gallary and custom fling speed. Support Fragment. Project Address: RecyclerViewPager Renderings:

24. WoWoViewPager A material design Viewpager.Optimized for scrolling app intros or making your CV app. Free and open source. WoWoViewPager combines animations and viewpager. When you are swiping viewpager, you are also controlling the frames of the animation. Just like rewinding time. Project Address: WoWoViewPager Renderings:

5. GridView

1. StaggeredGridView
   A modified version of Android's experimental StaggeredGridView. Includes own OnItemClickListener and OnItemLongClickListener, selector, and fixed position restore. Contains cache, extends from ViewGroup.
   Project Address: https://github.com/maurycyw/StaggeredGridView
   Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/staggered-gridview-demo.apk?raw=true
   Similar App: Pinterest

2. AndroidStaggeredGrid
   An Android staggered grid view which supports multiple columns with rows of varying sizes. Extends from AbsListView.
   Project Address: https://github.com/etsy/AndroidStaggeredGrid
   Similar App: Pinterest

3. PinterestLikeAdapterView
   An Android multi column list view like Pinterest. Allow pull to refresh.
   Project Address: https://github.com/GDG-Korea/PinterestLikeAdapterView
   Similar App: Pinterest

4. DraggableGridView
   A drag-and-drop scrolling grid view for Android, extends from ViewGroup. It can swich from up to bottom, if you want switch from left screen to right please use PagedDragDropGrid below.
   Project Address: https://github.com/thquinn/DraggableGridView
   Demo Apk: https://github.com/thquinn/DraggableGridView/blob/master/bin/DraggableGridViewSample.apk?raw=true
   You can customize the width and height of item , and the count of item each line , you can also customize the padding of line . Default value is 20dp.
   Project Address: DraggableGridView
   Renderings:
   

5. DividedDraggableView Draggable grid view with divided line. Project Address: https://github.com/andyken/DividedDraggableView Renderings:

6. StickyGridHeaders
   StickyGridHeaders is an Android library that provides a GridView that shows items in sections with headers. By default the section headers stick to the top like the People app in Android 4.x but this can be turned off.
   Project Address: https://github.com/TonicArtos/StickyGridHeaders
   Renderings:

7. PagedDragDropGrid
   An Android ViewGroup that implements a paged grid with drag'n'drop moveable items. It can swich from left screen to right, if you want switch from up to bottom please use DraggableGridView above.
   Project Address: https://github.com/mrKlar/PagedDragDropGrid
   Demo视频：http://youtu.be/FYTSRfthSuQ

8. Android-DraggableGridViewPager
   Zaker style grid view pager, support dragging & rearrange, using as zaker's main screen. Project Address: https://github.com/zzhouj/Android-DraggableGridViewPager
   Demo Apk: https://github.com/Trinea/trinea-download/blob/master/draggable-grid-viewpager-demo.apk?raw=true

9. GridView with Header and Footer
   Same with ListView. It allows you call addHeaderView(), addFooterView to add views to GridView.
   Project Address：https://github.com/liaohuqiu/android-GridViewWithHeaderAndFooter
   Renderings：
   

6. ImageView

1. PhotoView
   Implementation of ImageView for Android that supports zooming, by various touch gestures, like multi-touch and double-tap. Works perfectly when using used in a scrolling parent (such as ViewPager). Allows the application to be notified when the displayed Matrix has changed. Useful for when you need to update your UI based on the current zoom/scroll position.
   Project Address: https://github.com/chrisbanes/PhotoView
   Demo Apk: https://play.google.com/store/apps/details?id=uk.co.senab.photoview.sample
   Similar App: photup

2. android-gif-drawable
   Views and Drawable for displaying animated GIFs on Android. Bundled GIFLib via JNI is used to render frames. This way should be more efficient than WebView or Movie classes. Animation starts automatically and run only if View with attached GifDrawable is visible.
   Project Address: https://github.com/koral--/android-gif-drawable

3. ImageViewEx
   Extension of Android's ImageView that supports animated GIFs and includes a better density management.
   Project Address: https://github.com/frapontillo/ImageViewEx
   Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/imageviewex-demo.apk?raw=true

4. RoundedImageView
   A fast ImageView that supports rounded corners and ovals or circles. Project Address: https://github.com/vinc3m1/RoundedImageView
   Renderings:

5. SelectableRoundedImageView
   ImageView that supports different radiuses on each corner. It also supports oval(and circle) shape and border.
   Project Address: https://github.com/pungrue26/SelectableRoundedImageView
   Demo Apk: https://play.google.com/store/apps/details?id=com.joooonho
   Renderings:

6. ColorArt
   iTunes 11-style color matching code for Android, is a library that uses an image to create a themed image/text display.
   Project Address: https://github.com/MichaelEvans/ColorArt
   Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/color-art-demo.apk?raw=true

7. CircleImageView
   A circular ImageView for Android. Project Address: https://github.com/hdodenhof/CircleImageView
   Renderings:

8. ImageViewZoom
   Android ImageView widget with zoom and pan capabilities.
   Project Address: https://github.com/sephiroth74/ImageViewZoom
   Similar App: https://play.google.com/store/apps/details?id=com.aviary.android.feather

9. KenBurnsView
   Android library that provides an extension to ImageView that creates an immersive experience by animating its drawable using the Ken Burns Effect.
   Project Address: https://github.com/flavioarfaria/KenBurnsView

10. CustomShapeImageView
    Custom shape ImageView using PorterDuffXfermode with paint shapes and SVGs.
    Project Address: https://github.com/MostafaGazar/CustomShapeImageView
    Renderings:
    

7. ProgressBar

1. SmoothProgressBar
   A small Android library allowing you to have a smooth and customizable horizontal indeterminate ProgressBar.
   Project Address: https://github.com/castorflex/SmoothProgressBar
   Demo Apk: https://play.google.com/store/apps/details?id=fr.castorflex.android.smoothprogressbar.sample

2. ProgressWheel
   A progress wheel for android, intended for use instead of the standard progress bar.
   Project Address: https://github.com/Todd-Davies/ProgressWheel
   Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/progress-wheel-demo.apk?raw=true

3. android-square-progressbar
   A progressbar which goes around an image.
   Project Address: https://github.com/mrwonderman/android-square-progressbar
   Demo Apk: https://play.google.com/store/apps/details?id=net.yscs.android.square_progressbar_example
   Similar App: square
   Renderings:

4. HoloCircularProgressBar
   HoloCircularProgressBar is a Custom View implementation for Android you might know from the Android Clock App from Android 4.1
   Project Address: https://github.com/passsy/android-HoloCircularProgressBar
   Similar App: Android4.1 Clock App
   Renderings:

5. ProgressButton
   A custom progress indicator with a tiny footprint.
   Project Address: https://github.com/f2prateek/progressbutton
   Document: http://f2prateek.com/progressbutton/
   Renderings:

6. GoogleProgressBar
   Android library to display different kind of google related animations for the progressBar.
   Project Address: https://github.com/jpardogo/GoogleProgressBar
   Renderings:

7. TH-ProgressButton
   Circular progress View button inspired by FFCircularProgressView.
   Project Address: https://github.com/torryharris/TH-ProgressButton
   Renderings:

8. NumberProgressBar ProgressBar with percentage number. Project Address:https://github.com/daimajia/NumberProgressBar Renderings:

9. CircularProgressDrawable Circular Progress Drawable. Project Address:https://github.com/Sefford/CircularProgressDrawable Renderings:

10. Android-RoundCornerProgressBar Android ProgressBar drawing Round Corner. Project Address:https://github.com/akexorcist/Android-RoundCornerProgressBar Renderings:

11. circular-progress-button Button could switch to show circular progress. Project Address:https://github.com/dmytrodanylyk/circular-progress-button Renderings:

12. WaveView A ProgressBar which showing wave look progress. Project Address:https://github.com/john990/WaveView Demo地址：https://raw.github.com/john990/WaveView/master/screenshot%26apk/demo.unaligned.apk Renderings:

13. MaterialLoadingProgressBar MaterialLoadingProgressBar provide a styled ProgressBar which looks like SwipeRefreshLayout's loading indicator(support-v4 v21+) Project Address:https://github.com/lsjwzh/MaterialLoadingProgressBar Renderings:

14. LoadingDrawable some beautiful android loading drawable, can be combined with any view as the loading view and the progressbar.
    Project Address:https://github.com/dinuscxj/LoadingDrawable Renderings:
    

15. StackedHorizontalProgressBar Stacked dual progress indicator progressbar.

Project Address:https://github.com/nisrulz/stackedhorizontalprogressbar

Renderings:

8. TextView

Include TextView and other views extend TextView, like EditText, Button, RadioButton and so on.

1. android-flowtextview
   A TextView for Android which supports text wrapping around other views.
   Project Address: https://code.google.com/p/android-flowtextview/
   Renderings: http://i949.photobucket.com/albums/ad332/vostroman1500/1.png

2. Android Form EditText
   Android form edit text is an extension of EditText that brings data validation facilities to the edit text.
   Project Address: https://github.com/vekexasia/android-edittext-validator
   Demo Apk: https://play.google.com/store/apps/details?id=com.andreabaccega.edittextformexample

3. Emojicon
   A library to show emoji in TextView, EditText (like WhatsApp) for Android.
   Project Address: https://github.com/rockerhieu/emojicon
   Document: http://rockerhieu.com/emojicon/

4. android-circlebutton
   Circle button widget for Android, extend from ImageView actually.
   Project Address: https://github.com/markushi/android-circlebutton
   Demo Apk: https://github.com/markushi/android-circlebutton/blob/master/example/example.apk

5. Segmented Radio Buttons for Android
   Android implementation of iPhone's segmented control.
   Project Address: https://github.com/vinc3m1/android-segmentedradiobutton
   Demo Apk: https://github.com/thquinn/DraggableGridView/blob/master/bin/DraggableGridViewSample.apk?raw=true
   Renderings:

6. Chips EditText Library
   Chips EditText, Token EditText, Bubble EditText, Spannable EditText and etc.. There are many names of this control. Implement by SpannableStringBuilder actually
   Project Address: https://github.com/kpbird/chips-edittext-library
   Demo Apk: https://github.com/kpbird/chips-edittext-library/tree/master/ChipsEditTextDemo/bin

7. AutoFitTextView
   A TextView that automatically resizes text to fit perfectly within its bounds.
   Project Address: https://github.com/grantland/android-autofittextview

8. Shimmer for Android
   An Android TextView with a shimmering effect. Project Address: https://github.com/RomainPiel/Shimmer-android

9. Titanic
   Android experiment showing a sinking TextView.
   Project Address: https://github.com/RomainPiel/Titanic
   Renderings:
   

10. MoneyTextView
    A TextView used for inputing and adding money.
    Project Address: https://github.com/andyken/MoneyTextView
    Renderings:
    

9. Others

1. youtube-play-icon
   Material style morphing play-pause icon.
   Project Address: https://github.com/alxrm/youtube-play-icon
   Renderings:
   

2. achartengine
   AChartEngine is a charting library for Android applications. It currently supports the following chart types: line chart, area chart, scatter chart, time chart, bar chart, pie chart, bubble chart, doughnut chart, range (high-low) bar chart, dial chart / gauge, combined (any combination of line, cubic line, scatter, bar, range bar, bubble) chart, cubic line chart and so on.
   Project Address: https://code.google.com/p/achartengine/
   Official Website: http://www.achartengine.org/
   Renderings:
   http://www.achartengine.org/dimages/sales_line_and_area_chart.png
   http://www.achartengine.org/dimages/temperature_range_chart.png
   http://www.achartengine.org/dimages/combined_chart.png
   http://www.achartengine.org/dimages/budget_chart.png
   Similar App: Wordpress Android，Google Analytics

3. GraphView
   Android Graph Library for creating zoomable and scrollable line and bar graphs.
   Project Address: https://github.com/jjoe64/GraphView
   Demo Project: https://github.com/jjoe64/GraphView-Demos
   Demo Apk: https://play.google.com/store/apps/details?id=com.sothree.umano
   Similar App: Wordpress Android，Google Analytics

4. android-flip
   A component for flip animation on Android, which is similar to the effect in Flipboard iPhone/Android. Project Address: https://github.com/openaphid/android-flip
   Demo Apk: https://github.com/openaphid/android-flip/blob/master/FlipView/Demo/APK/Aphid-FlipView-Demo.apk?raw=true
   Similar App: flipboard

5. FlipImageView
   Small android lib allowing you to make a flip imageview easily, by extending FlipImageView.
   Project Address: https://github.com/castorflex/FlipImageView
   Demo Apk: https://play.google.com/store/apps/details?id=fr.castorflex.android.flipimageview

6. SwipeBackLayout
   An Android library that helps you to build app with swipe back gesture.
   Project Address: https://github.com/Issacw0ng/SwipeBackLayout
   Demo Apk: https://play.google.com/store/apps/details?id=me.imid.swipebacklayout.demo
   Similar App: Zhihu

7. Cards-UI
   A library that allows you to easily mimic Google Play's card layout on Android.
   Project Address: https://github.com/afollestad/Cards-UI
   Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/cards-ui-demo.apk?raw=true

8. cardslib
   Card Library provides an easy way to display a UI Card in your Android app. You can display single cards, list of cards and grid or staggered grid of Cards.
   Project Address: https://github.com/gabrielemariotti/cardslib
   Demo Apk: https://play.google.com/store/apps/details?id=it.gmariotti.cardslib.demo

9. android-styled-dialogs
   A simple library for styling Android dialogs in the Holo theme. It also removes boilerplate code for displaying simple dialogs.
   Project Address: https://github.com/inmite/android-styled-dialogs
   Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/styled-dialogs-demo.apk?raw=true

10. Crouton
    Context sensitive notifications for Android, like toast. Include style like alert, confirm , info and click to dismiss, allow to set time of display and customed view.
    Project Address: https://github.com/keyboardsurfer/Crouton
    Demo Apk: http://play.google.com/store/apps/details?id=de.keyboardsurfer.app.demo.crouton

11. supertooltips
    SuperToolTips is an Open Source Android library that allows developers to easily create Tool Tips for views.
    Project Address: https://github.com/nhaarman/supertooltips
    Demo Apk: https://play.google.com/store/apps/details?id=com.haarman.supertooltips

12. Android ViewBadger
    A simple way to "badge" any given Android view at runtime without having to cater for it in layout. Project Address: https://github.com/jgilfelt/android-viewbadger
    Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/android-viewbadger.apk?raw=true
    Renderings: https://github-camo.global.ssl.fastly.net/a705a3e88c75ae2394943bd7c56f725697616ea8/687474703a2f2f7777772e6a65666667696c66656c742e636f6d2f766965776261646765722f76622d31612e706e67

13. Android Sliding Up Panel
    This library provides a simple way to add a draggable sliding up panel (popularized by Google Music, Google Maps and Rdio) to your Android application. Umano Team <3 Open Source.
    Project Address: https://github.com/umano/AndroidSlidingUpPanel
    Demo Apk: https://play.google.com/store/apps/details?id=com.sothree.umano
    Similar App: Google Music

14. android-times-square
    Standalone Android widget for picking a single date from a calendar view.
    Project Address: https://github.com/square/android-times-square
    Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/times-square-demo.apk?raw=true

15. android-calendar-card
    Android calendar view (like card)
    Project Address: https://github.com/kenumir/android-calendar-card
    Demo Apk: https://play.google.com/store/apps/details?id=com.wt.calendarcardsample
    Renderings:

16. ColorPickerView
    A simple yet beautiful color picker component for Android.
    Project Address: https://code.google.com/p/color-picker-view/
    Renderings:

17. HoloColorPicker
    An Android Holo themed colorpicker. Project Address: https://github.com/LarsWerkman/HoloColorPicker
    Demo Apk: https://docs.google.com/file/d/0BwclyDTlLrdXRzVnTGJvTlRfU2s/edit

18. AndroidWheel
    Custom wheel widget for android.
    Project Address: https://github.com/sephiroth74/AndroidWheel
    Renderings:

19. TableFixHeaders
    Android library that implements a table with fixed headers.
    Project Address: https://github.com/InQBarna/TableFixHeaders
    Demo Apk: http://bit.ly/13buAIq

20. UITableView
    Library and example project on how to use the UITableView component.
    Project Address: https://github.com/thiagolocatelli/android-uitableview
    Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/ui-tableview-demo.apk?raw=true

21. ATableView
    Create iOS-like tables (UITableView) for Android, using UIKit object model.
    Project Address: https://github.com/dmacosta/ATableView
    Demo Apk: https://play.google.com/store/apps/details?id=com.nakardo.atableview.demo

22. UndoBar
    The UI component for Android advanced UI pattern undo-bar, used in Gmail app.
    Project Address: https://github.com/soarcn/UndoBar
    Renderings:

23. Inscription
    Inscription is an open source library used to display information about your Android app, like info of change or new feature.
    Project Address: https://github.com/MartinvanZ/Inscription

24. ActivityTransition
    An android project presenting some transitions you can use between activities, like fade, flip, fly into and so on. Project Address: https://github.com/ophilbert/ActivityTransition
    Demo Apk： https://github.com/jfeinstein10/JazzyViewPager/blob/master/JazzyViewPager.apk?raw=true

25. GlowPadBackport
    A backport of the Android 4.2 GlowPadView that works on the SDK on API levels 4+
    Project Address: https://github.com/rock3r/GlowPadBackport
    Demo Apk: https://play.google.com/store/apps/details?id=net.sebastianopoggi.samples.ui.GlowPadSample
    Renderings:

26. GlowPadView
    GlowPadView for Android is a great library to implement Googles lockscreen and new alarmclock style.
    Project Address: https://github.com/nadavfima/GlowPadView
    Renderings: https://raw.github.com/nadavfima/GlowPadView/master/example.png

27. android-lockpattern
    Lockpattern activity for Android.
    Project Address: https://code.google.com/p/android-lockpattern/
    Demo Apk: https://play.google.com/store/apps/details?id=group.pals.android.lib.ui.lockpattern.demo
    Document: https://code.google.com/p/android-lockpattern/wiki/QuickUse

28. PatternLock
    Yet another pattern lock library for Android.
    Project Address：https://github.com/DreaminginCodeZH/PatternLock
    Demo Apk：https://github.com/DreaminginCodeZH/PatternLock/raw/master/dist/sample.apk
    Renderings：

29. RangeBar
    Android widget for selecting a range of values. It provides for the selection of a range of values rather than a single value.
    Project Address: https://github.com/edmodo/range-bar
    Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/range-bar-demo.apk?raw=true
    Renderings:

30. SuperToasts
    The SuperToasts library enhances and builds upon the Android Toast class. Some of the features of this library include context sensitive toasts (SuperActivityToasts), toasts with buttons and icons, non context sensitive toasts (SuperToasts), and a new style of toasts (SuperCardToasts) with many customization options for each.
    Project Address: https://github.com/JohnPersano/SuperToasts
    Demo Apk: https://play.google.com/store/apps/details?id=com.supertoastsdemo
    Renderings:

31. GoogleDateTimePickers
    New Google Date and time pickers. Project Address: https://github.com/Mirkoddd/GoogleDateTimePickers
    Document: https://play.google.com/store/apps/details?id=com.mirko.sample&hl=it

32. UndoBar
    An implementation of Android's Undo Bar as seen in Google's Gmail app.
    Project Address: https://github.com/jenzz/Android-UndoBar
    Renderings:

33. ColorPickerPreference
    ColorPickerPreference for android to create color picker in preferences.
    Project Address: https://github.com/attenzione/android-ColorPickerPreference
    Renderings:

34. HoloGraphLibrary
    This is a library written to allow beautiful graphs and charts to be easily incorporated into your Android application.
    Project Address: https://bitbucket.org/danielnadeau/holographlibrary/src
    Document: https://bitbucket.org/danielnadeau/holographlibrary/wiki/Home

35. ChromeView
    Android WebView implementation that uses the latest Chromium code.
    Project Address: https://github.com/pwnall/chromeview

36. Discrollview
    DiscrollView support Item fading in or out, translate or scale.
    Project Address: https://github.com/flavienlaurent/discrollview
    Demo Apk: https://github.com/flavienlaurent/discrollview/raw/master/sample.apk

37. Android Slider Preference Library
    Android library that allows applications to add dialog-based slider widgets to their settings.
    Project Address: https://github.com/jayschwa/AndroidSliderPreference

38. ShowcaseView library
    Highlight the best bits of your app to users quickly. Project Address: https://github.com/amlcurran/ShowcaseView

39. android-segmented-control
    ios7 UISegmentedControl for android. Project Address: https://github.com/hoang8f/android-segmented-control

40. PullScrollView
    Pull and background rebound effect.
    Project Address: https://github.com/MarkMjw/PullScrollView
    Renderings:
    

41. ArcLayout
    A very simple arc layout library. Project Address: https://github.com/ogaclejapan/ArcLayout
    Demo Apk: https://play.google.com/store/apps/details?id=com.ogaclejapan.arclayout.demo
    Renderings:

42. FinestWebView
    Beautiful and customizable Android Activity that shows web pages within an app.
    Project Address: https://github.com/TheFinestArtist/FinestWebView-Android
    Sample App: https://play.google.com/store/apps/details?id=com.thefinestartist.finestwebview.sample
    Renderings:

43. YouTubePlayerActivity
    Simply pass a url to play youtube video in new activity. It supports screen orientation, media volume control and etc.
    Project Address: https://github.com/TheFinestArtist/YouTubePlayerActivity
    Sample App: https://play.google.com/store/apps/details?id=com.thefinestartist.ytpa.sample
    Renderings:

44. TristateToggleButton Customizable tri-state toggle button (with three states, three state toggle) for Android. Project Address: https://github.com/BeppiMenozzi/TriStateToggleButton

45. Knob Fully customizable rotating knob selector with discrete values for Android. Replaces radio buttons, integer value inputs and ViewPager indicators. Project Address: https://github.com/BeppiMenozzi/Knob

46. Spotlight
    Android Library that lights items for tutorials or walk-throughs etc... Project Address: https://github.com/TakuSemba/Spotlight
    Renderings:
    

47. SpeedView
    Dynamic Speedometer and Gauge for Android. amazing, powerful, and multi shape :zap: Project Address: https://github.com/anastr/SpeedView
    Renderings:
    

2. Common Util Libs

Include Dependency Injection, ImageCache, Network, Database ORM, Android common lib, Compatible low version, Multimedia, Event Bus, Sensor, Security, Plug-in, File, Others

1. Dependency Injection

Speeds up Android development by dependency injection

1. AndroidAnnotations(Code Diet)
   AndroidAnnotations is an Open Source framework that speeds up Android development. It takes care of the plumbing, and lets you concentrate on what's really important.
   Project Address: https://github.com/excilys/androidannotations
   Document: https://github.com/excilys/androidannotations/wiki
   Official Website: http://androidannotations.org/

2. roboguice
   RoboGuice 2 takes the guesswork out of development. Inject your View, Resource, System Service, or any other object, and let RoboGuice 2 take care of the details.
   Project Address: https://github.com/roboguice/roboguice
   Document: https://github.com/roboguice/roboguice/wiki

3. butterknife
   View "injection" library for Android.
   Project Address: https://github.com/JakeWharton/butterknife
   Document: http://jakewharton.github.io/butterknife/

4. Dagger
   A fast dependency injector for Android and Java.
   Project Address: https://github.com/square/dagger
   Document: http://square.github.io/dagger/

5. Anvil A small library for building reactive UI components, data binding and event listener injection. Inspired by React.
   Project Address: https://github.com/zserge/anvil
   Document: http://anvil.site/
   

2. Image Cache

1. Android-Universal-Image-Loader
   Powerful and flexible library for loading, caching and displaying images on Android.
   Project Address: https://github.com/nostra13/Android-Universal-Image-Loader
   Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/universal-imageloader-demo.apk?raw=true
   Document: http://www.intexsoft.com/blog/item/74-universal-image-loader-part-3.html

2. picasso
   A powerful image downloading and caching library for Android
   Project Address: https://github.com/square/picasso
   Document: http://square.github.io/picasso/

3. ImageCache
   Image Cache, support multi caching algorithms
   Project Address: https://github.com/Trinea/AndroidCommon
   Demo Apk: https://play.google.com/store/apps/details?id=cn.trinea.android.demo
   Document: https://www.trinea.cn/android/android-imagecache/

4. Cube ImageLoader
   Easy to use, high performance, used in some of the Apps in Alibaba Group. Project Address：https://github.com/etao-open-source/cube-sdk
   Demo Apk：https://github.com/liaohuqiu/cube-sdk/raw/master/cube-sdk-sample.apk
   Document：http://cube-sdk.liaohuqiu.net/
   Renderings:

3. Network

1. Retrofit
   Type-safe REST client for Android and Java by Square
   Project Address: https://github.com/square/retrofit
   Document: http://square.github.io/retrofit/

2. okhttp
   An HTTP+SPDY client for Android and Java applications.
   Project Address: https://github.com/square/okhttp
   Document: http://square.github.io/okhttp/

3. Asynchronous Http Client for Android
   An asynchronous, callback-based Http client for Android built on top of Apache's HttpClient libraries.
   Project Address: https://github.com/loopj/android-async-http
   Document: http://loopj.com/android-async-http/

4. android-query
   Android-Query (AQuery) is a light-weight library for doing asynchronous tasks and manipulating UI elements in Android.
   Project Address: https://code.google.com/p/android-query/
   Document: https://code.google.com/p/android-query/#Why_AQuery?
   Demo Apk: https://play.google.com/store/apps/details?id=com.androidquery

5. Async Http Client
   Asynchronous Http and WebSocket Client library for Java
   Project Address: https://github.com/AsyncHttpClient/async-http-client
   Document: http://sonatype.github.io/async-http-client/

6. Ion
   Android Asynchronous Networking and Image Loading
   Project Address: https://github.com/koush/ion
   Document: https://github.com/koush/ion#more-examples

7. Android Networking
   Android Networking is a powerful library for doing any type of networking in Android Applications Project Address: https://github.com/amitshekhariitbhu/AndroidNetworking
   Document: http://amitshekhariitbhu.github.io/AndroidNetworking/

8. Http Request
   A simple convenience library for using a HttpURLConnection to make requests and access the response.
   Project Address: https://github.com/kevinsawicki/http-request
   Document: https://github.com/kevinsawicki/http-request#examples

9. RoboSpice
   RoboSpice is a modular android library that makes writing asynchronous network requests easy
   Project Address: https://github.com/stephanenicolas/robospice
   Demo Apk: https://github.com/stephanenicolas/RoboDemo/downloads
   

4. Database

1. greenDAO
   GreenDAO is a light & fast ORM solution for Android that maps objects to SQLite databases. Being highly optimized for Android, greenDAO offers great performance and consumes minimal memory.
   Project Address: https://github.com/greenrobot/greenDAO
   Document: http://greendao-orm.com/documentation/
   Official Website: http://greendao-orm.com/

2. ActiveAndroid
   Active record style SQLite persistence for Android
   Project Address: https://github.com/pardom/ActiveAndroid
   Document: https://github.com/pardom/ActiveAndroid/wiki/_pages

3. Sprinkles
   Sprinkles is a boiler-plate-reduction-library for dealing with databases in android applications
   Project Address: https://github.com/emilsjolander/sprinkles
   Document: http://emilsjolander.github.io/blog/2013/12/18/android-with-sprinkles/

4. ormlite-android
   ORMLite Android functionality used in conjunction with ormlite-core
   Project Address: https://github.com/j256/ormlite-android
   Document: http://ormlite.com/sqlite_java_android_orm.shtml
   

5. Android common lib

1. Guava
   The Guava project contains several of Google's core libraries that we rely on in our Java-based projects: collections, caching, primitives support, concurrency libraries, common annotations, string processing, I/O, and so forth.
   Project Address: https://code.google.com/p/guava-libraries/
   Document: https://code.google.com/p/guava-libraries/wiki/GuavaExplained

2. Volley
   Easy, Fast Networking for Android
   Project Address: https://android.googlesource.com/platform/frameworks/volley
   Github Address: https://github.com/mcxiaoke/android-volley
   Document: http://commondatastorage.googleapis.com/io-2013/presentations/110%20-%20Volley-%20Easy,%20Fast%20Networking%20for%20Android.pdf

3. AndroidCommon
   Android common lib, include ImageCache, HttpCache, DropDownListView, DownloadManager, Utils and so on
   Project Address: https://github.com/Trinea/AndroidCommon
   Demo Apk: https://play.google.com/store/apps/details?id=cn.trinea.android.demo
   Document: https://www.trinea.cn/android/android-common-lib/

4. shipfaster
   Sample project demonstrating usage of Dagger + Otto + Robolectric + Retrofit + Picasso + OkHttp
   Project Address: https://github.com/pyricau/shipfaster

5. CleanAndroidCode
   This project is a proof of concept to show how to integrate Dagger, Otto and AndroidAnnotations.
   Project Address: https://github.com/pyricau/CleanAndroidCode
   

6. Android Compatible low version

1. ActionBarSherlock
   Action bar implementation which uses the native action bar on Android 4.0+ and a custom implementation on pre-4.0 through a single API and theme.
   Project Address: https://github.com/JakeWharton/ActionBarSherlock
   Demo Apk: https://play.google.com/store/apps/details?id=com.actionbarsherlock.sample.demos

2. Nine Old Androids
   Android library for using the Honeycomb animation API on all versions of the platform back to 1.0!
   Project Address: https://github.com/JakeWharton/NineOldAndroids
   Demo Apk: https://play.google.com/store/apps/details?id=com.jakewharton.nineoldandroids.sample
   Document: http://nineoldandroids.com/

3. HoloEverywhere
   Bringing Holo Theme from Android 4.1 to 2.1 and above.
   Project Address: https://github.com/Prototik/HoloEverywhere
   Demo Apk: https://raw.github.com/Prototik/HoloEverywhere/repo/org/holoeverywhere/demo/2.1.0/demo-2.1.0.apk
   Document: http://android-developers.blogspot.com/2012/01/holo-everywhere.html

4. SherlockNavigationDrawer
   Modification of the Android NavigationDrawer sample to use ActionbarSherlock so that we can use the NavigationDrawer on older devices
   Project Address: https://github.com/tobykurien/SherlockNavigationDrawer

5. Notifications4EveryWhere
   Bringing Notifications from Android 4.1 to 2.2 and above.
   Project Address: https://github.com/youxiachai/Notifications4EveryWhere
   NavigationDrawerDocument: http://developer.android.com/training/implementing-navigation/nav-drawer.html

6. Android Switch Widget Backport
   A backport of the Switch widget that was introduced on Android 4.X to Android2.1++
   Project Address: https://github.com/BoD/android-switch-backport
   Demo Apk: https://play.google.com/store/apps/details?id=org.jraf.android.backport.switchwidget.sample
   Document: https://github.com/BoD/android-switch-backport#using-the-switch

7. android-datepicker
   Android 4.0 DatePicker backported to 2.2
   Project Address: https://github.com/SimonVT/android-datepicker
   

7. Multimedia

1. cocos2d-x
   cocos2d-x is a multi-platform framework for building 2d games, interactive books, demos and other graphical applications. It is based on cocos2d-iphone, but instead of using Objective-C, it uses C++. It works on iOS, Android, Windows Phone, OS X, Windows and Linux.
   Project Address: https://github.com/cocos2d/cocos2d-x
   Document: http://www.cocos2d-x.org/wiki
   Official Website: http://www.cocos2d-x.org/

2. Vitamio
   Vitamio is an open multimedia framework for Android and iOS, with full and real hardware accelerated decoder and renderer.
   Project Address: https://github.com/yixia/VitamioBundle
   Document: http://www.vitamio.org/docs/

3. PhotoProcessing
   A demo of how you can process photos leveraging the ndk, support Instafix, Ansel, Testino, XPro, Retro, BW, Sepia, Cyano, Georgia, Sahara, HDR, Rotate, Flip and so on
   Project Address: https://github.com/lightbox/PhotoProcessing
   Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/photo-processing.apk?raw=true

4. Android StackBlur
   Android StackBlur is a library that can perform a blurry effect on a Bitmap based on a gradient or radius, and return the result.
   Project Address: https://github.com/kikoso/android-stackblur
   Demo Apk: https://github.com/kikoso/android-stackblur/blob/master/StackBlurDemo/bin/StackBlurDemo.apk?raw=true
   Document: https://github.com/kikoso/android-stackblur#usage

5. Bitmap Smart Clipping using OpenCV
   Bitmap Smart Clipping using OpenCV
   Project Address: https://github.com/beartung/tclip-android

6. Cropper
   Android widget for cropping and rotating an image.
   Project Address: https://github.com/edmodo/cropper
   Document: https://github.com/edmodo/cropper/wiki
   Renderings:

7. android-crop
   Android library project for cropping images
   Project Address: https://github.com/jdamcd/android-crop
   Renderings:

8. TileView
   The TileView widget is a subclass of ViewGroup that provides a mechanism to asynchronously display tile-based images, with additional functionality for 2D dragging, flinging, pinch or double-tap to zoom, adding overlaying Views (markers), built-in Hot Spot support, dynamic path drawing, multiple levels of detail, and support for any relative positioning or coordinate system.
   Project Address: https://github.com/moagrius/TileView
   Demo Apk: http://moagrius.github.io/TileView/TileViewDemo.apk

9. BlurEffectForAndroidDesign
   Sample to show how to implement blur graphical tricks
   Project Address: https://github.com/PomepuyN/BlurEffectForAndroidDesign

10. android-eye
    Change your android phone to surveillance camera
    Project Address: https://github.com/Teaonly/android-eye
    Demo Apk: https://play.google.com/store/apps/details?id=teaonly.droideye

11. libpng for Android
    libpng for Android NDK
    Project Address: https://github.com/julienr/libpng-android
    Document: http://www.libpng.org/pub/png/libpng.html
    

12. Image File Selector
    Project Address: https://github.com/sw926/ImageFileSelector

8. Event Bus

A typical use case for Android apps is gluing Activities, Fragments, and background threads together. Conventional wiring of those elements often introduces complex and error-prone dependencies and life cycle issues.

1. EventBus
   Android optimized event bus that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.
   Project Address: https://github.com/greenrobot/EventBus
   Document: https://github.com/greenrobot/EventBus#general-usage-and-api

2. Otto
   An enhanced Guava-based event bus with emphasis on Android support.
   Project Address: https://github.com/square/otto
   Document: http://square.github.io/otto/
   Demo Apk: https://play.google.com/store/apps/details?id=de.greenrobot.eventperf
   

9. Sensor

1. Great Android Sensing Toolkit
   GAST is a toolkit for using Android's Sensing capabilities. It contains the examples, boiler plate code, and algorithms you need to properly use Android sensors.
   Project Address: https://github.com/gast-lib/gast-lib
   Demo Apk: https://play.google.com/store/apps/details?id=root.gast.playground
   Document: https://github.com/gast-lib/gast-lib#documentation

2. SensorManager
   Android Sensor Manager Library
   Project Address: https://github.com/nlathia/SensorManager
   Document: https://docs.google.com/document/d/1TqThJULb-4e6TGb1gdkAaPCfyuXStjJpbnt7a0OZ9OE/edit

3. GPSLogger
   GPSLogger is an Android app that logs GPS information to GPX, KML or text files and has options for annotating and sharing.
   Project Address: https://github.com/mendhak/gpslogger
   Demo Apk: https://play.google.com/store/apps/details?id=com.mendhak.gpslogger
   Document: http://code.mendhak.com/gpslogger/

4. Pedometer
   Lightweight pedometer app for Android using the hardware step sensor
   Project Address: https://github.com/j4velin/Pedometer

5. leapcast
   ChromeCast emulation app for any device
   Project Address: https://github.com/dz0ny/leapcast

6. Arduino-Communicator
   Very simple Android application for communicating with Arduino
   Project Address: https://github.com/jeppsson/Arduino-Communicator

7. android-pedometer
   App for Android phones that counts your steps.
   Project Address: https://github.com/bagilevi/android-pedometer
   Demo Apk: http://pedometer.googlecode.com/files/Pedometer-1.4.apk

8. OwnTracks for Android
   OwnTracks Android App
   Project Address: https://github.com/owntracks/android

9. Shake Detector library for Android
   This library provides a easy way to detect a shake movement using the build-in accelerometer and fire a callback on the UI thread every times it happens.
   Project Address: https://github.com/tbouron/ShakeDetector
   Demo Apk: https://play.google.com/store/apps/details?id=com.github.tbouron.shakedetector.example

10. Android heart rate monitor
    Android heart rate monitor
    Project Address: https://github.com/phishman3579/android-heart-rate-monitor

11. Bluetooth LE Library for Android
    This library allows for easy access to a Bluetooth LE device's AdRecord and RSSI value. It offers additional functionality for iBeacons.
    Project Address: https://github.com/alt236/Bluetooth-LE-Library---Android
    Demo Apk: https://play.google.com/store/apps/details?id=uk.co.alt236.btlescan
    

12. Sensey
    Android library which makes detecting gestures a breeze.
    Project Address: https://github.com/nisrulz/sensey

10. Security

1. SQLCipher
   SQLCipher is an SQLite extension that provides 256 bit AES encryption of database files.
   Project Address: https://github.com/sqlcipher/sqlcipher
   Document: http://sqlcipher.net/sqlcipher-for-android/

2. Conceal
   Conceal provides easy Android APIs for performing fast encryption and authentication of data, such as that stored on SD cards
   Project Address: https://github.com/facebook/conceal
   Document: https://github.com/facebook/conceal#usage

3. Android-PasscodeLock
   Android Library that provides passcode lock to your app
   Project Address: https://github.com/wordpress-mobile/Android-PasscodeLock
   Demo Apk: https://play.google.com/store/apps/details?id=com.sothree.umano
   Similar App: Wordpress Android, Alipay

4. GlowPadBackport
   A backport of the Android 4.2 GlowPadView that works on the SDK on API levels 4+
   Project Address: https://github.com/rock3r/GlowPadBackport
   Demo Apk: https://play.google.com/store/apps/details?id=net.sebastianopoggi.samples.ui.GlowPadSample
   Renderings:

5. GlowPadView
   GlowPadView for Android is a great library to implement Google's lockscreen and new alarmclock style. (Taken from Android's Source Code)
   Project Address: https://github.com/nadavfima/GlowPadView
   Renderings: https://raw.github.com/nadavfima/GlowPadView/master/example.png

6. android-lockpattern
   lockpattern activity for Android
   Project Address: https://code.google.com/p/android-lockpattern/
   Demo Apk: https://play.google.com/store/apps/details?id=group.pals.android.lib.ui.lockpattern.demo
   Document: https://code.google.com/p/android-lockpattern/wiki/QuickUse
   

11. Maps

1. GraphHopper Fast routing library and server using OpenStreetMap
   Project Address: https://github.com/graphhopper/graphhopper/
   Document: https://github.com/graphhopper/graphhopper/blob/master/docs/index.md#developers
   Example APK address: https://graphhopper.com/#community
   Official Website: https://graphhopper.com
   Similar App: https://github.com/graphhopper/graphhopper/blob/master/docs/android/index.md#cruiser-app
   Online Demo: https://graphhopper.com/maps

2. Mapsforge Software for maps rendering based on OpenStreetMap
   Project Address: https://github.com/mapsforge/mapsforge/
   Document: https://github.com/mapsforge/mapsforge/blob/master/docs/Getting-Started-Developers.md
   Example APK address: https://graphhopper.com/#community
   Renderings:

12. Others

1. Salvage view
   Generic view recycler and ViewPager PagerAdapter implementation.
   Project Address: https://github.com/JakeWharton/salvage

2. Android Priority Job Queue
   A Job Queue specifically written for Android to easily schedule jobs (tasks) that run in the background, improving UX and application stability.
   Project Address: https://github.com/path/android-priority-jobqueue
   Document: https://github.com/path/android-priority-jobqueue#getting-started

3. Glide Bitmap Pool
   Glide Bitmap Pool is a memory management library for reusing the bitmap memory Project Address: https://github.com/amitshekhariitbhu/GlideBitmapPool Document: https://amitshekhariitbhu.github.io/GlideBitmapPool/

4. jsoup
   Java HTML Parser, with best of DOM, CSS, and jquery
   Project Address: https://github.com/jhy/jsoup
   Official Website: http://jsoup.org/

5. ZIP
   ZeroTurnaround ZIP Library
   Project Address: https://github.com/zeroturnaround/zt-zip
   Document: https://github.com/zeroturnaround/zt-zip#examples

6. Cobub Razor
   Cobub Razor - Open Source Mobile Analytics Solution, include web, android，ios, window phone
   Project Address: https://github.com/cobub/razor
   Demo Apk: http://demo.cobub.com/razor
   Document: http://dev.cobub.com/

7. aFileChooser
   Android library that provides a file explorer to let users select files on external storage.
   Project Address: https://github.com/iPaulPro/aFileChooser

8. androidpn
   An open source project to provide push notification support for Android -- a xmpp based notification server and a client tool kit.
   Project Address: https://github.com/dannytiehui/androidpn

9. purePDF
   A complete actionscript PDF library
   Project Address: https://github.com/sephiroth74/purePDF

10. Bolts
    Bolts is a collection of low-level libraries designed to make developing mobile apps easier.
    Project Address: https://github.com/BoltsFramework/Bolts-Android/

11. CastCompanionLibrary-android
    CastCompanionLibrary-android is a library project to enable developers integrate Cast capabilities into their applications faster and easier.
    Project Address: https://github.com/googlecast/CastCompanionLibrary-android
    Document: https://developers.google.com/cast/

12. CastVideos-android
    CastVideos-android application shows how to cast videos from an android device in a way that is fully compliant with the Design Checklist.
    Project Address: https://github.com/googlecast/CastVideos-android
    Document: https://developers.google.com/cast/

13. Uninstall_Statics
    Android Statistical application is uninstalled
    Project Address: https://github.com/sevenler/Uninstall_Statics
    Document: http://www.cnblogs.com/zealotrouge/p/3157126.html

14. xCombine
    Android Plugin Framework
    Project Address: https://github.com/wyouflf/xCombine
    Document: http://my.oschina.net/u/1171837/blog/155377

15. Memento
    Memento is an annotation processor for Android that gives your activities a memory. It introduces the @Retain annotation, which allows you to retain arbitrary fields of an activity across configuration changes in a simple and type-safe manner.
    Project Address: https://github.com/mttkay/memento
    Document: https://github.com/mttkay/memento#usage

16. svg-android
    SVG parsing and rendering for Android
    Project Address: https://code.google.com/p/svg-android/

17. Office 365 SDK for Android Preview
    Office 365 SDK for Android Preview by Microsoft Open Technologies, Inc. support Microsoft SharePoint Lists, Microsoft SharePoint Files, Microsoft Exchange Calendar, Microsoft Exchange Contacts, Microsoft Exchange Mail
    Project Address: https://github.com/OfficeDev/Office-365-SDK-for-Android

18. OpenSpritz-Android
    OpenSpritz concept for Android, is a Spritz-like .epub and website reader for Android 3.0+
    Project Address: https://github.com/OnlyInAmerica/OpenSpritz-Android

19. FreeFlow
    A layout engine for Android that decouples layouts from the View containers that manage scrolling and view recycling. FreeFlow makes it really easy to create custom layouts and beautiful transition animations as data and layouts change
    Project Address: https://github.com/Comcast/FreeFlow
    Demo Apk: https://github.com/Comcast/FreeFlow/releases

20. Android Gesture Detectors Framework
    Gesture detector framework for multitouch handling on Android
    Project Address: https://github.com/Almeros/android-gesture-detectors
    

21. CacheUtilsLibrary
    This is a simple Android utils library to write any type of data into cache files and then read them later, using Gson to serialize and deserialize these data.
    Project Address: https://github.com/westlinkin/CacheUtilsLibrary

22. EasyDeviceInfo
    Android library to get device information in a super easy way.
    Project Address: https://github.com/nisrulz/easydeviceinfo

3. Excellent projects

Linux
Project Address: https://github.com/torvalds/linux
Android
Project Address: https://android.googlesource.com/

(1) ZXing
ZXing ("zebra crossing") is an open-source, multi-format 1D/2D barcode image processing library implemented in Java, with ports to other languages.
Project Address: https://github.com/zxing/zxing
Demo Apk: https://play.google.com/store/apps/details?id=com.google.zxing.client.android

(2) photup
With photup you can share your photos to your Facebook profile, quicker than ever before.
Project Address: https://github.com/chrisbanes/photup
Demo Apk: https://play.google.com/store/apps/details?id=uk.co.senab.photup

(3) github-android GitHub Android App
Project Address: https://github.com/github/android
Demo Apk: https://play.google.com/store/apps/details?id=com.github.mobile

(4) Notes
MIUI Notes Project Address: https://github.com/MiCode/Notes
Demo Apk: https://github.com/Trinea/TrineaDownload/blob/master/miui-note-demo.apk?raw=true

(5) weicuiyuan
Sina Weibo Android Client
Project Address: https://github.com/qii/weiciyuan
Demo Apk: https://play.google.com/store/apps/details?id=org.qii.weiciyuan

(6) gnucash-android
Gnucash for Android mobile companion application.
Project Address: https://github.com/codinguser/gnucash-android
Demo Apk: http://play.google.com/store/apps/details?id=org.gnucash.android

(7) AntennaPod
A podcast manager for Android
Project Address: https://github.com/danieloeh/AntennaPod
Demo Apk: https://play.google.com/store/apps/details?id=de.danoeh.antennapod

(8) ChaseWhisplyProject
An augmented reality attempt
Project Address: https://github.com/tvbarthel/ChaseWhisplyProject
Demo Apk: https://play.google.com/store/apps/details?id=fr.tvbarthel.games.chasewhisply

(9) Tweet Lanes
Tweet Lanes for Android
Project Address: https://github.com/chrislacy/TweetLanes
Demo Apk: https://play.google.com/store/apps/details?id=com.tweetlanes.android

(10) Financius
Android Expense Manager
Project Address: https://github.com/mvarnagiris/Financius
Demo Apk: https://play.google.com/store/apps/details?id=com.code44.finance

(11) todo.txt-android
Official Todo.txt Android app for managing your todo.txt file stored in Dropbox.
Project Address: https://github.com/ginatrapani/todo.txt-android
Demo Apk: https://play.google.com/store/apps/details?id=com.todotxt.todotxttouch

(13) Muzei Live Wallpaper
Muzei Live Wallpaper for Android
Project Address: https://github.com/romannurik/muzei
Demo Apk: https://play.google.com/store/apps/details?id=net.nurik.roman.muzei

(14) Etar Calendar
Etar is an OpenSource material designed calendar
Project Address: https://github.com/xsoh/Etar-Calendar
Demo Apk: https://play.google.com/store/apps/details?id=ws.xsoh.etar
Renderings:

4: Development and testing tools

Android open source projects about development tools and testing tools.

1. Development productivity tools

1. Json2Java
   Automate processing Java classes to mirror json models.
   Project Address: https://github.com/jonfhancock/JsonToJava
   Online Demo: http://jsontojava.appspot.com/

2. IntelliJ Plugin for Android Parcelable boilerplate code generation
   IntelliJ Plugin for Android Parcelable boilerplate code generation.
   Project Address: https://github.com/mcharmas/android-parcelable-intellij-plugin
   Renderings:

3. Android Holo Colors IntelliJ Plugin
   IntelliJ / Android Studio plugin for Android Holo Colors
   Project Address: https://github.com/jeromevdl/android-holo-colors-idea-plugin
   Renderings:

4. Android Drawable Factory
   A Java Application to create appropriate Drawable resources for your Android application
   Project Address: https://github.com/tizionario/AndroidDrawableFactory
   Renderings:

5. SelectorChapek for Android
   Android Studio plugin which automatically generates drawable selectors from appropriately named resources.
   Project Address: https://github.com/inmite/android-selector-chapek

6. Android Action Bar Style Generator
   Easily create a simple, attractive and seamless custom action bar style for your Android application
   Project Address: https://github.com/jgilfelt/android-actionbarstylegenerator
   Online Demo: http://jgilfelt.github.io/android-actionbarstylegenerator/

7. ButterKnifeZelezny
   Android Studio plug-in for generating ButterKnife injections from selected layout XML.
   Project Address: https://github.com/inmite/android-butterknife-zelezny

8. RoboCoP
   Pure Java code generation tool for generating a fully functional ContentProvider for Android.
   Project Address: https://github.com/mediarain/RoboCoP

9. appiconsizes
   IOS and Android App Icon size generator
   Project Address: http://www.appiconsizes.com/

10. Gradle Retrolambda Plugin
    This plugin will automatically build your java or android project with Retrolambda, giving you lambda goodness on java 6 or 7. It relies on the wonderful retrolambda by Esko Luontola.
    Project Address: https://github.com/evant/gradle-retrolambda

11. jsonschema2pojo
    Generates Java types from JSON Schema (or example JSON) and annotates those types for data-binding with Jackson 1.x or 2.x, Gson.
    Project Address: https://github.com/joelittlejohn/jsonschema2pojo
    Online Demo: http://www.jsonschema2pojo.org/

2. Develop self-test related

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.
   Project Address: https://github.com/stephanenicolas/Quality-Tools-for-Android

2. android-test-kit
   Google's Testing Tools For Android
   Project Address: https://code.google.com/p/android-test-kit/
   Document: https://code.google.com/p/android-test-kit/w/list

3. robolectric
   Robolectric is a unit test framework that de-fangs the Android SDK so you can test-drive the development of your Android app.
   Project Address: https://github.com/robolectric/robolectric
   Demo Apk: https://github.com/robolectric/robolectricsample
   Document: http://robolectric.org/

4. Android FEST
   A set of FEST assertion helpers geared toward testing Android.
   Project Address: https://github.com/square/fest-android

5. BoundBox
   BoundBox provides an easy way to test an object by accessing all its fields, constructor and methods, public or not. BoundBox breaks encapsulation.
   Project Address: https://github.com/stephanenicolas/boundbox

6. Hugo
   Annotation-triggered method call logging for your debug builds.
   Project Address: https://github.com/JakeWharton/hugo

7. scalpel
   A surgical debugging tool to uncover the layers under your app.
   Project Address: https://github.com/JakeWharton/scalpel

8. Android Screenshot library
   On-demand screenshots for your Android integration tests
   Project Address: https://github.com/rtyley/android-screenshot-lib

9. sonar-android-lint-plugin
   Extension plugin for Android Lint in Sonar
   Project Address: https://github.com/SonarCommunity/sonar-android
   Document: http://docs.codehaus.org/display/SONAR/Android+Plugin
   

3. Testing tools

1. Spoon
   Distributing instrumentation tests to all your Androids.
   Project Address: https://github.com/square/spoon
   

4. Development and build environment

1. Buck
   Buck is an Android build tool, is more powerful than ant.
   Project Address: https://github.com/facebook/buck

2. Android Maven Plugin
   A plugin for Android application development with Apache Maven 3.1.1+ and the Android SDK.
   Project Address: https://github.com/jayway/maven-android-plugin

3. umeng-muti-channel-build-tool
   Umeng packaing tools
   Project Address: https://github.com/umeng/umeng-muti-channel-build-tool

4. Genymotion
   THE FASTER ANDROID EMULATOR
   Project Address: http://www.genymotion.com/

5. gradle-mvn-push
   Helper to upload Gradle Android Artifacts to Maven repositories
   Project Address: https://github.com/chrisbanes/gradle-mvn-push
   Document: https://github.com/chrisbanes/gradle-mvn-push#usage

6. Android Emulator Plugin for Jenkins
   Android Emulator plugin for Jenkins
   Project Address: https://github.com/jenkinsci/android-emulator-plugin

7. Android Maven Plugin
   A tool to install components of the Android SDK to use with the Maven Android Plugin.
   Project Address: https://github.com/mosabua/maven-android-sdk-deployer

8. SDK Manager Plugin
   Gradle plugin which downloads and manages your Android SDK.
   Project Address: https://github.com/JakeWharton/sdk-manager-plugin
   

5. Others

1. ViewServer
   Local server for Android's HierarchyViewer
   Project Address: https://github.com/romainguy/ViewServer

2. GridWichterle for Android
   This app will show grid overlay over whole system which helps you to verify your excellent app design.
   Project Address: https://github.com/inmite/android-grid-wichterle
   Demo Apk: https://play.google.com/store/apps/details?id=eu.inmite.android.gridwichterle

3. Catlog
   Logcat-reading app for Android
   Project Address: https://github.com/nolanlawson/Catlog
   Online Demo: https://play.google.com/store/apps/details?id=com.nolanlawson.logcat

4. PID Cat
   Colored logcat script which only shows log entries for a specific application package.
   Project Address: https://github.com/JakeWharton/pidcat

5. ACRA
   ACRA is a library enabling Android Application to automatically post their crash reports to a GoogleDoc form. It is targetted to android applications developers to help them get data from their applications when they crash or behave erroneously.
   Project Address: https://github.com/ACRA/acra
   Document: https://github.com/ACRA/acra/wiki/BasicSetup

6. Android Resource Navigator
   Chrome Extension providing enhanced resource navigation for GitHub hosted Android projects
   Project Address: https://github.com/jgilfelt/android-resource-navigator
   Online Demo: https://chrome.google.com/webstore/detail/android-resource-navigato/agoomkionjjbejegcejiefodgbckeebo?hl=en&gl=GB
   

4. Outstanding individuals and groups

1. Individual

1. JakeWharton
   Github Address: https://github.com/JakeWharton
   Masterpiece: ActionBarSherlock，Android-ViewPagerIndicator，Nine Old Androids，SwipeToDismissNOA，hugo，butterknife，Android-DirectionalViewPager, scalpel
   HomePage: http://jakewharton.com/

2. Chris Banes
   Github Address: https://github.com/chrisbanes
   Masterpiece: ActionBar-PullToRefresh，PhotoView，Android-BitmapCache，Android-PullToRefresh
   HomePage: http://chris.banes.me/

3. Koushik Dutta
   Github Address: https://github.com/koush
   Masterpiece: Superuser，AndroidAsync，UrlImageViewHelper，ion
   HomePage: http://koush.com/

4. Simon Vig
   Github Address: https://github.com/SimonVT
   Masterpiece: android-menudrawer，MessageBar
   HomePage: http://simonvt.net/

5. Manuel Peinado
   Github Address: https://github.com/ManuelPeinado
   Masterpiece: FadingActionBar，GlassActionBar，RefreshActionItem，QuickReturnHeader

6. Emil Sj?lander
   Github Address: https://github.com/emilsjolander
   Masterpiece: StickyListHeaders，sprinkles，android-FlipView
   HomePage: http://emilsjolander.se/

7. greenrobot
   Github Address: https://github.com/greenrobot
   Masterpiece: greenDAO，EventBus
   HomePage: http://greenrobot.de/

8. Jeff Gilfelt
   Github Address: https://github.com/jgilfelt
   Masterpiece: android-mapviewballoons，android-viewbadger，android-actionbarstylegenerator，android-sqlite-asset-helper
   HomePage: http://jeffgilfelt.com

9. Romain Guy
   Github Address: https://github.com/romainguy
   Masterpiece: ViewServer
   HomePage: http://www.curious-creature.org/category/android/
   Other：http://www.flickr.com/photos/romainguy

10. sephiroth74
    Github Address: https://github.com/sephiroth74
    Masterpiece: ImageViewZoom，HorizontalVariableListView，AndroidWheel，purePDF
    HomePage: http://www.sephiroth.it/

11. Cyril Mottier
    Github Address: https://github.com/cyrilmottier
    Masterpiece: GreenDroid，Polaris
    HomePage: http://cyrilmottier.com/
    

2. Group

1. Square
   Github Address: https://github.com/square
   Masterpiece: okhttp, fest-android，android-times-square, picasso, dagger, spoon and so on HomePage: http://square.github.io/

2. Inmite s.r.o.
   Github Address: https://github.com/inmite
   Masterpiece: android-styled-dialogs，android-grid-wichterle，android-selector-chapek
   HomePage: http://www.inmite.eu/
   

License

Copyright 2014 trinea.cn

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.