Lecture about useful Android libraries. aDevMeetup #13, 2014

1. Useful Android
Libraries
Tomáš Kypta

2. Libraries
• saves time and work
• it might be painful without libraries
• back-porting new API to older Android versions
• simplifying API

3. Libraries
• The ideal library?
• “perform one task and perform it well”
• open-source

4. Dialogs
• Why do we need a library for dialogs?

5. Dialogs

6. Dialogs
• Let’s simplify
• android-styled-dialogs

7. Dialogs
• android-styled-dialogs
• backports dialogs in Holo theme
• makes styling and using dialogs a piece of cake

8. Dialogs

9. Pull-to-refresh
• ActionBar-PullToRefresh

10. Swipe-to-dismiss

11. Swipe-to-dismiss with Undo

12. Swipe-to-dismiss
• Android-SwipeToDismiss
• SwipeToDismissNOA
• backport to Android 2.x
• SwipeToDismissUndoList
• with undo

13. REST API
• Retrofit
• simple REST client for Android and Java
• synchronous
• asynchronous
• observable (RxJava)

14. Image loaders
• displaying images from web

15. Image loaders
• Volley
• NetworkImageView
• Picasso
• easy to use
• Android-Universal-Image-Loader
• powerful and flexible library

16. View Injection
• getting rid of boilerplate code
• TextView title = (TextView)
findViewById(R.id.title);!
• Butter Knife
• @InjectView(R.id.title) TextView title;!
• can’t be used in libraries

17. Dependency injection
• Dagger

18. Event bus
• Otto
• Guava based event bus

19. IntelliJ IDEA plugins
• android-selector-chapek
• generates drawable selectors from appropriately
named Android resources

20. IntelliJ IDEA plugins
• android-butterknife-zelezny
• allows one-click creation of Butterknife view
injections

21. UI debugging
• android-grid-wichterle
• app that shows grid overlay
• helps to verify app design

22. UI debugging
• Scalpel
• debugging tool to uncover
the layers under our app

23. UI niceties
• Crouton

24. Unit testing
• Roboelectric
• fest-android
• FEST assertions geared toward testing Android

25. Developing Libraries

26. Developing Libraries
• jar
• so
• apklib
• aar

27. Developing Libraries
• How to publish?
• Maven Central Repository

28. THE END