Discusses four tools that can be used to build Android smartphone apps. Specifically IRB for scripting on the device, Ruboto for building arbitrary apps, Rhodes (a framework which includes a fast compiled Ruby) and RhoSync (a mobile app integration server which uses Ruby)

1. Using Ruby for AndroidDevelopment

2. Background Android is a big step forward in mobile operating systems But… Java? Dynamic script languages are more productive And don’t have to be too slow Four main ways to leverage Ruby…

3. Leveraging Ruby for Android Scripting: automate phone tasks and testing “From scratch” app development replace Java Framework development Less Ruby, compiled Ruby App integration Full Ruby via server

4. Ruboto http://github.com/ruboto Ruboto-core [sudo] gem install ruboto-core Ruboto-core-irb Ruboto-demos * Ruboto slides here derived from earlier presentations by Daniel Jackoway. Apologies for missing attribution in original post.

5. Android in Ruby public void Activity.onCreate(Bundle bundle) public void Activity.onPause() public void onClick(View view) handle_create do |bundle| handle_pause do handle_click do |view|

8. Activities only

10. Anything you can do with Java

11. Zero Java

12. Zero XML

14. JRuby (rvm)

15. Android SDK

16. Generate an emulator

18. $ --name andevcon # Name of app

19. $ --target android-8 # Froyo

21. $ --name andevcon # Name of app

22. $ --target android-8 # Froyo

24. require 'ruboto.rb’

25. ruboto_import_widgets :TextView,

26. :LinearLayout, :Button

27. $activity.handle_create do |bundle|

29. linear_layout :orientation => LinearLayout::VERTICAL do

30. @text_view = text_view :text => "What hath Matz wrought?"

31. button :text => "M-x butterfly", :width => :wrap_content

32. end

33. end

34. handle_click do |view|

35. if view.getText == 'M-x butterfly'

36. @text_view.setText "What hath Matz wrought!"

37. toast 'Flipped a bit via butterfly'

38. end

39. end

42. Rhodes Architecture your app code You write: RhoSync Server model model HTML templates controller Rhodes app generator Backend app source adapter model model HTML templates controller Backend app source adapter Rhodes components ORM (Rhom) Ruby executor We provide: Device capabilities RhoSync client Backend app smartphone device

43. Rhodes vs. Competition Only one that supports all devices Only one with synchronized data Only MVC framework First Ruby on the device First and only hosted development service for mobile

44. Ruby for App Integration…RhoSync [sudo] gem install rhosync Write a “source adapter” Query Create Update Delete Eliminates many tasks in app integration No device integration/connection code (assumes in database) Removes data storage step If its Rails backend, not even source adapter is necessary Better user experience Data is realtime updated No wait for data to be retrieved

45. RhoSync Source Adapter rhosync app YourApp cdYourApp rhosync source Product Generates … class Product <SourceAdapter def query(params=nil) # TODO: Query your backend data source and assign the records # to a nested hash structure called @result. For example: end def create(create_hash,blob=nil) # TODO: Create a new record in your backend data source end end

46. RhoHub First and only “Development as a Service for mobile” More than 10,000 developers signed up in the last year ~100 more per day Hosted development – WRITE APPS FOR IPHONES FROM WINDOWS Web-based IDE for ease of use Build for all smartphones online – no need to install SDKs Hosted runtime No need to set up RhoSync server Collaboration Work with other developers on same project over the web

48. http://docs.rhomobile.com

49. http://rhomobile.com/products/rhodes

50. http://rhomobile.com/products/rhosync

51. http://rhohub.com