Using Ruby in Android Development

1. Using Ruby for AndroidDevelopment

2. BackgroundAndroid is a big step forward in mobile operating systemsBut… Java?Dynamic script languages are more productiveAnd don’t have to be too slowFour main ways to leverage Ruby…

3. Leveraging Ruby for AndroidScripting: automate phone tasks and testing“From scratch” app development replace JavaFramework developmentLess Ruby, compiled RubyApp integrationFull Ruby via server

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

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

6. How It WorksYourActivity < RubotoActivity < ActivityRubotoActivity implements callbacks

7. They tell Ruby to exec blocks, pass params alongRuby for Scripting: IRBhttp://www.appbrain.com/app/ruboto-irb-%28ruby-on-android%29/org.ruboto.irb

8. Activities only

9. Can’t ship .apkRuboto-coreGoals

10. Anything you can do with Java

11. Zero Java

12. Zero XML

13. Support pluginsRuboto InstallJDK

14. JRuby (rvm)

15. Android SDK

16. Generate an emulator

17. gem install ruboto-coreRuboto App Generation$ ruboto gen app \

18. $ --package com.adamblum.andevcon \

19. $ --path andevcon \ # where app files go

20. $ --name andevcon \ # Name of app

21. $ --target android-8 \ # Froyo

22. $ --activity MyActivity # Name of ActivityRuboto App Generation$ ruboto gen app \

23. $ --package com.adamblum.andevcon \

24. $ --path andevcon \ # where app files go

25. $ --name andevcon \ # Name of app

26. $ --target android-8 \ # Froyo

27. $ --activity MyActivity # Name of ActivityRuboto Activityassets/scripts/my_activity.rb

28. require 'ruboto.rb’

29. ruboto_import_widgets :TextView,

30. :LinearLayout, :Button

31. $activity.handle_create do |bundle|

32. setTitle 'This is the Title’Ruboto Activity (continued)setup_content do

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

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

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

36. end

37. end

38. handle_click do |view|

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

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

41. toast 'Flipped a bit via butterfly'

42. end

43. end

44. endInstall$ rake install # builds .apk, installs to emulator

45. $ rake; adb -d install -r bin/*-debug.apkRuby for An App Framework…RhodesPortabilityWrite it once and it runs on all smartphones: BlackBerry, iPhone, Windows Mobile, Android, Symbian, Win32Leverage Your Web SkillsBuild the app quickly in HTML and RubyOffline Use and Easy Backend IntegrationWork with synchronized local data when offlineEasily connect to any backend app through web servicesExploit device capabilitiesGPS, PIM data, camera, push/SMS, native mapping, barcode, signature capture, …Enterprise Security CompliantEncrypt data on the device, remote wipe of device, secure authentication…

46. Rhodes Architectureyour app codeYou write:RhoSyncServermodelmodelHTML templatescontrollerRhodesappgeneratorBackendappsourceadaptermodelmodelHTML templatescontrollerBackendappsourceadapterRhodes componentsORM (Rhom)RubyexecutorWe provide:DevicecapabilitiesRhoSync clientBackendappsmartphone device

47. Rhodes vs. CompetitionOnly one that supports all devicesOnly one with synchronized dataOnly MVC frameworkFirst Ruby on the deviceFirst and only hosted development service for mobile

48. Ruby for App Integration…RhoSync[sudo] gem install rhosyncWrite a “source adapter” QueryCreateUpdate DeleteEliminates many tasks in app integrationNo device integration/connection code (assumes in database)Removes data storage stepIf its Rails backend, not even source adapter is necessaryBetter user experienceData is realtime updatedNo wait for data to be retrieved

49. RhoSync Source Adapterrhosync app YourAppcdYourApprhosync source ProductGenerates …class Product <SourceAdapterdef 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 sourceendend

50. RhoHubFirst and only “Development as a Service for mobile”More than 10,000 developers signed up in the last year~100 more per dayHosted development – WRITE APPS FOR IPHONES FROM WINDOWSWeb-based IDE for ease of useBuild for all smartphones online – no need to install SDKsHosted runtimeNo need to set up RhoSync serverCollaboration Work with other developers on same project over the web

51. Resourceshttp://github.com/ruboto

52. http://docs.rhomobile.com

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

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

55. http://rhohub.com

56. [email protected]

Using Ruby in Android Development

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