How To: Build Android and iOS app in Java

So you’ve decided to go cross-platform? Now its time to choose the right tool! Lets talk about various mobile cross-platfrom tools, their pros and cons. When and why you would like to go cross-platform in the first place and why RoboVM might be a good choice for you. Also lets look at what advantages does RoboVM/Xamarin architecture provides you as a developer and a wanna be Open Source Commiter.

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1. How To: Develop an app for Android and iOS in Java Alexey Buzdin, September 2015
2. @AlexeyBuzdin Developer / Trainer at C.T.Co
4. Angry Birds
5. Inbox
6. Spotify
7. Twitter
8. go X-platform? Go Native or
10. New product checklist - Release date - Platform count - Platform priorities - App future __________ __________ __________ __________ ? ? ? ?
11. - Release date - Platform count - Platform priorities - App future __________ __________ __________ __________ 1 New product checklist
12. - Release date - Platform count - Platform priorities - App future Native __________ __________ __________ __________ 1 New product checklist
13. - Release date - Platform count - Platform priorities - App future __________ __________ __________ __________ All Fast All at once ? New product checklist
14. - Release date - Platform count - Platform priorities - App future __________ __________ __________ __________ All Fast Cordova / PhoneGap All at once New product checklist Short Lasting
15. Cordova / PhoneGap
16. - Performance problems - Non native UI - Easy to add Platforms - One codebase - Native interop Cordova / PhoneGap Consequences
17. - Release date - Platform count - Platform priorities - App future __________ __________ __________ __________ All Fast All at once Short Lasting New product checklist
18. - Release date - Platform count - Platform priorities - App future __________ __________ __________ __________ All Fast Xamarin Forms / CodenameOne All at once Short Lasting New product checklist
19. Xamarin Forms / CodenameOne
20. - Performance like native - Native UI - Hard to modify gen code - Native interop - One codebase Xamarin Forms / CodenameOne Consequences
21. - Release date - Platform count - Platform priorities - App future __________ __________ __________ __________ All Long One by One Long living New product checklist
22. - Release date - Platform count - Platform priorities - App future __________ __________ __________ __________ All Long Xamarin / RoboVM / Tengu One by One Long living New product checklist
23. Xamarin / RoboVM / Tengu
24. - Performance like native - Native UI - Native library binding - Shared common core - Separate UI modules per platform Xamarin / RoboVM / Tengu Consequences
25. http://java.dzone.com/articles/state-native-vs-web-vs-hybrid Great article
26. Xamarin / RoboVM / Tengu
28. Core UI UI With one language
29. Core UI UI With one language 30-50% 50-70%
30. C# Java iOS Xamarin / RoboVM / Tengu
31. what are we sharing?
33. MVVM ViewModel Model View
34. View - User Interface Model - Logic and Data ViewModel - binds UI properties with internals - communicate with commands
35. MVVM ViewModel Model View
36. MVVM View Model ViewModel shared
37. Activity ViewController ViewModel Service DAO
39. Activity ViewController onLongClick(coord) ViewModel putPoint()
40. Activity ViewController onLongClick(coord) ViewModel putPoint() DAO savePoint()
42. Activity ViewController search(input) ViewModel search(input)
43. Activity ViewController search(input) ViewModel search(input) Service internalSearch(input)
44. Activity ViewController search(input) ViewModel search(input) Service internalSearch(input) sends ShowLocationEvent
45. RoboVM 1.8.0 Released yesterday http://www.robovm.org/
46. -Java bytecode to native -familiar infrastructure gradle, maven, Idea, eclipse java library reuse -ios lib binding; Robopods -Debugger
49. -uses android-rt library -no code generation -has reflection support -xcode ui bindings jackson or gson should work
50. Core UI UI With Java
51. -Library reuse Together -Build scripts reuse -Model / persistance reuse -Java 8 with retrolambda
52. More sharing?
53. Activity ViewController onClick() ViewModel DAO savePoint(coord) saveCurrentLocation()
54. Activity ViewController onClick() ViewModel DAO savePoint(coord) ? saveCurrentLocation()
55. Activity ViewController onClick() ViewModel saveCurrentLocation() DAO savePoint(coord) ? Service getCoord()
56. Service IGPSService Android Impl iOS Impl shared client- specific
57. How to provide igpsservice?
58. - dao = new dao()
59. - gps = new iOSGPSservice() - dao = new dao()
60. - vm = new ViewModel(gps, dao) - gps = new iOSGPSservice() - dao = new dao()
61. - new Activity(vm) - vm = new ViewModel(gps, dao) - gps = new iOSGPSservice() - dao = new dao()
62. Dependency injection
63. which di?
64. which di? guice or weld!
65. which di? guice or weld! code generation sorry
66. ever heard of Dagger? http://square.github.io/dagger/
67. COMPILE-TIME CODE GENERATION!* Dagger features *partially
68. COMPILE-TIME CODE GENERATION!* Dagger features *partially sorry won’t work on and
69. ever heard of Dagger 2.0? http://google.github.io/dagger/
70. COMPILE-TIME CODE GENERATION! Dagger 2.0 features will work on and
71. https://github.com/LArchaon/robovm-dagger2-sample
72. Summary -no silver bullet -java xamarin is here! -think of reuse in advance -involve in Robovm design
73. q&A
74. http://ej.uz/jug-gdg-vilnius-2015 September 24