- Cross platform mobile app development allows building apps that can run on multiple operating systems like iOS, Android, Blackberry etc using a single codebase. This is done through frameworks like PhoneGap that allow using web technologies like HTML, CSS and JavaScript but also provide access to device capabilities via plugins. - While cross platform apps offer benefits like being cost effective, there are also challenges around performance, differing platform capabilities and the need to test on multiple platforms. PhoneGap Build helps address issues of working with multiple platforms and SDKs. Developers are advised to take a multi platform approach and be ready for emerging platforms.

1. Cross platform
App Development

2. About me
Gautam Chaudhary
Web & Mobile App developer
www.gautamchaudhary.com

3. Why mobile apps?

4. Why Mobile apps?
• billions of Smartphone units
• more revenue potential
• always with the user
• … and everywhere.

5. Increase in revenue

6. Then what is the
problem?

7. mobile is a
minefield

8. Too many platforms

9. Operating System Language used
iOS…………………………….... Objective C
Android……………………….. Java
Blackberry……………………. J2ME
Windows Phone…………… .Net
Bada………………………….... C++
WebOS………………………… HTML,CSS,JS
Ubuntu Phone……………… QML based QT and more
Tizen……………………………. C++
Firefox OS……………………. HTML,CSS,JS

10. you need to learn

11. NO.

12. …or
many programmers and
more money

13. Yes,
MORE money

17. • Inefficiency • Bad Code
• Communication gap • Delays

18. Then what?

19. Mobile Web

20. Mobile Web Apps

21. Web Apps Result:
Native Web
Cross-platform
Linkable

22. Web Apps Result:
Native Web
Cross-platform
Linkable
Discoverable
Device APIs

23. WHAT?!
Device APIs?

24. Device APIs

25. Device APIs

26. Now what?

27. Nitobi Team

36. PhoneGap provides
a JavaScript Library
that reaches out
into the native
APIs.
That means
anything the device
supports is doable.

38. Camera API Example

39. Compatibility

40. Compatibility
iOS Symbian
Android Tizen
Blackberry Firefox OS
Windows phone Ubuntu Mobile
webOS

41. Style Libraries

42. Jquery Mobile Android Holo Theme

43. Jquery Mobile iOS Theme

44. Kendo UI

45. But what if I need to do some
Native task?

46. Plugins

47. Plugins
Native code
(Java, Obj C etc.)

48. Plugins

49. Examples

51. tripcase

52. Hockey Community

53. Completure - Police radio scanner

54. Warning
Phonegap is not a UI framework
PhoneGap doesn’t include a browser and or a
rendering engine
Phonegap doesn’t compile
Every platform needs its own compilation
HTML5/CSS3 compatibility varies

55. Important points
• Performance and memory usage
• Responsive CSS using media queries
• DPIs

56. Multiple SDK, IDE
problem

57. Phonegap Build

59. Don’t be fanatic
Be multiplatform

60. Be ready for future

61. Ubuntu phone

62. tizen

63. Firefox OS

64. Everything in HTML5/CSS

66. Thank you!
www.gautamchaudhary.com