The document discusses developing cross-platform mobile applications using Xamarin. It introduces Xamarin, which allows developers to build native iOS and Android apps using C# and .NET. It highlights that Xamarin apps look and feel native while sharing code across platforms. The document also covers architecting mobile apps with Xamarin, using Xamarin.Forms to build user interfaces with shared code, and includes a demo section.

1. Developing Cross-Platform Applications

2. Agenda
• Why Native?
• What is Xamarin?
• Architecting Mobile Apps
• Xamarin Forms
• Demo

3. Why Native?

4. Two Challenges for Building Apps

5. The Anatomy of a Native App
Xamarin apps look and feel native because they are native
Native User Interfaces Native API Access Native Performance

6. Cross-Platform Mobile Development
• Building high-quality Apps is hard:
• Different presentation styles, interaction styles and software stacks
• Devices have different screen sizes, input modes and hardware capabilities
• New devices and OS versions are introduced multiple times per year
• Network connectivity and power levels
fluctuate widely in typical usage scenarios
• New consumer applications regularly
extend and revise the standards and
set the bar higher for good mobile
applications

7. Xamarin.iOS does full Ahead Of Time
(AOT) compilation to produce an ARM
binary for Apple’s App Store.
Xamarin.Android takes
advantage of Just In Time
(JIT) compilation on the
Android device.

8. What is
Xamarin?

9. Xamarin brings open source .NET to mobile
development, enabling every developer to
build truly native apps for any device in C#
and F#.
What is Xamarin?

10. What is Xamarin?

11. Xamarin
Nat Friedman Miguel de Icaza James Montemagno
CEO and Co-Founder CTO and Co-Founder Developer Evangelist

12. Make it fast, easy and fun
to create great mobile apps
Xamarin’s Mission

13. Xamarin Mobile Lifecycle

14. Explosive Growth
350+ employees
15,000+customers
Customers in 120 countries
1,400,000+ registered developers
32,000 new developers per month
Visionary in the Gartner Magic
Quadrant# of developers

15. Explosive Growth

16. Architecting
Mobile Apps

17. Build App Multiple Times
• Expensive to staff
multiple platform-
specific teams
• Expensive to
maintain multiple
code bases
• Slows innovation

18. The Write-Once-Run-Anywhere Approach
• Non-standart UI
• Limited API access
• Non-native performance
• Poor user experience

19. Xamarin’s Unique Approach
Native With
Code Sharing

20. Windows APIs

21. iOS APIs | 100% Coverage

22. Android APIs | 100% Coverage

23. Xamarin Designer for iOS in Xamarin Studio

24. Anything you can do in Objective-C or Java
can be done in C# with Xamarin using Visual Studio

25. Xamarin
Forms

26. Portable Class Libraries

27. Xamarin Architecture Choices

28. Xamarin.Forms
Quickly and easily build native
user interfaces using shared code
Xamarin.Forms elements map to
native controls and behaviors
Mix-and-match Xamarin.Forms
with native APIs Shared App Logic
Shared UI Code

29. Pages
Content MasterDetail Navigation Tabbed Carousel

30. Layouts
Stack Absolute Relative Grid ContentView ScrollView Frame

31. Controls
ActivityIndicator BoxView Button DatePicker Editor
Entry Image Label ListView Map
OpenGLView Picker ProgressBar SearchBar Slider
Stepper TableView TimePicker WebView EntryCell
ImageCell SwitchCell TextCell ViewCell

32. NuGet Package Manager
NuGet support combined with the Xamarin Component Store gives Xamarin
developers the most comprehensive ecosystem of libraries at their fingertips

33. Why Xamarin?

34. Better Mobile Productivity

45. Event Tracking

46. Event Tracking

47. Issue Tracking

48. Issue Tracking

49. Issue Tracking - Detail

50. Issue Tracking – Device & User Data

51. Demo

52. Q & A