The document discusses the capabilities of Xamarin for developing cross-platform mobile applications using C#. It covers the advantages of native app performance, tools like Xamarin Studio, Visual Studio extensions, and the approach to code sharing across platforms. The presentation also highlights the significance of utilizing C# for native API binding and showcases successful implementations by various companies.

1. C# Everywhere
Cross-Platform Apps with Xamarin
Sasha Goldshtein
CTO, Sela Group
blog.sashag.net @goldshtn
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin

2. everyone in this
room is a
mobile
developer
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin

3. The Search for the Holy Grail
End-user
experience
Native
Developer
productivit
y
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin
XXaammaarrinin
Web/hy
brid

4. The Xamarin Approach
• Fully native apps written entirely in C#
• Visual Studio designer, editor, debugger
• 100% of the native platform API available
• Sharing logic across platforms with PCLs
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin

5. C# on 2.6 Billion Devices
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin

6. How Xamarin Works
• C# bindings to 100% of the native API
• .NET runtime installed on the device as
part of the application
• Native compilation
– iOS: ahead-of-time compilation
– Android: just-in-time compilation (like Java)
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin

7. Tools and Platforms
• Xamarin Studio stand-alone IDE
– Cross-platform: OS X and Windows
– Supports iOS, Android, OS X
• Visual Studio extension
– Windows only
– Requires OS X build host for OS X and iOS
– Supports Windows Phone and Windows 8
targets
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin

8. Xamarin Successes
Rdio
Bosch-Siemens
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin
Calca

9. Building an Android app in Visual Studio
DEMO
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin

10. Code Sharing Philosophy
• The view layer usually requires duplication
• The rest of the app (up to 90% code) can
be shared
Windows
Phone UI
AAnnddrrooidid UUII iOiOSS UUII Windows
Phone UI
Shared PCL
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin

11. Platform-Specific Code
• Some platform-specific services are
inevitable; hide them behind interfaces
Android layer
LocationManager
Android layer
LocationManager
CLLocationManager
Shared PCL
iOS layer
depends on ILocationProvider
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin
iOS layer
CLLocationManager
DI DI

12. Adding an iOS app with shared components
DEMO
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin

13. Even More Code Sharing
• Xamarin.Forms is a cross-platform
XAML-based UI library for simple controls
• MvvmCross is an open source library that
introduces XAML-like data binding and
commands to iOS and Android
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin

14. Using Xamarin.Forms for 100% code sharing
DEMO
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin

15. Decision Making
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin

16. Sasha Goldshtein
blog.sashag.net
@goldshtn
s.sashag.net/sa-xamarin
Thank You!
Join the conversation on Twitter: @SoftArchConf #SA2014
This presentation: http://s.sashag.net/sa-xamarin