This document discusses using the Xamarin platform to build Android apps using C#. Key points include: - Xamarin allows developing Android apps using C# and sharing code with other platforms like iOS and Windows. - It works by using Mono and bindings to expose the Android platform in C# and allow calling Java libraries. The compiler produces IL that runs natively on Android. - Developers can use Xamarin Studio or Visual Studio and the apps have native performance since they run natively on Android.

1. Craig Dunn
Developer Evangelist
Xamarin
craig@xamarin.com
@conceptdev
Android with C#
using Xamarin

2. Why Xamarin.Android?
aka Why Are You Here?
• Write C# apps for Android phones & tablets
• Share C# with other platforms:
Xamarin.iOS
Windows Phone
Windows Store Apps
re-use C# from existing projects
• Create native Android user interface
• Native runtime == native performance
• Use Java libraries (if required)

3. How Does it Work?
• Mono
C# + .NET implementation for Linux
started in 2001/released 2004
perfect fit for today’s mobile platforms: iOS & Android
• “Bindings”
exposes Android as C#
you can write your own to incorporate any Java
• Compiler
produces IL and ships a native runtime to execute it
can link out unused code

4. How Does it Work?

5. Xamarin Installer
• Simple unified installer
http://xamarin.com/download
installs Android SDK for you
• Register with Google to deploy on Play
(but you can deploy directly too)
http://play.google.com/apps/publish

6. Development Environment Support
Mac OS X
IDE
iOS
Android
Windows Phone
Windows
+
Xamarin
Business
Edition
+
Mac

7. Android Development Environment
Visual Studio
Xamarin Studio

8. Android UI Designer
Visual Studio
Xamarin Studio

9. Android Development Environment
Linking reduces size
Choose CPU arch
Shared runtime for
debugging only.

10. Android Development Environment
• AndroidManifest.xml
Permissions
App configuration
use [Activity] and
other attributes

11. Android Development Environment
• Deployment
Signing wizard

12. DEMO

13. DEMO

14. RESULT

15. SHARE
Components
Code
‘Structure’
Design

16. SHARE

17. Recap
•
•
•
•
•
•
Build Android apps in C# with .NET
Use Xamarin Studio or Visual Studio
Apps have native look and feel
Apps run natively, with native performance
Share code
Component Store
http://components.xamarin.com

18. What’s Next?
•
•
•
•
async/await
F#
Portable Class Libraries (PCL)
Google Play Services
In app purchasing
Location services
Maps v2
• Google Support Lib
Drawer Navigation + more!

19. What’s Next?
async/await

20. Go!
• 10 minute guide to building an app
http://xamarin.com/getting-started
• Docs, Recipes
http://docs.xamarin.com/
• Forums
http://forums.xamarin.com
• Samples
http://github.com/xamarin
http://xamarin.com/download

21. Q&A

22. Craig Dunn
Developer Evangelist
Xamarin
craig@xamarin.com
@conceptdev
THANK YOU