Xamarin enables developers to write native mobile apps in C# that can run on iOS, Android, and other platforms. It allows for sharing of significant code across these platforms while still providing native user interfaces and performance. Developers can leverage existing .NET skills and libraries and write less platform-specific code through approaches like Xamarin.Forms. Xamarin apps can be distributed through standard mobile app stores and access the full APIs of each platform for full feature parity. It aims to improve developer productivity over traditional cross-platform approaches through increased code reuse capabilities.

1. INTRODUCTION TO XAMARIN

2. What is Xamarin?
• Xamarin enables developers to reach all major mobile platforms!
Native User Interface
Native Performance
Shared Code Across Platforms
C# & .NET Framework

3. Silo’d Approach
Build Apps Multiple Times
• Multiple Teams
• Multiple Code Bases
• Different toolsets

4. Write Once,
Run Anywhere
Approach
Lowest
Common
Denominator

5. Xamarin + Xamarin.Forms
With Xamarin.Forms:
more code-sharing, native controls
Traditional Xamarin approach
Shared UI Code

6. Xamarin’s Unique Approach
• Native User Interface
• Native Performance
• Shared code across platforms
• C# & .NET Framework
• Full API Coverage

7. Anything you can do in Objective-C or Java can be
done in C# and Visual Studio with Xamarin!
100% API Coverage

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

9. Emerging Technologies & Devices
Android Wear Google Glass Amazon Fire Phone Amazon Fire TV!

10. Code Sharing: Accelerate Development
Code-sharing stats from iCircuit, built with Xamarin and featured on the App Store.
Source: http://praeclarum.org/post/42378027611/icircuit-code-reuse-part-cinq
• Up to 90% Code Reuse
• Leverage existing libraries
NuGet Support

11. Distribute Everywhere
A Xamarin app is an app, distribute it everywhere

12. 2015 Evaluate Result
• Reuse Code Cross Platform (OK)
• MVVM Pattern （OK）
• Reuse Java Library for Chunghwa’s en/decryption certificate (OK)
• NFC (OK)
• Nuget for “Share Library” version management (OK)

13. Android Design Pattern
• MPV/MVVM Robo Binding: Android MVC Pattern
• Dagger Framework: Dependency injection, information transfer
between intent, dynamic object factory…
• OTTO Framework: Schedule, asynchronous task execution…
• Retrofit Framework: Network communication, URL/Body
manipulation, content processing…
• Android L Framework : Materialize Design
• ……(And you have to consider correspond app architecture of iOS)
All Out of Box in Xamarin/C# Package

14. Q&A
• Version comparison
https://store.xamarin.com/
• Can I continue to use after annual subscription expires?
Yes. License is perpetual. If not to renew, you will no longer have
access to new releases and support.
• Pricing?
$999/year for Business version (per developer,per device
platform)
$ 1798.2 for iOS/Android 1 developer in 1 Year.