20140207 xamarin-red fabriq-microsoft-techdays-nativemobileappdevelopmentwithxamari-nv1.4

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Code/Développement
Native Mobile App Development
for iOS, Android and Windows
in C# and Visual Studio
Erik POLZIN - Sr. Partner Manager
XAMARIN
Erik.polzin@xamarin.com - www.xamarin.com
Zaak CHALAL - CEO
RedFabriQ
Zaak.chalal@redfabriq.com - www.redfabriq.com

THE PLATFORM FOR THE
MOBILE ENTERPRISE
In partnership with

OVERVIEW

Smartphone adoption is happening

Enterprises are going mobile
on multiple platforms

Sweet spot for the successful mobile enterprise
+
+
-

NATIVE MOBILE APPS
STRATEGY CHOICES

The Siloed approach: Build native apps multiple times

Objective C
+ XIB
Java + XML C# + XAML
Native UI Native UI Native UI
Optional Remote Services
(ASP.NETWeb API
or any servertechnology)
Siloed approach
Build native apps multiple times means:
• Client development is completely
different for each device type
• Only the Services (server-side) can be
re-used, with certain differences when
consuming them
• TCO grows exponentially

The Siloed approach: Build native apps multiple times
+
+
-
✗

The write-once-run-anywhere approach
Black Box
HTML Hybrid
scenarios
(Semi-native apps)
like PhoneGap

The write-once-run-anywhere approach
✗

C# + XIB C# + XML C# + XAML
(ASP.NETWeb API
C# unique approach
powered by Xamarin and Microsoft .NET
Fully native apps written
entirely in C#
Xamarin exposes 100% of
iOS and Android APIs in C#
Mobilize existing code, skills,
and tools including Visual Studio
Share app logic code across
device platforms

ANYTHING YOU CAN DO
IN OBJECTIVE-C OR JAVA
CAN BE DONE IN C#
WITH XAMARIN

SHARING CODE
ACROSS
WINDOWS, IOS AND ANDROID
ACCELERATES DEVELOPMENT

C# and Xamarin’s unique approach

THE XAMARIN PLATFORM

Xamarin’s enterprise success

Native compilation, native performance

• A single solution for iOS,
Android,
and Windows development
• Leverage the entire
Microsoft ecosystem:
• Team Foundation Server (TFS)
• ReSharper
• Your favorite code coverage
and profiling tools
Visual Studio 2013 integration for iOS & Android

UI design in Visual Studio
• Create UI with drag and
drop simplicity
• Target multiple screen sizes,
resolutions, and OS versions
• Layouts saved in native
resource formats
• Worlds best Android designer
available in Visual Studio
• iOS coming soon

Xamarin Component Store
Build apps faster
Add high quality pre-build app
components directly from Visual Studio
Beautiful cross-platform UI controls,
could services, and enterprise backend
integrations are just a few clicks away

Accelerate development with code sharing
Code sharing statistics from production Xamarin app:

“With Xamarin, developers combine all of the
productivity benefits of C#, Visual Studio 2013
and Windows Azure with the flexibility to quickly
build for multiple device targets.”
S. Somasegar, Corporate Vice President,
Microsoft
Technical collaboration for superior developer experience
Exclusive MSDN offers that accelerate the transition to mobile
development
Microsoft and Xamarin Partner Globally

CASE STUDIES

Sharing 50,000 lines of code
About Rdio
Rdio is the leading music streaming and sharing
service started by the founders of Skype
Rdio is already in 30 countries with over
20 million songs
Available in 31 countries
“Rdio’s mobile app is also the best looking
and best implemented of the three [music
streaming apps reviewed].” Wired Magazine

Challenge
Unable to deliver features on all platforms
simultaneously because of multiple,
platform-specific code bases
High costs to develop and maintain apps
Results
Using Xamarin, Rdio now shares over 50,000
lines of C# across iOS, Android, and Windows,
enabling them to focus on feature-parity and
user experience

IMPLEMENTATION

Which device to target ?
Really, do you have a choice?

Architecture reminder
C# + XIB C# + XML C# + XAML
(ASP.NETWeb API
SDK : Wrapper + Compiler

Application life cycle
Visual Studio and TFS
Target
UI
Design
Code &
Share
Unit
Testing
Xamarin
Test
cloud
iOSAndroidXAMARIN
Project architecture & methodologies
Deploy
Windows Store
iTunesGoogle Play, …

Design UI
Use Visual Studio to design Android UI 

Project organization and code sharing
Code sharing
 Pragma
 File Links
 PCL
 Partial class
 Inheritance

Understand the « Binding » : Simple sample with button control
Under IOS 
Under Android 

Compiler
Native compilation
Xamarin's compiler is smart - so
smart that it can produces exactly
the right output for each platform.
Xamarin.iOS does full Ahead-of-
Time (AOT) compilation to
produce an ARM binary suitable
for Apple's App Store, while
Xamarin.Android takes advantage
of Just In Time compilation right
on the Android device. Your
shared code never needs to know
the difference!

FIELD SERVICE
https://github.com/xamarin/prebuilt-apps

iOS and Android limitations
• Two compiling way = two contexts DotNet runtime limitations under iOS and Android
• Android, Apple limitations
• IOS, Example: Dynamic code generation is forbidden by Apple. So no VM.
• The "DLR" can not be used (cannot use Reflection.System.Emit, …)
• For more information about limitations please read :
– Android : http://docs.xamarin.com/guides/android/advanced_topics/limitations/offline.pdf
– iOS : http://docs.xamarin.com/guides/ios/advanced_topics/limitations/offline.pdf

Recommendations
• Engineered for code sharing
– PCL to isolate your business logic
– Partial class (example on your ViewModel)
– Pragma (The preprocessors directives)
– Controls / components
– …
• Architecture and methodologies
– Organize and normalize your solutions
– Git with TFS
– Framework IOC like OpenNetCF ioc / tinyioc
– Framework MVVM like mvvmcross
– Database : SQLite / NoSQL
– TEST, TEST and TEST : Test units (Andr.Unit, Touch.Unit),
Xamarin Test Cloud,
– …
• Develop your components and Framework
• Components on XAMARIN STORE

ENTERPRISE GRADE CAPABILITIES

Go Mobile program
Live online training from Xamarin experts
Lectures and labs
Two coaching sessions where you meet one
on one with expert Xamarin mobile developers
What you’ll learn
iOS and Android fundamentals
Mobile app lifecycle
Native UI and controls
Cross-platform architecture
Mobile best practices
Secure backend integration
Xamarin University

Xamarin developer certifications
Xamarin skills are increasingly in demand
certifications let the market know that you represent top
Xamarin talent

Xamarin global support
For small business and individuals
Email support
Xamarin-managed forums
Available to all
The Xamarin developer center
150+ guides and tutorials
250+ sample apps
Release notes, videos, and much more
Evolve 2013 videos
50 sessions covering enterprise mobility
and cross-platform best practices

NEXT STEPS

MSDN subscriber offers

20140207 xamarin-red fabriq-microsoft-techdays-nativemobileappdevelopmentwithxamari-nv1.4

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