state of union: xamarin & cross-platform .net in 2016 and beyond
TRANSCRIPT
Nick LandrySenior Technical Evangelist – Microsoft
Blog: AgeofMobility.com
@ActiveNick | github.com/ActiveNick
State of Union:
Xamarin & Cross-Platform .NET
in 2016 and Beyond
Agenda
Silo Approach
iOS WindowsAndroid
Objective-C
Xcode
C#
Visual Studio
Java
Android Studio
No shared code • Many languages & development environments • Multiple teams
Write Once, Run Anywhere
App Generator
Lua
Javascript
Actionscript
HTML+CSS
Limited native API access • Slow performance • Poor user experience
Xamarin’s Unique Approach
Shared C# codebase • 100% native API access • High performance
iOS C# UI Windows C# UIAndroid C# UI
Shared C# Logic
C# and Xamarin’s unique approachThe best of all worlds
2016: A Great Year for Xamarin Developers!
Xamarin is included
in Visual Studio
How Xamarin Works
Windows APIs
Microsoft.Phone Microsoft.Networking Windows.Storage Windows.Foundation Microsoft.Devices
System.Data System.Windows System.Numerics System.Core System.ServiceModel
System.Net System System.IO System.Linq System.Xml
iOS – 100% API Coverage
MapKit UIKit iBeacon CoreGraphics CoreMotion
System.Data System.Windows System.Numerics System.Core System.ServiceModel
System.Net System System.IO System.Linq System.Xml
Android – 100% API Coverage
Text-to-speech ActionBar Printing Framework Renderscript NFC
System.Data System.Windows System.Numerics System.Core System.ServiceModel
System.Net System System.IO System.Linq System.Xml
All 3 characteristics are required for a truly native app
Xamarin is native in all 3 ways
Native User Interface
Apps are built with standard, native
user interface controls for easy and
familiar interactions
Apps have access to the full spectrum of
functionality exposed by the underlying
platform and device
Apps leverage platform-specific hardware
acceleration, and are compiled as native
binaries, not interpreted at runtime.
High-fidelity API Access
Native Performance
Native Performance
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.
Same-day support:• iOS 5• iOS 6• iOS 7• iOS 8• iOS 9
✓Always Up-to-DateFull support for:• Apple Watch• Apple TV• Android Wear• Amazon Fire TV• and much more
Visual Studio
Xamarin.com/Download
Visual Studio Integration
New Light & Dark Themes in Xamarin Studio
Xamarin Studio - Sharable Components
Demo:
Tour of the Xamarin
Developer Experience
Xamarin exposes 100% of the native APIs
for iOS, Android and Windows
Anything you can do in Objective-C, Swift, or Java
can be done in C# with Xamarin using Visual Studio
Cross-Platform .NET:How did we get here?How can we make it better?
Browser Phone
Meet Xamarin.Forms
Xamarin + Xamarin.FormsWith Xamarin.Forms:
more code-sharing, native controls“Classic” Xamarin approach
Shared UI Code
<?xml version="1.0" encoding="UTF-8"?>
<TabbedPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"x:Class="MyApp.MainPage">
<TabbedPage.Children>
<ContentPage Title="Profile" Icon="Profile.png">
<StackLayout Spacing="20" Padding="20"
VerticalOptions="Center">
<Entry Placeholder="Username"
Text="{Binding Username}"/>
<Entry Placeholder="Password"
Text="{Binding Password}"
IsPassword="true"/>
<Button Text="Login" TextColor="White"
BackgroundColor="#77D065"
Command="{Binding LoginCommand}"/>
</StackLayout>
</ContentPage>
<ContentPage Title="Settings" Icon="Settings.png">
<!-- Settings -->
</ContentPage>
</TabbedPage.Children>
Native UI from shared code
Xamarin.Forms: Build Native User InterfacesUsing Shared Code
Shared App Logic in C#
Xamarin.Forms comes with over 40
common controls, pages and layouts to
make app UI creation fast and easy
Even basic animations are supported
Xamarin.Forms is Fully Extensible:
• Subclass included controls and
customize behavior
• Define and add your own controls,
layouts, pages and cells
• Expose your own platform-specific
controls in Xamarin.Forms pages
Xamarin.Forms is open source too!
• Multi-Touch Enabled
• Pressure Sensitive
• Super Fast
• Rotate, screenshots,location changes
• Never leave Visual Studio
NEW! Visual Studio iOS Simulator Remoting
Xamarin.Forms XAML Previewer
Demo:
Sharing UI Code with
Xamarin.Forms
Use Decide Screen-by-Screen
Xamarin.Forms is great for forms-based
screens. You can mix Xamarin.Forms with
the full power of Xamarin.iOS and
Xamarin.Android in the same app for
complete control over your app’s look and
feel.
Xamarin.Forms: Mix-and-Match Screen-by-Screen, Element-by-Element
Call Platform APIs via Shared Services
Need platform-specifc functionality within a
Xamarin.Forms page, such as querying the
accelerometer? We’ve included services that
quickly and easily abstract platform-specific
API calls to keep you writing as much shared
code as possible.
Embed Custom Views Anywhere
Not only are Xamarin.Forms pages
mixable with custom screens, you can
embed custom views built directly
against Xamarin.iOS and
Xamarin.Android into Xamarin.Forms
pages.
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Roadmap
XAML Compilation
Parsed and inflated
Parsed & turned into IL
•
XAML Compilation Usage
[XamlCompilation(XamlCompilationOptions.Compile)]
[XamlCompilation(XamlCompilationOptions.Skip)]
[assembly: XamlCompilation(XamlCompilationOptions.Compile)]
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XAML Compilation Benefits
Xamarin.Forms Ecosystem
https://evolve.xamarin.com/session/56e205b0bad314273ca4d817
https://medium.com/@harrycheung/mobile-app-performance-redux-e512be94f976#.glqa5cmx6
Xamarin.Forms Performance
Sharing Code
Shared Projects
1 Assembly
Multiple Platforms
Including:
Xamarin.iOS and Xamarin.Android
Portable Class Libraries
NuGet
Choosing a Code Sharing Option
Demo:
Sharing Code with PCLs
Sharing Code Beyond
PCLs and .NET Standard:Lighting-up Platform-Specific Code
Complementing .NET
PlatformSpecific Code
What if we didn’t have to write this code?
What if we could access it from shared code?
UI+APIs UI + APIsUI + APIs
Battery
GPS
Lights
Notifications
Settings
Text To Speech
Battery
GPS
Lights
Notifications
Settings
Text To Speech
Battery
GPS
Lights
Notifications
Settings
Text To Speech
Xamarin Components and Plugins
https://github.com/xamarin/XamarinComponents
https://components.xamarin.com
TextToSpeech
Speak(“Hello World”);
AVSpeechSynthesizer SpeechSynthesizer
Plugins for Xamarin
Common API
Sharing Code Beyond PCLs & .NET Standard
Sharing Code Beyond PCLs & .NET Standard
Demo:
Plugins for Xamarin &
Windows
More New Stuff
Skia Sharp - 2D Graphics Library
Xamarin Workbooks – Interactive C#
Xamarin Profiler
Xamarin Profiler – Cycle Detection
Fall Themes
Watch dotNetConf 2016for more on Xamarin, .NET, .Net Core, ASP.NET, Open Source, the Future, etc.
http://www.dotnetconf.net/
Summary
github.com/ActiveNick/MyWeather
github.com/ActiveNick/MyWeatherNUI
github.com/jamesmontemagno/MyWeather.Forms
github.com/xamarin/xamarin-forms-samples
github.com/xamarin/mini-hacks
github.com/xamarin
https://github.com/jamesmontemagno
http://motzcod.es
Session Demos & Xamarin Videos
https://aka.ms/xamebook
https://aka.ms/xamebook/epub
https://aka.ms/xamebook/mobi
Free Xamarin.Forms eBook
https://blog.xamarin.com/performing-ocr-for-ios-android-and-windows-with-microsoft-cognitive-services/
https://github.com/pierceboggan/smarter-apps/tree/master/ExpenseIt/
https://blog.xamarin.com/adding-facial-recognition-to-your-mobile-apps/
https://github.com/pierceboggan/smarter-apps/tree/master/talk/employee-directory/
https://github.com/xamarin/mini-hacks/tree/master/microsoft-cognitive-services/solutions
Demo: Xamarin + Cognitive Services
https://github.com/DotNetToscana/See4Me
https://github.com/ActiveNick/BingTranslateDemo
Demo: Xamarin + Cognitive Services
http://xamarin.com/download
http://docs.xamarin.com
http://evolve.Xamarin.com
http://xamarin.com/university
http://blog.xamarin.com
http://motzcod.es
http://weblogs.asp.net/wallym
http://www.gregshackles.com
Xamarin Resources
Online Microsoft training delivered by experts to help technologists continually learn
Hundreds of courses for developers, IT Pros, students, entrepreneurs and enthusiasts
11 different languages
More than 2.1M students registered
Build your own Learning Plan
All free!
Cross-Platform Development withXamarin & Visual Studio
aka.ms/MVAxamarin
http://www.microsoftvirtualacademy.com
Thank You!
Slides are posted SlideShare. Demos are on GitHub.
Slideshare: www.slideshare.net/ActiveNick
Blog: www.AgeofMobility.com
Twitter: @ActiveNick
Mobile Apps: www.bigbaldapps.com
LinkedIn: www.linkedin.com/in/activenick
GitHub: github.com/ActiveNick
Email: [email protected]