Introduction to xamarin
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This document provides an overview of Xamarin and its capabilities for building native mobile apps using C# across iOS, Android, and other platforms. It discusses how Xamarin allows sharing up to 90% of code across platforms while retaining native UIs and performance. Example apps are shown from Rdio and MarketWatch that leveraged large amounts of shared C# code using Xamarin to build their mobile experiences.
![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](https://image.slidesharecdn.com/introductiontoxamarin-140219122812-phpapp02/85/Introduction-to-xamarin-44-320.jpg)
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Introduction to xamarin
- 1. Enabling Developers to Create Native iOS, Android, Mac, & Windows apps in C# Presenter’s Name Presenter’s Contact Presenter’s Website Presenter’s Twitter Handle
- 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
- 4. Silo’d Approach Build Apps Multiple Times • Multiple Teams • Multiple Code Bases • Different toolsets
- 5. Write Once, Run Anywhere Approach • Lowest common denominator • Browser fragmentation Black Box • Developing & designing for 1 platform, happen to get other platforms
- 6. Xamarin’s Unique Approach • Native User Interface • Native Performance • Shared code across platforms • C# & .NET Framework • Full API Coverage
- 7. Why C#?
- 8. C# Is Awesome • LINQ Support • Work With XML Easily XDocument • Event Handling & Delegates
- 9. C# Is Awesome – JSON Made Easy Json.NET offers simple conversions to and from JSON strings and .NET objects, with SerializeObject and DeserializeObject methods.
- 10. See the Difference – Attributed Strings Objective-C C# with Xamarin
- 11. Probing for properties on an AudioFile Objective-C C# with Xamarin
- 12. See the Different – Android ItemClick Java C# with Xamarin C# & Async with Xamarin
- 13. Async/Await Write Beautiful & Maintainable Code
- 14. Why Xamarin?
- 15. Write Everything in C# iOS, Android, Windows, Windows Phone, Mac 2.5+ Billion Devices!
- 16. Xamarin History Over a Decade of Enterprise Production Use 500,000+ Reach 200,000 Developers Developer 100+ Partners Mark 100+ Components 2000 Ximian Founded 2001 2003 2009 2011 Mono Started Ximian Acquired by Novell First iOS product (now Xamarin.iOS) launches 2013 Xamarin Founded 2012 First Xamarin 2.0 release of Xamarin.Mac Component First Store Release of Launch Evolve 2013 Xamarin.Android Partner Program Xamarin Test Cloud Microsoft Partnership
- 17. 100% API Coverage Anything you can do in Objective-C or Java can be done in C# and Visual Studio with Xamarin!
- 18. 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.
- 19. Always Up to Date Always up-to-date with the latest APIs from Apple and Google. Same-day support: • iOS 5 • iOS 6 • iOS 6.1 • iOS 7
- 20. Code Sharing: Accelerate Development • Up to 90% Code Reuse • Leverage existing libraries NuGet Support 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
- 21. Portable Class Libraries • • • 1 Assembly Multiple Platforms Including: • Xamarin.Android • Xamarin.iOS
- 22. Portable Class Libraries Features •Centralized Code Sharing •How you expect it to work •Debug seamlessly into and out of PCL •Project/Assembly Sharing •NuGet
- 23. PCLs – Well Documented
- 24. Microsoft and Xamarin Partner Globally 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
- 25. Distribute Everywhere A Xamarin app is an app, distribute it everywhere
- 26. Products
- 27. Xamarin for Visual Studio Xamarin.iOS Xamarin Studio Xamarin.Android Xamarin Test Cloud Xamarin.Mac Component Store .NET Mobility Scanner
- 28. Development Environment Xamarin Studio PC or Mac Visual Studio Plugin VS 2010/2012/2013
- 29. Visual Studio Integration A single solution: • iOS • Android • Windows Phone • Windows Store Leverage the entire Microsoft ecosystem: • • • ReSharper Team Foundation Server Your favorite code coverage and profiling tools
- 30. Visual Studio Integration Debug to: • Emulators • Devices Integrated into toolbar • • • Status Logs List of devices Just Click Start Debugging!
- 31. Xamarin Studio • Optimized for cross-platform mobile development • Explore native APIs with code completion • World class Android and iOS designers • Powerful debugging on simulator or device
- 32. Android Designer • • Worlds best Android designer Available in: • Xamarin Studio • Visual Studio • Create UI with drag & drop simplicity • Target multiple screen sizes, resolutions and Android versions • Layouts saved in standard Android XML files
- 33. iOS Designer • World’s first iOS Designer available in Xamarin Studio (and soon Visual Studio) • Follows familiar Visual Studio designer idioms • Supports all UIKit elements • Edit custom and 3rd party components • Live preview of changes to properties
- 34. Xamarin Component Store Build Apps Faster • Add high quality pre-built app components directly from Visual Studio and Xamarin Studio • Beautiful cross-platform UI controls, cloud services and enterprise backend integrations are just a few clicks away
- 35. .NET Mobility Scanner How mobile is your .NET? • Scan .exe or .dll to determine compatibility • Generates full report:
- 36. Prebuilt Field Service App App Features: • Location-based assignments / routing • Time recording • Camera capture of work • Signature capture Cross-Platform Techniques • MVVM pattern • Xamarin.Mobile • Signature control from Component Store • SQLite for storage on all 3 platforms
- 37. Prebuilt Employee Directory App Features: • LDAP-ready: easy integration into your corporate directory • Multiple search options • The ability to favorite contacts for easy future access • The ability to call or email right from contact’s listing • Gravatar integration
- 38. DEMO
- 40. #1 Trending on Twitter during keynote Xamarin Evolve 2013 Sold 650 8,400 Out! ! Conference Attendees Live stream hours viewed Watch Sessions & Highlights: http://xamarin.com/evolve/2013
- 42. Automatically test your app on 100s of real devices in the cloud. • Test app at UI level • Takes minutes, not days to get started • Test on hundreds of real devices • Is resilient to visual changes in UI • Has a delightful user interface • App Explorer & Custom Tests
- 43. Rdio Case Study
- 44. 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
- 45. Sharing 50,000 lines of code Challenge • Unable to deliver features on all platforms simultaneously because of multiple, platformspecific code bases • High costs to development 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.
- 46. Sharing 50,000 lines of code “Xamarin offers the best of all worlds. We deliver high performance, native apps that, until Xamarin, were only possible with Objective-C and Java. Sharing over 50,000 lines of code across platforms gives us more time to spend on great user experiences.” Matt Crocker Director of Client Engineering
- 48. From No Mobile Experience to Quick Success About Dow Jones MarketWatch • A Dow Jones property with over 16 million visitors per month • Leading innovator in business news, personal finance, and investment tools and data • Part of the Wall Street Digital Network, which includes WSJ.com, Barrons.com among others
- 49. From No Mobile Experience to Quick Success Challenge: Meet Skyrocketing Mobile Traffic with a Great App • MarketWatch’s high-end users making critical financial decisions demand a fast, easy-to-use app • Web team tasked with building mobile app on tight deadlines, but with no mobile experience • App is very data-intensive - initial attempts with HTML5 couldn’t handle
- 50. From No Mobile Experience to Quick Success Results: • With no mobile experience, team leveraged Visual Studio to create native iOS app in 6 months. • Xamarin app replaced existing HTML5 app for better user experience and performance. • Estimated 90% code-sharing with an Android app that is currently in development.
- 51. Xamarin University • Go Mobile Program Live online training from Xamarin experts Lectures and labs 2 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
- 52. Xamarin Developer Certifications Xamarin skills are increasingly in demand – certifications let the market know you represent top talent
Editor's Notes
- #2: Xamarin Introduction!
- #4: Let’s talk about the state of mobile development today
- #5: Multiple TeamsMultiple Code BasesExpensive & SlowPositive = Great apps delivered to user’s platformNegative = Development hampered by multiple code bases & fragmentation
- #6: Unhappy UsersUnhappy DevelopersIncrease in Abandoned AppsLimited to what is implemented
- #7: UI build natively per platform, leveraging C#C# + XAMLC# + XMLC# + XIBOne shared app logic code base, iOS, Android, Mac, Windows Phone, Windows Store, Windows
- #8: Let’s talk a bit about C# and why it is awesome.
- #9: Statically typed so you avoid a pitfall of errors that afflict other languages.Use LINQ in your Xamarin projects to query, filter and select data from in-memory arrays, or from databases such as SQLite.Parsing XML is easySetting up event handling is a breezeIntellisense, lambdas, etc. are all awesome.
- #10: Use your favorite libraries like Json.NET!
- #11: Here is an example of creating an attributed string.Take advantage of C# features and set properties easily
- #12: Here we are looking for the PacketSizeUpperBound, 1 line of code
- #13: Here we can see how easy it is just to do a += for an event and not have to implement a bunch of listeners every time. Easy to read, string.Format, using args, etc.In fact we can make this call Async/Await by just adding async to the delegate!
- #14: The async and await keywords in C# 5.0 now available to Xamarin developers make asynchronous programming incredibly pleasant. You end up with code that is much more linear and much easier to understand. The compiler does a lot of magic for you which simplifies your code and your life.
- #15: Let’s talk a bit about why you would choose Xamarin as your development platform.
- #16: Take advantage of everything great about C# and now write code that can be shared across all platformsiOSAndroid,MacWindows (WPF, Store, Phone, ASP.NET, etc)
- #17: Full History of Xamarin
- #18: Xamarin offers 100% API coverage on iOS and AndroidIf you want to do something specific on a platform it is all availableNFC, iBeacon, WiFi, Bluetooth, you name it the API is availableXamarin beautiful bindings for every API in Android and iOS
- #19: There is no compromise on performance.Xamarin apps look and feel native because they are native.
- #20: Apple has a developer preview where Xamarin has alphas ready. Google does not offer this. Android versions are usually 4 to 8 weeks out for a stable release, but alphas and betas are usually earlier. Xamarin realizes how important having iOS ready because within 24 hours a large portion of iOS users upgradeAndroid on the other hand is much different. After 4 months on the market Android 4.4 only had 1% adoption
- #21: iCircuit is made by Frank Krueger, a long time Mono & Xamarin developer. Sharing code lead to 70 to 90% code reuse across platforms speeding up developmentReal-time circuit simulator and editor used to design analog and digital circuitshttp://praeclarum.org/post/42378027611/icircuit-code-reuse-part-cinq
- #22: Portable Class Libraries are awesome!You can write all of your C# code in one assembly and share across all platformsBefore the Xamarin & Microsoft Partnership PCLs were limited ONLY to Windows PlatformsNow add official support to create and use PCLs in Visual Studio and Xamarin Sudio
- #23: Centralize all code how you want it to work and share across platformsTake advantage of NuGet to create and use libraries to your projectsEasier to Create and Easier to consume in appsCreate small reusable PCLs to share across all of your projects
- #24: PCLs have amazing documentation on MSDN already.As you can see here the 2nd icon is the “PCL Library” icon which tells you what is availableRemember PCLs are a subset of the .NET library because they are platform independent so not all APIs will be available, for example here: KeyedByTypeCollection<TItem> is not available in PCLOften a NuGet will fill in the gaps, such as PCLStorage for IsolatedStorage across platforms
- #25: Major announcement at the end of 2013:Truly Portable Class LibrariesSupport for VS 2013Special offers for MSDN Subscribers20 City Roadshow!
- #26: Compiles down to APK or IPA that you can distribute anywhere, any store.Or even internal enterprise
- #27: Xamarin offers many products from the core Xamarin.iOS and Xamarin.Android development to tools to speed up development such as the Component Store and .NET Mobility Scanner
- #28: High level vies of all the products that Xamarin currently offers, let’s take a look deeper.
- #29: Xamarin StudioPC -> AndroidMac -> iOS, Android, MacVisual Studio: iOS, Android Windows
- #30: Additionally Supports Visual Studio 2010, 2012, & of course 2013Additionally support desktop apps on Windows: WPF, ASP.NET, Silverlight, WinForms!The same Solution & Projects open in BOTH Xamarin Studio and Visual Studio!
- #31: Connect to Mac build host for iOS developmentShow list of all iOS devices and Simulators to debug onShows all Android devices and emulatorsX86, Arm, Genymotion..Take advantage of all debugging power of VS
- #32: Xamarin Studio is available for Android development on the PC. Xamarin Studio on Mac offers: Android, iOS and Mac developmentWorld Class IDE with great features:Code AnalysisUpload to Test FlightGit & Subversion IntegrationCode CompletionCode NavigationEasy transition from Visual StudioThe same Solution & Projects open in BOTH Xamarin Studio and Visual Studio!
- #33: State of the art features:View different ThemesView different device sizesMulti-view editing!
- #35: Add high quality pre-built app components directly from Visual Studio. Includes dozens of beautiful UI controls and web services – adding a theme or a 3rd party library is just a few clicks awayComplements existing .NET NuGet ecosystemDifferentiator: focus on UI controls and themes – we are making developers better designers across all platforms
- #36: Generates a full report of all method calls to determine compatibility with Xamarin.Android, Xamarin.iOS, Windows Phone, and Windows 8.
- #37: Open source apps, you can download and get started with today
- #38: Technical DetailsTake advantage of the latest cross-platform UI and mobile architecture best practices, including:iPhone, Android, and Windows native user interfacesUses MVVM, shares view-models across platformsSQLite data store with a .NET-based SQLite ORM on all platformsAbility to hook up to your enterprise backend
- #39: Demo time if so desired
- #40: Additional Resources that might be interesting for your group. Includes: Evolve, Test Flight, Case studies, and Xamarin University.
- #41: First conference! Huge successAll sessions and highlights are available to stream online!Great resources
- #42: Save the date now available
- #43: App Explorer - uses one reference device, and runs through all the screens and execution paths. If it dead ends, it starts over. Good for a quick overview of app, but not a replacement for hand-crafted tests.Statistics OS Versions, Devices (sorted by device market share - you can prioritize Crashs vs. Unique crashes# of gestures performedTotal device timeYammerLeft hand window this the tests executed (step by step). On the right hand side you see the devices that the tests were run on. As you scroll through each step, you can see on the right hand side. Drill down on a specific device to see more details.Types of output- Visual Test Results (from screenshots) - "I've never seen my app run on a Kindle Fire - it looks terrible"- Stack Trace and full device log- Performance Data - Peak memory usage - show's memory usage at each step of the app - App Size - Responsiveness - how long does it take the UI thread to respond. Measured in milliseconds, and roughly equates to FPS.
- #45: A consumer music streaming company founded by the guys who founded Skype, 18 million tracks. Millions and millions of users in 17 countries. When we talked to them 3 years ago, they had a problem: three codebases on three platforms, the same app implemented 3 times for iOS, Android and Windows. When they wanted to add a new feature, they had to do it 3x. Now their apps are built on Xamarin and they are sharing >50,000 lines of code on each device, and delivering a gorgeous user experience
- #46: A consumer music streaming company founded by the guys who founded Skype, 18 million tracks. Millions and millions of users in 17 countries. When we talked to them 3 years ago, they had a problem: three codebases on three platforms, the same app implemented 3 times for iOS, Android and Windows. When they wanted to add a new feature, they had to do it 3x. Now their apps are built on Xamarin and they are sharing >50,000 lines of code on each device, and delivering a gorgeous user experience
- #47: Rdio is "the best looking and best implemented of all three mobilemusic apps"
- #50: \
- #52: Xamarin UniversityLearn to build native iOS, Android, and Windows apps with C# in just 30 days.
- #53: Xamarin Certification is held online during Xamarin University and also at Evolve Conference.