Introduction to xamarin
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Xamarin enables developers to write native mobile apps in C# that can run on iOS, Android, and Windows platforms. It allows code-sharing so the majority of the code can be shared across platforms while maintaining native user interfaces and performance. Key benefits include writing apps once in C# and deploying to over 2.5 billion devices, near 100% API coverage on all platforms, and leveraging Visual Studio and .NET frameworks for development.
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
- 4. Silo’d Approach Build Apps Multiple Times • Multiple Teams • Multiple Code Bases • Different toolsets
- 5. Write Once, Run Anywhere Approach Black Box • Least common denominator • Browser fragmentation • 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. Hybrid Apps - Portable Razor
- 8. Why C#?
- 9. C# Is Awesome • LINQ Support • Work With XML Easily XDocument • Event Handling & Delegates
- 10. C# Is Awesome – JSON Made Easy Json.NET offers simple conversions to and from JSON strings and .NET objects, with SerializeObject and DeserializeObject methods.
- 11. Probing for properties on an AudioFile C# with XamarinC
- 12. See the Different – Android ItemClick C# with XamarinJava
- 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 2000 Ximian Founded 2001 Mono Started 2003 Ximian Acquired by Novell 2009 First iOS product (now Xamarin.iOS) launches 2011 Xamarin Founded First Release of Xamarin.Android 2012 First release of Xamarin.Mac Launch Partner Program 2013 Xamarin 2.0 Component Store Evolve 2013 Xamarin Test Cloud Microsoft Partnership Reach 200,000 Developer Mark 500,000+ Developers 100+ Partners 100+ Components
- 17. Anything you can do in Objective-C or Java can be done in C# and Visual Studio with Xamarin! 100% API Coverage
- 18. 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.
- 19. Always Up to Date Always up-to-date with the latest APIs. Great track record. Shipped same-day support for iOS 5, iOS 6, iOS 6.1, iOS 7 .
- 20. 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
- 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.Mac Xamarin Studio Xamarin Test Cloud Component Store Xamarin.iOS Xamarin.Android Xamarin for Visual Studio .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!
Editor's Notes
- #4: Let’s talk about the state of mobile development today
- #5: Multiple Teams Multiple Code Bases Expensive & Slow Positive = Great apps delivered to user’s platform Negative = Development hampered by multiple code bases & fragmentation
- #6: Unhappy Users Unhappy Developers Increase in Abandoned Apps Limited to what is implemented
- #7: UI build natively per platform, leveraging C# C# + XAML C# + XML C# + XIB One shared app logic code base, iOS, Android, Mac, Windows Phone, Windows Store, Windows
- #9: Let’s talk a bit about C# and why it is awesome.
- #10: 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 easy Setting up event handling is a breeze Intellisense, lambdas, etc. are all awesome.
- #11: Use your favorite libraries like Json.NET!
- #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
- #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 platforms iOS Android, Mac Windows (WPF, Store, Phone, ASP.NET, etc)
- #17: Full History of Xamarin
- #18: Xamarin offers 100% API coverage on iOS and Android If you want to do something specific on a platform it is all available NFC, iBeacon, WiFi, Bluetooth, you name it the API is available Xamarin 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 upgrade Android 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 development Real-time circuit simulator and editor used to design analog and digital circuits http://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 platforms Before the Xamarin & Microsoft Partnership PCLs were limited ONLY to Windows Platforms Now add official support to create and use PCLs in Visual Studio and Xamarin Studio
- #23: Centralize all code how you want it to work and share across platforms Take advantage of NuGet to create and use libraries to your projects Easier to Create and Easier to consume in apps Create 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 available Remember 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 PCL Often 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 Libraries Support for VS 2013 Special offers for MSDN Subscribers 20 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 views of all the products that Xamarin currently offers, let’s take a look deeper.
- #29: Xamarin Studio PC -> Android Mac -> iOS, Android, Mac Visual Studio: iOS, Android Windows
- #30: Additionally Supports Visual Studio 2010, 2012, & of course 2013 Additionally 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 development Show list of all iOS devices and Simulators to debug on Shows all Android devices and emulators X86, Arm, Genymotion.. Take advantage of all debugging power of VS