Cross-Platform Mobile Development using Visual Studio and Xamarin

Cross-Platform Mobile Development using Visual Studio and Xamarin

Transcript

1. Cross-Platform Mobile Development using Visual Studio and Xamarin
2. Shravan Kumar Kasagoni Senior Developer - RealPage Microsoft MVP – VSDT Microsoft User Group Hyderabad @techieshravan
7. Approaches for device development Native Hybrid Tool maturity Device optimized experience Updatability Portability across devices
9. Black Box CSS | HTML JavaScript | TypeScript
10. Native mobile apps are better… - Performance - Richness of UI
12. Using the platform’s native tools (Siloed approaches are long term problems) Xcode ADT Visual Studio End user experience Better productivity and global developer experience ✗ Building native apps multiple times when targeting multiple platforms! …very expensive, not sustainable… + + -
13. C# and Xamarin to the rescue!
14. How?
15. Mono Framework
16. What is Mono? • Open source implementation of the .NET platform created by Ximian (ECMA 334/335) • 2001: Created to bring Windows applications to Linux • 2003: Acquired by Novell with Ximian • Matured at Novell in research mode; now a world-class runtime.
17. Bringing .NET to Linux Windows Linux Microsoft .NET .NET Apps Mono/.NET Core .NET Apps
18. .NET on Android, iOS Linux Mono iOS Mono Touch Android Mono for Android iOS Xamarin.iOS Android Xamarin.Andriod
19. Xamarin • Founded in May 2011 • Xamarin has a perpetual license to all Mono IP: Copyrights, patents and trademarks • Focused on mobile app development
20. Bringing .NET to Android Android Kernel Mono Runtime .NET APIs Apps Android Bindings Dalvik Runtime/ART android.* java.* MCW ACW
21. Bringing .NET to iOS iOS Mono Runtime NO RUNTIMES ALLOWED
22. Bringing .NET to iOS iOS App .NET APIS iOS Bindings Application Code
24. Microsoft supports your choice Desktop apps Universal Windows apps Browser-based applications
25. Xamarin and Visual Studio
26. Black Box C# in Xamarin + Visual Studio iPhone native (C# and XIB) Android native (C# and AXML) Windows Store (C# and XAML) Native apps and cross-platform UI (C# and Xamarin.Forms) Cross-platform with C#
27. C# + XIB C# + AXML C# + XAML iPhone Android Windows
28. Xamarin.iOS does full ahead-of-time (AOT) compilation to produce an ARM binary suitable for Apple’s App Store Xamarin.Android takes advantage of just-in-time (JIT) compilation on the Android device Native cross-platform apps with Xamarin Native compilation, native performance
29. C# unique approach powered by .NET and Xamarin The best of both worlds (UX & TCO) Great native apps delivered to the user’s choice of device Development agility, with Visual Studio to move at mobile speed
30. Xamarin designer for Android apps Xamarin designer for iOS apps
31. Windows APIs 100% coverage with .NET
32. iOS APIs 100% coverage with Xamarin
33. Android APIs 100% coverage with Xamarin
34. Maximizing code reuse across platforms Views How to display information View models What information to display Flow of interaction Models Data objects Business logic Etc. Model View Model View Device-specific Portable code References Databinds Implemented in PCL or shared project
35. Demo Xamarin + C# + Visual Studio
36. Sharing code
37. Sharing code One of the main reasons to use Xamarin is the possibility of sharing a significant portion of your code across all your supported platforms
38. Sharable Code Xamarin applications are native and therefore will always include some platform-specific code 30% 70% iOS 14% 86% Android 15% 86% Windows Phone Platform Specific Cross Platform
39. Where can I use shared code? Anytime you are writing code which does not depend on a specific platform feature, it is potentially sharable, particularly if it: • Talks to a web service • Parses a data format • Uses a database • Performs processing or logic Create shared classes + methods and then use them from your platform- specific code to maximize the shareable surface area
40. Where can I use shared code? Data Access (Database) • SQLite support available for iOS, Android and Windows • Can also store in the cloud – Azure Mobile Services, Amazon, Dropbox, etc. Web Services • Use HttpClient for REST services Xamarin.* Libraries • Xamarin.Social • Xamarin.Auth • Xamarin.Mobile Open-Source, Cross-Platform APIs available from Github.com/Xamarin
41. When is code not sharable? If the code you are writing depends on device or platform-specific APIs, or APIs not available in your project, then you will need to isolate it's use or provide some kind of abstraction to use it from your shared code • Access system information • Use files and folders on the device • Access personal information • Use external devices
42. Xamarin Component Store Can also get reusable components from the Xamarin Component Store which is accessible through the Components folder in each project
43. Available project types There are two project styles available for sharing code – which one you select has an impact on how and what kind of code is shared Shared Project Portable Class Library
44. Demo Shared Projects
45. Demo Portable Class Library
46. Thank You