Introduction to Xamarin

This presentation was part of a knowledge event for Centric in The Netherlands about Xamarin vs. Cordova. I delivered this presentation to give an introduction to native cross platform app development with Xamarin.

1. Xamarin roy cornelissen Xamarin vs. Cordova Centric Craft Event 13 april 2016
3. Agenda What is Xamarin? Xamarin Platform Code reuse Xamarin Forms Testing Conclusion
4. DRY? Don’t yourself repeat
5. Three app flavors Vendor Hybrid DRY App logic
6. what does Native really mean?
7. Best UX Best performance 100% API access 100% 3rd party API’s
9. App logic Use a shared language DRY App logic C#
10. Xamarin For iOS and Android DRY App logic
11. Visual Studio For Windows DRY App logic
15. How much!?
17. Everybody gets a xamarin!
18. Anything you can do in Objective-C or Java can be done in C# and Visual Studio with Xamarin
19. 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 and runs in the Mono runtime. .NET C# Compile and Link .APK Bindings Runs Natively IL + JIT
21. Language projections for Objective-C and Java Xamarin’s magic trick
22. Cocoa Touch API’s C# bindings C# friendly projections Xamarin’s magic trick
23. Linux Kernel Mono ART Android.* Java.* .NET API Android bindings ACW MCW Xamarin’s magic trick
26. http://bit.ly/mobile-app-performance native web native web
30. patterns for reuse
31. patterns for reuse View ViewModel Model Controller/Services
32. Xamarin.Forms goal: to raise the level of code reuse even further… iOS C# UI Windows C# UI Android C# UI Shared C# Mobile
33. …by abstracting common UI paradigms into a library Xamarin.Forms Shared C# Backend Shared UI Code
35. Page abstractions
36. Layout abstractions
37. control abstractions
38. tinyurl.com/xamarin-forms
39. tinyurl.com/xamarin-forms
40. tinyurl.com/xamarin-forms
41. UILabel TextView LabelRenderer LabelRenderer LabelRenderer Label TextBlock
42. MyEntry Entry MyEntryRenderer_Windows MyEntryRenderer_Android MyEntryRenderer_iOS Xamarin.Platform Windows.EntryRenderer Xamarin.Platform Android.EntryRenderer Xamarin.Platform iOS.EntryRenderer Platform specific Shared code
43. typical PCL
44. Phone 8(.1) SL Phone RT Windows 10 UWP iPhone iPad Phone Tablet PCL / Shared Project Possible targets
46. Challenges Device Fragmentation App Complexity Fast Release Cycles Short Sessions High Mobile User Expectations
47. Beta Tests Manual tests Automated UI tests Automated unit tests
49. App Complexity Thousands of iOS and Android APIs Public web APIs Backend integrations Third party libraries Memory, CPU and network constraints
51. Manual field tests UITest + Test Cloud
53. How dry? Mac iOS Android Windows Phone iCircuit Touch Draw 86% 14% 72% 28% 70% 30% 61% 39% 88% 12% 76% 24% 90% 10%
54. How to stay DRY? Best UX Native Apps 100% API access 100% 3rd party API’s Great productive language C# Free and open source! Code reuse through good architecture
55. @roycornelissen roycornelissen.wordpress.com rcornelissen@xpirit.com meetup.com/Dutch-Mobile-NET-Developers-Group
56. @roycornelissen roycornelissen.wordpress.com rcornelissen@xpirit.com bit.ly/XpiritMagazine