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![@implementationMSViewController -(void)viewDidLoad { [superviewDidLoad]; } -(IBAction)OnButtonDown:(id)sender { UIAlertView* view = [[UIAlertViewalloc]init]; [view setTitle:@"Hello World"]; [view setMessage:@"How are you?”]; [view addButtonWithTitle:@"OK"]; [view show]; } @end publicpartialclassiOSAppViewController: UIViewController { publiciOSAppViewController(IntPtrhandle) : base(handle){ } publicoverridevoidViewDidLoad(){ base.ViewDidLoad(); } partialvoidOnButtonDown(UIButtonsender) { UIAlertViewview = newUIAlertView(); view.Title= "Hello World"; view.Message= "How are you? "; view.AddButton("OK"); view.Show(); } } iOS](https://image.slidesharecdn.com/jaimerodriguez-141019175046-conversion-gate01/75/Tips-tricks-for-sharing-C-code-on-iOS-Android-and-Windows-Phone-by-Jaime-Rodriguez-15-2048.jpg)
![public class MyActivityextends Activity { @Override public void onCreate(Bundle savedInstanceState) { Button myBtn= (Button) this.findViewById( R.id.clickMe); myBtn.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View view) { AlertDialog.Builderbuilder = new AlertDialog.Builder(MyActivity.this) ; builder.setTitle( "Hello World") .setMessage("How are you?") .setPositiveButton( "OK", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterfacedialogInterface, inti) { dialogInterface.dismiss(); }}) .show(); }}); } } [Activity(Label = "AndroidApp", MainLauncher= true, Icon = "@drawable/icon")] publicclassMainActivity: Activity { protectedoverridevoidOnCreate(Bundlebundle) { base.OnCreate(bundle); SetContentView(Resource.Layout.Main); Buttonbutton= FindViewById<Button> (Resource.Id.me); button.Click+= delegate{ AlertDialog.Builderbuilder = newAlertDialog.Builder(this); AlertDialogdialog = null; builder.SetTitle( "Hello World") .SetMessage( "How are you") .SetPositiveButton( "OK", delegate{ dialog.Dismiss(); } ); dialog = builder.Show(); } ; } } Android](https://image.slidesharecdn.com/jaimerodriguez-141019175046-conversion-gate01/75/Tips-tricks-for-sharing-C-code-on-iOS-Android-and-Windows-Phone-by-Jaime-Rodriguez-16-2048.jpg)
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Tips & tricks for sharing C# code on iOS, Android and Windows Phone by Jaime Rodriguez
This document summarizes a presentation about building mobile apps for Windows Phone, iOS, and Android using C#. The presentation discusses using C# with the .NET Base Class Library and platform-specific APIs for each mobile platform. It also covers strategies for sharing code between platforms like Portable Class Libraries, Shared Projects, and Xamarin.Forms. The presenter advocates that Xamarin allows building truly native mobile apps while taking advantage of C# and .NET.
Tips & tricks for sharing C# code on iOS, Android and Windows Phone by Jaime Rodriguez
- 1. Building Windows phone,iOS and Android apps with C# Jaime Rodriguez Principal Evangelist, Microsoft
- 2. About meWhy thistalk…. 90s 2000 2005 2008-Today Primitives Productivity UX Mobile Disclaimer
- 3. About meWhy thistalk…. 90s 2000 2005 2008-Today Primitives Productivity UX Mobile Disclaimer I do not work for Xamarin Opinions are my own, not those of my day-job employer This space evolves very fast
- 4. Mobile Explosion Consumersare already mobile-first Business users are increasingly demanding mobile scenarios
- 5. How? #1 –Web Build a Mobile Website
- 6. How? #2 –HybridWeb Put a Web App In the Store Native App Mobile Website
- 7. How? #3 –ClonedNative Build App Multiple Times
- 8. How? #4 –SharedNative Shared UI Code Build Natively and Share Code
- 9. Why Native? Xamarinapps look and feel native because they are native Native User Interfaces Native API Access Native Performance
- 10. Start with C#and BCL
- 11. … add WindowsAPIs100% coverage
- 12. … or iOSAPIs100% coverage
- 13. … or AndroidAPIs100% coverage
- 14. demo Xamarin Developmentwith Visual Studio
- 15. @implementationMSViewController -(void)viewDidLoad { [superviewDidLoad]; } -(IBAction)OnButtonDown:(id)sender { UIAlertView* view = [[UIAlertViewalloc]init]; [view setTitle:@"Hello World"]; [view setMessage:@"How are you?”]; [view addButtonWithTitle:@"OK"]; [view show]; } @end publicpartialclassiOSAppViewController: UIViewController { publiciOSAppViewController(IntPtrhandle) : base(handle){ } publicoverridevoidViewDidLoad(){ base.ViewDidLoad(); } partialvoidOnButtonDown(UIButtonsender) { UIAlertViewview = newUIAlertView(); view.Title= "Hello World"; view.Message= "How are you? "; view.AddButton("OK"); view.Show(); } } iOS
- 16. public class MyActivityextendsActivity { @Override public void onCreate(Bundle savedInstanceState) { Button myBtn= (Button) this.findViewById( R.id.clickMe); myBtn.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View view) { AlertDialog.Builderbuilder = new AlertDialog.Builder(MyActivity.this) ; builder.setTitle( "Hello World") .setMessage("How are you?") .setPositiveButton( "OK", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterfacedialogInterface, inti) { dialogInterface.dismiss(); }}) .show(); }}); } } [Activity(Label = "AndroidApp", MainLauncher= true, Icon = "@drawable/icon")] publicclassMainActivity: Activity { protectedoverridevoidOnCreate(Bundlebundle) { base.OnCreate(bundle); SetContentView(Resource.Layout.Main); Buttonbutton= FindViewById<Button> (Resource.Id.me); button.Click+= delegate{ AlertDialog.Builderbuilder = newAlertDialog.Builder(this); AlertDialogdialog = null; builder.SetTitle( "Hello World") .SetMessage( "How are you") .SetPositiveButton( "OK", delegate{ dialog.Dismiss(); } ); dialog = builder.Show(); } ; } } Android
- 17. Anything you cando in Objective-C or Java can be done in C# with Xamarin using Visual Studio
- 18. Native Performance Xamarin.iOSdoesfull Ahead Of Time (AOT) compilation to produce an ARM binary for Apple’s App Store. Xamarin.Androidtakes advantage of Just In Time (JIT) compilation on the Android device.
- 19. So far… UsingC# BCL on iOS, Android and Windows Phone apps C# Bindings to iOS/Android Great tooling Editors Debugging Extensibility Potentially cumbersome code sharing as you write platform specific code ?
- 20.
- 21. Linked Files Compiler Directives
- 22.
- 23. Share Code: PortableClass Libraries
- 24.
- 25.
- 26. UI: Xamarin+ Xamarin.Forms With Xamarin.Forms: more code-sharing, native controls Traditional Xamarin approach Shared UI Code
- 27. 40+ Pages, Layouts,and Controls Build from code behind or XAML Two-way Data Binding Navigation Animation API Dependency Service Messaging Center UI: Xamarin.Forms Shared UI Code
- 28. Layouts Stack Absolute Relative Grid ContentView ScrollView Frame
- 29. Controls ActivityIndicator BoxView Button DatePicker Editor Entry Image Label ListView Map OpenGLView Picker ProgressBar SearchBar Slider Stepper TableView TimePicker WebView EntryCell ImageCell SwitchCell TextCell ViewCell
- 30. Xamarin Forms Mark-up(XAML 2009 spec) Data binding & Data Templates Markup Extensions Resources Dictionaries
- 31. Xamarin Forms PlatformFeatures Page.DisplayAlert UI Thread marshalling Timers Xamarin.Forms.Maps Platform code via OnPlatform<T> and DependencyService.Get<T>
- 32. demo Hacking awaywith Xamarinand Visual Studio
- 33. Tips & TricksPersonal Observations & Lessons learned
- 34. Ramp-up & Mastery To be successful using C# on iOS, Android, and Windows Phone, you still have to know how to code for these platforms
- 35. How I learnednative…
- 36. How I learnedXamarin…
- 37. Sharing code… whatshould you use? a)PCL b)Shared Projects c)partial classes d)C# extensions e)All of the above
- 38. UI Patterns &Tips Separate your concerns Declarative XAML MVVM is not required Use OnPlatform<T> for platform specific code Use ContentPage+ layout panels for dynamic resolution
- 39. Connect to thecloud: Microsoft Azure http://azure.microsoft.com/en-us/documentation/services/mobile-services/
- 40. Memory & GarbageCollection iOS Uses AOT (Ahead of Time) compiler Two GCs: default (Boehm) or Sgen Android Uses SgenGC Windows Phone Uses .NET GC, http://developer.xamarin.com/guides/cross-platform/application_fundamentals/memory_perf_best_practices/ http://msdn.microsoft.com/en-us/library/ms973837.aspx
- 41. Performance Is usuallynot a problem Use native tools to measure iOS: Instruments Android: Device Monitor’s Allocation Manager Windows Phone: Visual Studio, Windows Phone Power tools, Graphics Diagnostics
- 42.
- 43. Closing: Mobile appdevelopment with C# Familiar Productive Highly reusable Empowering Built on a solid and extensible foundation
- 44.
- 45. Want to wina free Xamarin license? 1.Download free version of Xamarin Studio … 2.Create a small Hello World Project on at least two of the three platforms: Windows Phone, Android, iOS. 3.Tweet a link to your project to @jaimerodriguez before October 10that noon PST 4.One random submission will be selected….and a coupon for free license will be emailed
- 46. Gracias!!! Aquiestoylos tresdias! @jaimerodriguez jaimer@microsoft.com