WP7, Droid, iPhone, Oh my!

WP7, iPhone, Android Oh my! Modern .NET day Reading 23rd October 2010 Chris Hardy

Chris Hardy • ASPInsider • Mobile is my hobby • http://twitter.com/chrisntr

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Covering... • Windows Phone 7 • MonoTouch • MonoDroid • Code reuse • Porting code • Demos

Windows Phone 7 • Windows Only • Visual Studio 2010 / Expression Blend 4 • Silverlight for Windows Phone... • Great information for developers

MonoTouch • Mac only • MonoDevelop • Apple’s Interface Builder • Superset of Silverlight 3 • Good community around

MonoDroid (currently in preview form) • Cross platform • Visual Studio 2010 / MonoDevelop • XML Files / DroidDraw • Superset of Silverlight 3 • Early days

Windows Phone 7 • Metro • Panorama/Pivot • Launchers/Choosers • Tombstoning

Metro http://crocusgirl.wordpress.com/

Panorama/Pivot

Launchers/Choosers • CameraCaptureTask • EmailAddressChooserTask • MarketplaceHubTask • PhoneCallTask • PhotoChooserTask • SearchTask • SmsComposeTask

Tombstoning sort of multi-tasking

Demo Twitter on Windows Phone 7

Twitter on Windows Phone 7 http://www.youtube.com/watch?v=CZcS5PYG9kw

What is MonoTouch?

What is Mono? The .Net Framework created by Miguel De Icaza et al.

Miguel de Icaza

Mono’s JIT Engine Memory Mono CIL

Apple Rules • Contractual Requirements • No interpreted code • No shared libraries • Kernel Limitations • iPhone OS 2.0+ disables JIT

Mono’s AOT Engine Native Code Mono AOT Mono Runtime CIL ARM

MonoTouch Features • mtouch • MonoDevelop iPhone Add-In • CocoaTouch.NET / monotouch.dll • Full static AOT compiler • Support for all your existing code • Reﬂection • Generics • LINQ • Anonymous Methods • Lambda’s etc...

MonoTouch’s APIs

The Bindings • MonoTouch namespace • MonoTouch.Foo namespace • Maps to CocoaTouch’s Foo Framework • 1:1 Mapping of classes. • MonoTouch.UIKit.UILabel • CocoaTouch’s UIKit framework, UILabel class

Strong Types • Objective-C • Arrays are weakly typed: • NSArray return values. • MonoTouch has strong types • UIView[] Subviews { get; } • vs • NSArray *subviews; • Intellisense - explore the API...

Garbage Collection • Automatic: • Mono’s GC will collect objects on demand • Deterministic: • Use when you need control. • Every object in MonoTouch implements IDisposable using (var image = UIImage.FromFile(“foo.png”)){ surface.DrawImage(image, 20, 20); }

Linker and the application size...

Linking Assemblies

App-store MonoTouch Minimum App Size ~6MB

Integration • Tight integration between MD and IB • IB produces XIBs with MD parses • Automatic class generation in MD • Generates partial classes for all types, outlets and actions deﬁned in Interface Builder

MonoTouch Events • Supports Objective-C pattern: webView.Delegate = new MyWebViewDelegate(); • C# style events as well: webView.PageLoaded += delegate { HideSpinningWheel(); }

Debugging • Console.WriteLine(“Debugging inside of MonoTouch”); • printf(“I made it to this line!n”)

Debugger • MonoTouch debugger leverages Mono’s new Soft-Debugger • Supports the Simulator • Supports the Device... • even over WiFi

Professional iPhone Programming with MonoTouch and .NET/ C# Wallace B. McClure Rory Blyth Martin Bowling Craig Dunn and me... Chris Hardy Out Now!

Demo Twitter on iPhone with MonoTouch

Twitter on iPhone with MonoTouch Will probably do a video in the future :)

What is MonoDroid?

What is MonoDroid? C# on Android

What is MonoDroid? A commercial product

What is MonoDroid? Preview release Not Alpha Not Beta

What is MonoDroid? Cross-platform

What is MonoDroid? Sign-up for preview access http://go-mono.com/monodroid/

Demo Twitter on Android with MonoDroid

Twitter on Android with MonoDroid http://www.youtube.com/watch?v=TKXgugOj56I

Application Stores

Windows Phone 7 $99 Per Year Android $25 Registration iPhone $99 Per Year

Code reuse

Code reuse Json.Net FlickrNet XNATouch

Rebuild your libraries • Can’t just use any DLL • Re-compile for each lib • Each framework has its own class library

Not an abstraction!

Not an abstraction! • Platform speciﬁc APIs • Platform speciﬁc look and feel

Mono for WP7?

Mono for WP7? • Look at Mono code and copy over! • IQueryable support in WP7 • More later...

Porting over Hanselminutes

Porting over Hanselminutes hanselminutesiphone.codeplex.com

Porting over Hanselminutes • Make sure your business logic is separate • Use actions for returning results

Getting XML

Persisting the XML

Isolated Storage vs File Storage

Storing data void SaveLocal(string data) { #if (MonoTouch || MonoDroid) File.WriteAllText(_localPath, data); #elif WINDOWS_PHONE using (var appStorage = IsolatedStorageFile.GetUserStoreForApplication()) { var ﬁle = appStorage.OpenFile(_localPath, FileMode.Create); FileExtension.WriteAllText(ﬁle, data); } #endif }

No File.WriteAllText? No problem!

Implementing File.WriteAllText public static void WriteAllText(IsolatedStorageFileStream ﬁleStream, string data) { using (StreamWriter sw = new StreamWriter(ﬁleStream)) { sw.Write(data); sw.Close(); } } public static void WriteAllText(string path, string contents) { WriteAllText(path, contents, Encoding.UTF8); } public static void WriteAllText(string path, string contents, Encoding encoding) { using (StreamWriter sw = new StreamWriter(path, false, encoding)) { sw.Write(contents); } }

Limited WebClient calls

Downloading a file - MonoTouch _webClient = new WebClient (); _webClient.DownloadFileCompleted += (sender, e) => { _fileDownloaded = true; if (_downloadCompletedSuccessfully) { File.Copy (_show.PartialAudioPath, _show.OfflineAudioPath); } UIHelper.StopInternetActivity (); }; _webClient.DownloadProgressChanged += HandleClientDownloadProgressChanged; _webClient.DownloadFileAsync (new Uri (_show.Url), _show.PartialAudioPath);

Downloading a file WP7 var client = new WebClient(); client.DownloadProgressChanged += (s, e) => { progressBar1.Value = e.ProgressPercentage / 100; }; client.OpenReadCompleted += (s, e) => { using (var isoStore = IsolatedStorageFile.GetUserStoreForApplication()) using (var fs = new IsolatedStorageFileStream(CurrentShow.OfflineAudioPath, FileMode.Create, isoStore)) { int bytesRead; byte[] bytes = new byte[1024 * 1024 * 1]; // 1meg while ((bytesRead = e.Result.Read(bytes, 0, bytes.Length)) != 0) { fs.Write(bytes, 0, bytesRead); } _fileDownloaded = true; fs.Flush(); } }; client.OpenReadAsync(new Uri(CurrentShow.Url, UriKind.Absolute));

Porting your code • MOMA for Mobile?

Conclusions

Thanks! Any questions? twitter.com/chrisntr chrisntr@gmail.com

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WP7, Droid, iPhone, Oh my!

by Chris Hardy on Oct 24, 2010

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WP7, Droid, iPhone, Oh my! — Presentation Transcript