wp7, droid, iphone, oh my!
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WP7, iPhone, AndroidOh my!
Chris Hardy
Modern .NET dayReading 23rd October 2010
Chris Hardy
• ASPInsider
• Mobile is my hobby
• http://twitter.com/chrisntr
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
http://www.youtube.com/watch?v=CZcS5PYG9kw
Twitter on Windows Phone 7
What is MonoTouch?
What is Mono?
The .Net Frameworkcreated by Miguel De Icaza
et al.
Miguel de Icaza
Mono’s JIT Engine
CIL
Mono
Memory
Apple Rules
• Contractual Requirements
• No interpreted code
• No shared libraries
• Kernel Limitations
• iPhone OS 2.0+ disables JIT
Mono’s AOT Engine
CIL
Mono
AOTMono Runtime
ARM
Native Code
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);
}
Linkerand 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. McClureRory Blyth
Martin BowlingCraig 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?
What is MonoDroid?
C# on Android
What is MonoDroid?
A commercial product
What is MonoDroid?
Preview releaseNot AlphaNot 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
iPhone$99 Per Year
Android$25 Registration
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 Storagevs
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 }
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 WP7var 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/chrisntrchrisntr@gmail.com
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