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Cross-Platform Mobile Development with C# (MonkeySpace 2012)
Greg Shackles
October 18, 2012
Programming
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1.6k
Cross-Platform Mobile Development with C# (MonkeySpace 2012)
Greg Shackles
October 18, 2012
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Transcript
Greg Shackles Cross-platform mobile development with c#
About Me Greg Shackles Senior Software Engineer OLO Online Ordering
email greg@gregshackles.com twitter @gshackles github github.com/gshackles blog gregshackles.com Slides speakerdeck.com/u/gshackles
nycmobiledev.net @NYCMobileDev
the Book oreil.ly/Lp5smR Discount Code: AUTHD Print Book: 40% Off
E-Book: 50% Off
Market Share (US): August 2012 Google Apple RIM Microsoft Symbian
52.6% Android 34.3% Apple 8.3% RIM 3.6% Microsoft Source: comScore
native platform Languages Objective-C Java C#
Write once, run anywhere
"The biggest mistake we made as a company was betting
too much on HTML5 instead of native." - Mark Zuckerberg
Embrace the differences != !=
c# Everywhere MonoTouch Mono for Android Native
The Power of C# •Base Class Library •LINQ •Parallel LINQ
•Memory Management •Task Parallel Library •Dynamic •Skill Reuse
xamarin Tools •Access to full platform SDKs •100% Native •Linker
•Debugging •frequent releases •active community •Improved API
C# CFStringRef keys[] = { kCTFontAttributeName,
kCTForegroundColorAttributeName }; CFTypeRef bval[] = { cfListLineCTFontRef, CGColorGetConstantColor(kCGColorBlack) }; attr = CFDictionaryCreate ( kCFAllocatorDefault, (const void **) &keys, (const void **) &bval, sizeof(keys) / sizeof(keys[0]), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks); astr = CFAttributedStringCreate( kCFAllocatorDefault, CFSTR("Hello World"), attr); obj-c var attr = new CFStringAttributes { Font = listLineCTFont, ForegroundColor = UIColor.Black.CGColor }; var astr = new NSAttributedString ("Hello World", attrs);
C# <activity android:name=".SampleActivity" android:label="@string/app_name">
<intent-‐filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-‐filter> </activity> findViewById(R.id.button).setOnClickListener( new View.OnClickListener() { @Override public void onClick(View v) { // handle click } } ); Java [Activity(Label="@string/AppName", MainLauncher=true)] FindViewById<Button>(Resource.Id.Button).Click += delegate { // handle click };
- - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - UI and Platform Code Shared Code
What code can be shared? * with some limitations •Most
non-UI or platform code •Core application logic •Entities •LINQ (objects, XML) •Network access •File / Database Access *
sharing techniques •File Linking •Abstraction •Observer Pattern •Partial Classes and
Methods •Conditional Compilation •portable class libraries
library: xamarin.mobile Supports iOS, Android and Windows Phone xamarin.com/mobileapi
None
Case Study: iCircuit
http://praeclarum.org/post/31799384896/icircuit-code-reuse-the-fourth-edition 16% 84% Shared Platform 31% 69% 13% 87% iOS
WP7 Mac 19% 81% Android Case Study: iCircuit
Case Study: TouchDraw
http://lipsky.me/2012/9/11/touchdraw-code-reuse-updated 39% 61% Shared Platform 24% 76% 28% 72% iOS
Mac Android Case Study: TouchDraw
SignalR Client Libraries http://github.com/gshackles/SignalR C# To Go Mono.CSharp http://github.com/gshackles/CSharpToGo Case
Study: Class Libraries
Questions?