Cross-Platform Mobile Development in Visual Studio

XamarinMobile Cross Platform Development in Visual Studio

bryan costanichem: bryanc@xamarin.comtw: @bryancostanichslides:slideshare.net/bryancostanich/crossplatform-mobile-development-in-visual-studio

Sample Codegithub.com/xamarin/mobile-samples/TaskyPro

Xamarin Platform

One Language + C# Framework LINQ Lambdas Task Parallel Library (TPL) Compile-Time Checks Garbage Collectionº

Native Perf. + UX Compiles Down to Native Code Not Interpreted All Native UX Controls Full Platform SDK Access iOS: Selectors/Obj-C Runtime Android: JNI Fast Enough for Gamesº

Reuse Story C# Libraries Obj-C Bindings + Binding Projects .jar Bindings + Binding Projects C via pInvoke C++ via Cxxiº

Other PlatformsWindows - via .NETMac - via Xamarin.MacLinux - via MonoEtc.

Community + Support Huge C# Community StackOverflow.com IRC + chat.xamarin.com Great Supportº

General XPlat Considerations

Design Platform-Specific UX UX in iOS != Android != Windows Phone UX Metaphors are Different: Navigation Controller vs. Back Button Write-Once, Run-Anywhere is Problematic Users Expect Native UXº

Choose Device Targets iPhone != iPad Beware Android Fragmentation Form Factor + Capability Differences Inform UX Pro-Tip: Minimize Targetsº

Building an X-Plat Architecture

Architecture Layers Separation of Responsibility Encapsulation Core Code Sharingº

VS Project/Solution Setup

Code Sharing - Linking vs. PCL Portal Library Projects - Take a Lot of Work Great Discussion Here: http://forums.xamarin.com/discussion/28/challenges-thoughts-loves/p1 Takeaway: PCL is clean, but difficult to implement Linking is less “clean” but simpler Our Recommendation Now: File Linking for Most Projects Walkthrough Here: Linkingº

WP7 + Android New Blank Solution: "[AppName]" New C# Lib Project: "[AppName].Core" Test Project: “[AppName].Core.Tests” New Mono for Android Project: “[AppName].Droid” New WP7 Project "[AppName].WP7"º

iOS - Visual Studio 2012 VS MonoTouch Plugin: https://github.com/ste8/VSMonoTouch Visual Studio SDK (to build plugin): http://msdn.microsoft.com/en-us/library/bb166441(v=vs.80).aspx iOS - Visual Studio 2010 VS MonoTouch Plugin: https://github.com/follesoe/VSMonoTouchº

.csproj edit: iOS - Plugin Config <ItemGroup> <Reference Include="mscorlib" /> Create iOS Project (on Mac): "[AppName].iOS"<Reference Copy to Solution Directory or Synch in Source Include="monotouch" /> Manually Edit iOS .csproj File, add Refs -> <Reference Include="System" /> Remove CoreLib Reference -> <Reference Include="System.Xml" /> Limitations: Can Build, but No Designer, or <Reference Deployment Include="System.Core" /> (must use Mac for now**) </ItemGroup>º

Shared Code Linking Two Linking Options: Auto or Manual Auto: Use Project Linker VS Add-In Add a project link, voila. (2010 + 2012) Manual: Link Files Add Files as Linksº

Shared Data + Data Access Layer Data Access Layer SQLite on iOS + Android, C# SQLIte on WP7: http://code.google.com/p/csharp-sqlite/ SQLite.NET ORM Use Generics for CRUD Convenience Methods: TaskDatabase.csº

Platform AbstractionsHandling Divergence and Taking Advantage of PlatformFeatures

ConditionalCompilationPre-Defined Symbols: #if __ANDROID__ #if WINDOWS_PHONE #if SILVERLIGHTCan Add Additional in Build Settings

Class Abstraction Sometimes, You Wanna Provide Different Implementations for Different Platforms Partial Classes Partial Methods Interfacesº

Xamarin.MobileXPlat API AbstractionsXamarin.com/MobileAPI Compass + Contacts Geolocation Acceleromete Camera Notifications r

Other XPlat Libs MonoCross - http://code.google.com/p/monocross/ MvvmCross - https://github.com/slodge/MvvmCross Vernacular - https://github.com/rdio/vernacular MonoGame - http://monogame.codeplex.com/º

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Cross-Platform Mobile Development in Visual Studio

by bryancostanich on Aug 09, 2012

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Cross-Platform Mobile Development in Visual Studio Presentation Transcript