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Part 1 - Understanding the Xamarin Mobile Platform

Xamarin is presented as a platform built from C#, Mono .NET, a compiler, and IDE tools. The page says this setup lets developers write for iOS and Android with familiar C# syntax, share code across platforms, and reuse that code for Windows Phone in some cases.

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  • Xamarin combines C#, Mono .NET, compiler support, and IDE tools for building iOS and Android apps.
  • C# gives access to familiar syntax and features such as Generics, Linq, and the Parallel Task Library.
  • The compiler targets each platform differently, producing native iOS apps or Android apps with MonoVM and JIT, while stripping unused code during linking.
  • Platform SDKs are exposed through C# namespaces, including CocoaTouch on iOS and Android SDK namespaces on Android.
  • Business logic, database access, network access, and other common functions can be written once and reused across platforms.
  • Xamarin development can be done in Xamarin Studio or Visual Studio, depending on the target platforms.
  • iOS development requires a Mac, Xcode, and Apple’s Developer Program for device testing and distribution.
  • Android development requires Java and the Android SDK, and can be done on Mac or Windows with Xamarin Studio or Visual Studio.
  • Windows Phone apps are built with Microsoft’s Visual Studio toolset, and C# code can still be shared with iOS and Android.
  • Xamarin uses native UI controls, and screens can be built in code or with platform-specific visual designers.
  • The page lists platform-specific UI patterns such as iOS hierarchical navigation, Android back button and action menu, and Windows Phone panorama layout and live tiles.
  • Existing C# code and libraries can be reused, including SQLite-NET, NewtonSoft.JSON, and SharpZipLib.
  • Xamarin.iOS can use Objective-C libraries through btouch bindings, and Xamarin.Android can use Java libraries through .jar bindings.
  • P/Invoke can connect C# code to native C libraries, including SQLite on iOS and Android.
  • C++ access is discussed through Cxxi or by wrapping C++ in C and binding through P/Invoke.