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Introduction to Android Development Using .NET and MonoDroid

Introduction to Android Development Using .NET and MonoDroid. Greg Shackles Senior Application Developer MagazineRadar greg@gregshackles.com. About Me. Greg Shackles greg@gregshackles.com gregshackles.com Twitter: @ gshackles github.com/ gshackles. What We’ll Cover. What is Android?

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Introduction to Android Development Using .NET and MonoDroid

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  1. Introduction to Android Development Using .NET and MonoDroid Greg Shackles Senior Application Developer MagazineRadar greg@gregshackles.com

  2. About Me • Greg Shackles • greg@gregshackles.com • gregshackles.com • Twitter: @gshackles • github.com/gshackles

  3. What We’ll Cover • What is Android? • Android architecture • Application lifecycle • Mono / MonoDroid • MonoDroid API • Demos

  4. What is Android? • Full stack • Open source • SDK provides tools and Java API • Applications typically written in Java • Purchased by Google in 2005 • v1.0 released in October 2008 • developer.android.com

  5. Market Share (US) 28.7% 13%

  6. Architecture

  7. Architecture

  8. Architecture

  9. Architecture

  10. Architecture

  11. Component Types

  12. Activities • Provides UI for one screen • Can start other activities • Hierarchy of views • Typically defined in XML

  13. Activity Lifecycle Activity Starts onRestart() onStart() onResume() onCreate() User navigates back to the activity Activity is running User navigates back to the activity User navigates back to the activity Another activity is loaded Process killed Other apps need memory onPause() This activity is no longer visible onStop() Activity is shut down onDestroy()

  14. Activity Lifecycle (Simplified) • Activity stack • Configuration changes cause activity restart • Activity has 3 basic states • Running • Paused • Stopped

  15. Broadcast Receivers • No UI • Can start an activity • Receive/react to announcements • Apps can broadcast custom messages • Examples: low battery, phone call

  16. Services • No UI, runs in background • Stays running when application loses focus • Can be accessed by many applications • Example: Music player

  17. Content Providers • Enables applications to share data

  18. Intents • Messages used to activate components • Launch an activity • Start or bind to a service • Broadcast a message to receivers • Implicit intents • Intent filters • Components register their capabilities • Example: launcher

  19. Storage • Shared preferences • Internal storage • External storage (SD card) • Database (SQLite) • Remote

  20. Want to write Android applications in .NET? With MonoDroid, you can!

  21. What is Mono? • Implementation of the .NET CLR • Open source • Cross platform • Supports most of .NET 4.0 • Missing WPF, Entity Framework, WF, some WCF

  22. What is MonoDroid? • Runs side by side with Dalvik • Wraps Java/Android API bindings • Commercial product • Currently in public beta • Visual Studio 2010 or MonoDevelop • www.monodroid.net

  23. MonoDroidArchitecture • Android/Managed Callable Wrappers • JNI bridges to talk between Android and Mono • Optional shared runtime

  24. MonoDroid API • .NET events replace listener interfaces • Action replaces Runnable • Enumerations • Properties • Attributes and tooling generate configuration • OpenTK • Uses standard Android resource files

  25. Java vs C# Java

  26. Java vs C# Java C#

  27. Questions?

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