Xamarin is a mobile development platform that enables developers to create Android applications using a shared C# codebase. It offers 100% native API access and supports all Android versions across various devices, with capabilities for integrating .NET and Java libraries. Visual Studio provides a UI designer for streamlined development on both Windows and macOS.

2. university.xamarin.com

3. Microsoft: Your Complete Mobile Solution

4. Deploy to emulator
and device

5. iOS
Xamarin’s unique approach
Shared C# codebase • 100% native API access • High performance
Windows C# UI

6. What is Xamarin.Android?
C# source Native execution

7. Mono and ART VMs run side-by-side to execute a Xamarin.Android app
Xamarin.Android execution
Android
Runtime (ART)
Mono
Runtime
Linux Kernel
android.*
libraries
java.*
libraries
.NET
libraries
Your
IL code

8. Xamarin.Android – 100% API coverage
Text-to-speech Toolbar Printing Framework Renderscript NFC
System.Data System.Collections System.Numerics System.Core System.ServiceModel
System.Net System System.IO System.Linq System.Xml
C#

9. Always up-to-date
Full support for all Android versions

10. Xamarin Platform support
Broad support for Android devices, including
phones, tablets, Android Wear and Amazon Fire TV

11. Open Source – open.xamarin.com

13. Develop on Mac or Windows
Microsoft Visual Studio
on Windows
Visual Studio for Mac
on macOS (preview)

14. Development workflow

15. Activities: a collection of collaborating parts that
comprise Android apps
App structure
Activity 1
UI
Code
Activity 2
UI
Code
Activity 3
UI
Code
Data files,
images, etc.
MyApp

16. Activity definition
<LinearLayout ... >
<TextView ... >
<EditText ... >
<Button ... >
<TextView ... >
</LinearLayout>
Pi.axml
[Activity]
public class PiActivity : Activity
{
...
SetContentView(Resource.Layout.Pi);
}
PiActivity.cs
An XML layout file
that defines the UI
The related C# class
provides the behavior

19. Integrating .NET Libraries
You can integrate
your shared
business logic
packaged as a PCL

20. You can use JNI or a Bindings Library to incorporate Java libraries into your
Xamarin.Android app
Integrating Java Libraries
PayPal TritonPlayerArcGIS ...
Mapping Finance Music

21. Set the ID of a View in XML using the id attribute and the syntax @+id/
Access UI from code
<EditText android:id="@+id/digitsInput" ... />
Set an id
in the XML
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(Resource.Layout.Pi);
var et = FindViewById<EditText>(Resource.Id.digitsInput);
et.TextChanged += OnTextChanged;
}
Lookup
in code

24. Xamarin.Android UI is
built from Google’s
controls and layout
panels, wrapped in C#
by Xamarin
Android UI

25. Get fully native look and
feel with native controls
Native UX

26. Visual Studio provides
a UI Designer on
Windows and macOS
UI Designer

28. Get Started Today
xamarin.com/download

29. Free self-guided courses

30. Thank you
@flyinggeekette
jumcn@microsoft.com

31. Q&A
Samples available at:
https://aka.ms/raz619