building your first android app with xamarin
TRANSCRIPT
university.xamarin.com
Microsoft: Your Complete Mobile Solution
Deploy to emulator
and device
iOS
Xamarin’s unique approach
Shared C# codebase • 100% native API access • High performance
Windows C# UI
What is Xamarin.Android?
C# source Native execution
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
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#
Always up-to-date
Full support for all Android versions
Xamarin Platform support
Broad support for Android devices, including
phones, tablets, Android Wear and Amazon Fire TV
Open Source – open.xamarin.com
Develop on Mac or Windows
Microsoft Visual Studio
on Windows
Visual Studio for Mac
on macOS (preview)
Development workflow
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
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
Integrating .NET Libraries
You can integrate
your shared
business logic
packaged as a PCL
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
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 XMLprotected 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
Xamarin.Android UI is
built from Google’s
controls and layout
panels, wrapped in C#
by Xamarin
Android UI
Get fully native look and
feel with native controls
Native UX
Visual Studio provides
a UI Designer on
Windows and macOS
UI Designer
Get Started Todayxamarin.com/download
Free self-guided courses
Q&A
Samples available at:
https://aka.ms/raz619