alec tucker an introduction to cross platform native app development using xamarin to develop, test...

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Alec Tucker

An Introduction to Cross Platform Native App Development using Xamarin to Develop, Test and Monitor

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Develop

What exactly do we mean by native app development?

So why isn’t everything native?

Native performance from cross platform code

Xamarin.iOS does full Ahead Of Time (AOT) compilation to produce an ARM binary for Apple’s App Store.

Xamarin.Android takes advantage of Just In Time (JIT) compilation on the Android device.

Trends

Keeping up with changeiOSMacApple WatchApple TVAndroidAndroid WearGoogle GlassAmazon Fire TVXbox, plus

EnvironmentStandalone PC Windows, Android

Standalone Mac iOS, Android

PC + Mac iOS, Android, Windows

Mac + Virtual PC iOS, Android, Windows

EnvironmentMac + Virtual PC iOS, Android, Windows

Requires at least a Business license

Runs on Mac and Windows, supports iOS and Android

Environment

Traditional Xamarin.Forms 2.0

Shared UI Code

Models

ViewModels

Services

Views

Views Views

ViewModels

Models Services

Views

Custom Renderers

Custom Renderers Custom

RenderersNow with UWP support!

Testing is easy, right?

Fragmentation

App complexity

Fast release cycles

Short sessions

High user expectations

5 iOS versions

9 Android versions20 iOS devices

1,294 Android brands

24K+ distinct Android devices

35 locales (iOS)

57 locales (Android)

6 iOS screen sizes

Connectivity variance

Device performance variations

Thousands of APIs

Memory constraints

Back end integration3rd party libraries

Authentication requirements

OWASP top 10 for mobile

20 languages (iOS)9 languages (Android)

27 screen sizes (Android)

Screen space!

Sure, apart from…

Operator constraintsOWASP ASVS Sensor availability

Fragmentation

Xamarin.UITestWrite UI test scripts in C#

Construct tests live, while app is running using app.Repl()

Run tests on emulators or on physical devices

Structured and coded in the same way as unit tests

UITest Sample Code[Test]public void PerformTest(){ string firstName = "Alec"; string lastName = "Tucker";

app.WaitForElement(c => c.Marked("First name"));

app.Tap(c => c.Marked("First name")); app.EnterText(firstName);

app.Tap(c => c.Marked("Last name")); app.EnterText(lastName);

var control = app.Query(c => c.Marked("Full name")).FirstOrDefault(); Assert.IsNotNull(control);

string expectedValue = string.Format("{0} {1}", firstName, lastName); string actualValue = control.Text;

Assert.IsTrue(expectedValue == actualValue);}

UITest Sample Codepublic override bool FinishedLaunching(UIApplication app, NSDictionary options){ Xamarin.Calabash.Start();

global::Xamarin.Forms.Forms.Init();

// Enable use of StyleId to identify controls in the UITest code Forms.ViewInitialized += (object sender, ViewInitializedEventArgs e) => { // http://developer.xamarin.com/recipes/testcloud/set-accessibilityidentifier-ios/ if (null != e.View.StyleId) { e.NativeView.AccessibilityIdentifier = e.View.StyleId; } };

LoadApplication(new App());

return base.FinishedLaunching(app, options);}

Xamarin TestCloudTest on market leading devices without buying them all

Test on large numbers of devices

View test results and share results with clients

Xamarin TestCloud

Monitor

“Listening to what people say is misleading: you have to watch what they actually do”Jakob Nielsen“perhaps the best-known design and usability guru on the Internet” (Financial Times)“the guru of Web page usability” (The New York Times)

Cross platform, as you’d expectXamarin.iOS, Xamarin.Android, Xamarin.Mac, Windows Phone, Windows Store, Windows DesktopAutomatic catching of unhandled exceptions

Xamarin Insights

CollectionTypes

DisableCollectionDisabledCollectionTypes

DisableDataTransmission

ForceDataTransmission

IdentifyInitialize

IsInitialized

Report ReportSeverity

Save Stop

TrackTrackTime

Traits

Xamarin InsightsIntegrates with

Github

PivotalTracker Jira

Slack HipChat

Campfire

Visual Studio Online

Write interface, inject/find implementation

Pre-compiler directives

Command tracking with snippets in Visual Studio

Using with Mvvm

Sydney Mobile .Net (Xamarin) Developershttp://www.meetup.com/SydneyMobileDotNetDevelopers/December 8th: Xamarin 2015 Roundup – win a Xamarin license!!!

Queensland C# Mobile Developershttp://www.meetup.com/Queensland-based-MonoTouch-and-Mono-for-

Android/ November 24th

Melbournehttp://www.meetup.com/Melbourne-Xamarin-Meetup/

F# Sydneyhttp://www.meetup.com/fsharpsydney/ December 1st

Find out more

Alec Tuckerwww.whiteclarkegroup.com

@alecdtuckerblog.alectucker.comlinkedin.com/in/alectucker

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alec tucker an introduction to cross platform native app development using xamarin to develop, test...

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