Architecting applications for Windows 8 and Windows Phone 8 by Karl Ots / @fincooper

Architecting applications for WinRT and WinPRT

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About the the presenter

• Karl Ots, Technical Consultant at Symbio

• Windows Phone 8 and Windows 8 trainer

• Windows Azure Insider

• Co-founder of Young Developers Finland

• Microsoft Student Partner

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What we’ll cover

• What shared core means and what it doesn’t

• UX differences

• Porting vs maximum reuse

• Best practices of common scenarios

• Demos

Shared core

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Shared WinRT Core

Networking

Proximity

Sensors

Location

File System

Core app

model

Threading

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Windows 8 Platform

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• CLR – common language runtime

• BCL – base class library

• FCL – framework class library

Some definitions

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Windows 8 app model

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WP8 MANAGED app model

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WP8 app model

Native app model Legacy app model

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Windows Phone Runtime

Full WinRT (around

11,000 members)Subset adopted for

Windows Phone

Runtime (around

2,800 members)

New for Windows

Phone Runtime

(around 600

members)

•Phone-specific additions to Windows Runtime include

• Speech synthesis and recognition

•Windows.Phone.PersonalInformation

• LockScreen and LockScreenManager

•More…

Targeting maximum reuse

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Strategies for targeting both platforms

• Use Model-View-ViewModel

• Share portable .NET code in Portable Class Library

• Use common Windows Runtime API (Add as Link)

• Use Windows Runtime Components for language interoperability

• Use #if conditionals for small code differences

• Use extension methods to bridge implementation differences

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Cross-platform app architecture with PLC

Régis

LaurentDirector of Operations,

Global Knowledge

Competencies include:

Gold Learning

Silver System Management

DEMOPixPresenter

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What’s portable in PixPresenter?

Platform-specific

Portable /shareable

Platform-specific

Windows Phone app Windows Store app

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“Add as Link”

Régis

LaurentDirector of Operations,

Global Knowledge

Competencies include:

Gold Learning

Silver System Management

DEMOAdd as Link

#td2013fi @fincooper

Small code differences

Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>{

double _accelX = args.Reading.AccelerationX;double _accelY = args.Reading.AccelerationY;// Update ellipse location

});

Deployment.Current.Dispatcher.BeginInvoke(() =>{

double _accelX = args.Reading.AccelerationX;double _accelY = args.Reading.AccelerationY;//Update ellipse location

});

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Threading

#if NETFX_COREDispatcher.RunAsync(CoreDispatcherPriority.Normal, () => {#elseDeployment.Current.Dispatcher.BeginInvoke(() => {#endif

double _accelX = args.Reading.AccelerationX;double _accelY = args.Reading.AccelerationY;

#if conditional blocks

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HttpWebResponse and HttpWebRequest

var request = (HttpWebRequest)WebRequest.Create(autoCompleteUri);

HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync();

// retrieve data using StreamReader

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HttpWebResponse and HttpWebRequest

var request = (HttpWebRequest)WebRequest.Create(autoCompleteUri);request.BeginGetResponse(new AsyncCallback(AutoCompleteCallback), request);}

private void AutoCompleteCallback(IAsyncResult callback){

HttpWebRequest request = (HttpWebRequest)callback.AsyncState;HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(callback);// retrieve data using StreamReader

}

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Extension Methods

public static Task<HttpWebResponse> GetResponseAsync(this HttpWebRequest request){

var taskComplete = new TaskCompletionSource<HttpWebResponse>();request.BeginGetResponse(asyncResponse =>{

HttpWebRequest responseRequest = (HttpWebRequest)asyncResponse.AsyncState;

HttpWebResponse someResponse = (HttpWebResponse)responseRequest.EndGetResponse(asyncResponse);

taskComplete.TrySetResult(someResponse);}, request);

return taskComplete.Task;}

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HttpWebResponse and HttpWebRequest

#if WINDOWS_PHONEusing MyExtensionClass#endif

var request = (HttpWebRequest)WebRequest.Create(autoCompleteUri);

HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync();

// retrieve data using StreamReader

Use carefully – performance in ABYSMAL

Best practices

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Most common reasons to fail certification

• Windows Phone: failure to check for (light) themes

• Windows 8: no privacy policy

Do NOT share XAML. Just don’t.

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Different Form Factors Require Different UX

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Translating UX

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Translating UX – Details View

CaseMoomin video store

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Case: Moomin video store

• Windows 8 client ported to Windows Phone 8

• Core Models and ViewModels unchanged

• Azure backend for distributing media (Win8) and keeping track of in-app purchases receipts

• Different Store, different in-app purchases

• WP: download limitations

• Different media players

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Thank you!Time for QA and a quick raffle!