Building Windows Phone 7 Applicationsmicro-workflow.com/PDF/DragosM-BuindingWP7Apps.pdfSilverlight...

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Building Windows Phone 7 Applications Dragos Manolescu Windows Phone Engineering YOW!2010 Australia, December 2010

Transcript of Building Windows Phone 7 Applicationsmicro-workflow.com/PDF/DragosM-BuindingWP7Apps.pdfSilverlight...

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Building Windows Phone 7 Applications

Dragos Manolescu

Windows Phone Engineering

YOW!2010 Australia, December 2010

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A WP7 APPLICATION WP7 Code Demo

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Developer Insights

• Familiar language and tools

• The power of .NET in your pocket

• Build and debug apps with(out) a device

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WP7 Layered Architecture

Application Code

Silverlight XNA DHTML

App management Licensing Chamber isolation Software updates

Shell frame Session manager Direct3D Compositor

Xbox LIVE Bing Location Push notifications Windows Live ID

Security Networking Storage

Hardware

Board Support Package

App Model UI Model Cloud

Application

Services

Kernel

BSP

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A Personal Device

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I: Application Model

• Own process, instance of the CLR

• Phone controls the application lifecycle

• Extensibility hooks

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Application Startup Instrumentation

208.28ms 89.63ms 71.93ms @TH.TaskHostStartedEvent Memory: 0.25MB Elapsed: ms : ms 212.19ms 93.54ms 2.44ms +TH.ResumeTaskHostBeginEvent Memory: 0.25MB Elapsed: 1285.95ms : 441.50ms 212.19ms 93.54ms 2.44ms +TH.StartTaskHostBeginEvent Memory: 0.25MB Elapsed: 1285.92ms : 441.50ms 213.50ms 94.85ms 3.75ms +TH.CreateWindowBeginEvent Memory: 0.26MB Elapsed: 1284.52ms : 441.50ms 244.72ms 100.43ms 78.06ms +TH.CreateXCPBeginEvent Memory: 0.26MB Elapsed: 1213.44ms : 464.17ms 244.81ms 100.52ms 78.16ms +TH.CoCreateInstanceBeginEvent Memory: 0.26MB Elapsed: 107.97ms : 73.27ms 322.57ms 130.34ms 107.97ms @SL.NpCtrlLoadDllEvent Memory: 0.32MB Elapsed: ms : ms 352.75ms 135.19ms 112.82ms @SL.ControlStartupEvent Memory: 0.32MB Elapsed: ms : ms 352.78ms 135.22ms 112.85ms +TH.AttachControlBeginEvent Memory: 0.32MB Elapsed: 1105.38ms : 390.90ms 363.07ms 145.17ms 122.80ms +SL.ControlInitializeBeginEvent Memory: 0.34MB Elapsed: 1095.03ms : 390.56ms 501.92ms 251.77ms 229.40ms +SL.CompositorCreationBeginEvent Memory: 0.43MB Elapsed: 48.68ms : 23.59ms 564.94ms 288.85ms 265.23ms +SL.DownloadRequestEvent Memory: 1.26MB Elapsed: 893.13ms : 331.12ms 567.57ms 291.14ms 267.52ms +SL.PutSourceBeginEvent Memory: 1.27MB Elapsed: 890.50ms : 330.78ms 715.36ms 396.97ms 373.08ms +SL.PutRootVisualBeginEvent Memory: 2.85MB Elapsed: 742.25ms : 288.54ms 550.60ms 278.08ms 254.49ms -SL.CompositorCreationBeginEvent Memory: 1.25MB Elapsed: ms : ms 742.61ms 418.73ms 394.78ms +SL.ClrStartupBeginEvent Memory: 2.86MB Elapsed: 477.91ms : 92.62ms 744.38ms 420.50ms 396.55ms +TH.GetPlatformProfileBeginEvent Memory: 2.86MB Elapsed: 8.06ms : 0.27ms1220.52ms 811.55ms 780.06ms -SL.ClrStartupBeginEvent Memory: 3.66MB Elapsed: ms : ms1457.61ms 858.28ms 826.78ms -SL.PutRootVisualBeginEvent Memory: 3.79MB Elapsed: ms : ms1458.07ms 858.73ms 827.24ms -SL.PutSourceBeginEvent Memory: 3.79MB Elapsed: ms : ms1458.07ms 858.73ms 827.24ms -SL.DownloadRequestEvent Memory: 3.79MB Elapsed: ms : ms1458.10ms 858.76ms 827.27ms -SL.ControlInitializeBeginEvent Memory: 3.79MB Elapsed: ms : ms1458.16ms 858.83ms 827.33ms -TH.AttachControlBeginEvent Memory: 3.79MB Elapsed: ms : ms1498.11ms 881.71ms 846.86ms -TH.StartTaskHostBeginEvent Memory: 5.39MB Elapsed: ms : ms1495.88ms 879.49ms 844.64ms @SL.SplashScreenDrawnEvent Memory: 5.39MB Elapsed: ms : ms1976.47ms 1284.21ms 1248.81ms @TH.FrameInitialized Memory: 5.63MB Elapsed: ms : ms2011.14ms 1318.33ms 1282.93ms @TH.NavigationServiceStarted Memory: 5.63MB Elapsed: ms : ms2136.23ms 1430.94ms 1393.62ms +TH.PageNavigation Memory: 5.67MB Elapsed: 396.91ms : 29.85ms2257.81ms 1540.16ms 1502.14ms @TH.PageInitialized Memory: 5.82MB Elapsed: ms : ms2533.14ms 1798.86ms 1760.68ms -TH.PageNavigation Memory: 6.43MB Elapsed: ms : ms

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WP7 APPLICATION MODEL WP7 Code Demo

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Developer Insights

• App, Frame, Page; Navigation Service; hooks

• Full access to available resources

• Watchdog prevents long waits

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Fluid Experiences

• Mobile apps

• Fast response times

• Modest hardware (compared with desktop)

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SAVING AND RESTORING STATE WP7 Code Demo

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Developer Insights

• At most 10s to save state

• Background thread quantum when saving state

• Unlimited number of stateful applications

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Sensitivity Point

9,962.98ms^P29T006 +KU411.0000 About to read object10,015.47ms^P29T006 -KU411.0000 (ElapsedBeginToEnd Wct=52.49ms TctStall=33.63ms) Object read

9,029.82ms^P29T006 +KU411.0000 About to read object9,032.75ms^P29T006 -KU411.0000 (ElapsedBeginToEnd Wct=2.93ms TctStall=0.00ms) Object read

7,242.58ms^P28T000 +KU411.0002 About to save object7,510.56ms^P28T000 -KU411.0002 (ElapsedBeginToEnd Wct=267.97ms TctStall=195.59ms) Object saved

6,188.32ms^P28T000 +KU411.0002 About to save object6,380.00ms^P28T000 -KU411.0002 (ElapsedBeginToEnd Wct=191.68ms TctStall=140.96ms) Object saved

Reading from Isolated Storage (DataContractSerializer, streamReader.Read)

Writing to Isolated Storage (DataContractSerializer, streamWriter.Write)

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II: Power

• Usage profile differs from other devices

• App CPU modes: full, SWFI, power collapse

• Everything costs power; really

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Usage Profiles

PC

Smart phone

0

10

20

30

40

50

Typical use betweencharges Battery size

Hours

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Touch Sensor

Legend: Current Power

Power contribution: 10s of mW

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GeoLocation

Legend: Current Power

Power contribution: 100s of mW

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Accelerometer

Legend: Current Power

Power contribution: 10s of mW

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Network Request/Response

Legend: Current Power

Power contribution: 1000s of mW

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RUNNING UNDER LOCK WP7 Code Demo

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Developer Insights

• Run under the lock screen

• Silverlight:

– Disable IdleDetectionMode

– Stop DispatcherTimers, network, sensors

• XNA:

– Disable IdleDetectionMode

– Set InactiveSleepTime to 1s

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Silverlight, SWFI

Silverlight, DispatcherTimer

Silverlight, high CPU

XNA Legend: Current Power

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III. Asynchronous/Event-Driven Programming

• Asynchronous world

• IObservable<T> mathematical dual of IEnumerable<T>

• Async computations as queries

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GEOFENCING WITH THE GEOLOCATION API

WP7 Code Demo

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2D BUBBLE LEVEL WITH THE WP7 ACCELEROMETER API

WP7 Code Demo

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Developer Insights

• Rx available on every WP7 phone

• Async computations as queries

• Queries evaluate lazily

• Mock event sources with ToObservable()

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http://bit.ly/bqERTb

http://bit.ly/bqERTb
http://bit.ly/bqERTb
http://bit.ly/bqERTb
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Summary

• WP7 applications – Phone controls their lifecycle

– Component power profiles; run under lock

– Async computations as queries

• Free development and design tools: http://create.msdn.com

http://bit.ly/cZWC7r

http://bit.ly/aIjdj9

http://create.msdn.com/
http://create.msdn.com/
http://create.msdn.com/
http://bit.ly/cZWC7r
http://bit.ly/aIjdj9
http://bit.ly/aIjdj9
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THANK YOU! DRAGOSM AT MICROSOFT.COM

BLOGS.MSDN.COM/DRAGOMAN


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