![optimizing tombstoning (1)Know whatto savePivot.SelectedItemTIP: Set in Loaded and NOT NavigateToPanorama.DefaultItemScrollViewer position (use ScrollPositionHelper)TextBox.TextViewModelWhereto savePhoneApplicationService.Current.State[]PhoneApplicationPage.State[]Cache to IsolatedStorageWhento saveApplication life cycle eventsPage-level OnNavigateFrom/OnNavigateToDo not save state on back navigation](https://image.slidesharecdn.com/devdays2011-part2-110521110657-phpapp02/85/An-end-to-end-experience-of-Windows-Phone-7-development-Part-1-19-320.jpg)
An end-to-end experience of Windows Phone 7 development (Part 1)
- 2. Rudi Groblerhttp://www.rudigrobler.net@rudigroblerAn end-to-end experience of Windows Phone 7 developmentTRACK: NEXT GENERATION
- 3. agenda
- 4. orientation supportPhoneApplicationPage.SupportedOrientations property states what orientations the page supportsPortraitLandscapePortraitOrLandscapeIf set to PortraitOrLandscape, page will re-orientate itself automatically when the user rotates the phoneYou cannot force a page to re-orientate in codeYou can force a page to always use a specific orientation by setting the SupportedOrientations property to the value you required
- 6. orientation + SIPSIP takes up more space landscape than portraitvs
- 7. system tray and application barSystem TraySystem owned indicator area that display system-level status informationApps can show/hideApplication BarArea where applications can display buttons for the most common tasksCan display pop-up menu for less common tasks
- 8. application barUse the ApplicationBar instead of creating your own menu systemUp to 4 buttons plus optional menuSwipe up the bar to bring up the menuAll buttons must specify Text property as well as IconUrl (Changed in Beta)Don’t fill all 4 slots if not neededUse white foreground on transparent background for iconsSystem will colorize button according to users selected theme
- 10. application barPage scoped – Search, etcNot for item specific actions like save/delete, rather use the ContextMenuAbove SIP
- 12. Low Batterya world of interruptionsPhone CallsLock ScreenText MessageRemindersApplication Switch
- 13. Application lifecycle – the problem
- 14. moved to backgroundSave stateDormantTombstonedRestore stateFast switching a.k.a. dormant
- 15. application managementWindows Phone execution model is designed to provide end users with a fast, responsive experienceOnly one application can run at a timeSystem terminates application when user navigates awayApplication is Tombstoned when user navigates awaySystem saves state information then terminates you applicationWhen user navigates back to the application system restarts the application and passes state information backDeveloper must write code to respond to lifecycle eventsSave and restore stateMaintain illusion that the application is running continuouslyCheck if tombstoned (IsAppInstancePreserved)
- 16. lifecycle events - applicationApplication_LaunchingWhen the application is launching (from start)Not fired when the application is reactivatedApplication_ActivatedWhen application is activated (brought to foreground)Not fired when the application is first launchedApplication_DeactivatedWhen the application is deactivated (sent to background)Not fired when the application is closingApplication_ClosingWhen the application is closing (user hit back)Not fired when the application is deactivated
- 17. lifecycle events - pageOnNavigateToOnNavigateFrom
- 18. Application lifecycle – the solution
- 19. optimizing tombstoning (1)Know whatto savePivot.SelectedItemTIP: Set in Loaded and NOT NavigateToPanorama.DefaultItemScrollViewer position (use ScrollPositionHelper)TextBox.TextViewModelWhereto savePhoneApplicationService.Current.State[]PhoneApplicationPage.State[]Cache to IsolatedStorageWhento saveApplication life cycle eventsPage-level OnNavigateFrom/OnNavigateToDo not save state on back navigation
- 20. optimizing tombstoning (2)Optimize your storage formatsDataContractSerializerJSON.NET (MS implementation is VERY slow)XMLBinary (More work but VERY fast)MUST rehydrate in less than 10 secondsDefer loading when possible
- 21. optimizing tombstoning (3)Release resourcesCamera, Video, Location, Sensor, etcOn rehydrate/activate, remember GPS warm-up timeFramework will stop audio, sensors, networking, sockets, MediaElement & camera
- 23. phone threading model Touch thread
- 24. PerformanceProgressBar“The ProgressBar template for Silverlight that is built into the Windows Phone today has a negative performance cost in ‘indeterminate’ mode (the animating dots that often indicate loading during an operation of unknown time). The control is also known as ‘progress indicator’ according to the UX guidelines for the phone.”Use PerformanceProgressBar (Available in the Silverlight Toolkit for Windows Phone)Read more on Jeff Wilcox’s blog:http://bit.ly/PerformanceProgressBarProgressIndicator
- 25. LowProfileImageLoader“LowProfileImageLoaderis meant to address a very specific scenario: loading lots of images from the web at the same time.”Read more on David Anson’s blog:http://bit.ly/LowProfileImageLoaderImage decoding on background thread
- 26. Location+ Accuracy- Power- Speed- Indoors- Accuracy+ Power+ Speed- Wilderness+/- Accuracy+/- Power+/- Speed+/- Urban areasLocation servicesWiFiCell towers
- 27. Location
- 28. GeoCoordinateWatcherWarm it upSingletonCan be disabled
- 29. persistenceAll IO is restricted to Isolated StorageCreate files Manage SettingsIdeal for caching dataCheck out WP7Contrib and AgFxIsolated Storage based Relational DBsSterlingSQLiteStructured storage
- 31. push notificationsServer-initiated communicationEnable key background scenariosPreserves battery life and user experiencePrevents polling for updates
- 32. types of notificationsToastTileDeep toast
- 33. Push Notification ArchitectureCloud ServiceWindows Phone 7Push URI to Cloud Service4Push enabled applicationPush URI request/response13HTTP Post to URI with payload5Push notification to devicePush client service62Push client/server negotiationMPNS
- 34. Scenarios/Popular ApplicationsWeather AppsChess by PostSend to WP7Weather TileWarning ToastTurn TileMove ToastLink TileLink ToastBeezzSeattle Traffic MapAlphaJaxThere are hundreds and hundreds of Push apps in Marketplace!Unread TileDirect ToastTraffic TileTurn TileMove Toast
- 35. Windows Push Notification Server Side Helper Library“The library provides an easy way for sending all three kinds of push notification messages currently supported by Microsoft Push Notification Services (MPNS): Tile, Toast, and Raw. Our main goal here is to extract any complexity for sending push notification (PN) messages from your website (or web service) to a Windows Phone. This library helps developers to send push messages using only a few lines of code.”Read more on the Windows Phone Developer blog:http://bit.ly/PushNotificationHelper
- 36. don’t re-invent the wheelControl ToolkitsPhoneyToolsCoding4Fun ToolkitSilverlight Toolkit for Windows PhoneWP7ContribMVVM ToolkitsMVVM LightCaliburn.MicroDatabasesSterlingSQLiteAgFx
- 37. NuGet
- 38. text inputTextBoxintegrates with the software keyboardSoftware keyboard supports input scopingKey InputScopes: EmailNameOrAddressTextUrlNumberTimeTelephoneNumberPasswordBox has a 1 second delayText Text Revolution: A Game that Improves Text Entry on Mobile Touchscreen Keyboards
- 39. Text input
- 40. memory constraintsDo not use more than 90mb of RAMUse Coding4Fun Toolkit MemoryCounter+/- 30% reduction in working set
- 41. Certification checklistNo network, no problem?<90MB?Theme aware?Handles exceptions?Back button works as expected?User consent dialogs & settings
- 42. Monitor your applicationAdd a “Send Feedback” buttonStore crash data and ask user to email itAnalytics
- 44. Don’t forget the Xbox Kinectshow-down after sessions this evening!
- 45. DevDays 2011 SponsorsPLATINUM SPONSORwww.bbd.co.zaSILVER SPONSORwww.dvt.co.zaSILVER SPONSORwww.ctutraining.co.za
- 47. © 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.