you get a few seconds to save the current state of the application to a permanent storage.when the app gets reactivated, the user will expect it to return to the same state.a good place to save state while the application is running is the page’s OnNavigatedTo/OnNavigatedFrom methods.
Certification pitfalls:Always closes without exceptionMust not be unresponsive for over 3sMust launch within 5sBack should close app and lead to prev pageNever delay a phone callContent: no violenceor sexual
agenda o introductiono metro styleo silverlight developmento phone developmento the marketplace
about me o 6 years of developingo 4 years of C# experienceo lecturer at “Prografika”o microsoft student partnero patogiau.lto http://linkd.in/dovydasnavickas
introductionfeatures metro tools cloud o new platform o based on familiar technologies and toolso multiple hardware vendors o consistent baseline (cpu, resolution, etc.)o your chance to enter a brand new market!
introductionfeatures metro tools cloud METRO IS WINDOWS PHONE‟S DESIGNLANGUAGE. IT‟S MODERN AND CLEAN.IT‟S ABOUT TYPOGRAPHY AND CONTENT.
silverlightintroduction o a subset of the .net framework and WPFo first introduced as a browser plug-in o .net runtime on multiple platforms (mac, windows)o currently targeted for: o device apps (currently windows phones) o client apps (emphasis on enterprise) o rich media apps (such as streaming video)o reuse code for desktop, web and phone apps!
code + xamlo xaml is basically a declarative language for object instantiationo xaml is great for UI development. it‟s: o standard XML o hierarchical o extensible o declarativeo we can do most things both in xaml and in code, but you‟ll quickly find that xaml is much more convenient for some tasks
code + xamlcomparisonXAML <Grid x:Name="ContentPanel" Margin="12,0,12,0"> <TextBlock Text="Hello, Windows Phone 7!" Margin="6" HorizontalAlignment="Center" VerticalAlignment="Center" /></Grid>C#var tb = new TextBlock();tb.Text = "Hello, Windows Phone 7!";tb.HorizontalAlignment = HorizontalAlignment.Left;tb.VerticalAlignment = VerticalAlignment.Top;tb.Margin = new Thickness(6);ContentPanel.Children.Add(tb);
code + xamlthe visual tree o controls contain other controls, and some controls are built using other controlso this creates a hierarchical relationship between the controls which we call the visual treeo when you write xaml, the structure of the visual tree is very clear
controlsanatomyo inherits from FrameworkElement o two main types: o custom control – a reusable, templatable control (e.g. a button) o user control – a way to modularize your application (e.g. employee view)o uses dependency properties and routed eventso responds to input (touch, keyboard)
controlsdependency properties o extend CLR properties with: o data binding o change notification o animation o validation o control-tree inheritance
controlsrouted events o extend CLR eventso can travel along the visual tree: o bubbling or tunneling
controlsrouted events Root Element 1 Element 2 Element Element Element Element 1.1 1.2 2.1 2.2 PreviewMouseDown on Root PreviewMouseDown on Element 1 PreviewMouseDown on Element 1.2 MouseDown (bubble) on Element 1.2 MouseDown (bubble) on Element 1 MouseDown (bubble) on Root
controlsstyles o defines a set of dependency properties and valueso similar to CSS in HTMLo provides a great way to control the looks of your app from a central location
controlstemplates o completely customize appearance of controls without having to write any code or inherit from the controlo all controls have default styles and templateso template editing is easy with Expression Blend
data bindingo flow data from a source to a target o source: any CLR object o target: Dependency Property only o modes: one way, two wayo supports change notifications o changes to a source object automatically sent to the UI o both property and collection changes are supported
data bindingdata templates o provide a visual representation of an object o the default behavior if no template is specified is to display the Object.ToString() resulto use bindings to display datao respond to changes using triggerso can only be written in xaml
data bindingcollections o use ItemsControl whenever you need to bind to a collectiono provide an ItemTemplate to change the visuals of each itemo controls that inherit from ItemsControl: o ListBox, ContextMenu, MenuItem, Panorama
data bindingthe mvvm patterno designed specifically with business logic and WPF/Silverlight in mind Model datao relies on bindings to retrieve and set data from and to the view model presentation logic Viewo uses commands to Model and state perform operations on the view modelo relies on notifications to UI (and possibly communicate between the View some UI logic) layerso creates a data-driven UI
graphicsimages o store images as resources or as content o content is recommendedo use the Image control to show themo use WritableBitmap to create images in runtime o you can also use it to capture your screens
graphicsvectors o controls inheriting from Shape can be used to create 2D shapes o Rectangle, Ellipse, Line, Polyline, Polygon, Patho Path is the most versatile, accepting a Geometry object which can represent any shapeo it is easiest to create shapes using Expression Blend
graphicstransformso FrameworkElement has a RenderTransform property which can be assigned to: o TranslateTransform (move) o ScaleTransform o RotateTransform o SkewTransform o CompositeTransform (combine any of the above)o additionally, the Projection property allows creating 3D-like effects
graphicsanimationso animate dependency property using a Timeline that fits the property type: o DoubleAnimation, ColorAnimation, PointAnimationo use Storyboard to group a few animations togethero use an easing function to make the animation look more “real” (e.g. to add elasticity)o it‟s easiest to create storyboards in xaml and in Expression Blend
windows phone o application structureo phone-specific controlso sensors and services
application structurefileso App.xaml: application entry point. contains global resources, services, events (startup, shutdown, etc.) and instantiates PhoneApplicationFrameo WMAppManifest.xml: contains application deployment information: capabilities, tasks, icon.o MainPage.xaml: a PhoneApplicationPage that contains the main view of the application.
application structuredefault control treeo PhoneApplicationFrame o PhoneApplicationPage o Grid named “LayoutRoot” o StackPanel named “TitlePanel” o TextBlock named “ApplicationTitle” o TextBlock named “PageTitle” o Grid named “ContentPanel” o <your content goes here>you can clear the entire pagecontent and write your own, but formost apps it is recommended tostay within the „metro‟ guidelines
application structurenavigationo web browser like: each page can be navigated to using the NavigationService by passing a URI o the PhoneApplicationFrame can only display a single page at a time!o the hardware back button can be used to go back to the previous page on the stacko you can pass data to the page using URI query or by placing it in a globally known location (such as the App class)
application structuretombstoningo windows phone can only run one application at a time. so, each time you switch to another application, the current one gets terminated – i.e. tombstonedo your app will get tombstoned if: o you click the start button o you get a call while the app is running o the phone gets locked o the app uses a launcher or a chooser (e.g. use the camera)o you can use the app‟s Activated and Deactivated events to handle tombstoning
application structureapplication baro preferred menu system for your appso up to 4 buttons, monochrome 62x62 bitmaps o add a button from Blend to get some default bitmaps o get more from http://thenounproject.como add up to 5 menu items
phone controls o most of silverlight‟s controls have been adjusted to windows phone, supporting touch and templated to the phone‟s theme o while some controls such as ComboBox and ToolTip exist on the phone, their use is discouraged
phone controlspanorama and pivoto panoramic applications offer a unique way to view controls, data, and services by using a long horizontal canvas that extends beyond the confines of the screen.o pivot can be used for filtering large datasets, viewing multiple data sets, or switching application views.
sensorsaccelerometero measures acceleration forces such as gravity or the forces caused by moving the sensor o can tell the direction of the earth relative to the phoneo use the Accelerometer class to access the sensor o this sensor reports a constant value in the emulator, so it is recommended that you mock its values for testingo possible uses: responding to phone movements in games, bubble levels, etc.
sensorsgeo-location o obtain the current location of the phone using the GeoCoordinateWatcher classo you can get the latitude, longitude, altitude and current speed of the deviceo this sensor is not available in the emulator. use the GpsEmulator project, available at app hubo use the Bing maps control to display a map of the current location
sensorscamera o obtain photos from the camera using the CameraCaptureTask choosero get a Stream from the chooser and create a BitmapImage from ito the emulator will provide a simple black- and-white image to capture
servicespush notificationso allows applications to receive updates in the background (app doesn‟t need to be running!)o three types of notifications: o toast – when app is inactive o tile (background, title, count) o raw – directly to the appo you need to create a compatible web service
what‟s newin version 7.5 (aka “mango”)o internet explorer 9 o SQL CE: in-memory local SQL databaseo multi-tasking and live agentso silverlight 4o raw camera feed accesso tcp/ip socketso better developer toolso beta sdk shipping this month
resources o Programming Windows Phone 7 by Charles Petzold (free ebook) http://www.charlespetzold.com/phone/o Windows Phone 7 Developer Guide http://msdn.microsoft.com/en-us/library/gg490765.aspxo quickstarts http://create.msdn.com/en-us/education/quickstartso the noun project (icons for your app) http://thenounproject.com/
marketplaceadvantages o integrated into the phone o use the zune software to browse on the PCo free or paid apps with a trial optiono downloads, updates and payments are managed for youo free registration for students using DreamSpark
marketplacesteps develop submit certify & debug & validate & sign windows phone application marketplace deployment service
marketplacebest practices o make it appealing (use metro!)o make it stable and reliableo make it original and usefulo make it easy to useo read the certification requirements carefully o test your app as suggested to avoid common certification pitfalls
marketplacein lithuania o currently not supported directly in App Hubo use a third-party broker: appa market / yalla appso as a student, you get 100 credits which you can use to: o upload apps o unlock devices for development
resourceso certification requirements http://msdn.microsoft.com/en-us/library/hh184843(v=VS.92).aspxo dreamspark https://www.dreamspark.com/o yalla apps http://www.yallaapps.com/o appa market http://appamarket.com/o best practices for application marketing http://create.msdn.com/en- US/home/about/app_submission_walkthrough_application_marketing