Windows 8 Development PCs, Tablets & Mobile

1. Windows 8 Development
PCs, Tablets & Mobile
Hagit Badash

2. WINDOWS 8

3. Windows 8
New desktop design
Start screen
Touch, Keyword and mouse activation in different
platforms
Roaming profiles
Windows 8 architecture

4. Windows 8 Desktop

5. Roaming profiles
• Local settings saving
var localSettings =
Windows.Storage.ApplicationData.Current.LocalSettings;
localSettings.Values["currentPage"] = MyBook.CurrentPage;
• Roaming Settings Saving
var roamingSettings =
Windows.Storage.ApplicationData.Current.RoamingSettings;
roamingSettings.Values["currentPage"] = MyBook.CurrentPage;
– If there is no roaming profile, It will default to local storage

6. Architecture

7. WINRT

8. WinRT
• WinRT is the Object Oriented Programming
replacement for Win32.
– An unmanaged native layer and its API is object
oriented that can be consumed both from native or
managed languages
– Written in C++ and designed from the beginning to
be object oriented.
– A COM-based API, relying on an enhanced COM
that implements the IInspectable interface

9. Relation between .NET & WinRT
• .NET Client profile (C#,VB.NET applications)
– Desktop Application development
• .NET Metro profile (Windows 8 application)
– subset of types from the .NET Framework
• .NET has the ability to directly reference
WinRT components as if they were .NET
assemblies.

10. Advantages
• App Container and Application Permissions
• Overlapping Windows No Longer Exist

11. WinRT Projections
• New name for ‘Bindings”
• Projections are the process of exposing APIs to
three environments:
– Native
– HTML/JavaScript
– .NET
• Hide the use of Com

12. DEMO
C++11 WITH WINRT

13. ASYNC PROGRAMING

14. Asynchrony in a Nutshell
• Synchronous  Wait for result before returning
– string DownloadString(...);
• Asynchronous  Return now, call back with result
– void DownloadStringAsync(..., Action<string> callback);
• Asynchrony benefits
– UI responsiveness: Frees UI thread for interaction
– Server scalability: Thread can be reused for other requests

15. Asynchronous Methods
Goal: Just like synchronous programming
– You can have your cake and eat it too!
• Framework: Use Task<T> for all asynchrony
– Add Task<T> support to existing .NET and Silverlight APIs
– Easy for you to do the same
• Languages: Asynchronous Methods
– “async” modifier marks method or lambda as asynchronous
– “await” operator yields control until awaited task completes

16. Task<T>
• Represents “ongoing operation”
– Could be async I/O, background worker, anything...
– Single object for status, result and exceptions
• Composable callback model
– var task2 = task1.ContinueWith(t => … t.Result …);
– The “await” operator rewrites to continuations
• Combinators
– WhenAll, WhenAny, Delay, etc.

17. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcesAsFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
}

18. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
}

19. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
}

20. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
}

21. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
}

22. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
}

23. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
}

24. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
}


25. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
}


26. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
}
 

27. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
}
 

28. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
 }
 

29. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
 }
  

30. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
 }
   

31. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
  }
   

32. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
   }
   

33. Asynchronous Control Flow
async void DoWorkAsync() {
var t1 =
ProcessFeedAsync("www.acme.com/rss");
var t2 =
ProcessFeedAsync("www.xyznews.com/rss");
async Task ProcessFeedAsync(string
await Task.WhenAll(t1, t2);
DisplayMessage("Done"); url) {
} var text = await
DownloadFeedAsync(url);
var doc =
ParseFeedIntoDoc(text);
await SaveDocAsync(doc);
ProcessLog.WriteEntry(url);
   }
   

34. WINDOWS 8 APPLICATION
DEVELOPMENT

35. Windows 8 Application Requirements
Logo images: large & small
Splash screen
Privacy policy
State persistency
About
Test screens in 3 main resolutions
Help

36. Windows 8 Application Requirements
Navigation
Design screens in 3 states:
landscape, portrait, 1/3, 2/3
Settings
Background tasks
Badge notification
Tiles animations

37. Windows 8 Application Requirements
Search contract
Push notification
Toast notification
App bar application part
App bar item specific part
Title bar
Pin items

38. Windows 8 Application Requirements
Extended splash screen
Share contract
Transitions between screens
Animations

39. DEMO
GRID APPLICATION

40. UPGRADING EXISTING .NET
APPLICATIONS

41. UI Changes
• New Features and capabilities should be
considered as part of the design of the new
application:
– Touch first, less chrome, fast, fluid;
– Live Tiles
– Application bar
– Charms
• New namespaces Windows.UI.Xaml vs
System.Windows

42. I/O changes
• Asynchronous only using async – await
keywords
• Functions name changed:
– System.IO.Stream.BeginRead to
System.IO.Stream.ReadAsync

43. Storage Changes?
• Instead of using the System.IO.IsolatedStorage
class, use the types in the Windows.Storage
Replace With
System.IO.IsolatedStorage. Windows.Storage.
IsolatedStorageFile ApplicationData.Current.LocalFolder
System.IO.IsolatedStorage. Windows.Storage.
IsolatedStorageSettings ApplicationData.Current.LocalSettings

44. Threading Changes
Replace With
System.Threading.Thread.MemoryBarrier Interlocked.MemoryBarrier method in the
method System.Threading namespace
System.Threading.Thread.ManagedThread Environment.CurrentManagedThreadId
Id property property in the System namespace
System.Threading.Thread.CurrentCulture CultureInfo.CurrentCulture property in
property the System.Globalization namespace
System.Threading.Thread.CurrentUICultur CultureInfo.CurrentUICulture property in
e property the System.Globalization namespace
Windows.System.Threading.ThreadPoolTi
System.Threading.Timer class
mer class
Windows.System.Threading.ThreadPool
System.Threading.ThreadPool class
class

45. Reflection changes
• Most members from the System.Type class
have been moved to the
System.Reflection.TypeInfo class.
• Retrieve the TypeInfo object by calling the
System.Reflection.
IntrospectionExtensions.GetTypeInfo(System.Type)

46. Extension methods - converting types
• System.IO.WindowsRuntimeStreamExtensions
– Converting between managed streams and streams in the
Windows Runtime.
• System.IO.WindowsRuntimeStorageExtensions
– Opening Windows Runtime files and folders as managed
streams.
• System.Runtime.InteropServices.WindowsRuntime.
WindowsRuntimeBufferExtensions
– Converting to and from IBuffer.

47. WINDOWS PHONE 8
ADDITIONAL FEATURES

48. Features
• Files and Storage
– Several ways to access the same file
• Isolated Storage as WP7.1
• Storage APIs using URI: ms-appdata:///local/myfile.txt
• Storage APIs
– Compatibility
• WP8 Storage is subset of WinRT
• Not Supporting: Roaming and Temporary data, Local
and Roaming Settings

49. Features (Cont.)
• Reserved Folders
– Shared/Media – album display while playing audio
– Shared/ShellContent – background images for tiles
– Shared/Transfers – used by Background File
Transfer service

50. Features (Cont.)
• Background Agents
– Renew often
– Do not implement critical tasks
– For more reliable tasks use push notifications
• Tiles and Lock Screen Notifications
• Push Notifications

51. Features (Cont.)
• Resources
– Contacts and Calendars in Windows Phone
– Launchers and Choosers
– Alarms and reminders
– The Windows Phone camera
– The Windows Phone sensors
– Video content

52. Features (Cont.)
• App to App communication
– Auto-launching with File and Protocol associations
– File associations
– Protocol associations
• Network Communication
• Proximity Sensors and Bluetooth

53. Features (Cont.)
• Speech Input
• Maps and Location
• Wallet Support
• In-App Purchasing

54. Resources
• Application must inform the user and request
access to resources

55. Contacts and Calendar
• Providers
– Window Live
– Exchange
– Facebook
– Aggregated accounts (Twitter, LinkedIn etc.)

56. Contacts and Calendar (Sample)

57. Contacts and Calendar (Sample)

58. Contacts and Calendar (Sample)

59. Launchers and Choosers
• Launcher
– API that launches one of the built-in applications,
such as the Contacts application
– When the new application appears, the user can
choose to complete or cancel the task.
– When the user closes the new application, the
calling application is usually reactivated.

60. Launchers and Choosers
• Chooser
– API that launches one of the built-in applications,
such as the Contacts application or the camera,
through which the user completes a task.
– When the new application appears, the user can
choose to complete or cancel the task.
– When the user closes the new application, the
calling application is usually reactivated and
supplied with data and status.

61. Launchers
• BingMapsDirectionsTask • MarketplaceReviewTask
• BingMapsTask • MarketplaceSearchTask
• ConnectionSettingsTask • MediaPlayerLauncher
• EmailComposeTask • PhoneCallTask
• MapDownloaderTask • SaveAppointmentTask
• MapsDirectionsTask • SearchTask
• MapsTask • ShareLinkTask
• MapUpdaterTask • ShareMediaTask
• MarketplaceDetailTask • ShareStatusTask
• MarketplaceHubTask • SmsComposeTask
• WebBrowserTask

62. Choosers
• AddressChooserTask • SaveEmailAddressTask
• AddWalletItemTask • SavePhoneNumberTask
• CameraCaptureTask • SaveRingtoneTask
• EmailAddressChooserTask
• GameInviteTask
• PhoneNumberChooserTask
• PhotoChooserTask

63. Camera
• Ways to use Camera
– CameraCaptureTask chooser
• Photograph a picture
– PhotoCamera class
• Capture photos & video streams
– PhotoCaptureDevice or AudioVideoCaptureDevice
• Advance capturing
• Real time video processing app can be
registered as “Lens”

64. Sensors Library - WinRT
• Windows.Devices.Sensors – compatible with
WinRT
– Accelerometer
– Inclinometer
– Gyrometer
– Compass
– OrientationSensor

65. Determine Sensor Availability

66. Start/Stop Sensor

67. Summary

68. TARGETING TO WINDOWS 8
WINDOWS PHONE 8

69. Differences
• Screen Size
• Controls
• Application Life Cycle

70. Sharing Strategy
• Separate UI Logic from application logic
– Use MVVM
• Portable Class Library – for shared code

71. Sharing Strategy
Windows 8 Windows
App Phone 8 App
Views Views
Portable Class
Library
VM
Model

72. Conditional Block
• Enable/Disable lines of code based on
compilation platform
• Constants
– NETFX_CORE – Windows 8
– WINDOWS_PHONE – Windows Phone 8
• Use when there are small differences
• Otherwise difficult to maintain the code

73. Conditional Block sample

74. Inheritance
• Shared functionality in base class
• Platform specific code in derived class
• Great for separating features

75. Inheritance sample

76. Partial Classes & Methods
• Shared functionality on one code file
• Platform specific in additional code file
• Classes are marked as partial
• Link to shared functionality file in both
projects

77. DEMO
CROSS PLATFORM

78. Contact Information
Hagit Badash
hagb@e4d.co.il