Video for these slides: http://www.youtube.com/watch?v=CcdUq1AQfQ8 Mike has been an active member of the community since MonoTouch launched, and recently joined Xamarin's excellent documentation team. In this seminar, Mike shows you how to use 5 of the new APIs available to developers with Mono for Android 4.0 and Ice Cream Sandwich; Calendar API ShareActionProvider Action Bar Tabs TextureView Android Beam

1. Xamarin
Seminar
9th February 2012
Copyright 2012 © Xamarin Inc. All rights reserved

2. Agenda
Top 5 Features of Ice Cream
Sandwich
Mike Bluestein
Technical Writer
Xamarin Documentation Team
mike.bluestein@xamarin.com
Xamarin
Copyright 2012 © Xamarin Inc. All rights reserved

3. Introduction
This session will survey some of the new features
available in Android 4 Ice Cream Sandwich (ICS)
Xamarin
Copyright 2012 © Xamarin Inc. All rights reserved

4. Introduction
This session will survey some of the new features
available in Android 4 Ice Cream Sandwich (ICS)
Calendar API
Xamarin
Copyright 2012 © Xamarin Inc. All rights reserved

5. Introduction
This session will survey some of the new features
available in Android 4 Ice Cream Sandwich (ICS)
Calendar API
ShareActionProvider
Xamarin
Copyright 2012 © Xamarin Inc. All rights reserved

6. Introduction
This session will survey some of the new features
available in Android 4 Ice Cream Sandwich (ICS)
Calendar API
ShareActionProvider
Action Bar Tabs
Xamarin
Copyright 2012 © Xamarin Inc. All rights reserved

7. Introduction
This session will survey some of the new features
available in Android 4 Ice Cream Sandwich (ICS)
Calendar API
ShareActionProvider
Action Bar Tabs
TextureView
Xamarin
Copyright 2012 © Xamarin Inc. All rights reserved

8. Introduction
This session will survey some of the new features
available in Android 4 Ice Cream Sandwich (ICS)
Calendar API
ShareActionProvider
Action Bar Tabs
TextureView
Android Beam
Xamarin
Copyright 2012 © Xamarin Inc. All rights reserved

9. Calendar API

10. Calendar API
• Official Calendar API

11. Calendar API
• Official Calendar API
• Read-write access to calendar data

12. Calendar API
• Official Calendar API
• Read-write access to calendar data
• android.permission.READ_CALENDAR

13. Calendar API
• Official Calendar API
• Read-write access to calendar data
• android.permission.READ_CALENDAR
• android.permission.WRITE_CALENDAR

14. Calendar Demo

15. Calendar Demo

16. Calendar Demo
• Listing Calendars

17. Calendar Demo
• Listing Calendars
• Listing Calendar Events

18. Calendar Demo
• Listing Calendars
• Listing Calendar Events
• Adding an Event

19. ShareActionProvider

20. ShareActionProvider
• Enables sharing action from the Action Bar

21. ShareActionProvider
• Enables sharing action from the Action Bar
• Creates list of app that can handle the a
sharing intent

22. ShareActionProvider
• Enables sharing action from the Action Bar
• Creates list of app that can handle the a
sharing intent
• Keeps a history of previously used apps for
easy access later

23. ShareActionProvider
• Enables sharing action from the Action Bar
• Creates list of app that can handle the a
sharing intent
• Keeps a history of previously used apps for
easy access later
• Consistent user experience for sharing data
throughout Android

24. ShareActionProvider Demo

25. ShareActionProvider Demo
• Sharing an Image

26. ShareActionProvider Demo
• Sharing an Image

27. ShareActionProvider Demo
• Sharing an Image

28. Action Bar Tabs

29. Action Bar Tabs
• TabActivity deprecated in ICS

30. Action Bar Tabs
• TabActivity deprecated in ICS
• Action Bar supports tabs in ICS

31. Action Bar Tabs
• TabActivity deprecated in ICS
• Action Bar supports tabs in ICS
ActionBar.NavigationMode = ActionBarNavigationMode.Tabs;

32. Tabs Demo

33. TextureView

34. TextureView
• Hardware accelerated 2D rendering

35. TextureView
• Hardware accelerated 2D rendering
• Display video or OpenGL content stream

36. TextureView
• Hardware accelerated 2D rendering
• Display video or OpenGL content stream
• Supports view transformations

37. TextureView Example

38. TextureView Example
public class TextureViewActivity : Activity, TextureView.ISurfaceTextureListener
{
Camera _camera;
TextureView _textureView;
protected override void OnCreate (Bundle bundle)
{
base.OnCreate (bundle);
_textureView = new TextureView (this);
_textureView.SurfaceTextureListener = this;
SetContentView (_textureView);
}
public void OnSurfaceTextureAvailable (Android.Graphics.SurfaceTexture surface, int width, int height)
{
_camera = Camera.Open ();
var previewSize = _camera.GetParameters ().PreviewSize;
_textureView.LayoutParameters =
new FrameLayout.LayoutParams (previewSize.Width, previewSize.Height, (int)GravityFlags.Center);
try {
_camera.SetPreviewTexture (surface);
_camera.StartPreview ();
} catch (Java.IO.IOException ex) {
Console.WriteLine (ex.Message);
}
// this is the sort of thing TextureView enables
_textureView.Rotation = 45.0f;
_textureView.Alpha = 0.5f;
}
...
}

39. TextureView Example

40. Android Beam

41. Android Beam
• Allows sharing data using Near Field
Communication (NFC)

42. Android Beam
• Allows sharing data using Near Field
Communication (NFC)
• Pushes messages when devices are close

43. Android Beam
• Allows sharing data using Near Field
Communication (NFC)
• Pushes messages when devices are close
• Activity on one device creates a message

44. Android Beam
• Allows sharing data using Near Field
Communication (NFC)
• Pushes messages when devices are close
• Activity on one device creates a message
• Specifies Activity that can push it

45. Android Beam
• Allows sharing data using Near Field
Communication (NFC)
• Pushes messages when devices are close
• Activity on one device creates a message
• Specifies Activity that can push it
• Intent invoked on second device contains
the message data

46. Android Beam Example

47. Android Beam Example
Create a message

48. Android Beam Example
Create a message
protected override void OnCreate (Bundle bundle)
{
...
_nfcAdapter = NfcAdapter.GetDefaultAdapter (this);
_nfcAdapter.SetNdefPushMessageCallback (this, this);
}
public NdefMessage CreateNdefMessage (NfcEvent evt)
{
DateTime time = DateTime.Now;
var text = ("Beam me up!nn" + "Beam Time: " +
time.ToString ("HH:mm:ss"));
NdefMessage msg = new NdefMessage (
new NdefRecord[]{ CreateMimeRecord (
"application/com.example.android.beam",
Encoding.UTF8.GetBytes (text)) });
} };
return msg;
}
public NdefRecord CreateMimeRecord (String mimeType, byte [] payload)
{
byte [] mimeBytes = Encoding.UTF8.GetBytes (mimeType);
NdefRecord mimeRecord = new NdefRecord (
NdefRecord.TnfMimeMedia, mimeBytes, new byte [0], payload);
return mimeRecord;
}

49. Android Beam Example
Create a message Receive a message
protected override void OnCreate (Bundle bundle)
{
...
_nfcAdapter = NfcAdapter.GetDefaultAdapter (this);
_nfcAdapter.SetNdefPushMessageCallback (this, this);
}
public NdefMessage CreateNdefMessage (NfcEvent evt)
{
DateTime time = DateTime.Now;
var text = ("Beam me up!nn" + "Beam Time: " +
time.ToString ("HH:mm:ss"));
NdefMessage msg = new NdefMessage (
new NdefRecord[]{ CreateMimeRecord (
"application/com.example.android.beam",
Encoding.UTF8.GetBytes (text)) });
} };
return msg;
}
public NdefRecord CreateMimeRecord (String mimeType, byte [] payload)
{
byte [] mimeBytes = Encoding.UTF8.GetBytes (mimeType);
NdefRecord mimeRecord = new NdefRecord (
NdefRecord.TnfMimeMedia, mimeBytes, new byte [0], payload);
return mimeRecord;
}

50. Android Beam Example
Create a message Receive a message
protected override void OnCreate (Bundle bundle) IParcelable [] rawMsgs = Intent.GetParcelableArrayExtra (
{ NfcAdapter.ExtraNdefMessages);
...
NdefMessage msg = (NdefMessage)rawMsgs [0];
_nfcAdapter = NfcAdapter.GetDefaultAdapter (this);
_nfcAdapter.SetNdefPushMessageCallback (this, this);
}
public NdefMessage CreateNdefMessage (NfcEvent evt)
{
DateTime time = DateTime.Now;
var text = ("Beam me up!nn" + "Beam Time: " +
time.ToString ("HH:mm:ss"));
NdefMessage msg = new NdefMessage (
new NdefRecord[]{ CreateMimeRecord (
"application/com.example.android.beam",
Encoding.UTF8.GetBytes (text)) });
} };
return msg;
}
public NdefRecord CreateMimeRecord (String mimeType, byte [] payload)
{
byte [] mimeBytes = Encoding.UTF8.GetBytes (mimeType);
NdefRecord mimeRecord = new NdefRecord (
NdefRecord.TnfMimeMedia, mimeBytes, new byte [0], payload);
return mimeRecord;
}

51. Android Beam Example

52. References
Introduction to Ice Cream Sandwich
http://docs.xamarin.com/android/tutorials/Introduction_to_Ice_Cream_Sandwich
Xamarin
Copyright 2012 © Xamarin Inc. All rights reserved

53. Xamarin
Seminar
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9th February 2012
Copyright 2012 © Xamarin Inc. All rights reserved