Video for this session here: http://www.youtube.com/watch?v=VEuMgogl8eY&list=PL35E8B636BEC8411D&index=10&feature=plpp_video Mike Bluestein will take us through the features of our unified cross-platform API that lets you use the same API to access Contacts, Location and Camera on iOS, Android and Windows Phone 7.

1. Xamarin.Mobile
Accessing Unified Cross-Platform Features
June 14, 2012
Copyright 2012 © Xamarin Inc. All rights reserved

2. Agenda
Xamarin.Mobile
Mike Bluestein
Technical Writer
Xamarin Documentation Team
mike.bluestein@xamarin.com
@mikebluestein
Xamarin
Copyright 2012 © Xamarin Inc. All rights reserved

3. Xamarin.Mobile

4. Xamarin.Mobile
• Cross Platform API

5. Xamarin.Mobile
• Cross Platform API
• MonoTouch

6. Xamarin.Mobile
• Cross Platform API
• MonoTouch
• Mono for Android

7. Xamarin.Mobile
• Cross Platform API
• MonoTouch
• Mono for Android
• Windows Phone 7

8. Architecture

9. Architecture
Xamarin.Mobile

10. Architecture
Xamarin.Mobile
Contacts

11. Architecture
Xamarin.Mobile
Contacts Geolocation

12. Architecture
Xamarin.Mobile
Compass +
Contacts Geolocation
Accelerometer

13. Architecture
Xamarin.Mobile
Compass +
Contacts Geolocation Camera
Accelerometer

14. Architecture
Xamarin.Mobile
Compass +
Contacts Geolocation Camera Notifications
Accelerometer

15. Xamarin.Mobile Contacts

16. Xamarin.Mobile Contacts
• Maps to native implementation on each
platform

17. Xamarin.Mobile Contacts
• Maps to native implementation on each
platform
• AddressBook implements IQueryable

18. Xamarin.Mobile Contacts
• Maps to native implementation on each
platform
• AddressBook implements IQueryable
• LINQ

19. Contacts - Android
ContentResolver content= getContentResolver();
Cursor ncursor = null;
try {
ncursor = content.query (ContactsContract.Data.CONTENT_URI,
new String[] { ContactsContract.Data.MIMETYPE, ContactsContract.Contacts.LOOKUP_KEY, ContactsContract.Contacts.DISPLAY_NAME },
ContactsContract.Data.MIMETYPE + "=? AND " + ContactsContract.CommonDataKinds.StructuredName.FAMILY_NAME + "=?",
new String[] { ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE, "Smith" }, null);
while (ncursor.moveToNext()) {
print (ncursor.getString(ncursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME)) + lineSep);
String lookupKey = ncursor.getString (ncursor.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
Cursor dcursor = null;
try {
dcursor = content.query (ContactsContract.Data.CONTENT_URI,
new String[] { ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.Phone.NUMBER,
ContactsContract.Data.DATA1 },
ContactsContract.Contacts.LOOKUP_KEY + "=?", new String[] { lookupKey }, null);
while (dcursor.moveToNext()) {
String type = dcursor.getString (ncursor.getColumnIndex(ContactsContract.Data.MIMETYPE));
if (type.equals (ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE))
print ("Phone: " + dcursor.getString(dcursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)) +
lineSep);
else if (type.equals (ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE))
print ("Email: " + dcursor.getString(dcursor.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA1)) +
lineSep);
}
} finally {
if (dcursor != null)
dcursor.close();
}
}
} finally {
if (ncursor != null)
ncursor.close();
}

20. Contacts - iOS
ABAddressBookRef ab = ABAddressBookCreate();
CFStringRef name = CFSTR ("Smith");
CFArrayRef smiths = ABAddressBookCopyPeopleWithName(ab, name);
CFRelease (name);
int count = CFArrayGetCount(smiths);
for (int i = 0; i < count; ++i) {
ABRecordRef person = (ABRecordRef)CFArrayGetValueAtIndex(smiths, (CFIndex)i);
if (ABRecordGetRecordType(person) != kABPersonType)
continue;
NSString *name = (NSString*)ABRecordCopyCompositeName(person);
NSLog ("%@n", name);
[name release];
ABMultiValueRef phoneNumberProp = ABRecordCopyValue(person, kABPersonPhoneProperty);
NSArray* numbers = (NSArray*)ABMultiValueCopyArrayOfAllValues(phoneNumberProp);
CFRelease(phoneNumberProp);
for (NSString *pvalue in numbers)
NSLog ("Phone: %@n", pvalue);
[numbers release];
ABMultiValueRef emailProp = ABRecordCopyValue(person, kABPersonEmailProperty);
NSArray* emails = (NSArray*)ABMultiValueCopyArrayOfAllValues(emailProp);
CFRelease(emailProp);
for (NSString *evalue in emails)
NSLog ("Email: %@n");
[emails release];
}
CFRelease (ab);
CFRelease (smiths);

21. Xamarin.Mobile Contacts

22. Xamarin.Mobile Contacts
var book = new AddressBook () {
PreferContactAggregation = true
} ;
foreach (Contact c in book.Where (c => c.LastName == "Smith")) {
Console.WriteLine (c.DisplayName);
foreach (Phone p in c.Phones)
Console.WriteLine ("Phone: " + p.Number);
foreach (Email e in c.Emails)
Console.WriteLine ("Email: " + e.Address);
}

23. Contacts

24. MediaPicker

25. MediaPicker
• Take Photos and Videos

26. MediaPicker
• Take Photos and Videos
• Select Photos and Videos

27. MediaPicker
• Take Photos and Videos
• Select Photos and Videos
• Programmatic feature detection

28. MediaPicker
• Take Photos and Videos
• Select Photos and Videos
• Programmatic feature detection
• MediaPicker.PhotosSupported

29. MediaPicker
• Take Photos and Videos
• Select Photos and Videos
• Programmatic feature detection
• MediaPicker.PhotosSupported
• MediaPicker.VideosSupported

30. Selecting Photos

31. Selecting Photos
var picker = new MediaPicker ();
picker.PickPhotoAsync ()
.ContinueWith (t =>
{
if (t.IsCanceled || t.IsFaulted) // user cancelled or error
return;
Bitmap b = BitmapFactory.DecodeFile (t.Result.Path);
RunOnUiThread (() => platformImage.SetImageBitmap (b));
});

32. Selecting Photos
var picker = new MediaPicker ();
picker.PickPhotoAsync ()
.ContinueWith (t =>
{
if (t.IsCanceled || t.IsFaulted) // user cancelled or error
return;
Bitmap b = BitmapFactory.DecodeFile (t.Result.Path);
RunOnUiThread (() => platformImage.SetImageBitmap (b));
});

33. Taking Photos or Videos

34. Taking Photos or Videos
• Specify which camera to use

35. Taking Photos or Videos
• Specify which camera to use
• Query for camera availability

36. Taking Photos or Videos
• Specify which camera to use
• Query for camera availability
• Specify video quality

37. Taking Photos or Videos
• Specify which camera to use
• Query for camera availability
• Specify video quality
• Async and C# TPL Compatible

38. Taking Photos or Videos
• Specify which camera to use
• Query for camera availability
• Specify video quality
• Async and C# TPL Compatible
• Task.ContinueWith, IsCancelled, IsFaulted

39. Taking Photos or Videos
if (!picker.IsCameraAvailable)
return;
VideoView videoView = FindViewById<VideoView> (Resource.Id.video);
picker.TakeVideoAsync (new StoreVideoOptions
{
Directory = "Xamovies",
DefaultCamera = CameraDevice.Front,
DesiredLength = TimeSpan.FromMinutes (5)
})
.ContinueWith (t =>
{
if (t.IsCanceled || t.IsFaulted) // user cancelled or error
return;
videoView.SetVideoPath (t.Result.Path);
});

40. MediaPicker

41. Geolocation

42. Geolocation
• Geolocator class

43. Geolocation
• Geolocator class
• Retrieve current location

44. Geolocation
• Geolocator class
• Retrieve current location
• Listen for Location changes

45. Geolocation
• Geolocator class
• Retrieve current location
• Listen for Location changes
• DesiredAccuracy influences the location
technology that is used

46. Geolocation

47. Resources
• http://xamarin.com/mobileapi
• Download:
http://xamarin.com/xamarinmobileapipreview.zip
• API Docs:
http://betaapi.xamarin.com/?link=root:/Xamarin.Mobile

48. Xamarin
Seminar
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Copyright 2012 © Xamarin Inc. All rights reserved