Xamarin mobile

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Xamarin mobile

  1. 1. Mike Bluestein Developer/Writer Xamarin mike.bluestein@xamarin.com Xamarin.Mobile API @mikebluestein
  2. 2. Xamarin.Mobile • Cross Platform API Xamarin.iOS Xamarin.Android Windows Store Applications Windows Phone 8 Windows Phone 7.1 • Abstracts common device features
  3. 3. Now Open Source!
  4. 4. Architecture Contacts Xamarin.Mobile Geolocation Camera
  5. 5. Contacts
  6. 6. Contacts • AddressBook RequestPermission • Contact Phone Email Address Website Relationship
  7. 7. Contacts • Maps to native implementation on each platform • AddressBook implements IQueryable • LINQ
  8. 8. 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); Contacts - iOS
  9. 9. 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(); }
  10. 10. Xamarin.Mobile Contacts var book = new AddressBook (); 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); }
  11. 11. Geolocation
  12. 12. Geolocation • Geolocator • Position Latitude Longitude Accuracy Altitude Altitude Accuracy Heading
  13. 13. Geolocation • Geolocator class • Retrieve current location • Listen for Location changes • DesiredAccuracy influences the location technology that is used
  14. 14. MediaPicker
  15. 15. MediaPicker • Take Photos and Videos • Select Photos and Videos • Programmatic feature detection MediaPicker.PhotosSupported MediaPicker.VideosSupported MediaPicker. IsCameraAvailable
  16. 16. MediaPicker Camera • Specify which camera to use • Specify video quality • Async and C# TPL Compatible Task.ContinueWith, IsCancelled, IsFaulted
  17. 17. MediaPicker iOS var picker = new MediaPicker(); MediaPickerController controller = picker.GetTakePhotoUI (new StoreCameraMediaOptions { Name = "test.jpg", Directory = "MediaPickerSample" }); PresentViewController (controller, true, null); controller.GetResultAsync().ContinueWith (t => { // Dismiss the UI yourself controller.DismissViewController (true, () => { MediaFile file = t.Result; }); }, TaskScheduler.FromCurrentSynchronizationContext());
  18. 18. MediaPicker Android var picker = new MediaPicker (this); if (!picker.IsCameraAvailable) Console.WriteLine ("No camera!"); else { var intent = picker.GetTakePhotoUI (new StoreCameraMediaOptions { Name = "test.jpg", Directory = "MediaPickerSample" }); StartActivityForResult (intent, 1); }
  19. 19. MediaPicker Android protected override void OnActivityResult (int requestCode, Result resultCode, Intent data) { // User canceled if (resultCode == Result.Canceled) return; data.GetMediaFileExtraAsync (this).ContinueWith (t => { if (requestCode == 1) { // Video request ShowVideo (t.Result.Path); } else if (requestCode == 2) { // Image request ShowImage (t.Result.Path); } }, TaskScheduler.FromCurrentSynchronizationContext()); }
  20. 20. var mediaPickerController = mediaPicker.GetPickPhotoUI(); mediaPickerController.GetResultAsync() .ContinueWith (t => { mediaPickerController.DismissViewController ( true, () => { // User canceled or something went wrong if (t.IsCanceled || t.IsFaulted) return; // We get back a MediaFile MediaFile media = t.Result; }); }, TaskScheduler.FromCurrentSynchronizationContext()); MediaPicker Selecting Photos
  21. 21. Demo
  22. 22. Resources xamarin.com/mobileapi

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