Xamarin Forms in Action - Brief Overview

15 minutes presentation about Xamarin basics

Transcript

1. Xamarin Forms in Action Medchest Assistant
2. Project architecture. PCL
3. Xamarin Forms. Init Android project: global::Xamarin.Forms.Forms.Init (this, bundle); iOS project: global::Xamarin.Forms.Forms.Init ();
4. Xamarin Forms XAML
5. Xamarin Forms XAML <ContentPage.Content> <StackLayout Orientation="Vertical" VerticalOptions="FillAndExpand"> <Label x:Name="label" Text="List of medicines” HorizontalOptions="Center" /> <StackLayout Orientation="Horizontal"> <Entry x:Name="nameEntry" HorizontalOptions="FillAndExpand" /> <DatePicker x:Name="datePicker" HorizontalOptions="End"/> <Button x:Name="addButton" Text="Add" Clicked="add" HorizontalOptions="End" /> <Button x:Name="scanButton" Text="Scan" Clicked="scan" HorizontalOptions="End" /> </StackLayout> <ListView x:Name="list" VerticalOptions="FillAndExpand"> <ListView.ItemTemplate> <DataTemplate> <TextCell Text="{Binding Name}" Detail="{Binding ExpireDate, StringFormat='Expires: {0:MM-dd-yy}'}"> <TextCell.ContextActions>
6. Xamarin Forms Bindings <ListView x:Name="list" VerticalOptions="FillAndExpand"> <ListView.ItemTemplate> <DataTemplate> <TextCell Text="{Binding Name}" Detail="{Binding ExpireDate, StringFormat='Expires: {0:MM-dd-yy}'}"> <TextCell.ContextActions> <MenuItem Clicked="onDelete" CommandParameter="{Binding .}" Text="Delete" IsDestructive="True" /> </TextCell.ContextActions> </TextCell> </DataTemplate> </ListView.ItemTemplate> </ListView> </StackLayout> </ContentPage.Content>
7. Platfrom specific designers
8. No XAML Designer
9. Platform Specific. Common Interface namespace MedChestAssistant { public interface INotificationHelper { void notify(String message); } }
10. Platform Specific. Interface Implementation [assembly: Xamarin.Forms.Dependency (typeof (NotificationHelperImpl))] namespace MedChestAssistant.iOS { public class NotificationHelperImpl: INotificationHelper { #region INotificationHelper implementation public void notify (string message) { var notification = new UILocalNotification(); // set notification params … UIApplication.SharedApplication.ScheduleLocalNotification(notification); } #endregion public NotificationHelperImpl () { } } }
11. NuGet packages
12. Packages in project tree
13. Platform-specific initialisation Android: ZXing.Mobile.MobileBarcodeScanner.Initialize (Application); iOS: ZXing.Net.Mobile.Forms.iOS.Platform.Init();
14. iOS-specific notifications setup if (UIDevice.CurrentDevice.CheckSystemVersion (8, 0)) { var notificationSettings = UIUserNotificationSettings.GetSettingsForTypes ( UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound, null ); app.RegisterUserNotificationSettings (notificationSettings); }
15. Thank you. Questions? constantine.mars@gmail.com