XamarinFormsNotesForProfessionals.pdf
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Pobierz
Xamarin
.Forms
Xamarin.Forms
Notes for Professionals
Notes for Professionals
of professional hints and tricks
100+ pages
GoalKicker.com
Free Programming Books
Disclaimer
This is an unocial free book created for educational purposes and is
not aliated with ocial Xamarin.Forms group(s) or company(s).
All trademarks and registered trademarks are
the property of their respective owners
Contents
About
................................................................................................................................................................................... 1
Chapter 1: Getting started with Xamarin.Forms
........................................................................................... 2
Section 1.1: Installation (Visual Studio)
......................................................................................................................... 2
Section 1.2: Hello World Xamarin Forms: Visual Studio
............................................................................................. 4
Chapter 2: Why Xamarin Forms and When to use Xamarin Forms
.................................................... 7
Section 2.1: Why Xamarin Forms and When to use Xamarin Forms
....................................................................... 7
Chapter 3: Xamarin Forms Layouts
.................................................................................................................... 8
Section 3.1: AbsoluteLayout
.......................................................................................................................................... 8
Section 3.2: Grid
........................................................................................................................................................... 10
Section 3.3: ContentPresenter
.................................................................................................................................... 11
Section 3.4: ContentView
............................................................................................................................................ 12
Section 3.5: ScrollView
................................................................................................................................................ 13
Section 3.6: Frame
....................................................................................................................................................... 14
Section 3.7: TemplatedView
....................................................................................................................................... 14
Section 3.8: RelativeLayout
........................................................................................................................................ 15
Section 3.9: StackLayout
............................................................................................................................................ 16
Chapter 4: Xamarin Relative Layout
............................................................................................................... 19
Section 4.1: Box after box
........................................................................................................................................... 19
Section 4.2: Page with an simple label on the middle
............................................................................................. 21
Chapter 5: Navigation in Xamarin.Forms
....................................................................................................... 23
Section 5.1: NavigationPage flow with XAML
............................................................................................................ 23
Section 5.2: NavigationPage flow
.............................................................................................................................. 24
Section 5.3: Master Detail Navigation
....................................................................................................................... 25
Section 5.4: Using INavigation from view model
..................................................................................................... 26
Section 5.5: Master Detail Root Page
........................................................................................................................ 28
Section 5.6: Hierarchical navigation with XAML
....................................................................................................... 29
Section 5.7: Modal navigation with XAML
................................................................................................................. 31
Chapter 6: Xamarin.Forms Page
........................................................................................................................ 32
Section 6.1: TabbedPage
............................................................................................................................................ 32
Section 6.2: ContentPage
........................................................................................................................................... 33
Section 6.3: MasterDetailPage
................................................................................................................................... 34
Chapter 7: Xamarin.Forms Cells
......................................................................................................................... 36
Section 7.1: EntryCell
................................................................................................................................................... 36
Section 7.2: SwitchCell
................................................................................................................................................. 36
Section 7.3: TextCell
.................................................................................................................................................... 37
Section 7.4: ImageCell
................................................................................................................................................. 38
Section 7.5: ViewCell
.................................................................................................................................................... 39
Chapter 8: Xamarin.Forms Views
....................................................................................................................... 41
Section 8.1: Button
....................................................................................................................................................... 41
Section 8.2: DatePicker
............................................................................................................................................... 42
Section 8.3: Entry
......................................................................................................................................................... 43
Section 8.4: Editor
........................................................................................................................................................ 43
Section 8.5: Image
....................................................................................................................................................... 44
Section 8.6: Label
........................................................................................................................................................ 45
Chapter 9: Using ListViews
..................................................................................................................................... 47
Section 9.1: Pull to Refresh in XAML and Code behind
............................................................................................ 47
Chapter 10: Display Alert
........................................................................................................................................ 48
Section 10.1: DisplayAlert
............................................................................................................................................ 48
Section 10.2: Alert Example with only one button and action
................................................................................. 49
Chapter 11: Accessing native features with DependencyService
....................................................... 50
Section 11.1: Implementing text-to-speech
................................................................................................................ 50
Section 11.2: Getting Application and Device OS Version Numbers - Android & iOS - PCL
................................. 53
Chapter 12: DependencyService
......................................................................................................................... 55
Section 12.1: Android implementation
........................................................................................................................ 55
Section 12.2: Interface
................................................................................................................................................. 56
Section 12.3: iOS implementation
............................................................................................................................... 56
Section 12.4: Shared code
........................................................................................................................................... 57
Chapter 13: Custom Renderers
............................................................................................................................ 58
Section 13.1: Accessing renderer from a native project
........................................................................................... 58
Section 13.2: Rounded label with a custom renderer for Frame (PCL & iOS parts)
............................................. 58
Section 13.3: Custom renderer for ListView
.............................................................................................................. 59
Section 13.4: Custom Renderer for BoxView
............................................................................................................. 61
Section 13.5: Rounded BoxView with selectable background color
....................................................................... 65
Chapter 14: Caching
.................................................................................................................................................. 68
Section 14.1: Caching using Akavache
....................................................................................................................... 68
Chapter 15: Gestures
................................................................................................................................................. 70
Section 15.1: Make an Image tappable by adding a TapGestureRecognizer
....................................................... 70
Section 15.2: Gesture Event
......................................................................................................................................... 70
Section 15.3: Zoom an Image with the Pinch gesture
.............................................................................................. 78
Section 15.4: Show all of the zoomed Image content with the PanGestureRecognizer
....................................... 78
Section 15.5: Tap Gesture
........................................................................................................................................... 79
Section 15.6: Place a pin where the user touched the screen with MR.Gestures
.................................................. 79
Chapter 16: Data Binding
........................................................................................................................................ 81
Section 16.1: Basic Binding to ViewModel
.................................................................................................................. 81
Chapter 17: Working with Maps
........................................................................................................................... 83
Section 17.1: Adding a map in Xamarin.Forms (Xamarin Studio)
........................................................................... 83
Chapter 18: Custom Fonts in Styles
................................................................................................................... 92
Section 18.1: Accessing custom Fonts in Syles
.......................................................................................................... 92
Chapter 19: Push Notifications
............................................................................................................................. 94
Section 19.1: Push notifications for Android with Azure
........................................................................................... 94
Section 19.2: Push notifications for iOS with Azure
.................................................................................................. 96
Section 19.3: iOS Example
........................................................................................................................................... 99
Chapter 20: Eects
.................................................................................................................................................. 101
Section 20.1: Adding platform specific Eect for an Entry control
...................................................................... 101
Chapter 21: Triggers & Behaviours
.................................................................................................................. 105
Section 21.1: Xamarin Forms Trigger Example
....................................................................................................... 105
Section 21.2: Multi Triggers
....................................................................................................................................... 106
Chapter 22: AppSettings Reader in Xamarin.Forms
.............................................................................. 107
Section 22.1: Reading app.config file in a Xamarin.Forms Xaml project
............................................................. 107
Chapter 23: Creating custom controls
........................................................................................................... 108
Section 23.1: Label with bindable collection of Spans
........................................................................................... 108
Section 23.2: Implementing a CheckBox Control
................................................................................................... 110
Section 23.3: Create an Xamarin Forms custom input control (no native required)
......................................... 116
Section 23.4: Creating a custom Entry control with a MaxLength property
....................................................... 118
Section 23.5: Creating custom Button
..................................................................................................................... 119
Chapter 24: Working with local databases
................................................................................................ 121
Section 24.1: Using SQLite.NET in a Shared Project
............................................................................................... 121
Section 24.2: Working with local databases using xamarin.forms in visual studio 2015
................................... 123
Chapter 25: CarouselView - Pre-release version
..................................................................................... 133
Section 25.1: Import CarouselView
.......................................................................................................................... 133
Section 25.2: Import CarouselView into a XAML Page
.......................................................................................... 133
Chapter 26: Exception handling
........................................................................................................................ 135
Section 26.1: One way to report about exceptions on iOS
.................................................................................... 135
Chapter 27: SQL Database and API in Xamarin Forms.
........................................................................ 137
Section 27.1: Create API using SQL database and implement in Xamarin forms,
.............................................. 137
Chapter 28: Contact Picker - Xamarin Forms (Android and iOS)
.................................................... 138
Section 28.1: contact_picker.cs
................................................................................................................................ 138
Section 28.2: MyPage.cs
........................................................................................................................................... 138
Section 28.3: ChooseContactPicker.cs
.................................................................................................................... 139
Section 28.4: ChooseContactActivity.cs
.................................................................................................................. 139
Section 28.5: MainActivity.cs
.................................................................................................................................... 140
Section 28.6: ChooseContactRenderer.cs
............................................................................................................... 141
Chapter 29: Xamarin Plugin
................................................................................................................................ 144
Section 29.1: Media Plugin
........................................................................................................................................ 144
Section 29.2: Share Plugin
........................................................................................................................................ 146
Section 29.3: ExternalMaps
...................................................................................................................................... 147
Section 29.4: Geolocator Plugin
............................................................................................................................... 148
Section 29.5: Messaging Plugin
............................................................................................................................... 150
Section 29.6: Permissions Plugin
.............................................................................................................................. 151
Chapter 30: OAuth2
................................................................................................................................................. 155
Section 30.1: Authentication by using Plugin
.......................................................................................................... 155
Chapter 31: MessagingCenter
............................................................................................................................. 157
Section 31.1: Simple example
.................................................................................................................................... 157
Section 31.2: Passing arguments
............................................................................................................................. 157
Section 31.3: Unsubscribing
...................................................................................................................................... 158
Chapter 32: Generic Xamarin.Forms app lifecycle? Platform-dependant!
................................ 159
Section 32.1: Xamarin.Forms lifecycle is not the actual app lifecycle but a cross-platform representation of
it
.......................................................................................................................................................................... 159
Chapter 33: Platform-specific behaviour
..................................................................................................... 161
Section 33.1: Removing icon in navigation header in Anroid
................................................................................ 161
Section 33.2: Make label's font size smaller in iOS
................................................................................................ 161
Chapter 34: Platform specific visual adjustments
.................................................................................. 163
Section 34.1: Idiom adjustments
............................................................................................................................... 163
Section 34.2: Platform adjustments
........................................................................................................................ 163
Section 34.3: Using styles
......................................................................................................................................... 164
Section 34.4: Using custom views
............................................................................................................................ 164
Chapter 35: Dependency Services
................................................................................................................... 165
Section 35.1: Access Camera and Gallery
............................................................................................................... 165
Chapter 36: Unit Testing
....................................................................................................................................... 166
Section 36.1: Testing the view models
..................................................................................................................... 166
Chapter 37: BDD Unit Testing in Xamarin.Forms
..................................................................................... 172
Section 37.1: Simple Specflow to test commands and navigation with NUnit Test Runner
.............................. 172
Section 37.2: Advanced Usage for MVVM
.............................................................................................................. 174
Credits
............................................................................................................................................................................ 175
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...................................................................................................................................................... 176
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