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Xamarin: Cross-Platform Mobile Application Development
Table of Contents
Xamarin: Cross-Platform Mobile Application Development
Xamarin: Cross-Platform Mobile Application Development
Credits
Preface
What this learning path covers
What you need for this learning path
Module 1:
Module 2:
Module 3:
Who this learning path is for
Reader feedback
Customer support
Downloading the example code
Errata
Piracy
Questions
1. Module 1
1. Setting Up Xamarin
The Xamarin tools
Installing Xcode
Installing Xamarin
Choosing a Xamarin license
Setting up the Android emulator
Enrolling in the iOS Developer Program
Registering as a Google Play developer
Summary
2. Hello, Platforms!
Building your first iOS application
Understanding Apple's MVC pattern
Using the iOS designer
Building your first Android application
Android activities
Xamarin's Android designer
Summary
3. Code Sharing between iOS and Android
Learning the MVVM design pattern
Implementing MVVM in an example
Comparing project organization strategies
Setting up a cross-platform solution
Working with Portable Class Libraries
Using PCLs in Xamarin
Using preprocessor statements
Simplifying dependency injection
Implementing Inversion of Control
Summary
4. XamChat – a Cross-platform App
Starting our sample application concept
Developing our Model layer
Writing a mock web service
Writing the ViewModel layer
Implementing our LoginViewModel class
Implementing our RegisterViewModel class
Implementing our FriendViewModel class
Implementing our MessageViewModel class
Writing unit tests
Setting up a new project for unit tests
Writing assertions
Summary
5. XamChat for iOS
Understanding the basics of an iOS app
Using UINavigationController
Methods in Navigation Controllers
Setting up a Navigation Controller
Implementing the login screen
Creating a LoginController class
Modifying the controller's layout
Registering and subscribing view models and services
Using segues and UITableView
Adding a friends list screen
Adding a list of messages
Composing messages
Summary
6. XamChat for Android
Introducing Android Manifest
Setting up the Manifest
Common manifest permissions
Creating and implementing the application class
Adding a login screen
Layouts and ViewGroups in Andorid
Implementing the login functionality
Using ListView and BaseAdapter
Implementing the conversations screen
Setting up the adapter
Implementing the friends list
Composing messages
Summary
7. Deploying and Testing on Devices
iOS provisioning
Prerequisites for deploying to iOS
Creating a provisioning profile
Android device settings
Understanding the linker
Understanding AOT compilation
Avoiding common memory pitfalls
Garbage collector
Memory leaks
Accessing objects disposed by GC
Summary
8. Web Services with Push Notifications
Learning Windows Azure
Setting up your Azure account
Exploring Azure Mobile Services
Creating tables and scripts
Adding a backend to XamChat
Adding the Azure Mobile Services NuGet package
Using the Apple Push Notification service
Setting up proper provisioning
Setting up your provisioning profile
Setting up a certificate signing request
Making client-side changes for push notifications
Implementing Google Cloud Messaging
Summary
9. Third-party Libraries
The Xamarin Component Store
The most common components
Porting existing C# libraries
Objective-C bindings
Working with Objective Sharpie
Java bindings
Summary
10. Contacts, Camera, and Location
Introducing Xamarin.Mobile
Accessing contacts
Retrieving contacts on Android
Looking up GPS location
Implementing GPS location on Android
Accessing the photo library and camera
Accessing photos on Android
Summary
11. Xamarin.Forms
Creating Hello World in Xamarin.Forms
Understanding the architecture behind Xamarin.Forms
Using XAML in Xamarin.Forms
Using data binding and MVVM
Summary
12. App Store Submission
Following the iOS App Store Review Guidelines
General rules
Incorrect and incomplete information
Content present in the application
Apple's 70/30 revenue share
General Tips
Submitting an app to the iOS App Store
Creating a distribution provisioning profile
Adding your app to iTunes Connect
Making an iOS binary for the App Store
Signing your Android applications
Submitting the app to Google Play
Google Play Developer Program Policies
Tips to make a successful mobile app
Summary
2. Module 2
1. One Ring to Rule Them All
Introduction
Creating a cross-platform solution
Getting ready
How to do it...
How it works…
See also
Creating a cross-platform login screen
How to do it...
How it works…
There's more…
Using common platform features
How to do it...
How it works…
See also
Authenticating with Facebook and Google providers
How to do it...
For the Android project
For the iOS project
How it works…
See also
2. Declare Once, Visualize Everywhere
Introduction
Creating a tabbed-page cross-platform application
How to do it…
How it works…
See also
Adding UI behaviors and triggers
How to do it…
How it works…
See also
Configuring XAML with platform-specific values
How to do it…
How it works…
See also
Using custom renderers to change the look and feel of views
How to do it…
How it works…
See also
3. Native Platform-Specific Views and Behavior
Introduction
Showing native pages with renderers
How to do it…
How it works…
See also
Attaching platform-specific gestures
How to do it…
How it works…
See also
Taking an in-app photo with the native camera page
How to do it…
How it works…
See also
4. Different Cars, Same Engine
Introduction
Sharing code between different platforms
How to do it…
How it works…
See also
Using the dependency locator
How to do it…
How it works…
See also
Adding a third-party Dependency Injection Container
How to do it…
How it works…
See also
Architecture design with Model-View-ViewModel (MVVM) pattern
How to do it…
How it works…
There's more…
See also
Using the event messenger
How to do it…
How it works…
See also
Adding localization
How to do it…
How it works…
There's more…
5. Dude, Where's my Data?
Introduction
Creating a shared SQLite data access
How to do it…
How it works…
See also
Performing CRUD operations in SQLite
How to do it…
How it works…
See also
Consuming REST web services
How to do it…
How it works…
Leveraging native REST libraries and making efficient network calls
How to do it…
How it works…
There's more…
6. One for All and All for One
Introduction
Creating cross-platform plugins
How to do it...
How it works…
There's more…
See also
Taking or choosing photos
How to do it…
How it works…
There's more…
See also
Getting the GPS location
How to do it…
How it works…
See also
Show and schedule local notifications
How to do it…
How it works…
There's more…
7. Bind to the Data
Introduction
Binding data in code
How to do it…
How it works…
Binding data in XAML
How to do it…
How it works…
Configuring two-way data binding
How to do it…
How it works…
See also
Using value converters
How to do it…
How it works…
See also
8. A List to View
Introduction
Displaying a collection and selecting a row
How to do it…
How it works…
See also
Adding, removing, and refreshing items
How to do it…
How it works…
There's more…
See also
Customizing the row template
How to do it…
How it works…
There's more…
See also
Adding grouping and a jump index list
How to do it…
How it works…
There's more…
See also
9. Gestures and Animations
Introduction
Adding gesture recognizers in XAML
How to do it…
How it works…
There's more…
See also
Handling gestures with native platform renderers
How to do it…
How it works…
Adding cross-platform animations
How to do it…
How it works…
There's more…
10. Test Your Applications, You Must
Introduction
Creating unit tests
How to do it…
How it works…
Creating acceptance tests with Xamarin.UITest
How to do it…
How it works…
There's more…
See also
Using the Xamarin.UITest REPL runtime shell to test the UI
How to do it…
How it works…
See also
Uploading and running tests in Xamarin Test Cloud
How to do it…
How it works…
There's more…
See also
11. Three, Two, One – Launch and Monitor
Introduction
Using Xamarin Insights
How to do it…
How it works…
There's more…
Publishing iOS applications
How to do it…
How it works…
Publishing Android applications
How to do it…
How it works…
There's more…
See also
Publishing Windows Phone applications
How to do it…
How it works…
There's more…
3. Module 3
1. Developing with Xamarin
Cross-platform projects with Xamarin
Xamarin as a platform
Xamarin as a product
Target platforms
Xamarin on Android
Xamarin on iOS
Windows Runtime apps
Setting up the development environment
Choosing the right development OS
Xamarin Studio setup and configuration
Visual Studio setup and configuration
Emulator options
Emulators for Android
iOS emulation
A typical Xamarin solution structure
Portable class libraries
Shared projects
Xamarin.Forms
NuGet packages
Components
Quality in cross-development
Reusability
Abstraction
Loose-coupling
Nativity
Summary
2. Memory Management
Application Component lifecycle
Activity lifecycle (Android)
Active/Running
Paused
Backgrounded
Stopped
Restarted
Application lifecycle (iOS)
Garbage collection
GC on Xamarin projects
SGen garbage collector
Boehm garbage collector (iOS only)
Platform-specific concepts
Object reference types
Automatic Reference Counting (ARC)
Troubleshooting and diagnosis
Xamarin Profiler
Allocations instrument
Time Profiler
Device Monitor (Android only)
Instruments (iOS only)
Monotouch Profiler (iOS only)
Patterns and best practices
Disposable objects
The lapsed listener problem
Weak references
Cross-domain objects
Cyclic references (cycles)
Summary
3. Asynchronous Programming
Multithreading on Xamarin
Single thread model
Task-based Asynchronous Pattern
Concurrency model on iOS
Asynchronous methods
Continuation
Cancellation
Progress
Task batches
Parallel execution
Patterns and best practices
Async pattern conversions
Multi-threading with tasks
Exception handling
Initialization pattern
Semaphores
Background tasks
Background tasks on iOS
Services (Android only)
Summary
4. Local Data Management
Data in mobile applications
State
App data
Local files
External data
Application data
Installation directory
Android
iOS
Local storage
Android
iOS
Temporary storage
Local filesystem
SQLite
Patterns and best practices
Application preferences
File picker
Backup/Roaming
Android and Backup API
iOS and ubiquitous storage
Summary
5. Networking
Connected apps
Web services
Transport
Messaging
SOAP/XML services
RESTful services
OData and OAuth
OData
OAuth
SignalR
Patterns and best practices
Async conversions
Data model abstraction
Service cache
Platform-specific concepts
Permissions
NSUrlConnection/NSUrlSession (iOS Only)
Background downloads
Push notifications
Cloud integration
Azure Mobile Services
Azure offline data
Azure authentication
Summary
6. Platform Extras
Content sharing
File pickers and contracts (Windows Store apps)
Document Provider extensions (iOS)
ContentProvider and ContentResolver (Android)
Peripherals
Bluetooth
Wi-Fi Direct
Near Field Communication
Location data
Android location and Google Play services
Location services on iOS
Location data on Windows Runtime
Geofencing
Native libraries
Managed callable wrappers (Android)
Linking versus binding (iOS)
Summary
7. View Elements
Design philosophy
User expectations
Platform imperatives
Hardware dependency
Design metrics on Android
Design metrics on iOS
Design metrics on Windows Runtime
Design elements
The basic layout
Navigation
Horizontal navigation
Vertical navigation
Jump navigation
Content elements
Collection views
UITableView (iOS)
UICollectionView (iOS)
ListView (Android)
GridView (Android)
CardView (Android)
ListView and ListBox (Windows Phone)
GridView (Windows Phone)
Virtualizing panels (Windows Phone)
Modal views
Popover and alerts (iOS)
Flyout, popups, and menus (Windows Phone)
Dialogs (Android)
Text views
Web views
Feedback
Indeterminate progress
Determinate progress
User interaction
Interactive controls
Text input
Dropdown selection
Option selection
Gestures
Summary
8. Xamarin.Forms
Under the hood
Anatomy of Xamarin.Forms
Project structure
Components
Pages
Tabbed page
The MasterDetail page
NavigationPage
CarouselPage
ContentPage
Layouts
Views
Extending forms
Styles
Triggers and behaviors
Custom renderers
Patterns and best practices
Messaging infrastructure
Dependency injection
Shared project versus portable project
Platform-specific fine-tuning
Summary
9. Reusable UI Patterns
Visual assets
Text resources
Xamarin.Android
Xamarin.iOS
Windows Phone
Image resources
Adaptive visual assets
Reusable assets
Localization
Locale and culture
Windows Phone
Xamarin.iOS
Xamarin.Android
Xamarin.Forms
Architectural patterns
MVC
iOS app architecture
MVVM
Windows Runtime
MVVM on Xamarin.iOS and Xamarin.Android
MVVM with Xamarin.Forms
Summary
10. ALM – Developers and QA
Development pipeline
Troubleshooting and diagnostics
Unit testing
Platform-agnostic unit tests
Platform-specific unit tests
UI testing
Xamarin.UITests and Xamarin Test Cloud
Xamarin Test Recorder
Coded UI tests (Windows Phone)
Calabash
Summary
11. ALM – Project and Release Management
Source control
TFVC
Git
TFS/Git scenarios
Git bridge
NuGet packages
Subversion (SVN)
Continuous integration
Visual Studio Team Services
TeamCity
Other
Automated testing
Beta deployment
HockeyApp
Crashlytics
TestFlight
Package distribution
Live telemetry
Xamarin Insights
Application Insights
Summary
12. ALM – App Stores and Publishing
Release packages
Xamarin.Android app package (.apk)
Disabling debugging
Linking
Packing options
Packaging
Xamarin.iOS app bundle (.ipa)
Build options
Linking
Provisioning profile
Windows Phone app package (.appx)
Distribution options
App store(s)
Ad-hoc
Line of Business apps
Private channel distribution (Android)
Apple Developer Enterprise Program
Windows Phone private distribution
Summary
A. Bibliography
Index
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