Team Technologies LLC

OlegMobile Developer

NazarMobile Developer

Лекція №8 від провідних .NET розробників з

Developing Cross-Platform Applications

Agenda• Why Native? • What is Xamarin? • Architecting Mobile Apps • Xamarin Forms • Demo

Why Native?

The Anatomy of a Native App

Xamarin apps look and feel native because they are native

Native User Interfaces Native API Access Native Performance

Cross-Platform Mobile Development

• Building high-quality Apps is hard:

• Different presentation styles, interaction styles and software stacks • Devices have different screen sizes, input modes and hardware capabilities • New devices and OS versions are introduced multiple times per year • Network connectivity and power levels

fluctuate widely in typical usage scenarios • New consumer applications regularly

extend and revise the standards andset the bar higher for good mobile applications

Xamarin.iOS does full Ahead Of Time (AOT) compilation to produce an ARM binary for Apple’s App Store.

Xamarin.Android takes advantage of Just In Time (JIT) compilation on the Android device.

What is Xamarin?

Xamarin brings open source .NET to mobile development, enabling every developer to build truly native apps for any device in C# and F#.

What is Xamarin?

What is Xamarin?

Make it fast, easy and fun to create great mobile apps

Xamarin’s Mission

Xamarin Mobile Lifecycle

Architecting Mobile Apps

Build App Multiple Times

• Expensive to staff multiple platform-specific teams

• Expensive to maintain multiple code bases

• Slows innovation

The Write-Once-Run-Anywhere Approach

• Non-standart UI • Limited API access • Non-native performance • Poor user experience

Xamarin’s Unique Approach

Native With Code Sharing

Xamarin Designer for iOS in Xamarin Studio

Anything you can do in Objective-C or Java can be done in C# with Xamarin using Visual Studio

Xamarin Forms

Portable Class Libraries

Xamarin Architecture Choices

Xamarin.Forms

Quickly and easily build native user interfaces using shared code

Xamarin.Forms elements map to native controls and behaviors

Mix-and-match Xamarin.Forms with native APIs Shared App Logic

Shared UI Code

Pages

Content MasterDetail Navigation Tabbed Carousel

Layouts

Stack Absolute Relative Grid ContentView ScrollView Frame

Controls

ActivityIndicator BoxView Button DatePicker Editor

Entry Image Label ListView Map

OpenGLView Picker ProgressBar SearchBar Slider

Stepper TableView TimePicker WebView EntryCell

ImageCell SwitchCell TextCell ViewCell

NuGet Package Manager

NuGet support combined with the Xamarin Component Store gives Xamarin developers the most comprehensive ecosystem of libraries at their fingertips

Why Xamarin?

Better Mobile Productivity

Event Tracking

Issue Tracking

Issue Tracking

Issue Tracking - Detail

Issue Tracking – Device & User Data

Demo

Q & A