Architecting Cloud Connected Mobile Apps

Nish Anil

Microsoft MVP .NET & a Xamarin Evangelist! @nishanil | nish@xamarin.com

Mobile Apps Target 3 platforms (iOS, Android, Windows Phone)

Create Native User Interface (iOS != Android != Windows Phone)

Provide Platform specific User Experience

High Performance

Scalable

Xamarin

Xamarin.Forms

Shared UI Code!

traditional ui code sharing with all native

Code Sharing?

Platform Divergence Platforms differ, even in subtle ways

File locations for DBs, etc.

Some shared code needs to be platform-aware

Devices differ widely, even within a platform

Hardware Features: camera, compass, NFC

Form Factor: Screen size, ratio, density

So?

X-Plat Architecture

Whats a Pattern?

Patterns Vocabulary Singleton

Faade (or Manager)

Provider (also, Simple Dependency)

Model View ViewModel (MVVM)

Model View Controller (MVC)

Singleton

Facade

Provider

MVC

MVVM

Project Structure

Demo!

public class ExpenseItem { [PrimaryKey, AutoIncrement] public int ID { get; set; } public string Name { get; set; } public double Amount { get; set; }

}

Model

public List Expenses

Scale!

Cloud Connected Apps

Azure

Parse

Initialize

await a list of data

await inserting a new object

Demo!

http://xhackers.co/xhacknight/

Questions?@nishanil | nish@xamarin.com

Thanks!