A presentation at Paris Flutter Meetup in in Paris, France by Horacio Gonzalez
Codelab Flutter Android Makers 2019 Romain Rastel - Horacio Gonzalez - Pierre Tibulle @lets4r @LostInBrittany @ptibulle
Who are we? And what’s that Breizh thing? @lets4r @LostInBrittany @ptibulle
Romain Rastel https://github.com/letsar https://medium.com/@lets4r @lets4r Flutter Lead Expert @lets4r @LostInBrittany @ptibulle
Horacio Gonzalez @LostInBrittany Spaniard lost in Brittany, developer, dreamer and all-around geek Flutter @lets4r @LostInBrittany @ptibulle
Pierre Tibulle @ptibulle Developer, Jobcrafter, Maker and sketchnoter ! @lets4r @LostInBrittany @ptibulle
Before we begin… Did you follow the instructions? @lets4r @LostInBrittany @ptibulle
Before we begin For this codelab, you need a laptop with an operational Flutter environment : ● ● ● https://flutter.io/docs/get-started/install https://flutter.io/docs/get-started/editor https://flutter.io/docs/get-started/test-drive If you get this => It’s OK 👌 If you don’t, find a pair !!! @lets4r @LostInBrittany @ptibulle
Testing your install Create and test your first app https://flutter.io/get-started/test-drive/ @lets4r @LostInBrittany @ptibulle
What’s Flutter? Yet another mobile solution? @lets4r @LostInBrittany @ptibulle
Flutter Flutter is Google’s new open-source mobile UI toolkit, helping developers to craft high-quality native experiences across mobile platforms in record time @lets4r @LostInBrittany @ptibulle
Flutter Flutter is Google’s new open-source mobile UI toolkit, helping developers to craft high-quality native experiences across mobile platforms in record time @lets4r @LostInBrittany @ptibulle
Flutter Flutter is Google’s new open-source mobile UI toolkit, helping developers to craft high-quality native experiences across mobile platforms in record time @lets4r @LostInBrittany @ptibulle
Flutter Flutter is Google’s new open-source mobile UI toolkit, helping developers to craft high-quality native experiences across mobile platforms in record time @lets4r @LostInBrittany @ptibulle
Flutter Flutter is Google’s new open-source mobile UI toolkit, helping developers to craft high-quality native experiences across mobile platforms in record time @lets4r @LostInBrittany @ptibulle
Flutter Flutter is Google’s new open-source mobile UI toolkit, helping developers to craft high-quality native experiences across mobile platforms in record time @lets4r @LostInBrittany @ptibulle
Flutter Flutter is Google’s new open-source mobile UI toolkit, helping developers to craft high-quality native experiences across mobile platforms in record time @lets4r @LostInBrittany @ptibulle
Flutter Flutter is Google’s new open-source mobile UI toolkit, helping developers to craft high-quality native experiences across mobile platforms in record time @lets4r @LostInBrittany @ptibulle
Looking back Diving into the history of mobile app development @lets4r @LostInBrittany @ptibulle
At the beginning there were the SDKs Your app Platform Canvas OEM Widgets Events Services Native Code @lets4r Location Bluetooth Audio Sensors Camera etc, @LostInBrittany @ptibulle
Then the Webviews… Your app Platform Canvas WebView Events Services Bridge JavaScript @lets4r Location Bluetooth Audio Sensors Camera etc, @LostInBrittany @ptibulle
And the Reactive views Your app Platform Canvas JavaScript @lets4r Bridge OEM Widgets Events Services Location Bluetooth Audio Sensors Camera etc, @LostInBrittany @ptibulle
Enter Flutter Your app Platform Canvas Widgets, Rendering Events Services Native Code Platform Channels @lets4r Location Bluetooth Audio Sensors Camera etc, @LostInBrittany @ptibulle
Flutter architecture @lets4r @LostInBrittany @ptibulle
But why Dart? Because Google, duh! …or maybe there are good reasons? @lets4r @LostInBrittany @ptibulle
Dart can be compiled AOT or JIT Development builds: Release builds: Custom VM offers super fast hot reload change cycle @lets4r Full AOT-compilation to native machine code offers super fast startup and execution @LostInBrittany @ptibulle
Dart’s allocation and GC ● Many new objects: ○ Lock-free, fast allocation ● Short-lived objects: ○ Precise, generational garbage collection @lets4r @LostInBrittany @ptibulle
Dart is an easy, familiar language An easy language: ● No exotic syntax ● Easy to read, easy to write ● Very expressive A familiar language: ● JavaScript devs find it easy to learn ● Java / C# devs even more @lets4r @LostInBrittany @ptibulle
Layout How Flutter does layout? CSS like? XML like? @lets4r @LostInBrittany @ptibulle
Traditional rule based layouts Large set of rules ● Fixed ● Applied to all the widgets Cascading application ● Interactions & conflicts ● Low performance @lets4r @LostInBrittany @ptibulle
Chrome team experiment Could a different layout model allow faster rendering? ● Each widget specifies its own simple layout model ● Less rules, heavily optimized ● Complex layouts are turned into widgets @lets4r @LostInBrittany @ptibulle
Everything is a widget Layouts Margin Padding Themes Application are widgets even scrolling is a widget! Navigation @lets4r @LostInBrittany @ptibulle
Le Layout @lets4r @LostInBrittany @ptibulle
Le Layout @lets4r @LostInBrittany @ptibulle
Le Layout class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { Widget titleSection = new Container( padding: const EdgeInsets.all(32.0), child: new Row( children: [ new Expanded( child: new Column( crossAxisAlignment: CrossAxisAlignment.start, children: [ new Container( padding: const EdgeInsets.only(bottom: 8.0), child: new Text( ‘Oeschinen Lake Campground’, style: new TextStyle( fontWeight: FontWeight.bold, ), ), ), new Text( ‘Kandersteg, Switzerland’, style: new TextStyle( color: Colors.grey[500], ), ), ], ), ), new Icon( Icons.star, color: Colors.red[500], ), new Text(‘41’), ], ), ); } @lets4r @LostInBrittany @ptibulle
Le Layout class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { Widget titleSection = new Container( padding: const EdgeInsets.all(32.0), child: new Row( children: [ new Expanded( child: new Column( crossAxisAlignment: CrossAxisAlignment.start, children: [ new Container( padding: const EdgeInsets.only(bottom: 8.0), child: new Text( ‘Oeschinen Lake Campground’, style: new TextStyle( fontWeight: FontWeight.bold, ), ), ), new Text( ‘Kandersteg, Switzerland’, style: new TextStyle( color: Colors.grey[500], ), ), ], ), ), new Icon( Icons.star, color: Colors.red[500], ), new Text(‘41’), ], ), ); } @lets4r @LostInBrittany @ptibulle
Widget Inspector @lets4r @LostInBrittany @ptibulle
Responsive ? @lets4r @LostInBrittany @ptibulle
Responsive ! Scaffold Scaffold Row ListView GridView @lets4r @LostInBrittany @ptibulle
Gestion des thèmes @lets4r @LostInBrittany @ptibulle
Material Design 2.0 @lets4r @LostInBrittany @ptibulle
Blazing fast and flexible layouts @lets4r @LostInBrittany @ptibulle
Why to choose Flutter? OK, so it’s a new technology to build mobile apps, rather cool, yeah… but why should I choose it? @lets4r @LostInBrittany @ptibulle
Why choose Flutter? Beautiful Productive Fast @lets4r Extensible @LostInBrittany @ptibulle
Beautiful Control every pixel on the screen Make your brand come to life Never say “no” to your designer Stand out in the marketplace Win awards with beautiful UI @lets4r @LostInBrittany @ptibulle
Fast Brings the power of a games engine to user experience development 60fps, GPU accelerated Compiled to native machine code @lets4r @LostInBrittany @ptibulle
Productive Sub-second reload times Paint your app to life Iterate rapidly on features Test hypotheses quicker than ever More time to experiment & test features Single-codebase for faster collab 3X Productivity Gains @lets4r @LostInBrittany @ptibulle
Extensible Everything is free and open source Layered architecture: easy to extend Deep platform integrations Hundreds of third-party packages (ads, videos, database, cloud etc.) @lets4r @LostInBrittany @ptibulle
A wonderful time to begin with Flutter Flutter is getting momentum! @lets4r @LostInBrittany @ptibulle
Flutter is on the starting blocks Version 1.0 released last December @lets4r @LostInBrittany @ptibulle
Getting momentum StackOverflow Question Views @lets4r @LostInBrittany @ptibulle
Integration with popular tools 3rd-party Android SDKs Android Studio Xcode VS Code Firebase 3rd-party iOS SDKs Android APIs @lets4r iOS APIs Material Design @LostInBrittany Redux @ptibulle
And now, let’s code! TL;DR: We have spoken too much, now it’s your turn @lets4r @LostInBrittany @ptibulle
Let’s go ! Wifi : LeBeffroi or 4G Codelab : https://ptibulle.github.io/#0 Sources : https://github.com/ptibulle/flutter_breizh @lets4r @LostInBrittany @ptibulle
Thank you! @lets4r @LostInBrittany @ptibulle
Flutter est un SDK open-source pour créer des application iOS et Android performantes et adaptées à l’OS. ‘Un peu comme React Native ou Xamarin ?’ vous pourriez vous demander ? Oui, un peu… mais avec une intégration avec les widgets natifs et des niveaux de performance qui vont au delà de ce que Xamarin ou React Native peuvent proposer, le tout avec très peu de lignes de code.
Dans ce bootcamp nous allons faire une introduction pratique à Flutter. Et lorsque je dis pratique, c’est du pratique, vous allez coder… Vous arrivez à la séance équipés d’un ordinateur portable, avec Android Studio ou VS Code et vous partez à la fin en ayant développé une petite application Flutter tournant sur Android et iOS, et plus important encore, en ayant intégré les principes basiques du développement sur cette plate-forme.
Le Bootcamp Flutter est donc une introduction accélérée et pratique au développement d’applications mobiles avec Flutter. Vous allez apprendre, mettre les mains dans le cambouis, coder et vous allez enfin cocher la case “Apprendre à coder des applications mobiles” dans votre ToDo-list.
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