LET'S BUILD TOGETHER

https://rocka.co

xergioalex

Sergio A. Florez

TECH LEAD && FULL STACK DEVELOPER

LET'S BUILD TOGETHER

Is a free open-source mobile SDK to create native Android and iOS applications from the same code base

LET'S BUILD TOGETHER

Evolution

Alpha version (2017)

Beta version

(February 2018)

1.0 version

(December 2018)

LET'S BUILD TOGETHER

TYPES OF MOBILE DEVELOPMENT

Native

Hybrid

Cross Platform

LET'S BUILD TOGETHER

Flutter is a

Cross Platform

ย Cross Platform

VS

ย Cross Platform

ENGINE DE RENDERIZADO SKIA2D

LET'S BUILD TOGETHER

ย Cross Platform

LET'S BUILD TOGETHER

LET'S BUILD TOGETHER

Dart is a

multi-paradigm programming language used to code Flutter apps

LET'S BUILD TOGETHER

Mobile

YOU CAN BUILD FULL STACK APPLICATIONS WITH DART

Frontend

Angular Dart

Backend

Server applications

LET'S BUILD TOGETHER

INSTALLATION

LET'S BUILD TOGETHER

VERIFY INSTALLATION

$ flutter doctor

LET'S BUILD TOGETHER

FLUTTER DEMO

FLUTTER PROJECT COMPOSITION

- flutter_app/: Main folder

- android/: Custom configurations for android projects

- ios/: Custom configurations for iOS projects

- pubspec.yaml: This file store special project configurations like assets, external resources, fonts, images, plugins, etc...

- lib/: Flutter code written in Dart

LET'S BUILD TOGETHER

Flutter is inspired by

React

Declarative

Programming

LET'S BUILD TOGETHER

Flutter program structure (lib/)

import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class App extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Home(title: 'Flutter Demo Home Page'),
    );
  }
}
class Home extends StatefulWidget {
  @override
  State<MyHomePage> createState() {
    return _HomeState();
  }
}

Packages

Main Function

StatelessWidget

StatefulWidget

Flutter program structure (lib/)

class _HomeState extends State<HomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: ...,
      body: ...,
      bottomNavigationBar: ...,
      floatingActionButton: ...,
      floatingActionButtonLocation: ...,
    );
  }
}

Scaffold

State

Flutter program structure (lib/)

return Scaffold(
  appBar: ...,
  body: ...,
  bottomNavigationBar: ...,
  floatingActionButton: ...,
  floatingActionButtonLocation: ...,
);

Basic Widgets

Text: https://api.flutter.dev/flutter/widgets/Text-class.html

Text(
  'Hello, $_name! How are you?',
  textAlign: TextAlign.center,
  overflow: TextOverflow.ellipsis,
  style: TextStyle(fontWeight: FontWeight.bold),
)

Row: https://api.flutter.dev/flutter/widgets/Row-class.html

Row(
  children: <Widget>[
    Expanded(
      child: Text('Deliver features faster', textAlign: TextAlign.center),
    ),
    Expanded(
      child: Text('Craft beautiful UIs', textAlign: TextAlign.center),
    ),
    Expanded(
      child: FittedBox(
        fit: BoxFit.contain, // otherwise the logo will be tiny
        child: const FlutterLogo(),
      ),
    ),
  ],
)

Basic Widgets

Column: https://api.flutter.dev/flutter/widgets/Stack-class.html

Column(
  children: <Widget>[
    Text('Deliver features faster'),
    Text('Craft beautiful UIs'),
    Expanded(
      child: FittedBox(
        fit: BoxFit.contain, // otherwise the logo will be tiny
        child: const FlutterLogo(),
      ),
    ),
  ],
)

Stack: https://api.flutter.dev/flutter/widgets/Stack-class.html

Stack(
  children: <Widget>[
    Container(
      width: 100,
      height: 100,
      color: Colors.red,
    ),
    Container(
      width: 90,
      height: 90,
      color: Colors.green,
    ),
  ],
)

Basic Widgets

Container

Center(
  child: Container(
    margin: const EdgeInsets.all(10.0),
    color: Colors.amber[600],
    width: 48.0,
    height: 48.0,
  ),
)

Widgets Types

2 Types

StatefulWidgets: is dynamic, it can change its appearance and value in response to events triggered by user interactions.

- Sliders

- Checkbox

- Radio

- Forms

Widgets Types

2 Types

StatelessWidgets: A widget that does not require mutable state. Is a widget that describes part of the user interface.

- Icons

- Texts

- Container

- Row

- Column

Everythingโ€™s a Widget

Layout Widget

Demo Time

Links

Documentation

Platzi Flutter Course

DartPad

Flutter Theme

LET'S BUILD TOGETHER

https://rocka.co

xergioalex

Sergio A. Florez

TECH LEAD && FULL STACK DEVELOPER

Let's talk about Flutter ๐Ÿ˜Ž

By Sergio Alexander Florez Galeano

Let's talk about Flutter ๐Ÿ˜Ž

Just an introduction to mobile development at Android && iOS using Flutter SDK.

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