101 Flutter - Learn2Code Series

Flutter is a popular open-source framework for building mobile applications for iOS and Android. It is based on the Dart programming language, which was developed by Google.

Here's a tutorial that will help you get started with building your first app using Flutter:

First, you'll need to install the Flutter SDK and set up your development environment. You can find detailed instructions for doing this on the official Flutter website: https://flutter.dev/docs/get-started/install

Next, create a new Flutter project by running the following command in your terminal:

flutter create my_first_app

Once the project is created, navigate to the project directory by running:

cd my_first_app

Now you can run the app on an emulator or physical device by running the following command:

flutter run

Your new Flutter app should now be running on the device or emulator. You can make changes to the code in the lib/main.dart file and see the changes reflected in the app by running flutter run again.

To make your first change, you can replace the contents of the lib/main.dart file with the following code:

import 'package:flutter/material.dart';

void main() {

runApp(MyApp());

}

class MyApp extends StatelessWidget {

@override

Widget build(BuildContext context) {

return MaterialApp(

title: 'Welcome to Flutter',

home: Scaffold(

appBar: AppBar(

title: Text('Welcome to Flutter'),

),

body: Center(

child: Text('Hello World'),

),

),

);

}

}

This code creates a simple "Hello World" app with a single text element on the screen.

For the next step, you can explore the documentation to understand more about flutter widgets and other concepts, this link will help you get started : https://flutter.dev/docs/get-started/codelab

Also you can find many tutorials and articles on flutter which will help you understand more concepts and how to build more advanced apps.

I hope this helps you get started with building your first app also get to know deeper in architecture also helps you to think deeper,

Flutter Architecture Deep Dive

It uses the Dart programming language and is built on top of the Skia graphics engine. One of the key features of Flutter is its use of a reactive programming model, which allows developers to build apps that are highly responsive and easy to maintain.

The architecture of a Flutter app typically consists of a few key components:

The main() function: This is the entry point of the app and is where the runApp() method is called to initialise the app.

The MaterialApp or CupertinoApp widget: This is the top-level widget in the app and serves as the container for all other widgets. It typically sets up the app's navigation, theme, and other core settings.

The StatelessWidget and StatefulWidget classes: These are the building blocks of a Flutter app, and are used to create the app's user interface. A StatelessWidget is a widget that will not change over time, while a StatefulWidget can change its state and therefore re-render.

The BuildContext: This is an object that is passed around the widget tree and contains information about the location of a widget in the tree. It's used to build and rebuild the widget.

The State object: This is an object associated with a StatefulWidget that holds the mutable state for that widget.

The Scaffold widget: This is a convenience widget that provides a visual structure for an app and allows developers to easily add a navigation bar, drawer, and other common elements to the app.

Flutter also comes with a set of built-in widgets that can be used to build an app's user interface, such as Text, Button, Image, and many more. Additionally, there are a large number of third-party packages that can be used to add additional functionality to a Flutter app, such as networking, database access, and more.

Overall the architecture of Flutter is designed to be efficient and fast with high performance. Making use of widgets and dart language with reactive programming makes it easier to built mobile applications.