Flutter tutorial: Step by Step Guide

Flutter is Google’s portable user interface toolkit for building attractive native mobile, web, and desktop apps from a single codebase. Flutter is widely utilised by developers and organisations worldwide and is completely free and open source.

Flutter reduces app development barriers. It expedites app creation while cutting the cost and burden of application development. Flutter serves as a canvas for designers to create high-end user experiences for their clients. Flutter is a framework that allows developers to transform thoughts into production code without making tradeoffs inherent in traditional frameworks. In addition to supporting device-run mobile applications, Flutter enables interactive apps to run on web pages or computers. Flutter supports unit creation and integration tests using APIs.

This is a flutter tutorial for beginners to get accustomed to the basics of Flutter Development.

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Installing Flutter on your Device

First, we shall install Flutter on our device to start with the Flutter tutorial. Flutter is accessible on both Windows and macOS.

To install the Flutter Software Development Kit on Windows, follow the steps below:

• Head over to https://docs.flutter.dev/get-started/install/windows to download the latest version of Flutter.
• Next, unzip the zip file and put Flutter in the installation folder where you want Flutter SDK to be installed.
• The flutter bin directory should now be included in the system path using the Command Prompt.
• Flutter supplies an instrument known as the flutter doctor to ensure that all the requirements for flutter development are satisfied.
• Install the latest version of the Android Software Development Kit and the most recent version of Android Studio.
• For Android Studio, add the Flutter and Dart plugins. It offers the resources for a new Flutter application.
• Now restart Android Studio.

To install the Flutter Software Development Kit on macOS, follow the steps below:

• Head over to https://docs.flutter.dev/get-started/install/macos to download the latest version of Flutter.
• Unzip the zip file and put Flutter in the installation folder where you want Flutter SDK to be installed.
• The flutter bin directory should now be included in the system path using the Terminal Prompt.
• You have to install the most recent version of XCode.
• You have to install the latest version of the Android Software Development Kit and the most recent version of Android Studio.
• To create an iOS application, you may use an iOS simulator or a real iPhone connected to your computer.
• For Android Studio, add the Flutter and Dart plugins that offer the resources for a new Flutter application.
• You now have to restart Android Studio.

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Container Class in Flutter

Using flutter’s Container class, you can combine the common styling, placement, and scaling of widgets into one easy-to-use widget. Use a Container class to store widgets and place them on the screen as desired. The margin divides the current container from additional contents in a basic container element. A border will appear on the whole container, such as rounded rectangles or squares. The container limits the amount of padding surrounding the child.

Material Design in Flutter

Adaptable standards, elements, and tools to support the best practices of UI design are provided by Material’s framework. In addition, design and development teams may work together more easily using material based on open source technology.

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Basic Widgets in Flutter

Widgets are the primary class hierarchy using the Flutter framework. One of the most fundamental concepts in user interface design is the widget. Inflating widgets into elements can manage the underlying render tree.

There are two types of widgets in Flutter:

• Stateful Widgets
• Stateless Widgets

State-full widgets are aware of changes in their surroundings and are automatically recreated if they detect a change in status. On the other hand, stateless widgets are unaffected by changes in the environment and maintain their state throughout their lifespan.

Drawer Widget

Navigating through Material Design-based smartphone applications is a two-step process. Tabs and Drawers make up these navigations. Since mobile applications may not have enough room for tabs, you can find tab alternatives in a drawer.

A drawer serves as a kind of “hidden” screen. If it is visible, it takes up half of the screen and is a menu that slides left. It comprises the app’s most useful links and options.

AppBar Widget

The AppBar is the app’s most prominent component, and it includes the app’s toolbar and various other features.

RichText Widget

RichText is a widget for displaying text in a variety of ways.

Provider Package in Flutter

The provider package wraps Inherited Widgets in an easier-to-use interface to make it user-friendly. This state management strategy implies easy data management on apps. To know more about the provider package, you can simply search for a flutter provider tutorial on the Internet.

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Advantages of Using Flutter

Flutter has major advantages for developing new applications. A few of these advantages are listed below:

• Streamlined Development: Flutter features can be characterised as “clean” or “convenient.” As a result of significant CPU pressure, extra elements are required, adding to the time it takes to complete the task.

Flutter came up with a solution to this issue through the ListView, which shows lists at fast speeds straight out of the box, making Flutter time-efficient.

• Exceptional Interface: Screen personalisation is the most remarkable feature of Flutter. Native platforms make it far more difficult to generate such a viewpoint. You may experiment with colour, shape, and shadows to your heart’s content and crop or change images with ease.
• Personalised Engine for Rendering: You may design platform-independent user interfaces using the native rendering engine. Due to rendering, issues often hinder the platform widget’s property layer and framework data synchronisation. On the other hand, Flutter simplifies the process without a specialised user interface component.
• Live Hot Reload: Flutter chose to use its strengths, implementing a unique live hot reload functionality. Developers previously had to create specific code, compile it, and then download it to the device (or use a stimulator) to view the code modifications. The developer may simply update the plugins without waiting for the code compilation. However, with Flutter, you can view the changes on the fly or fix errors without restarting the app.

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Conclusion

Though this was a flutter tutorial for beginners, the apps you can build with Flutter are unfathomable. Flutter framework performs a fantastic job building genuine platform-agnostic mobile apps. New developers will soon be able to create feature-rich mobile applications thanks to the Flutter framework’s simple development process, and high-performance mobile applications, and engaging user interfaces for Android and iOS.