Flutter
This Flutter Tutorial is specifically designed for beginners and well-seasoned professionals. It covers both the basic and advanced concepts of the Flutter framework.
Flutter – Basics
In this section, you’ll learn the fundamentals of Flutter. Flutter is a toolkit developed by Google that lets developers build apps for mobile, web, and desktop platforms using the same code.
It uses the Dart programming language and comes with ready-to-use widgets for developing user interfaces.
Flutter’s special feature, hot reload, allows developers to see changes in real time as they code, making development faster.
Flutter – Widgets
In this section, you will explore Flutter widgets, which are pre-built components which are used to construct user interfaces in Flutter applications.Flutter
Widgets in Flutter are versatile and flexible, ranging from basic components like buttons and text fields to complex layouts and animations.
Flutter provides a rich library of inbuilt widgets that developers can use directly or customize to suit specific design requirements.
Flutter | An introduction to the open source SDK by Google
Flutter is Google’s Mobile SDK to build native iOS and Android, Desktop (Windows, Linux, macOS), and Web apps from a single codebase.
When building applications with Flutter, everything towards Widgets – the blocks with which the flutter apps are built. They can be structural elements that ship with a bunch of material design-specific functionalities, and new widgets can be composed out of existing ones too.
The User Interface of the app is composed of many simple widgets, each of them dedicated to one particular job. That is the reason Flutter developers tend to think of their flutter app as a tree of widgets.
Crowd
This instructional exercise is ready for experts who are seeking to make a long-term career in the field of versatile applications. This instructional exercise is expected to make you agreeable in getting everything rolling with Ripple system and its different functionalities.
Essentials
This instructional exercise is composed expecting that the people reading it are as of now mindful about what a System is, and that the people reading it have sound information on Item Situated Programming and fundamental information on Android structure and Dart programming. On the off chance that you are a fledgling to any of these ideas, we recommend you to go through instructional exercises connected with these first, before you start with Vacillate.
Types of widgets:
- Stateless Widgets
- Stateful Widgets
Flutter, Dart, and equivalent technologies
| Flutter | React Native |
|---|---|
| Initial release in 2017 | Initial release in 2015 |
| Based on Dart | Based on React Js |
| Controls every pixel on the screen | Controls via the native mobile components |
| Cross-Platform ( Mobile, Web, Desktop ) | Cross-Platform ( Mobile, React Native Web ) |
| Developed by Google | Developed by Facebook |
| Current Version 3.3.9 | Current Version 0.70 |
| App performance is higher. Flutter 60 fps or 120 fps animation. Flutter itself paints and controls every single pixel on the screen | High. It requires the JavaScript bridge to interact with the native components. |
Flutter – Architecture Application
Flutter architecture application mainly consists of:
- Widgets
- Gestures
- Concept of State
- Layers
Widgets
Widgets are the primary component of any flutter application. It acts as a UI for the user to get in touch with the application. Any flutter application is itself a widget that is made up of a combination of widgets.
In a standard application, the root defines the structure of the application. This is followed by a Material App widget, which basically holds its internal components in place. This is where the properties of the UI and the application itself are set.
The Material App has a Scaffold widget that consists of the visible components (widgets) of the application. The Scaffold has two primary properties, namely the body and app bar. It holds all the child widgets and this is where all its properties are defined. The below diagram shows the hierarchy of a flutter application
Inside Scaffold, there is usually an appbar widget, which as the name suggests define appbar of the application. The scaffold also has a body where all the component widgets are placed. This is where these widget’s properties are set. All these widgets combined form the Homepage of the application itself. The Center widget has a property, Child, which refers to the actual content, and it is built using the Text widget.
Layers
The Flutter framework is assigned a category based on its complexity and establishes a hierarchy based on the decreasing level of these complexities. These categories are often called layers. These layers are built on top of one another. The top-most layer is a widget specific to the operating system of the device (ie, Android or iOS). The second layer consists of the native flutter elements, which comprise structural UI components, gesture detectors, state management components, etc.Flutter
Android Studio Setup for Flutter Development
This article will show how to set up Android Studio to run Flutter Applications. Android Studio is one of the popular IDE( integrated development environment ) developed by Google itself to develop cross-platform android applications. First, you have to install Android Studio of version 3.0 or later, as it offers an integrated IDE experience for a Flutter. You can refer this for details: Android Studio
Install the Flutter and Dart plugins:
After the successful installation of Android Studio, you have to install Flutter and Dart plugins. To do so follow the steps mentioned below.Flutter
- Start Android Studio.
- Open plugin preferences (Configure > Plugins as of v3.6.3.0 or later).
- Select the Flutter plugin and click Install.
- Click Yes when prompted to install the Dart plugin.
- Click Restart when prompted.
Open plugin preferences:
- For macOS: Preferences > Plugins on macOS,
- For Linux and Windows: File > Settings > Plugins
Now, Select Marketplace, select the Flutter plugin and click Install.
Creating the application:
After installing Dart and Flutter plugins create a flutter app to check if it is working properly or not, to do so follow the steps mentioned below:
Step 1: Open the IDE and select Start a new Flutter project.
Select New Flutter Project from the file menu
Step 2: Select the Flutter Application as the project type. Then click Next.
Step 3: Verify the Flutter SDK path specifies the SDK’s location (select Install SDK… if the text field is blank).
Step 4: Enter a project name (for example, myapp). Then click Next.
Enter the name of the project and also its description. Also, add the path of the Flutter SDK in the Flutter SDK path or click on install SDK.
Step 5: Click Finish.
Hit the Finish Button and wait till the project is created by the IDE.
Step 6: Wait for Android Studio to install the SDK and create the project.Flutter
Note: When creating a new Flutter app, some Flutter IDE plugins ask for a company domain name in reverse order, something like com.example. The company domain name and project name are used together as the package name for Android (the Bundle ID for iOS) when the app is released. If you think that the app might be released, it’s better to specify the package name now. The package name can’t be changed once the app is released, so make the name unique.
The above steps create a Flutter project directory called flutter_app that contains a simple demo app that uses Material Components.
Running the application:
Follow the below steps to run the flutter application that was structured above:
Step 1: Locate the main Android Studio toolbar:
Step 2: In the target selector, select an Android device for running the app. If none are listed as available, select Tools> Android > AVD Manager and create one there. For details, see Managing AVDs.
Step 3: Click the run icon in the toolbar, or invoke the menu item Run > Run.
After the app build completes, you’ll see the starter app on your device.
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