Hello World App Development with Flutter

Learn how to write an app in Flutter with our step-by-step tutorials! Build your first Hello World app for Android and iOS and get started with mobile programming today.
Get started with Flutter programming by following our Hello World app tutorial! (Flutter Hello World).

What is Flutter and why should you use it?

Flutter is an open-source mobile application development framework created by Google. It allows developers to create high-quality apps for Android and iOS, with a single codebase. Flutter uses the Dart programming language, which is easy to learn, and new developers can quickly get up and running with it. The Flutter SDK comes with the tools needed to build, test, and deploy apps. One of the main advantages of Flutter is its hot-reload feature. This allows developers to see changes they make to the code in real-time, without the need to restart the app. This makes the development process quicker and more efficient. Another advantage of Flutter is its widget-based approach. Widgets are the building blocks of Flutter apps, and they can be easily combined and customized to create unique interfaces. This makes it easy to create apps with a consistent look and feel, as well as responsive layouts that adapt to different screen sizes. To get started with Flutter, developers can use the “flutter hello world” command to create a basic app that displays a “Hello, World!” message. This is a simple example of how easy it is to create apps with Flutter. Overall, Flutter is a great choice for developers who value speed, efficiency, and ease of use. It’s well-suited for creating apps with complex user interfaces, and its hot-reload feature makes it easy to iterate quickly during the development process. With the growing popularity of Flutter in the development community, it’s definitely worth checking out for any mobile app project. 

Hello World App in Flutter

Learn how to write an app in Flutter with our step-by-step tutorials! Build your first Hello World app for Android and iOS and get started with mobile programming today. Get started with Flutter programming by following our Hello World app tutorial! Install Flutter and Dart, and learn how to code for both Android and iOS platforms. Looking for a beginner-friendly app development tutorial? Check out our Hello World app guide for Flutter! Master mobile programming for both Android and iOS. Step into the world of Flutter programming and build your own Hello World app with our comprehensive tutorial. Install Flutter to code for both Android and iOS with ease. Dive into the world of mobile programming with our Flutter Hello World app tutorial. Learn to code for both Android and iOS, and master the basics of Flutter programming in no time! 

Why Flutter Hello World Example?

The flutter hello world example is often the first app developers create when learning how to use Flutter. The hello world example is a basic app that simply displays the words “hello world” on the screen. While simple, this example application serves as a great starting point for beginners and helps them learn the basics of the Flutter framework. It teaches the basics of building a user interface, handling user input, and running the application on an emulator or real device. Additionally, the flutter hello world example provides a good introduction to the Dart programming language, which is used to write Flutter apps. As developers become more proficient with Flutter, they can move on to more complex app development projects, but the flutter hello world example remains an important starting point for building strong foundations in the framework. 

Prerequisites

List of the prerequisites required to install Flutter, including:

  • Operating system requirements
  • Disk space requirements
  • System dependencies
  • Recommended hardware configurations

Operating system requirements

Flutter can be installed on different operating systems, but each operating system has its own set of requirements that must be met before installing Flutter. Here are the operating system requirements for installing Flutter:

  • Windows: Flutter can be installed on Windows 7 or later, but Windows 10 is recommended for the best performance. Windows users must have a 64-bit version of the operating system, as well as an Intel x86 processor or an ARM64 processor. In addition, Windows users must have PowerShell 5.0 or newer installed.
  • Mac: Flutter can be installed on Mac OS X 10.13 or later. Mac users must have an Intel-based Mac with a 64-bit processor, at least 2 GB of RAM, and at least 700 MB of free disk space.
  • Linux: Flutter can be installed on Linux distributions, such as Ubuntu, Debian, and Fedora. Linux users must have a 64-bit version of the operating system, as well as the following libraries installed: libgtk-3-dev, libglfw3-dev, and libgles2-mesa-dev. In addition, Linux users must have at least 2 GB of RAM and at least 700 MB of free disk space.
Disk space requirements

Flutter requires a minimum amount of disk space to be installed on different operating systems. Here are the disk space requirements for installing Flutter:

  • Windows: For Windows, Flutter requires at least 1.32 GB of free disk space to be installed.
  • Mac: For Mac, Flutter requires at least 2.8 GB of free disk space to be installed.
  • Linux: For Linux, Flutter requires at least 1.62 GB of free disk space to be installed.

System dependencies

Before installing Flutter, there are a number of system dependencies that must be installed on the user’s machine. These dependencies vary depending on the operating system being used. Here are the system dependencies required for installing Flutter:

  • Windows: Windows users must have PowerShell 5.0 or newer installed. In addition, they must have the following tools installed: Git for Windows, Git Credential Manager for Windows, and Visual Studio Code. Visual Studio Code is not required, but it is the recommended IDE for Flutter development on Windows.
  • Mac: Mac users must have the Xcode development environment installed, which includes the Xcode IDE, as well as the Xcode command-line tools. In addition, they must have Git installed.
  • Linux: Linux users must have a number of libraries and tools installed, including: build-essential, curl, file, git, libglu1-mesa-dev, libgtk-3-dev, liblzma-dev, libssl-dev, pkg-config, and unzip.

Recommended hardware configurations

Flutter can be run on a range of hardware configurations, but it is recommended that users have a relatively powerful machine to ensure optimal performance. Here are the recommended hardware configurations for running Flutter:

  • Processor: Flutter can be run on both Intel and ARM processors. However, a multi-core processor is recommended for the best performance.
  • RAM: Flutter requires at least 2 GB of RAM to run, but it is recommended to have at least 8 GB of RAM for comfortable development. This is especially important when working with large projects or multiple instances of IDEs or emulators.
  • Disk space: As mentioned earlier, Flutter requires a minimum amount of disk space for installation. However, additional disk space will be required for project files, as well as any additional tools and dependencies required for mobile app development.
  • GPU: A dedicated graphics processing unit (GPU) is not required for Flutter development, but it can improve the performance of emulators and simulations. Users who plan to work with high-end graphics or 3D rendering may benefit from having a dedicated GPU.
  • Screen resolution: Flutter can be used on screens of different resolutions, but it is recommended to have a minimum resolution of 1280×800 for the best experience.

It is important to note that these are recommended configurations, and users may be able to run Flutter on machines with lower specifications. However, users may experience slower performance and longer build times, especially when working with large or complex projects.

How to install Flutter?

If you are interested in app development with Flutter, you may be wondering how to install it. Fortunately, the process is straightforward and relatively quick to complete. Here is a step-by-step guide.

Step 1: Download Flutter SDK

  1. Go to the official Flutter website at https://flutter.dev/.
  2. Click on the “Get started” button at the top of the page.
  3. Select your operating system from the dropdown list.
  4. Click on the “Download” button to download the Flutter SDK.

Step 2: Extract the Flutter SDK

  1. Once the download is complete, extract the contents of the zip file to a folder on your computer.
  2. For example, if you’re using Windows, you can extract the zip file to “C:\src\flutter”. If you’re using macOS or Linux, you can extract it to “~/src/flutter”.

Step 3: Set up your environment

  1. Add the Flutter SDK path to your system’s PATH environment variable.
    • On Windows, follow these steps:
      1. Open the Start menu and search for “Environment Variables”.
      2. Click on “Edit the system environment variables”.
      3. Click on the “Environment Variables” button.
      4. Under “System Variables”, scroll down until you find “Path” and click on “Edit”.
      5. Click on “New” and add the path to the “flutter\bin” folder that you extracted in Step 2.
      6. Click “OK” on all windows to save the changes.
    • On macOS or Linux, add the following line to your shell profile file (e.g., “/.bashrc” or “/.zshrc”): bashCopy codeexport PATH="$PATH:[PATH_TO_FLUTTER_SDK]/bin"
  2. Run the following command to verify that Flutter is correctly installed: Copy codeflutter doctor This command checks your environment and displays a report of the status of your Flutter installation.

Step 4: Install dependencies

  1. Install the Android SDK by following the instructions on the Android developer website: https://developer.android.com/studio#downloads
  2. Install Xcode (macOS only) from the App Store or from the Apple Developer website: https://developer.apple.com/xcode/
  3. Install any other dependencies required by your specific project (e.g., if you’re developing for iOS, you may need to install CocoaPods).
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