Best Practices for Flutter App Development in 2024

Best Practices for Flutter App Development in 2024

Flutter is one of Google's newest and most promising open-source UI software development kits. Flutter has always aimed to expand into a framework for comprehensive software solutions, even though it first started as a cross-platform app development framework. However, with the advent of Flutter 3, it has taken a step closer to reaching its potential because developers can now employ it to create iOS, Android, Windows, Linux, and Mac computers and web apps.


Flutter framework is simple to comprehend but mastering it can be challenging. Even though the platform offers thorough documentation, not all developers can fully utilize it. But let's say you are familiar with the Flutter app best practices. In such a scenario, you can use this tool to create unique enterprise apps and widespread consumer mobile apps. To help you improve and optimize your Flutter app, we have compiled this comprehensive list of recommended Flutter best practices to follow in 2024.


Flutter Best Practices to Follow in 2024


Flutter Code Structure Best Practices


The efficiency of an app platform is due to the platform's underlying code structure. Even when using a great app platform, a poor code structure can result in a poorly functioning app. As a result, it becomes essential to improve coding. Therefore, Flutter app development best practices must follow various code structure. Let's look at these code structure best practices:


  1. Adhere to proper naming conventions -This is honest advice for developers, although it is constantly disregarded. While it may seem time-consuming at first, it will save a lot of coding and code review time.

  1. Use widgets properly by dividing them into sub-widgets - Improve performance while working with a lengthy list of widgets using ListView

  1. Use dark code metrics - Aid with improvisation and keep track of the overall quality of the code.

  1. Write clean and reuse code - Make sure your Flutter code is tidy and readable, and whenever you can, use widgets and reusable code.


Flutter Layout Best Practices


  1. Be aware of the importance of flutter constraints - Constraints are the minimum and maximum height and width values. Parents give them to Widgets. Making a decent layout requires a solid understanding of the restrictions.

  1. Use the Fittedbox widget to make the Flutter layout responsive - The Fittedbox widget restricts how big a child widget can get based on the available space, making it crucial when putting in place a responsive design.

  1. Reduce the number of layout passes brought on by intrinsic operations - Flutter should only go through one layout pass while arranging its widgets. A second pass, though, is frequently required. A Flutter app developer should keep the number of passes to a minimum because too many passes will affect the flutter app's overall performance and design.

Flutter Navigation Best Practices

Following are some recommendations for Flutter navigation best practices when creating your app:

  • Be familiar with the fundamental Flutter navigation techniques- Flutter has a built-in routing and navigation mechanism to ensure minimal navigation-related issues. Therefore, developers must ensure they are familiar with the fundamental navigation techniques.
  • Flutter navigation packages -In addition to the navigation and routing methods offered by Flutter, there are also Flutter routing packages to make it easier to set up navigation and route for your app.

Flutter Project Structure Best Practices

Developing an app is simple for developers because of the project structure that remains, even if a brand-new group of programmers replaces the app's development team. Project structure best practices are listed below:

  • Organize depending on the feature list - When organizing a project, consider the feature list. This folder layout will aid in organizing and scaling the files in the features folder. 
  • Structure by Domain/Type – In Flutter, app files are organized based on their type, which is a standard structural pattern.

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Flutter Performance Best Practices 

  • Loading list items as needed:Most Flutter app developers combine Column and SingleChildScrollView when working with list items. To prevent the code from becoming muddled, use ListView when the list is long.
  • Avoid rebuilding widgets -The setStatemethod of rebuilding widgets is a performance bottleneck in Flutter since it causes the scaffold, container, and background widget to be updated when a user interacts with a widget. Instead, only update what needs building. You can use the BloC pattern or other external packages.
  • Use constant widgets -This Flutter feature allows you to declare a widget as continuous, which activates it at compile time. This aids developers in avoiding wasteful and pointless rebuilds.
  • Employ interpolation techniques -String interpolation was used, which improved code readability and decreased error risk.

Flutter Security Best Practices

Developers must ensure an app is secure to safeguard user data. Some of the ideal methods to use are:

  • Code obfuscation- This is the process of altering the software's binary to make it difficult for humans to understand and thereby safeguard it from reverse engineering.
  • Local Authentication- If an app offers payment functionality, it is crucial to use this additional layer of authentication after the screen lock. It is achievable via fingerprint APIs, touch IDs, lock codes, and other biometric authentication methods.
  • Protection background snapshot- The multitasking screen will show an app's most recent action when running in the background. For example, you wouldn't want information from your banking app to appear on your background screen. Again, utilize the secure application if possible.

Flutter Testing Best Practices

Testing an app for security, functionality, and user experience is crucial. The following are some top recommendations to follow when testing your app: 

  • Recognize the offered Types of Flutter testing types- When creating an app, a developer must perform numerous different kinds of testing. Every test has a target that it hopes to find. A developer must be aware of these checks. The trial aims to test end-to-end interactions with mocked dependencies and when to use the test to identify breaks in business logic. Testing integration is an example of this type of test. 
  • Avoid poor test writing practices – To eliminate poor-performing test writing, a Flutter developer must be aware of and avoid the errors most developers make. Avoid making the following errors: 
  1. An unclear testing goal
  2. There are no exceptions or assertions
  3. Tests with hidden dependencies

  • Utilize the "Given-When-Then" Method: This is one way to write Flutter tests. This aids in the logical and understandable division of conditions.


Note: Everything About Flutter App Development


Are you ready to adapt to Flutter?

To improve the performance of their Flutter apps, developers must follow best practices. The best practices shared in this blog will significantly enhance how users interact with your software when you implement them. However, using these best practices may vary depending on the project requirements. Nevertheless, they should aid in making your Flutter code more readable.


Finally, consider Flutter app development to create high-quality apps by adhering to Flutter best practices. At Clarion, we are focused to help growing organizations build modern enterprise applications using Flutter. Get in touch with us to discuss your app requirement and hire Flutter developers to give your application a competitive edge.


Dilip Kachot, a seasoned Technical Architect with over 7 years of experience in the Mobility domain, excels in driving successful delivery of cutting-edge solutions. His expertise lies in architecting and implementing innovative mobility solutions that align with the evolving technological landscape.

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