What Are The Best Practices For Flutter App Development? - Magzinenow

What Are The Best Practices for Flutter App Development?


Creating a future-ready and feature-rich solution is surely the chief responsibility of an application developer so that feature-rich gets the maximum percentage of users’ engagement. Therefore, this has resulted in developers developing mobile applications for the 2 most well-known Operating Systems.

To build such solutions the experts face a dilemma- if there is an effective and exact pathway through which developers (of a reliable mobile app development company) can easily enter both the Operating Systems & that too at the same time. For this most teams of app development embrace cross-platform. But as per the on demand app development company like ionicfirebase, selecting the finest tech stack is crucial while performing cross-platform application development for this task.

Flutter is getting very much attention from the market of mobile application developers. About 42% of the market gives preference to Flutter to create feature-rich, fully-functional, and robust cross-platform apps at a reasonable rate.

Therefore, if you have hired a team of Flutter app developers from a reliable flutter app development company or are willing to consider utilizing Flutter especially to build an app, then first make sure you know all the important practices so that you get a promising and memorable journey.

Scroll down to create an application that performs rich in quality and also saves precious time for you when a coder writes codes for OS – iOS and Android.

Have a glimpse at the list of the best practices for application development in Flutter

In this write-up, we’re going to share the finest practices for the application development team of a trustworthy mobile app development agency to make improvements in the quality of code, productivity, readability as well as maintainability. Let us get snapping:

Build function 

This method is created in a way that it has to be pure or say with not any kind of unwanted stuff. The reason behind this is that there are exact non-internal factors that can easily trigger one of the latest widgets builds, a few instances are Route pop/push. Resizing the screen (which is usually because of the keyboard’s appearance or orientation change. The child is recreated by their parent widget. A widget that is Inherited (where the widget completely depends on (Class. of(context) pattern) change.

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Comprehending the constraint’s concept in Flutter

Flutter layout has a thumb rule in which every app development team (from a top-rated flutter app development company) of Flutter requires to know: 

First, constraints will go down.

Second, sizes go up.

and last but not least, the parent sets the position.

Let us comprehend more about them:

From a parent widget, a particular widget has its own constraints. Which has a set of 4 doubles: a min/max height, and a min/max width.

Next up, a particular widget simply goes through its own list of children. Here the commands will be simply provided by the particular widget to its children about what their constraints are, and after that ask every single child about the size they want to have.

After that, the widget will set the positions of the children (here, the horizontal position will be set on the x-axis, & the vertical position will be set on the y-axis) one after the other. And after that, the widget will simply notify its parent about its own size that too within the authentic or original constraints.

According to the development team of a Flutter mobile app development company, Every single widget in Flutter offers itself completely based on its box constraints or its parent. However, this has a few restrictions attached.

For instance, if there is a child widget of your parent widget and you would surely be willing to make a decision on its size. The size of the widget can’t auto-adjust. As its size must be within the widgets’ constraints which are entirely set by its parent.

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Use of operators 

This Cascades(..) operator is surely a must to use, especially if you are willing to perform a series of operations that too on the particular same object.

spread collections can be simply utilized by you especially if the existing items are totally stored in another spread collection already. The syntax of this spread collection leads to easier as well as simpler code.

  • Use of operators such as Null aware (?.) and Null safe (??) 

Always try to go for ?? (null safe) & ?. (null aware) rather than null checks in a particular conditional expression.

  • Use the “is” operator instead of the “as” operator 

Usually, in case the cast is completely impossible, this cast operator simply throws an exception. One can simply use `is`, to prevent a particular exception from being simply thrown.

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Use of streams 

Streams are surely pretty compelling, as they make effective utilization of this resource.

Utilizing the streams along with inferior implementation can give rise to more utilization of memory & CPU. In any case, if you forget to close the particular stream, you’ll give rise to memory leaks.

Here in the place of utilization Streams, you can utilize any particular thing that consumes quite less memory like ChangeNotifier for reactive User Interface. For more ultra-modern functionalities, the team of Flutter mobile app development company can utilize the Bloc library that puts extra effort into utilizing the resources in a proficient manner and give a simple interface to generate the reactive User Interface.

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These streams won’t be effectively cleaned as long as the streams are not utilized anymore. But the point is if you merely remove the variable, that is not enough to make certain it is not utilized. But yes, streams still could run in the background.

You have to simply call Sink.close() so that it simply stops the associated StreamController, just to make certain resources can just later be released by the GC.

To do that, you’ve to utilize StatefulWidget.dispose of method:

Write tests, especially for critical functionality

Manual testing will be there always. Having a test that is an automated set can assist you to save a big amount of time as well as effort. As everyone knows Flutter usually targets multiple platforms, and testing every single functionality after every small change would surely be time-consuming and of course call for lots of repeated effort.

That’s why having 100 percent code coverage, especially for testing, will surely be the best option ever, however, on the basis of availability of time & budget, it might not always be possible. Nonetheless, it is surely important to test to cover the crucial functionality of the application.

The utilisation of raw string

The raw strings can be simply utilized to not come across escaping merely backslashes & dollars.

Though, there are many other best practices for flutter app development that can help you to get the best app. But to get the optimum result hire flutter developer from a reputed Flutter app development company so that you get what you are seeking for.


The Custom Boxes
The Custom Boxes