The major components of Flutter include:
Flutter’s engine, written primarily in C++, provides low-level rendering support using Google’s Skia graphics library. Additionally, it interfaces with platform-specific SDKs such as those provided by Android and iOS.
UI design in Flutter involves assembling and/or creating various widgets. A widget in Flutter represents an immutable description of part of the user interface; all graphics, including text, shapes, and animations are created using widgets. More complex widgets can be created by combining many simpler ones.
The Flutter framework contains two sets of widgets that conform to specific design languages. Material Design widgets implement Google’s design language of the same name, and Cupertino widgets imitate Apple’s iOS design.
Web View Frameworks
Reactive View Frameworks
For developers, Flutter means faster & more dynamic mobile app development. We can make changes in the code and see them straight away in the app! This is the so-called Hot reload, which usually only takes (milli)seconds and helps teams add features, fix bugs, and experiment faster. Hot reload is also very comfortable in developer-designer cooperation when we want to improve or experiment with an app’s look and check the effects on the spot. In other words, with Flutter, your designer or tester can work together with a developer on the UI, making changes – for example, “Put it 2 pixels right” or “Make the animation faster” – and see them immediately. Most types of code changes can be hot reloaded. But there is a list of changes that require a full restart: Hot reload Limitations.
Developers write just one codebase for your 2 apps – covering both Android and iOS platforms. Flutter doesn’t depend on the platform, because it has its widgets and designs. This means that you have the same app on two platforms. Yet what’s important is that, if you want to differentiate your apps – it’s possible.
If you have the same app for 2 platforms, it means less testing! The Quality Assurance process can be faster. Because of one codebase, the developers write automatic tests only once. What’s more, Quality Assurance specialists have less work to do, because they have only one app to check. Of course, if your apps have some differences, they need to be tested on both platforms.
Flutter is designed to make it easy to create your widgets or customize the existing widgets. Here. you can browse a catalog of Flutter’s widgets and view, for example, Material Design widgets and Cupertino widgets.
Your new app will look the same, even on old versions of Android and iOS systems. There are no additional costs for supporting older devices. Flutter runs on Android Jelly Bean or newer, as well as iOS 8 or newer.
Do you need an MVP (Minimum Viable Product) for your app to show to your investors? Flutter will be perfect, especially if you have little time.
In April 2018, Flutter beta 2 has been announced. The Flutter team hasn’t released the stable version yet. “Our APIs are stabilizing, and we continue to improve parts of the system based on user feedback. Some key features are not yet ready for broad deployment” – we read on the official Flutter website. So this means that we can expect changes and improvements that can demand future changes in our code if we ship an app before the stable version of this is ready.
Google support for this is impressive and there are many helpful libraries with functionalities ready to be implemented. But it is still new and not every functionality which you need can be found in these libraries. This means that your developers would need to build them by themselves, which can be very time-consuming. Here you can find Flutter Packages – a list of features ready to be added to your app. What’s important is that these packages are checked, analyzed, and rated for factors like health, popularity, and maintenance. However, we can expect that the support for Flutter will improve at a rapid pace. What’s more, the Flutter team is actively involved in supporting Flutter users by frequently solving and answering requested issues.
Since Flutter is still in beta, it is not widely supported by CI platforms like Travis or Jenkins. So, to achieve automatic building, testing, and deployment, your development team needs to use and maintain custom scripts like this one. However, Bitrise.io is the exception where you can find a ready-to-use build step.
There are a few cases when you should not consider if it is the proper solution:
In our opinion, Flutter has many more advantages for business and development teams than risks. It’s a great chance to build beautiful, high-performance, and outstanding mobile apps which fit your custom needs and requirements. It’s worth considering Flutter, especially if you want an app for iOS and Android.