Flutter Layer Diagram Tech Stack

An overview of the components that make up a typical Flutter app created with flutter create is shown in the following diagram. It indicates the repositories where the various components are stored, shows the position of the Flutter Engine inside this stack, and emphasizes API boundaries.

For example, I'll use the current project I've been working on for the past year. This is my biggest Flutter app yet nearing 260k lines of Dart custom KotlinSwift code. Architecture BLoC flutter_bloc hydrated_bloc, get_it service locator injectable. Networking Dart's built-in HttpClient has everything I need

The second topmost layer contains all the Flutter native widgets. The next layer is the rendering layer, which renders everything in the Flutter app. Then, the layers go down to Gestures, foundation library, engine, and finally, core platform-specific code. The following diagram specifies the layers in Flutter app development.

It is an overview of the Flutter application layer architecture, enabling you to understand the intricacies of this cross-platform framework. The diagram below serves as a visual guide to the widget hierarchy in a Flutter app providing tools for visual debugging, including the Flutter inspector. The Flutter inspector uses a technology

Each layer depends on the one below it, but none of them have special control over another. This design means you can change parts of Flutter without affecting the whole system. Architecture layers diagram from flutter's official documentation. The Bottom Layer Embedder The first layer is the Embedder. This is where Flutter connects with the

Business logic layer This layer manages the state usually using flutter_bloc. Presentation layer Renders UI components based on state. The domain layer converts raw data into domain-specific models that are consumed by the business logic layer. The business logic layer keeps an immutable state of the domain models that the repository provides.

Here's a detailed explanation of each layer and its components Flutter's architecture can be summarized into three main layers Framework Layer written in Dart Engine Layer written in C

The topmost layer is a widget specific to the operating system of the device ie, Android or iOS. The second layer consists of the native flutter widgets, which comprise structural UI components, gesture detectors, state management components, etc. This third layer is where all the Ui and state rendering occurs.

Separation-of-concerns is the most important principle to follow when designing your Flutter app. Your Flutter application should split into two broad layers, the UI layer and the Data layer. Each layer is further split into different components, each of which has distinct responsibilities, a well-defined interface, boundaries and dependencies.

The following diagram gives an overview of the pieces that make up a regular Flutter app generated by flutter create. It shows where the Flutter Engine sits in this stack, highlights API boundaries, and identifies the repositories where the individual pieces live. For example, in the widgets layer, Flutter uses the same core concept a