Problem Statement
Explain the typical Flutter project structure and the purpose of key directories.
Explanation
The lib directory contains all your Dart code with main.dart as the entry point where the app starts execution. You organize your code in lib with subdirectories like screens, widgets, models, services, and utils for clean architecture. Most of your development happens in this directory, and you're free to structure it however makes sense for your project.
The android and ios directories contain platform-specific code and configurations for building on each platform. You rarely need to modify these unless adding native functionality, configuring app permissions, or customizing launch screens. These folders contain Gradle files for Android and Xcode project files for iOS that define platform-specific build settings.
The test directory holds your unit and widget tests mirroring the structure of lib for easy test discovery. The build directory (ignored by version control) contains build outputs and generated files. Assets referenced in pubspec.yaml like images and fonts can be placed in an assets or images directory at the project root.
Other important files include pubspec.yaml for dependencies and configuration, .gitignore for version control exclusions, and README.md for project documentation. The .dart_tool and .idea/.vscode directories contain tool-specific configurations. Understanding this structure helps you navigate Flutter projects efficiently and follow Flutter conventions.
