Flutter

Google SDK for building cross platform apps.

• Dart Language
• Flutter is single threaded and runs on an event loop, similar to Node

Getting Started

• Setup dependencies

sudo pacman -S flutter
sudo yay -S flutter
# install android-studio

• Check for missing dependencies with flutter doctor -v
• Disable Google Analytics Reports with flutter config --no-analytics
• Add current user to flutter users with sudo gpasswd -a $USER flutterusers
  • or if that doesn’t work sudo chown -R $USER:$USER /opt/flutter
• Update to the latest version with flutter upgrade
• Download flutter dev dependencies flutter upgrade

Troubleshooting

Chrome executable not found

# set chrome executable for arch
export CHROME_EXECUTABLE=google-chrome-stable

Missing sdkmanager

Install the Android SDK Command-Line Tools using the Android Studio SDK-Manager. Then accept the licenses with:

flutter doctor --android-licenses

Learned Concepts

• Flutter Stateless Widgets
• Flutter Stateful Widgets
• Flutter Inherited Widgets
• Flutter Keys
• Flutter Isolates for proper Multithreading
• Flutter Async for non-blocking synchronous Work

Best Practises

Prefer creating new Widgets over using helper methods

Extracting common functionality into a new Widgets has following benefits:

• Isolating redrawing of UI changes to the current Widgets
• Prefer const constructors wherever possible to enable short circuiting
• Making the component more easily Testable
• Avoids stale build contexts Source: Youtube