How to build a responsive image component in Flutter

This tutorial walks developers through building a ResponsiveImage widget in Flutter that serves different image sizes based on device screen. The code samples show how to integrate Cloudinary's transformation API to request the right resolution at runtime. The piece is implementation-focused: no theory, just function signatures and widget composition. Useful for teams building cross-platform apps (phone, tablet, desktop) where one image size wastes bandwidth or looks wrong.