One Size Fits None: Adaptive, Context-Aware UI in Flutter with GenUI
Article Summary
Amorn Apichattanakul from KBTG just built a JARVIS-style financial HUD in Flutter that makes AI speak UI instead of walls of text. No more ChatGPT with a custom skin.
This article introduces A2UI, Google's new streaming protocol that lets AI agents return interactive UI components instead of text responses. Using Flutter's GenUI package, the author demonstrates how to build context-aware interfaces where AI dynamically generates native widgets based on user queries, creating a fluid 'Zero-UI' experience.
Key Takeaways
- AI returns JSON blueprints mapped to pre-vetted native Flutter widgets, not executable code
- Three-layer architecture: Component Catalog, Custom Message Processor, and Generative Conversation
- Declarative approach prevents code injection while maintaining brand consistency and performance
- Demo creates interactive financial dashboard with real-time graphs and sliders
A2UI enables AI to generate secure, native, interactive UI components on demand instead of forcing users to parse text responses.
About This Article
AI applications were giving smart responses through text-only interfaces. Users had to read through paragraphs and Markdown tables instead of seeing complex financial data visually.
Amorn Apichattanakul built a streaming protocol for A2UI using Flutter's GenUI package. This lets Gemini Flash create JSON blueprints that connect to pre-approved native Flutter widgets, so it doesn't have to generate code.
The JSON approach removed code injection risks and kept performance fast at the native level. The financial HUD can now render interactive dashboards, portfolio trackers, and simulation sliders instantly while staying on brand.