feature : renderer android jetpack #402
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Introduces a native Android renderer for the A2UI protocol using Kotlin and Jetpack Compose. Key changes: - Added enderers/android: - �2ui-core: Pure Kotlin module for protocol data models, state management, and JSON parsing. - �2ui-compose: Android Library module implementing A2UISurface and Material Design 3 component renderers. - Added samples/client/android: - Sample application demonstrating how to integrate the renderer using a Gradle composite build. - Implemented support for MVP components: Column, Row, Box, Text, Button, TextField, Image. - Updated .gitignore to include Android and Gradle build artifacts. - Added usage documentation and architecture overview.
- Added A2AClient.kt for native Kotlin-based agent communication using OkHttp. - Updated MainActivity.kt to connect directly to the contact lookup agent. - Implemented missing A2UI components in a2ui-compose: Checkbox, Slider, Card, Tabs, Modal, DateTimeInput, Video. - Updated a2ui-core data models to support the new components. - Added ANDROID_GUIDE.md documentation.
Major improvements to the Android A2UI client to resolve blank screen issues and enhance UI rendering.
Key Changes:
- **Fix JSON-RPC**: Corrected method name to message/send and fixed serialization logic to handle polymorphic ServerPart correctly.
- **Fix UI Rendering**:
- Implemented IconRenderer with reflection to support all Material Icons dynamically.
- Added DividerRenderer to support separator lines.
- Integrated Coil for image loading and added localhost->10.0.2.2 URL rewriting for emulator.
- **Stability**:
- Increased OKHttp timeout to 90s.
- Increased Gradle JVM heap size to 4GB to prevent OOM during build.
- **Documentation**:
- Updated Android client README with setup instructions.
- Cleaned up build logs.
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PR: feat(android): Implement Native A2UI Renderer & Interactive Contact Lookup Sample
Description
Implemented the initial version of the Android native renderer for the A2UI protocol and updated the sample client to verify its functionality against the
contact_lookupagent.Changes
Android Renderer (
renderers/android)ReflectiveIconRendererto dynamically load standard and extended Material Icons by name. AddedDividerRendererandImageRenderer(using Coil).kotlin-reflectandmaterial-icons-extendeddependencies to support the full range of A2UI icons without hardcoding.ComponentRegistryto map JSON types (e.g., "Icon", "Divider") to their Compose counterparts.Sample Application (
samples/client/android)MainActivityto include a standard text input and send button, enabling real-time user-agent interaction.ServerMessagetypes correctly.localhost->10.0.2.2) for emulator compatibility and increased Gradle heap size to 4GB to prevent OOM errors.README.mdwith clear setup and running instructions.Verification
contact_lookupagent.