开发者指南：Gemini Enterprise 与 A2UI 集成

Google Cloud Blog

Google Cloud Blog2026年5月29日

开发者指南：Gemini Enterprise 与 A2UI 集成

9.2Score

TL;DR · AI 摘要

A2UI 是一种开放协议，使 AI 代理能安全、声明式地返回结构化 UI 组件（如日期选择器、地图），而非纯文本；通过与 Gemini Enterprise 集成，可在聊天界面原生渲染富交互界面，且支持跨框架（Lit/Flutter/Angular）与传输协议（A2A/SSE/WebSocket）。

核心要点

A2UI 使用 JSON 描述 UI 组件树与数据模型，避免 HTML/JS 注入风险，组件仅从预批准目录渲染。
在 A2A 协议中，A2UI 以 MIME 类型 application/json+a2ui 的 DataPart 形式传输，支持流式增量生成。
参考实现基于 Google Agent Development Kit（ADK）+ Gemini + A2UI，源码开源于 GitHub，含 2 分钟演示视频。

结构提纲

按章节快速跳转。

§问题背景：代理仅输出文本导致交互低效
传统代理返回纯文本或 Markdown，无法支持日期选择器、地图等富 UI，造成多轮对话冗余与用户体验下降。
·A2UI 协议核心机制
A2UI 是声明式 JSON 协议, 将 UI 表示为组件树与数据模型分离的结构，确保安全、可流式传输且框架无关。
·A2UI 在技术栈中的定位
A2UI 属于四层架构中的‘Cargo’层，独立于应用体验层（CopilotKit）、渲染层（Flutter/Lit）和传输层（A2A）。
›与 Gemini Enterprise 集成路径
通过 A2A 协议将 A2UI payload 嵌入 DataPart，使 GE 聊天界面原生渲染交互式组件，同时兼容自定义前端。
·参考实现与资源
使用 Google ADK 构建餐厅查找代理，完整源码托管于 GitHub，附带 2 分钟演示视频验证端到端流程。

思维导图

用一张图看清主题之间的关系。

查看大纲文本（无障碍 / 无 JS 友好）

A2UI：代理驱动的声明式 UI 协议
- 核心价值
  - 安全：非执行式 JSON，禁用任意代码注入
  - 高效：流式增量渲染，减少多轮对话
  - 通用：跨框架（Lit/Flutter/Angular）兼容
- 技术构成
  - 组件树：Card/Button/ChoicePicker/Image 等
  - 数据模型：绑定组件状态的值对象
  - 传输载体：A2A DataPart (MIME: application/json+a2ui)
- 集成场景
  - Gemini Enterprise 内置聊天界面原生渲染
  - 自定义前端（如 Lit + ADK 构建的餐厅查找器）
  - 企业级私有部署（通过 AG-UI 或 CopilotKit）

金句 / Highlights

值得收藏与分享的关键句。

A2UI payload 是数据而非可执行代码，客户端仅渲染预批准组件目录中的元素，从根本上防止 XSS 和凭证窃取。
— What A2UI is
⬇︎ 下载 PNG 𝕏 分享到 X
A2UI 消息是扁平化的 JSON 列表，支持 LLM 增量生成与客户端流式渲染，显著降低用户等待感知延迟。
— What A2UI is
⬇︎ 下载 PNG 𝕏 分享到 X
同一 A2UI payload 可在 Lit Web、Flutter 移动端与原生 Android/iOS 中一致渲染，体现其真正的框架无关性。
— Where A2UI sits in the stack
⬇︎ 下载 PNG 𝕏 分享到 X

#A2UI#Gemini Enterprise#代理开发#UI 协议#Google Cloud

打开原文

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