Google、AIエージェントとAndroidアプリを接続するAppFunctionsを発表

In a move to transform Android into an "agent-first" OS, Google has introduced new early beta features to support a task-centric model in which apps provide functional building blocks users leverage through AI agents or assistants to fulfill their goals.

The foundation for this new model is provided by AppFunctions, a Jetpack API that allows developers to expose self-describing capabilities within their apps for seamless integration with AI agents. By running on-device, these interactions improve privacy and performance by minimizing network latency.

Mirroring how backend capabilities are declared via MCP cloud servers, AppFunctions provides an on-device solution for Android apps. Much like WebMCP, it executes these functions locally on the device rather than on a server.

For example, a user might ask Gemini Assistant to "Show me pictures of my cat from Samsung Gallery". The assistant would interpret the user's request, retrieve the relevant photos, and present them in its own interface. Those images can then persist in context, allowing the user to reference them in follow-up requests, such as editing, sharing, or taking further action.

As not all apps will support AppFunctions, especially in these early stages, Google has also introduced a UI automation platform in Android that provides a fallback when apps aren't integrated. This automation layer enables users to "place a complex pizza order for their family members with particular tastes, coordinate a multi-stop rideshare with co-workers, or reorder their last grocery purchase" all through the Gemini Assistant without additional developer effort.

This is the platform doing the heavy lifting, so developers can get agentic reach with zero code. It’s a low-effort way to extend their reach without a major engineering lift right now.

In their announcement, Google emphasized that privacy and user control are central to the design of AppFunctions. All interactions are designed for on-device execution, with full user visibility through live view and/or notifications, the ability to manually override the agent's behavior, and mandatory confirmation for sensitive actions such as purchases.

As noted, AppFunctions and the UI automation platform are still in early beta, currently available on the Galaxy S26 series, with a wider rollout of these features planned for Android 17.

About the Author

Sergio De Simone

Sergio De Simone is a software engineer. Sergio has been working as a software engineer for over twenty five years across a range of different projects and companies, including such different work environments as Siemens, HP, and small startups. For the last 10+ years, his focus has been on development for mobile platforms and related technologies. He is currently working for BigML, Inc., where he leads iOS and macOS development.

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