android/appfunctions

This is an official Android sample repository from Google that shows developers how to use a feature called AppFunctions. AppFunctions is an Android API that lets a regular app advertise some of its actions to the operating system and to AI agents that run on the phone. In practice, a chat app could tell the system that it knows how to send a message or start a call, and the system or a voice agent could then trigger that action without the user having to open the app and tap through screens. The repository ships one sample app called ChatApp. It is a working chat application written in Kotlin using Jetpack Compose for the user interface and Hilt for dependency injection. The sample exposes three concrete actions through AppFunctions: sending a message, searching contacts, and starting a call. The point is not to provide a finished chat product but to demonstrate the wiring needed to make those actions available to the wider Android intelligence layer. To try the sample, a developer needs Android Studio, the Android SDK at level 36 or higher, and a device or emulator running Android 16 or newer. After cloning the repository and opening the ChatApp folder in Android Studio, the standard Gradle sync, build, and run flow deploys it to the device. The code is released under the Apache 2.0 license. Contributions are accepted through pull requests after signing the Google Contributor License Agreement, with the Spotless tool used to enforce formatting and new functionality expected to come with unit or instrumentation tests. The README also points readers to the official AppFunctions developer guide on developer.android.com for a fuller overview of the API, and to a companion repository of AppFunctions Skills designed to speed up AI-driven development on top of the same primitives. Because the sample sits in the official android organization on GitHub, it is intended as a reference implementation that other app authors can copy patterns from rather than a library to depend on directly.