At Google I/O 2026, Android was presented as evolving into an intelligence system, with a focus on integrating AI into apps. AppFunctions, a new platform API and Jetpack library, lets apps act as on-device servers, enabling them to share tools and data with system agents. Developers can generate AppFunctions easily and test them in a simulated environment using a new test agent. The early access program welcomes developers to deploy AppFunctions in production. Google also previewed Gemini Nano 4, offering features within ML Kit GenAI APIs. These include a transition to production, structured output capabilities, and prefix caching for improved performance. Firebase AI Logic Hybrid Inference lets developers choose between on-device and cloud model execution. The A2UI Jetpack Compose Renderer enables agents to display results as native UI components. The ADK for Android allows the creation of multi-agent workflows across different models. Developers are encouraged to explore code snippets, samples, and developer guides on the Android AI hub.