On March 21, 2017, Google released the first developer preview of Android "O", available for the Nexus 5X, Nexus 6P, Nexus Player, Pixel C, and Pixel smartphone devices. Google will release a total of four developer previews, with the second preview coming in May, the third in June, and the fourth in July, with a final, official release scheduled for the third quarter of 2017. On its Program Overview pages, Google states that the first developer preview is considered alpha quality, with the upcoming second preview considered beta quality.
Notifications can be snoozed, and batched into topic-based groups known as "channels". Android "O" contains integrated support for picture-in-picture modes. Adding a custom ringtone, alarm or notification sound is simplified. The "Settings" app features an entirely new design, with a white theme and deeper categorization of different settings. On the home screen, number badges can appear on app icons, indicating notifications.
Android "O" will add support for Neighborhood Aware Networking (NAN) for Wi-Fi based on Wi-Fi Aware, wide color gamuts in apps, an API for autofillers, multiprocess and Google Safe Browsing support for WebViews, an API to allow system-level integration for VoIP apps, and launching activities on remote displays.Android Runtime (ART) features performance improvements. Android "O" contains additional limits on apps' background activities in order to improve battery life. Apps can specify "adaptive icons" for differently-shaped containers specified by themes (such as circles, squares, and squircles).