Android P feature spotlight: Google improves neural network API for machine learning and AI developers
Android P feature spotlight: Ambient Display shows current battery percentage and centers notifications
Android P feature spotlight: Night Light toggle now tells you when it'll turn on
Android P feature spotlight: Quick Settings is now vertically scrollable instead of paginated [Update: It's changed back in DP2]
Android P feature spotlight: The volume slider moves to the side of the screen, and there's superior control for Bluetooth devices
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Now that a large portion of our daily lives is spent staring at a screen, we've started becoming more and more concerned that this behavior may impact our circadian rhythms and the quantity and quality of our sleep. The hypothesis goes that humans have evolved to sync their sleep cycles to the cycle of the Sun, and that shining the pale blue glow of a phone screen into our eyes at night throws that sync off-balance and prevents our brain from recognizing when it's time to sleep. That's why so many devices now have a 'night mode,' where the color of the screen shifts to a more reddish tint at night so as to minimize the impact to sleep.
Android has had Night Light for a while now, letting users either toggle the setting in the Quick Settings pane, as well as setting a schedule for Night Light to turn on or off automatically based on a pre-specified time. However, if you didn't know if or when Night Light was scheduled to turn on, you had to look inside Settings to find out. That is changing in Android P, as now you'll be able to see at a glance when Night Light is set to turn on or off just by looking at the Quick Settings pane.
Left: Android Oreo Right: Android P
The change isn't revolutionary, and it's not like it was a major inconvenience to check the Settings app before, but there's no reason not to make something better if you can, and this is just another one of those tiny details that we like to find in new versions of Android.