Android 8.1 feature spotlight: Pixel 2's Visual Core chip now enabled, and developers can use it
Android 8.1 feature spotlight: You can hide the 'running in the background' notification without a third-party app
Android 8.1 feature spotlight: Wallpaper-based themes include tinted notification and power menu shadows, just like the Pixel 2 [Update: Lock screen, too]
Android 8.1 feature spotlight: Recent apps now show in 'Apps & notifications' settings menu
Android 8.1 feature spotlight: Mobile data quick setting toggle asks if you really want to turn if off
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The Pixel 2 and 2 XL include a number of small tweaks that other 8.0 devices, even the OG Pixels, don't have. For example, the home screen's theme changes based on your wallpaper. We already knew that was coming to more phones in 8.1, and there's another theme feature from the Pixel 2 that's in 8.1 as well. Accent colors are pulled from your wallpaper for the notification and power menu shadows.
When you open the notifications or hit the power button to restart/power-off, the system draws a shadow overlay on the rest of the screen. If you do this while on the home screen, it's tinted with an accent color from your wallpaper. I've tested with a few different wallpapers, all of which produce varying shades. It works the same on the Pixel 2 and the Android 8.1 developer preview.
Importantly, this only happens when you're on the home screen (including the Google Feed). If you're in an app or even the settings, the shadow is the standard gray color. It's likely Google is using something similar to the Wallpaper API added in Android 8.1 on the Pixel 2's special 8.0 build. As we've come to realize, the Pixel 2 includes many features from 8.1.
It looks like the lock screen does this as well. However, the effect is even more subtle there.
- Roberto Mezquia Jr