4 Gesture Navigation
With Android P, Google is borrowing a key element from the iPhone X and introducing gesture-based navigation to its mobile operating system.
Instead of the signature three-button navigation controls, Android P has a single oblong line. Rather than tapping the square multitasking button, you’ll swipe up to see all of your open apps. Swipe up again to see your overall app tray.
The back button is now contextual, too — meaning it’ll only show up in apps. And you’ll swipe across the home line to switch between open apps (much like the iPhone X). Overall, it’s the most significant change to the way users navigate Android since it first launched.