Android 9.0 Pie (API level 28), formerly known as "Android P".
Android 9.0 Pie is the ninth major update and the 16th version of the Android operating system. It was first announced by Google on March 7, 2018. Android "P" was officially released on August 6, 2018 under the name "Pie". Android P harnesses the power of machine learning to make phone smarter, simpler, and tailored.
Summary of new features
- A smarter smartphone, with machine learning at the core
- Adaptive Battery
- Slices
- App Actions
- Text Classifier and Smart Linkify
- Neural Networks API 1.1
- New system navigation
- Display cutout support
- Notifications and smart reply
- Text Magnifier
- Multi-camera API and other camera updates
- Wi-Fi RTT for indoor positioning
- Performance for apps
You can find more info over here.
Android 9 features and APIs: official documentation
Behavior changes: official documentation
