Android 10 is built around three important themes. First, Android 10 is shaping the leading edge of mobile innovation with advanced machine-learning and support for emerging devices like foldable and 5G enabled phones. Next, Android 10 has a central focus on privacy and security, with almost 50 features that give users greater protection, transparency, and control. Finally, Android 10 expands users’ digital wellbeing controls so individuals and families can find a better balance with technology.

What’s new in Android 10?

Innovation and new experiences

With Android 10 you can take advantage of the latest hardware and software innovations to build amazing app experiences for users.

Foldables – Building on robust multi-window support, Android 10 extends multitasking across app windows and provides screen continuity to maintain your app state as the device folds or unfolds.

5G networks promise to deliver consistently faster speeds and lower latency, and Android 10 adds platform support for 5G and extends existing APIs to help you take advantage of these enhancements. You can use connectivity APIs to detect if the device has a high bandwidth connection and check whether the connection is metered. With these, your apps and games can tailor rich, immersive experiences to users over 5G.

Live Caption automatically captions media playing on users’ devices, from videos to podcasts and audio messages, across any app. The ML speech models run right on the phone, and no audio stream ever leaves the device. For developers, Live Caption is optional but expands the audience for your apps and games by making your content more accessible with a single tap. Live Caption is coming to Pixel devices this fall, and we’re working closely with our partners to launch it broadly on devices running Android 10.

Dark theme – Android 10 adds a system-wide dark theme that’s ideal for low light and helps save battery. You can build a custom dark theme for your app or let the system create one dynamically from your current theme.

Camera and media

Dynamic depth for photos – Apps can now request a Dynamic Depth image, which consists of a JPEG, XMP metadata related to depth-related elements, and a depth and confidence map embedded in the same file. These let you offer specialized blurs and bokeh options in your app. Dynamic Depth is an open format for the ecosystem and we’re working with our partners to bring it to devices running Android 10 and later.

Audio playback capture – Now any app that plays audio can let other apps capture its audio stream using a new audio playback capture API. In addition to enabling captioning and subtitles, the API lets you support popular use-cases like live-streaming games. We’ve built this new capability with privacy and copyright protection in mind, so the ability for an app to capture another app’s audio is constrained.

New audio and video codecs – Android 10 adds support for the open-source video codec AV1, which allows media providers to stream high-quality video content to Android devices using less bandwidth. In addition, Android 10 supports audio encoding using Opus – an open, royalty-free codec optimized for speech and music streaming, and HDR10+ for high dynamic range video on devices that support it.

Faster updates, fresher code

With Android 10 we’re continuing our focus on bringing the new platform to devices more rapidly, working closely with our device-makers and silicon partners like Qualcomm. Project Treble has played a key role, helping us bring 18 partner devices into this year’s Beta program along with 8 Pixel devices — more than double the number from last year. Even better, we expect those devices to get the official Android 10 update by the end of this year, and we’re working with several partners on other new flagship launches and updates. We’re seeing great momentum with Android 10 already, and more devices than any other previous Android release will be getting this new version in the months ahead.

Credit Goes To:
https://android-developers.googleblog.com/2019/09/welcoming-android-10.html