一加海外论坛今天发布了一加9、一加9Pro Android 12开发者预览第二版 | Android 12 Developer Preview 2，注意这个是开发者预览版，非常不适合普通用户使用。但相比第一版加入了几乎完整的氧OS内容。所以第一版不敢尝鲜的，这一版到可以试一试了。

一加9、一加9Pro Android 12开发者预览第二版更新说明

System

Optimized the auto-brightness algorithm to adapt screen brightness to more scenes for a comfortable screen reading experience
Optimized the mistouch prevention algorithm for curved screens to reduce accidental touches

New design

Added widgets that show key information of apps and provide instant access to functions
Optimized the page layout and the presentation of text and color to make key information stand out

Convenience & efficiency

Added swiftly switch floated windows, make operation more convenient

Games

Optimized the frame rate performance under heavy-used scenes

Camera

Added the feature that supported customize the display order of camera mode
Optimized the zoom experience, make it zoom more smoothly

Performance

Added the form of chart to display battery usage
Newly supported pre-loading the apps that frequently used, to switch them on quickly
Improved the response speed of turning on or off Wi-Fi, Bluetooth, Airplane mode, and NFC

一加9、一加9Pro Android 12开发者预览第二版已知bug

The Camera does not support Xpan, and contains some stability issues
This version does not support scrolling screenshot
The icon of Bluetooth connection displays abnormally
The icon of charging displays abnormally
The Cloud Service is unavailable (India)
The Camera app does not contain Hasselblad elements
This version does not adapt some third-party apps
The included Google Phone app does not feature call record functionality. This can be solved by updating the app in Play Store.
Three-finger swipe down gesture or three-finger long-press gesture after using the screen recorder. This can be overcome by pressing Power button and Volume Down button simultaneously instead to screenshot.

一加9、一加9Pro Android 12开发者预览第二版警告

You should understand there is a risk of BRICKING your phone, read the instructions carefully and be 100% sure of what you are doing. Please always backup your important data before flashing.