Wear OS developer preview released; Android P features are coming to wearables
A developer preview for the newly renamed Wear OS (formerly Android Wear) has been released and it brings features of Android P to wearables. Because this is not made for consumers to play around with, it is available only through a manual download, or by flashing it on to a device. It includes updated system images on the official Android Emulator, and there is a downloadable system image for the Huawei Watch 2 Bluetooth, or Huawei Watch 2 Classic Bluetooth.
Among the new features is a Dark Theme. The darker background for notifications and the system launcher that has been in place since the beginning of the year, is now the default for the system theme; it improves the ability of the user to clearly view the screen on a wearable device, with just a glance. To save battery life, apps will no longer run in the background unless the device is on the charger. In addition, Bluetooth, Wi-Fi and internal radios will be disabled when sensors determine that the wearable hasn't been worn by the user for a longer period of time. And when Bluetooth is disconnected, the device will no longer automatically connect to Wi-Fi unless an app is seeking a high bandwidth network, or if the watch is on the charger.
source: AndroidDevelopersBlog
Developers are being told that some of these new features are being added gradually. Also, with Android P, Google is starting to restrict access to non-SDK methods. Google says that "Developers should make plans to migrate away from these."
source: AndroidDevelopersBlog
Things that are NOT allowed: