Developer preview release of Google's wearable device OS "Wear OS by Google" released

Android official developer blog,Renamed from Android WearI just did itWear OS by GoogleWe announced the release of the preview version for developers. "Wear OS by Google" will be the next version of AndroidAndroid PIt will be an OS that brings the functionality of the wearable terminal to the OS.

Android Developers Blog: Wear OS by Google developer preview
https://android-developers.googleblog.com/2018/03/wear-os-by-google-developer-preview.html


Google's Wear OS developer preview gets dark UI, lots of battery savings | Ars Technica
https://arstechnica.com/gadgets/2018/03/googles-wear-os-developer-preview-gets-dark-ui-lots-of-battery-savings/

The developer preview version of "Wear OS by Google" released is a system image that can be confirmed on the official Android emulator,HUAWEI WATCH 2OrHUAWEI WATCH 2 CLASSICYou can download the system image for.

The new functions etc. in "Developer's preview version of" Wear OS by Google "are as follows.

·Restrictions on methods and fields other than SDK
In order to improve application compatibility, Android P starts a process of restricting access to methods and fields other than SDK. Google warns that "Developers should make plans for migration from these," and if there is nothing equivalent to a use case, then "please let me knowThat thing.

· UI's dark theme
To enhance visual effects, Wear OS adds a dark theme to the UI for notifications and system launchers. In the preview version for developers, this dark theme is set by default, and it will improve the visibility of the special application. Also, Google wrote to developers that "When a developer changes to a dark theme, they need to check whether the accessibility of the application UI remains unchanged."

· Limited background activity
In order to reduce the power consumption of the terminal, you can not run the application in the background unless the wearable terminal is connected to the charger. Developer Wear OS to AndroidApplication standbyWe need to be aware that we are advancing functions further than some other form factors. However, it is selected by the userWatch faceandComplication Kei tionThere seem to be exceptions depending on the case. Please note that this "limited background activity" is a function that will gradually be released from the preview version for developers, so it may not be possible to check on the terminal at the beginning. If this function causes problems in the development process, it is possible to delete the background service and create the application.

· Turn off wireless function when wearable terminal is not installed
If it is detected that the terminal is away from the body for a long time, Bluetooth · Wi-Fi and wireless communication function will be turned off to reduce power consumption. Since this function is also planned to be released gradually, it seems that there are times when it may not be displayed on the terminal at the beginning. If you have problems with the development process, you can also use adb to disable the feature.

· Turn off Wi-Fi when Bluetooth is disconnected
In order to improve the battery mood, the function that it will not automatically connect to Wi - Fi when Bluetooth connection is released is also implemented. However, except when the application is requesting a high bandwidth network, or if the terminal is connected to a charger. As mentioned above, this function is gradually being developed, so it may not be available on the terminal at the beginning.