用于检测Wear手表与Android手机之间距离的API？

Question

In my application, we want to warn the user when he is at distance from Phone or watch.

We are scanning nearest nodes using APIs of wear OS.

Is there any way I can detect the distance between two such nodes?

Getting geolocation of both & calculate distance using formula is one possible way.

But aren't the APIs on wear OS has something which can detect distance using Bluetooth range or signal strength?

Answer 1

The best that's directly supported by the platform is the Node API's isNearby method , but that essentially just returns true iff the phone-watch connection is over Bluetooth rather than cellular or wifi. It doesn't give you anything resembling a real distance number.

Beyond that, you'd have to roll your own solution using GPS on both devices, as you mention. But that has a lot of downsides: complexity, reliability, and battery use are ones that immediately occur to me. Someday, you'll be able to get this kind of accuracy from the fused location provider using wifi , but probably not for some years.