GPS on Android Wear Devices

With the latest release of Android Wear, wearables with built-in GPS like the Sony Smartwatch 3
can now give you a GPS location update directly from the wearable,
without a paired phone nearby. You can now build an app like MyTracks
that lets a user track their run even when they leave their phone at
home. For wearable devices that do not have built-in GPS, a software
solution has always existed in Google Play Services that automatically
uses the GPS from your connected phone.

The Golfshot wearable app uses built-in GPS to calculate your distance to the next hole, even when you don’t have your phone with you.

Implementing GPS location updates

Implementing GPS location updates for Android Wear is simple. On the wearable, use the FusedLocationProviderApi from Google Play services
to request location updates. This is the same API that has been
available on mobile, so you can easily reuse your existing code and
samples.

FusedLocationProviderApi
automatically makes the most power-efficient decision about where to
get location updates. If the phone is connected to the wearable, it uses
the GPS on the phone and sends the updates to the wearable. If the
phone is not connected to the wearable and the wearable has a built-in
GPS, then it uses the wearable’s GPS.

One case you’ll need to handle is if the phone is not connected to
the wearable and the wearable does not have built-in GPS. You will need
to detect this
and provide a graceful recovery mechanism, such as a message telling
the user to bring their phone with them. However, for the most part,
deciding which GPS to use, and sending the position from the phone to
the wearable, is handled automatically. You do not need to deal with the
low-level implementation details yourself.

Data synchronization

When writing an app that runs on the wearable, you will eventually
want to synchronize the data it collects with the paired phone. When the
wearable is being taken out for a run, especially with the built-in
GPS, there may not be a phone present. So you will want to store your
location data using the Data Layer API, and when the phone reconnects with the wearable later, the data will be automatically synchronized.

For more details about how to use the location API, check out the extensive documentation and sample here.

Android Wear apps on Google Play

Also, as a heads up, starting on November 3 with the public release of Android 5.0,
you will be able to submit your apps for clearer designation as Android
Wear apps on Google Play. If your apps follow the criteria in the Wear App Quality checklist
and are accepted as Wear apps on Play, it will be easier for Android
Wear users to discover your apps. Stay tuned for more information about
how to submit your apps for Android Wear review through the Google Play
Developer Console.