page.title=Accessing the Wearable Data Layer @jd:body
To call the data layer API, create an instance of
GoogleApiClient
,
the main entry point for any of the Google Play services APIs.
GoogleApiClient
provides a builder that makes it easy to create an instance of the client.
A minimal GoogleApiClient
looks like this:
Note: For now, this minimal client is enough to get started. However, see
Accessing Google Play services APIs
for more information about creating a GoogleApiClient
,
implementing its callbacks, and handling error cases.
GoogleApiClient mGoogleApiClient = new GoogleApiClient.Builder(this) .addConnectionCallbacks(new ConnectionCallbacks() { @Override public void onConnected(Bundle connectionHint) { Log.d(TAG, "onConnected: " + connectionHint); // Now you can use the data layer API } @Override public void onConnectionSuspended(int cause) { Log.d(TAG, "onConnectionSuspended: " + cause); } }) .addOnConnectionFailedListener(new OnConnectionFailedListener() { @Override public void onConnectionFailed(ConnectionResult result) { Log.d(TAG, "onConnectionFailed: " + result); } }) // Request access only to the Wearable API .addApi(Wearable.API) .build();
Important: To avoid client connection errors on devices that do not have the Android Wear app installed, use a separate {@code GoogleApiClient} instance to access only the {@code Wearable} API. For more information, see Access the Wearable API.
Before you use the data layer API, start a connection on your client by calling the
connect()
method, as described in
Accessing Google Play services APIs.
When the system invokes the onConnected()
callback for your client, you're ready
to use the data layer API.