Accessing the Wearable Data Layer

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 mGoogleAppiClient = 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);
                }
            })
        .addApi(Wearable.API)
        .build();
      

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.