Code to calculate the full URI for a DataItem in the Wear SDK data store.

getUriForDataItem.snippet.java

// From this stackoverflow answer: http://stackoverflow.com/a/24607116/468310

private Uri getUriForDataItem() {
    // If you've put data on the local node
    String nodeId = getLocalNodeId();
    // Or if you've put data on the remote node
    // String nodeId = getRemoteNodeId();
    // Or If you already know the node id
    // String nodeId = "some_node_id";
    return new Uri.Builder().scheme(PutDataRequest.WEAR_URI_SCHEME).authority(nodeId).path("/path_to_data").build();
}

private String getLocalNodeId() {
    NodeApi.GetLocalNodeResult nodeResult = Wearable.NodeApi.getLocalNode(mGoogleApiClient).await();
    return nodeResult.getNode().getId();
}

private String getRemoteNodeId() {
    HashSet<String> results = new HashSet<String>();
    NodeApi.GetConnectedNodesResult nodesResult =
            Wearable.NodeApi.getConnectedNodes(mGoogleApiClient).await();
    List<Node> nodes = nodesResult.getNodes();
    if (nodes.size() > 0) {
        return nodes.get(0).getId();
    }
    return null;
}