What is the Uri for Wearable.DataApi.getDataItem() after using PutDataMapRequest?

Question

I\'m testing the Wearable Data Layer Api as described in the Android tutorial.

There is a low level API based around DataItem, which can have only a byte array

Answer 1

The uri's authority (which is described as <some guid here> in your post) is Node Id which is available via Node API. In summary, you can construct the Uri as following.

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;
}