ROS Android Connection Failure

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I have two apps at play. One app (A) forms a connection successfully, but the other app (B) fails unintendedly. Any incite into my problem would be greatly appreciated:

App A launches a RosActivity to form a connection between tablet and PC. App B launches a NodeMainExecutorService to form a connection between tablet and PC.

Both apps use the exact same host name, and master URI (same tablet, same PC). Within the Java debugger, I have verified that host and URI values are the same between apps for my NodeConfiguration.

I have also verified that the NodeMainExecutorService is running. I'm reaching the point where remote procedure calls are failing, and I cannot tunnel any deeper with the Java debugger.

I've read a considerable amount of the RosAndroid source. My understanding is RosActivity is nothing but a convenience wrapper to start the NodeMainExecutorService so there's nothing I should need to do to connect with ROS other than starting the NodeMainExecutorService and supplying the correct host and URI.

My code in app B is as follows:

public class Ros {
private static final String TAG = Ros.class.getSimpleName();
private static final NodeMainExecutorServiceConnection s_connection = new NodeMainExecutorServiceConnection();
private static NodeMainExecutorService s_service = null;

public static void initialize() {
    Intent intent = new Intent(App.context(), NodeMainExecutorService.class);
    intent.setAction("org.ros.android.ACTION_START_NODE_RUNNER_SERVICE");
    intent.putExtra("org.ros.android.EXTRA_NOTIFICATION_TICKER", "");
    intent.putExtra("org.ros.android.EXTRA_NOTIFICATION_TITLE", "");
    App.context().startService(intent);
    App.context().bindService(intent, s_connection, Context.BIND_AUTO_CREATE);
}

public static void shutdown() {
    App.context().unbindService(s_connection);
    App.context().stopService(new Intent(App.context(), NodeMainExecutorService.class));
}

public static void start(MasterLocal master) {
    final String host = master.profile().getHost().get();
    final URI uri = Validation.uri("https://" + master.profile().getIpAddress() + ":11311");
    s_service.setRosHostname(host);
    s_service.setMasterUri(uri);
    s_service.execute(master, NodeConfiguration.newPublic(host, uri).setNodeName("App_master_node_for_bot_" + master.profile().getName()));
}

public static void stop(MasterLocal masterLocal) {
    s_service.shutdownNodeMain(masterLocal);
}

private static final class NodeMainExecutorServiceConnection implements ServiceConnection {
    @Override
    public void onServiceConnected(ComponentName name, IBinder binder) {
        s_service = ((NodeMainExecutorService.LocalBinder) binder).getService();
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {
        s_service = null;
    }
}

}

Please let me know if you see any errors in my code/logic, if I'm missing any fundamental RosAndroid calls, or if this simply cannot be done.

Also the followinng error logs may be of interest. Basically the connection fails after trying to register my first publisher:

E/Registrar: Exception caught while communicating with master. Handshake failed.
I/DefaultPublisher: Publisher registration failed: Publisher<PublisherDefinition<PublisherIdentifier<NodeIdentifier</App_master_node, http://10.0.0.242:46839/>, TopicIdentifier</rosout>>, Topic<TopicIdentifier</rosout>, TopicDescription<rosgraph_msgs/Log, acffd30cd6b6de30f120938c17c593fb>>>>

Thank you very much for your time!