Subscriber Android from C++ node

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Hi everybody! I tried to use the rosTextView of Android to display messages from a topic. The publisher is on my computer (ROS Hydro, rqt). There is no effect (the application doesn't crash), I just get this error :

E/UpdatePublisherRunnable﹕ org.ros.internal.node.xmlrpc.XmlRpcTimeoutException: org.apache.xmlrpc.client.TimingOutCallback$TimeoutException: No response after waiting for 10000 milliseconds.
I/dalvikvm﹕ Jit: resizing JitTable from 4096 to 8192

    rosTextView = (RosTextView<std_msgs.String>) findViewById(R.id.text);
    rosTextView.setMessageType(std_msgs.String._TYPE);
    rosTextView.setTopicName("/textView");
    rosTextView.setMessageToStringCallable(new MessageCallable<String, std_msgs.String>() {
        @Override
        public String call(std_msgs.String message) {
            return "ok";
        }
    });

This code worked last month and since I might have update some part of ROS, there is a bug.

Have anyone experience this case? Thank you