rosjava: Get List of Parameters

asked 2013-02-13 00:37:19 -0600

dberm22
93 ●4 ●6 ●13

updated 2013-02-14 01:14:53 -0600

I am developing with ros on an android tablet, and I am trying to change parameters using the device (as a remote, so to speak). However, I am having trouble doing so. Has anyone done this?

Here is my attempt:

    NodeConfiguration nodeConfiguration = NodeConfiguration.newPublic( InetAddressFactory.newNonLoopback().getHostAddress());
    nodeConfiguration.setMasterUri(URI.create(IP_ADDRESS));
    ListView ParamListView = (ListView) findViewById(R.id.ParamListView);
    final String[] NodeName = url.split("=");
    ScheduledExecutorService scheduledExecutorService = Executors.newScheduledThreadPool(Integer.MAX_VALUE);
    NodeFactory nodeFactory = new DefaultNodeFactory(scheduledExecutorService);
    Node node = nodeFactory.newNode(nodeConfiguration);
    ConnectedNode connectednode = (ConnectedNode) node;
    final ParameterTree ParamList = connectednode.getParameterTree();
    //final ParameterTree ParamList = (ParameterTree) new ArrayList<String>();
    @SuppressWarnings("unchecked")
    List<String> ParamJavaList = (List<String>) ParamList.getList(NodeName[1]);
    final ArrayAdapter<String> ParamListAdapter = new ArrayAdapter<String>(this, android.R.id.text1, ParamJavaList);
    ParamListView.setAdapter(ParamListAdapter);

What am I doing wrong? I am not sure how to copy and paste my error log, but the error is is occurring before my call of getList().

If I uncomment the commented line and comment out the 5 lines before it, I get an error saying I cannot cast from ArrayList to ParameterTree. That is how I got to this convoluted point of trying to initialize the ParamList using getParameterTree(), which requires access to the connected node.

I am sure there is an easier way to do this, but I am not aware of it.

Thanks in advance!

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JSch jsch=new JSch(); Properties config = new Properties(); config.put("StrictHostKeyChecking", "no"); config.put("compression.s2c", "zlib,none"); config.put("compression.c2s", "zlib,none"); this.user = params[0]; this.host = params[1]; this.pwd = params[2]; this.cmd = params[3]; session=jsch.getSession(user, host, 22); session.setConfig(config); session.setPassword(pwd); session.connect(); StringBuffer result = new StringBuffer(); channelexec = (ChannelExec) session.openChannel("exec"); String setPATH = "source /opt/ros/fuerte/setup.bash;export ROS_PACKAGE_PATH=/home/YOURCOMPNAME/ros_workspace:/opt/ros/fuerte/share:/opt/ros/fuerte/stacks;"; channelexec.setCommand(setPATH+cmd);// channelexec.setInputStream(null); //channel.setOutputStream(System.out); channelexec.setErrStream(System.err); InputStream stdout = channelexec.getInputStream(); InputStream stderr = channelexec.getErrStream(); //channelexec.setPty(true); channelexec.connect(); msg = "Connected to Host"; toastHandler.post(toastRunnable); String aux = ""; BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(stdout)); while ((aux=bufferedReader.readLine()) != null) { aux.replaceAll(NodeName,""); builder.append(","+aux); } }catch(Exception e){ msg = "Cannot Retrieve Param List"; toastHandler.post(toastRunnable); e.printStackTrace(); } return builder.toString().substring(1);

Comments

This is more of a workaround then a solution, please consider removing "selected answer"

OzzieTheHead ( 2018-08-09 12:54:40 -0600 )edit

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