Android ROS Message crash

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This question is a continuation of a previous asked question that I made, posted at https://answers.ros.org/question/2831... . I tried to use the from this Github repository https://github.com/jubeira/ros_androi... . However I got a crash with no error message when I try to send a message.

The main idea of the functionality is to type a message to send to ROS via ROSJava that is collected from an Android Dialog Box . So say for example you send a message with the contents "Go here". My Android app would crash before the dialog box shows up. Can anyone give me an idea what is wrong with my code and a way to fix my issue?

In regards to the "Talker" class that class is a model class in my application.

I will post my code below.

  public void executeCommand(NodeMainExecutor nme){

      java.lang.String command = dialogBoxCommand();
      command.toLowerCase();

      Talker talker = new Talker();
      talker.setCommand(command);
      try{
          java.net.Socket socket = new java.net.Socket(getMasterUri().getHost(), getMasterUri().getPort());
          java.net.InetAddress local_network_address = socket.getLocalAddress();
          socket.close();
          NodeConfiguration nodeConfiguration = NodeConfiguration.newPublic(local_network_address.getHostAddress(), getMasterUri());
          nodeConfiguration.setNodeName("android/command");

          java.lang.String commandTopic = "/rosout";

          NameResolver appNameSpace = getMasterNameSpace();
          commandTopic = appNameSpace.resolve(commandTopic).toString();

          nme.execute(talker,nodeConfiguration);

      }catch (IOException e) {
          Toast.makeText(getApplicationContext(), "Unable to execute command",Toast.LENGTH_SHORT).show();
      }
  }

  protected java.lang.String dialogBoxCommand(){

      AlertDialog.Builder builder = new AlertDialog.Builder(this);
      builder.setTitle("Title");

      final EditText input = new EditText(this);

      input.setInputType(InputType.TYPE_CLASS_TEXT);
      builder.setView(input);

      builder.setPositiveButton("Start Command", new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dialog, int which) {
              final java.lang.String command = input.getText().toString();
          }
      });
      builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dialog, int which) {
              dialog.cancel();
          }
      });
      builder.show();
      return input.getText().toString();
  }