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Offline Matzon

JGO Knight


Medals: 19
Projects: 1


I'm gonna wring your pants!


« Posted 2004-07-22 09:45:47 »

I am having some problems with a TextBox returning 0 on a textBox.getString().length(), even thought there is text entered into it.

I've tried *every* method on a TextBox just to get something out of it. I have only been able to reproduce it on a Nokia 7250, and it only occurs once in a while, often the entered text comes out right -  bit puzzling!

I've been unable to find anything remotely similar using google :/

Offline Matzon

JGO Knight


Medals: 19
Projects: 1


I'm gonna wring your pants!


« Reply #1 - Posted 2004-07-22 12:56:22 »

bah - Strike one up for Nokia - again.
Device bug it would seem. This simple test *sometimes* fails after typing some input.

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package dk.certus;

import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

import javax.microedition.lcdui.*;

/**
 * @author Brian Matzon <matzon@certus.dk>
 */

public class TT extends MIDlet implements CommandListener {

    private Form form;

    private TextBox textBox;
    private Command sendCommand;
    private Command cancelCommand;

    /**
     * Creates a new MIDletLauncher
     */

    public TT() {
        super();
    }

    /**
     * Proxies the call to the SystemController
     *
       * @see javax.microedition.midlet.MIDlet#startApp()
       */

    protected void startApp() throws MIDletStateChangeException {
      form = new Form("Empty");
      form.addCommand(new Command("Action", Command.SCREEN, 1));
      form.setCommandListener(
        new CommandListener() {
          public void commandAction(Command c, Displayable d) {
            showTextBox();
          }
      });
      Display.getDisplay(this).setCurrent(form);
    }

    /**
       * Proxies the call to the SystemController
       *
       * @see javax.microedition.midlet.MIDlet#pauseApp()
       */

    protected void pauseApp() {
    }

    /**
       * Proxies the call to the SystemController
       *
       * @see javax.microedition.midlet.MIDlet#destroyApp(boolean)
       */

    protected void destroyApp(boolean unconditional) throws MIDletStateChangeException {
    }
   
    private void showTextBox() {
      sendCommand = new Command("Send", Command.OK, 1);
      cancelCommand = new Command("Cancel", Command.CANCEL, 2);
      textBox = new TextBox("To", null, 350, TextField.ANY);
      textBox.addCommand(sendCommand);
      textBox.addCommand(cancelCommand);
      textBox.setCommandListener(this);
      Display.getDisplay(this).setCurrent(textBox);
    }      
   
    public void commandAction(Command command, Displayable displayable) {
        String message;
        // if send action, craft a message for symfoni
       if(command == sendCommand && textBox.getString().length() > 0) {
          message = textBox.getString();
        } else {
          char[] chars = new char[256];
          textBox.getChars(chars);
          message = "Error\n";
          message += "Type: " + command.getCommandType();
          message += "Label: " + command.getLabel();
          message += "String: " + textBox.getString();
          message += "Length: " + textBox.getString().length();
          message += "Chars: " + new String(chars);
          message += "Size: " + textBox.size();
          message += "CaretPosition: " + textBox.getCaretPosition();
        }

        // yes create a new one each time - the error occurs regardless
       textBox = null;
        sendCommand = null;
        cancelCommand = null;
       
        Alert alert = new Alert("Result", message, null, null);
        alert.setTimeout(Alert.FOREVER);
        Display.getDisplay(this).setCurrent(alert, form);
    }    
}

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