I am trying to get my Blackberry application to display a custom modal dialog, and have the opening thread wait until the user closes the dialog screen.

final Screen dialog = new FullScreen();

...// Fields are added to dialog

Application.getApplication().invokeAndWait(new Runnable()
{

    public void run()
    {
        Application.getUiApplication().pushModalScreen(dialog);             
    }
});

This is throwing an Exception which says "pushModalScreen called by a non-event thread" despite the fact that I am using invokeAndWait to call pushModalScreen from the event thread.

Any ideas about what the real problem is?

Here is the code to duplicate this problem:

package com.test;

import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;

public class Application extends UiApplication {
    public static void main(String[] args)
    {
        new Application();
    }

    private Application()
    {
        new Thread()
        {
            public void run()
            {
                Application.this.enterEventDispatcher();
            }
        }.start();

        final Screen dialog = new FullScreen();
        final ButtonField closeButton = new ButtonField("Close Dialog");
        closeButton.setChangeListener(new FieldChangeListener()
        {

            public void fieldChanged(Field field, int context)
            {
                Application.getUiApplication().popScreen(dialog);
            }
        });
        dialog.add(closeButton); 
        Application.getApplication().invokeAndWait(new Runnable()
        {

            public void run()
            {
                try
                {
                    Application.getUiApplication().pushModalScreen(dialog);
                }
                catch (Exception e)
                {
                    // To see the Exception in the debugger
                    throw new RuntimeException(e.getMessage());
                }
            }
        });

        System.exit(0);
    }
}

I am using Component Package version 4.5.0.