Web and WebWorks Development

[chicoxml]

Hello everyone.

I'm trying to open a java popupscreen from an extention, and is showing me the following error, tell me I'm doing wrong or if there is an example.

java.lang.IllegalStateException: UI engine accessed without holding the event lock.

package samplecode;

import net.rim.device.api.script.ScriptableFunction;
import net.rim.device.api.system.Alert;
import net.rim.device.api.ui.UiApplication;

public final class AlertFunction extends ScriptableFunction {

	public Object invoke(Object obj, Object[] args) throws Exception {
	   if (!Alert.isVibrateSupported()) {
	      return UNDEFINED;
	   }
	   if (args.length == 1) {
	      int duration = ((Integer)args[0]).intValue();
	      Alert.startVibrate(duration);
	      box vbox = new box();
	    	UiApplication.getUiApplication().pushScreen(vbox);
	    	//UiApplication.getUiApplication().popScreen(vbox);
	   }
	   return UNDEFINED;
	}
}

package samplecode;

import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.component.ButtonField;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.PopupScreen;
import net.rim.device.api.ui.container.VerticalFieldManager;

public class box extends PopupScreen {

	/**
	 * 
	 */
	public box() {
		super(new VerticalFieldManager());
		LabelField labelField = new LabelField("Popup Screen",
				Field.FIELD_HCENTER);
		add(labelField);
		ButtonField btnfldOk = new ButtonField("OK", ButtonField.CONSUME_CLICK
				| Field.FIELD_HCENTER);
		btnfldOk.setMinimalWidth(100);
		add(btnfldOk);
		ButtonField btnfldCancel = new ButtonField("Cancel",
				ButtonField.CONSUME_CLICK | Field.FIELD_HCENTER);
		add(btnfldCancel);
		// TODO Auto-generated constructor stub
	}

}

[hababut · Accepted solution]

Hi chicoxml,

This line is your problem:

UiApplication.getUiApplication().pushScreen(vbox);

The issue and the solution is described very well in this thread. Check it out, and let me know if it solved it for you:

http://supportforums.blackberry.com/t5/Java-Development/updating-UI-from-system-thread-ui-engine-acc...

[chicoxml]

Thanks friend was very helpful.