[levanphong7887]

Hi all,


I have invoked Dialog.ask(Dialog.D_YES_NO, "text") in class A that extern Thread class.

I have debuged and it have run to this line but the Dialog not occur and my program is suspended.


but Dialog.ask(Dialog.D_YES_NO, "text") work fine when It was invoked in the class that extern MainScreen class.


any suggesstion, thanks !

[Dougsg38p]

You cannot access the UI from a non-event thread.

You either need to pass this work off to the event thread, or acquire the event lock.

See UiApplication.invokeLater() for a clue. You can place the dialog in a Runnable class, then pass to invokeLater().

[levanphong7887]

Originally Posted by Dougsg38p

You cannot access the UI from a non-event thread.

You either need to pass this work off to the event thread, or acquire the event lock.

See UiApplication.invokeLater() for a clue. You can place the dialog in a Runnable class, then pass to invokeLater().

Thanks, your way make it run fine.
But when I debug i encourage another problem with UiApplication.invokeLater().

here my code:

(1) if(var == 0)
{
UiApplication.getUiApplication().invokeLater(new Runnable() 
{
	public void run() 
	{
(2)UiApplication.getUiApplication().pushScreen(Global.displayImageScreen);
	 }
	});
}

I have inserted break point into (1) and (2), but when I debug, it always jump to (2) first without check the condition if(var == 0). I don't understand, please help me, thanks !

[hrbuckley]

Are you developing with the JDE or Eclipse?

I don't understand why execution is not stopping at break point 1, but obviously it is getting there, and var == 0 or the code with break point 2 would not be executed.

On reason could be that break point 1 would be executed on one thread, and break point 2 would be executed on a different thread, the event thread. If break points are somehow disabled for the thread that is executing the code a break point 1 then you would get the behaviour you are seeing.