How to know when a setCurrent take effect

[zivgr]

How can I know or be notified when a call for Display.setCurrent take effact?

[jozart]

In a Canvas subclass, you can override hideNotify ad showNotify.

Displayable itself only has an isShown method.

If you want to get complicated, you can use an invisible Canvas as a gatekeeper. See AlertRouter in this article by Eric Giguere:

http://wireless.java.sun.com/midp/ttips/multialerts/

[zivgr]

Many thnaks for your answer.
The problem is that I use Forms and Lists and not Canvas.
Any suggestions for Forms?

[doctordwarf]

I use Display.callSerially(Runnable r)

It calls your code "soon after completion of the repaint cycle".
In particular right after showing your Form or List.