I may not have expressed myself clearly enought...
When I say Preferences Screen, I mean Preferences Activity...using the prefences activity library...wich has NO event available...So even the back button press is NOT trapped.
On start-up, I check to see it the Preferences item count is diferent than zero, and if not, re-direct the user to enter the preferences...all goes well in that point.
My problem is when/if the user changes those preferences afterwards, during program flow...The Flow gets alted after the user returns to the program...
What I would like to do, is to, when the user exits the preferences Activity, to have the app Start/Re-Start from a given point...
[EDIT]
Using the logger I saw that the app is actualy Paused/Resumed so I setted a Flag to know if the resume is done after calling the Preferences intend...Seems to work OK