Hi everybody, just to share my error...
The activity was a camera. I wrote a sub to stoppreview and release camera, but I called a callsubdelayed(me, "termina") followed by activity.finish. Doing this the camera was never released, because the delayed call was not able to find the sub. I saw this exploring the Java source.
I changed to simple call : termina.... EVVAIIIII(translation HERE WE GOOO!) ! I did it!
Thank for