I found my problem but not my solution
I don't kill any objects manually, i just change the setContentView
my friend google told me when that's done, java kills the obsolete objects.
But, a View object launched a thread, who is still alive,..
the Thread affects other view Objects and when i have to re put these view objects,..
the thread (that i wanted dead) is still affecting my new objects. can I kill manually this thread??
stop, interrupt and destroy are depreciated ..
I'm going tired of that.