I\'m a newbie in android and I always see Exception when I\'m running my code.
So, somebody can tell me Can I call a method before app go to crash anywhere without \"try-cat
I think what you search is the UncaughtExceptionHandler. It is notified whenever an Exception is fired and not catched on its way bubbling up through your application.
See http://www.intertech.com/Blog/android-handling-the-unexpected/ for more details on implementing this in android.