Android: How to receive process signals in an activity to kill child process?

My application calls Runtime.exec() to launch an executable in a separate process at start up time. I would like this child process to get killed when the parent activity exits. Now I can use onDestroy() to handle regular cases, but not "Force quit", shutdowns from DDMS, or kill from the console since those don't run onDestroy(). The addShutdo开发者_开发百科wnHandler() does not seem to be invoked in these cases either.

Is there any other hook or signal handler that informs my activity that it's about to get terminated ? As an alternative is there a way to have the system automatically kill the child process when the parent dies ?

int main() {
  // Spawn a new thread here to do your work
  start_thread();

  char dummy[10]; 
  gets(dummy);
  // When parent dies we reach this line, before that process is blocked in gets line above
  return 0;
}