title: Android: How to receive process signals in an activity to kill child process?
body: <p>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 addShutdownHandler() does not seem to be invoked in these cases
  either.</p>
  
  <p>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 ? </p>