title: how to catch the unknown exception in run time android
body: <p>I have written some android application , while doing some testing it crashes .</p>
  
  <p>but I dont know the reasin for crashing .. so I need to save the reason for crashing in some file so that later I can see that .. since I wont connect that to the PC while apllication is running , I need some suggestion to save the reason for crashing ..?</p>