title: Create Facebook Android Key hash from apk file
body: <p>First I'm not an Android developer and I know almost nothing about it .
  as a vbulletin forum owner , I've got vbulletin android application .
  I got it by filling a multi-step web form with data ( api key , facebook application id , secret , site name .. etc ) .. no development .. I get only a .apk file at the end .. so I have no android development environment installed .. no key store ( I don't even know what key store is ) .. the application has integrated facebook login but when I try to use it it asks for Key Hash .. is there a way to generate that .. thank you</p>