title: Invalid hash key error while integrating facebook login with android
body: <p>I was displayed with a message saying " invalid hash key . the hash key ********** is not ... " . But I copied this key into the MyApp/Settings/keyhash . Yet is doesn't work .</p>
  
  <p>I tried generating the hash key with the command <code>keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore | openssl sha1 -binary | openssl base64</code>.</p>
  
  <p>This generated another hash key ,even  after i updated My app with the new key . The app still does not work .</p>
  
  <p>I had this app initially in an other computer ,it work fine there . Only after shifting the project to a new computer all these issues have come .</p>
  
  <p>these are my logcat values :</p>
  
  <pre><code>07-28 13:06:40.446  15812-15812/com.zobbr.mettl.zobbr I/System.out﹕ waiting for debugger to settle...
  07-28 13:06:40.646  15812-15812/com.zobbr.mettl.zobbr I/System.out﹕ waiting for debugger to settle...
  07-28 13:06:40.847  15812-15812/com.zobbr.mettl.zobbr I/System.out﹕ waiting for debugger to settle...
  07-28 13:06:41.047  15812-15812/com.zobbr.mettl.zobbr I/System.out﹕ waiting for debugger to settle...
  07-28 13:06:41.249  15812-15812/com.zobbr.mettl.zobbr I/System.out﹕ waiting for debugger to settle...
  07-28 13:06:41.450  15812-15812/com.zobbr.mettl.zobbr I/System.out﹕ debugger has settled (1359)
  07-28 13:06:41.627  15812-15812/com.zobbr.mettl.zobbr D/Your Tag﹕ bPx5YeVB5lOVc+oiEwo/VWuV8+k=
  07-28 13:06:41.641  15812-15812/com.zobbr.mettl.zobbr D/SVGAndroid﹕ UNRECOGNIZED SVG COMMAND: switch
  07-28 13:06:41.641  15812-15812/com.zobbr.mettl.zobbr D/SVGAndroid﹕ UNRECOGNIZED SVG COMMAND: foreignObject
  07-28 13:06:41.641  15812-15812/com.zobbr.mettl.zobbr D/SVGAndroid﹕ UNRECOGNIZED SVG COMMAND: pgfRef
  07-28 13:06:41.648  15812-15812/com.zobbr.mettl.zobbr D/SVGAndroid﹕ UNRECOGNIZED SVG COMMAND: pgf
  07-28 13:06:41.664  15812-15812/com.zobbr.mettl.zobbr D/SVGAndroid﹕ UNRECOGNIZED SVG COMMAND: switch
  07-28 13:06:41.664  15812-15812/com.zobbr.mettl.zobbr D/SVGAndroid﹕ UNRECOGNIZED SVG COMMAND: foreignObject
  07-28 13:06:41.664  15812-15812/com.zobbr.mettl.zobbr D/SVGAndroid﹕ UNRECOGNIZED SVG COMMAND: pgfRef
  </code></pre>