title: Getting invalid android_key parameter error, after first time login in Facebook Android SDK
body: <p>I have got the hash key from my debug store using</p>
  
  <p>keytool -exportcert -alias androiddebugkey  -keystore C:\Users\user.android\debug.keystore | openssl sha1 -binary | openssl enc -a -e</p>
  
  <p>and pasted the key to Facebook App for Android and also enabled "Facebook Login" option.</p>
  
  <p>When I first time log into my Android App, it shows me a permission dialog and after giving the permission, I am enable to get me details from Facebook.</p>
  
  <p>But after that when i exit and the app and again open and try to login, it shows below screen.</p>
  
  <p>I don't get this, if hash key is the issues, then why it works in first attempt.</p>
  
  <p>I am using facebook sdk old version not the new 3.+ version.</p>
  
  <p><img src="https://i.stack.imgur.com/OsmpG.png" alt="Error when attempting second login"></p>