title: Facebook Unity SDK on Android - Login fails when FB App installed
body: <p>I appear to be having the same issue as discussed in this question:
  <a href="https://stackoverflow.com/questions/18959004/facebook-sdk-for-unity-on-android-trouble-about-callback-from-fb-login">Facebook SDK for Unity on Android - Trouble about callback from FB.Login</a></p>
  
  <p>On Android when the regular Facebook app is installed, calls to FB.Login() using the Unity SDK prompt the user to accept permissions for the app and when the app is approved the callback is fired with:
  FBResult.Text</p>
  
  <p><code>{"is_logged_in":false,"user_id":"","access_token":""}</code></p>
  
  <p>FBResult.Error</p>
  
  <p><code>null</code></p>
  
  <p>When the Facebook app is installed the web flow is used and works fine, I have however tried this with v4.2.4 and v4.2.2 of the Unity SDK.</p>
  
  <p>Any other advice on getting this resolved?</p>
  
  <p>EDIT: Should also note, I've tried this on 2 different devices (Galaxy Note 10.1 and Nexus 7)</p>
  
  <p>Thanks in advance!</p>
  
  <hr>
  
  <p>A note for 2014.  In some cases the problem is very simply that you've forgotten the settings on developers.facebook. Brian explains it here with images: <a href="http://answers.unity3d.com/questions/543540/facebook-sdk-v424-android-login-not-working.html" rel="nofollow noreferrer">http://answers.unity3d.com/questions/543540/facebook-sdk-v424-android-login-not-working.html</a> Confusingly it WILL WORK (!) on devices WITHOUT the fb app, if you have completely forgotten the settings. As to the actual problem, fortunately <strong>there is a solution</strong> even if you are using Unity on Mac and it is simple: <a href="http://answers.unity3d.com/questions/609810/using-facebook-api-with-android-says-login-is-canc.html" rel="nofollow noreferrer">http://answers.unity3d.com/questions/609810/using-facebook-api-with-android-says-login-is-canc.html</a></p>