Question

when I using new Facebook SDK v3.0.2.b sample HelloFacebookSample, I login to Facebook but I get error:

HelloFBSample is misconfigured for Facebook login.

But I have already generate Hash key and add it to Sample App Setting on Facebook Developer site.

Is anybody get the same defect?
Or is it a bug of new SDK?

Answer 1

Sometimes the Key Hash generated using the method given by the Facebook Doc does not always work as advertised. I have faced this problem and so have a few others.

There are a couple of things you can do to sort it out.

First method

Follow the tutorial on this site: http://www.helloandroid.com/tutorials/using-facebook-sdk-android-development-part-1

This is a little time consuming (about 5 odd minutes I expect) but worked when I tried it.

Second Method (And I personally like this one)

1. Find the Util.java in the Facebook SDK and open it.
2. Among the first few lines of code, you should see this piece: private static boolean ENABLE_LOG = false;.
3. Change the false to true and run your application with your logcat (DDMD) open.
4. You should see an error that looks something like this:

Login failed: invalid_key:Android key mismatch. Your key
“**real*key***” does not match the allowed keys specified in
your application settings.

If this is for a testing APK, using the debug.keystore, this will be enough. However, if this is for an app signed with your release key, then follow the steps till Step No. 3 but instead of pushing the app from eclipse, create a signed APK and install that on your device. Don’t forget to keep it connected with DDMS running.

This part here: “**real*key***” is your actual key.