Sorry for asking the same question, but I read all the threads posted before and tried everything suggested, but I was still unsuccessful.
I am getting the same:
App is misconfigured for Facebook login.

The issue looks same as here, but I could not get the Logcat printed as an error in red even after setting ENABLE_LOG to true in util.java.
I have checked my app_id and copied the hash key in developer.facebook, and everything looks right. But I don’t know where I am going wrong and also that I am getting it right when I use the app without native Facebook app.
But I want to login using native Facebook.
Assuming you’re using the latest 3.0 SDK, try the following two options:
Option 1: (Windows)
Example:
Use the password: android
Option 2: (Print key hash sent to FB)
(A variation of Facebook SDK for Android – Example app won't work)
Add this code to your activity:
Example:
In HelloFacebookSampleActivity, make the following temporary modification to the onCreate() method
Run your sample and you should get logcat output on the KeyHash tag similar to:
Use that value in Facebook’s App Dashboard settings for your app.