I am using Facebook login in android.
Code:
callbackManager = CallbackManager.Factory.create();
LoginButton loginButton = (LoginButt
All of the above answers didn't help me, what did was when you use this command
keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore | openssl sha1 -binary | openssl base64
to get the Key Hashes you put in facebook configurations.
it will ask you for a password, at first I didn't set any, so the issue happened, when I entered android as the password. it worked !