Facebook Login on Android App

Facebook login feature. Be specific, once the users have successful log on, the application should get the user profile picture, ID and name

Once the users click on the Facebook login button, the authentication is done via the referenced Facebook SDK library. To successfully run the Facebook Login, I have to add in Android development key hash to my Facebook developer profile. Facebook uses the key hash to authenticate interactions between the app and the Facebook app. To generate key hash I had installed openSSL then go to command line to get the key hash from the keystore

Following the Facebook developer guideline, there was the key hash discrepancy problem while logging into the Facebook. To generate key hash again, I had installed openSSL then went to command line to get the key hash from the keystore