Facebook Login setup

⇒ Go to https://developers.facebook.com/apps

⇒ Select Consumer and Continue:

⇒ Enter your app name, contact email. Then click on Create App:

⇒ The from Add Product click on Facebook Login setup button:

⇒ Choose Android:

⇒ Keep clicking on next button till the option 3:

• Enter your package name
• Enter default activity class name. Just add (.Splash) after entering your package name.
• Click on Save. If popup appears click on Use this package name.
• Click Continue button.

⇒ Obtain Hash key:

Key hash creation for Facebook (Release hash only)

• Download openssl https://code.google.com/archive/p/openssl-for-windows/downloads
• Extract somewhere
• Start command prompt
• Locate your JDK bin directory and change path to that directory by cd command.
• For example if your JDK path is c:\Program Files\Java\sdk-xx.x.x\bin\ then in command prompt write cd c:\Program Files\Java\sdk-xx.x.x\bin\
• The use this command tool in your command prompt:
  keytool -exportcert -alias YOUR_RELEASE_KEY_ALIAS -keystore YOUR_RELEASE_KEY_PATH | openssl_full_path sha1 -binary | openssl_full_path base64
  
  example:keytool -exportcert -alias key0 -keystore C:\Users\Profilename \keystore_backup\ myproject.jks | C:\Users\Profilename \Desktop\openssl-0.9.8k_X64\bin\openssl sha1 -binary | C:\Users\Profilename \Desktop\openssl-0.9.8k_X64\bin\openssl base64
• Enter your keystore password (if it's default debug.keystore then password probably android)
• Get the release key hash

⇒ In option 4 put the key here in Facebook login setup page:

⇒ Now keep clicking on next button till the end.

⇒ Then add/edit according to the screenshots:

⇒ Now get the Facebook App ID:

⇒ Update your settings.xml from Android Studio:

Note: value of facebook_app_id is your actual Facebook App ID and fb_login_protocol_scheme will be fb prefixed APP ID like: fb[your_app_id]