Achin questions

• (#200) The user hasn't authorized the application to perform this action android facebook SDK
• android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application [duplicate]
• Flutter: Http post request Error Invalid media type: expected
• android Dx warning: Ignoring InnerClasses attribute for an anonymous inner class jar file issue
• Onclick on view pager in android does not work in my code

Achin answers