I have installed android studio 2.2 and created new project but gradle sync failed every time and getting following exception.
Error:Cause: java.lang.NullPoi
Though the question has an accepted answer, but in my case with opening Android Studio 2.2.1 (though not actually only Gradle Sync), I opened the bin/idea.properties file inside the android-studio installation folder and had inserted the following line as suggested in this video:
disable.android.first.run=true
Then restarting Android-Studio has solved the NullPointerException.