java.lang.NoSuchFieldError: android.support.v7.appcompat

Question

I updated my support library from r20 to r21, now when I run my app I get this error in super.onCreate of my main activity :

java.lang.NoSuchFieldE         


        

Answer 1

I have compared support_v7_appcompat (version 20) with support_v7_appcompat (version 21). In res/values/attrs.xml (version 21), windowActionBar attributes are not in