NullPointerException with android.support.v7.widget.Toolbar

Question

I am currently trying to implement a navigation drawer in my app. I am having an issue with the Toolbar being null. I have done many searches online and tried many different

Answer 1

I read another time your code...and I saw that you haven't defined the ID of your toolbar in your MainActivity XML...see your include in it :

After that...you won't get this error 'cause your toolbar is finally found and isn't set to 'null'.