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

Set the id attribute in the Toolbar xml like this:

Then remove it from the include block so it looks like this:

And to simplify further you could just remove the include block completely and simply insert the Toolbar directly into the xml where the include was.