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

Answer is a little late but I just ran into this problem.

I had a similar issue and spent 7 hrs messing with it. It worked on 3 of 4 activities just fine but one would crash.

The only thing that worked for me, and I am not sure why, was to put the:

    mToolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(mToolbar);
    getSupportActionBar().setDisplayShowHomeEnabled(true); 

as the last code in my onCreate. It works perfectly now.