findViewById returns null on a LinearLayout inside an d view

Question

I cannot figure out mistake here. I may be oevrlooking some thing...

Layout XML:

Answer 1

If you set the id attribute for the include element, then that will be the id for the root of the inflated layout. So, instead of looking for a LinearLayout with the id headerLayout look for the id headerInclude(or don't set an id for the include element).