Can't find Toolbar in an included layout

Question

I have a Toolbar which has a custom TextView inside:

Answer 1

You are overriding the id of toolbar in the include tag. So the R.id.toolbar is no longer id of your included toolbar for your activity but now it is R.id.app_bar instead.

If you keep the id in include tag then use following code to access your toolbar:

Toolbar toolbar = (Toolbar) activity.findViewById(R.id.app_bar);