How to get AppBar height in Flutter?

Question

How can I get the height of an AppBar in Flutter?
I am using the MarialApp Widget (\'package:flutter/material.dart\').

I have the height of my C

Answer 1

Use preferred size

//defined as
Size preferredSize

preferred size is a size whose height is the sum of kToolbarHeight and the bottom widget's preferred height.

Scaffold uses this size to set its app bar's height.

It is defined like below in app bar class which implement PreferredSizeWidget

 preferredSize = new Size.fromHeight(kToolbarHeight + (bottom?.preferredSize?.height ?? 0.0))

a link for example ...

https://github.com/flutter/flutter/blob/master/packages/flutter/lib/src/material/app_bar.dart