Building forms the manual way

Flutter has two primary ways of building forms. The first uses TextField and similar input field widgets and updates the field values and validation manually. To understand how TextField works, let’s start by building our contacts form with it.

Open contact_edit_view.dart and replace the Scaffold.body property with the following code:

      body: ListView( 
        padding: const EdgeInsets.symmetric( 
          horizontal: 16, 
          vertical: 32, 
        ), 
        children: const [ 
          Padding( 
            padding: EdgeInsets.symmetric(horizontal: 
    ...