flutter printing
https://github.com/DavBfr/dart_pdf/tree/master/printing/example/lib
Problem is here.
image: const fw.NetworkImage('https://www.gravatar.com/avatar/00000000000000000000000000000000?d=mp&s=200'),
Change to
import 'package:flutter/painting.dart' as fp;
find this and change
image: new fp.AssetImage("images/a123.png"),
OK~