Export Flutter application screen to PDF

You can use pdf/printing this way:

import 'package:flutter/material.dart';import 'package:flutter/rendering.dart';import 'package:pdf/pdf.dart';import 'package:pdf/widgets.dart' as pw;import 'package:printing/printing.dart';void main() {  runApp(MaterialApp(home: MyApp()));}class MyApp extends StatelessWidget {  final GlobalKey<State<StatefulWidget>> _printKey = GlobalKey();  void _printScreen() {    Printing.layoutPdf(onLayout: (PdfPageFormat format) async {      final doc = pw.Document();      final image = await WidgetWraper.fromKey(        key: _printKey,        pixelRatio: 2.0,      );      doc.addPage(pw.Page(          pageFormat: format,          build: (pw.Context context) {            return pw.Center(              child: pw.Expanded(                child: pw.Image(image),              ),            );          }));      return doc.save();    });  }  @override  Widget build(BuildContext context) {    return Scaffold(      body: Center(        child: Column(          mainAxisAlignment: MainAxisAlignment.spaceEvenly,          children: <Widget>[            RepaintBoundary(              key: _printKey,              child:                  // This is the widget that will be printed.                  const FlutterLogo(                size: 300,              ),            ),          ],        ),      ),      floatingActionButton: FloatingActionButton(        child: const Icon(Icons.print),        onPressed: _printScreen,      ),    );  }}