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i want to download my certificate as pdf or png in flutter

Bad Badger answered on March 27, 2024 Popularity 1/10 Helpfulness 1/10

answer i want to download my certificate as pdf or png in flutter

i want to download my certificate as pdf or png in flutter

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import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:path_provider/path_provider.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;

class CertificateDownloadScreen extends StatefulWidget {
  @override
  _CertificateDownloadScreenState createState() =>
      _CertificateDownloadScreenState();
}

class _CertificateDownloadScreenState extends State<CertificateDownloadScreen> {
  GlobalKey _certificateKey = GlobalKey();

  Future<void> _captureAndSavePng() async {
    try {
      RenderRepaintBoundary boundary =
          _certificateKey.currentContext.findRenderObject();
      ui.Image image = await boundary.toImage(pixelRatio: 3.0);
      ByteData byteData =
          await image.toByteData(format: ui.ImageByteFormat.png);
      Uint8List pngBytes = byteData.buffer.asUint8List();

      final tempDir = await getTemporaryDirectory();
      final file = await new File('${tempDir.path}/certificate.png').create();
      await file.writeAsBytes(pngBytes);
      print('File saved to: ${file.path}');
    } catch (e) {
      print(e);
    }
  }

  Future<void> _captureAndSavePdf() async {
    try {
      RenderRepaintBoundary boundary =
          _certificateKey.currentContext.findRenderObject();
      ui.Image image = await boundary.toImage(pixelRatio: 3.0);
      ByteData byteData =
          await image.toByteData(format: ui.ImageByteFormat.rawRgba);
      Uint8List pngBytes = byteData.buffer.asUint8List();

      final pdf = pw.Document();

      pdf.addPage(pw.Page(
          build: (pw.Context context) => pw.Image(
                pw.MemoryImage(pngBytes),
                width: double.infinity,
                height: double.infinity,
              )));

      final tempDir = await getTemporaryDirectory();
      final file = await new File('${tempDir.path}/certificate.pdf').create();
      await file.writeAsBytes(await pdf.save());
      print('File saved to: ${file.path}');
    } catch (e) {
      print(e);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Certificate Download'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            RepaintBoundary(
              key: _certificateKey,
              child: Container(
                width: 200,
                height: 200,
                color: Colors.blue,
                child: Center(
                  child: Text(
                    'Certificate',
                    style: TextStyle(
                      fontSize: 24,
                      fontWeight: FontWeight.bold,
                      color: Colors.white,
                    ),
                  ),
                ),
              ),
            ),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: () async {
                await _captureAndSavePng();
                // Check and request storage permission if necessary
                var status = await Permission.storage.status;
                if (!status.isGranted) {
                  await Permission.storage.request();
                }
              },
              child: Text('Download as PNG'),
            ),
            SizedBox(height: 10),
            ElevatedButton(
              onPressed: () async {
                await _captureAndSavePdf();
                // Check and request storage permission if necessary
                var status = await Permission.storage.status;
                if (!status.isGranted) {
                  await Permission.storage.request();
                }
              },
              child: Text('Download as PDF'),
            ),
          ],
        ),
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: CertificateDownloadScreen(),
  ));
}

Popularity 1/10 Helpfulness 1/10 Language whatever

Source: Grepper

Tags: certificate download flutter pdf png whatever

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Contributed on Mar 27 2024

Bad Badger

0 Answers Avg Quality 2/10

i want to download my certificate as pdf or png in flutter

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