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Run Project ​

  1. Open lib/main.dart and replace the entire content with the following code. And fill in the license provided to you in the ComPDFKit.init method.

There are 2 different ways to use ComPDFKit Flutter API:

  • Present a document via a plugin.
  • Show a ComPDFKit document view via a Widget.

Usage Plugin ​

Open lib/main.dart,replace the entire file with the following:

dart
import 'dart:io';

import 'package:compdfkit_flutter/compdfkit.dart';
import 'package:compdfkit_flutter/configuration/cpdf_configuration.dart';

import 'package:flutter/material.dart';

const String _documentPath = 'pdfs/PDF_Document.pdf';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  void initState() {
    super.initState();
    _init();
  }

  void _init() async {
    /// Please replace it with your ComPDFKit license
    ComPDFKit.initialize(androidOnlineLicense : 'your compdfkit key', iosOnlineLicense : 'your compdfkit key');

    /// If you are using an offline certified license, please use init() method
    // ComPDFKit.init('your compdfkit key');
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
          body: SafeArea(
              child: Center(
                child: ElevatedButton(
                    onPressed: () async {
                      showDocument(context);
                    },
                    child: const Text(
                      'Open Document',
                      style: TextStyle(color: Colors.white),
                    )),
              ))),
    );
  }

  void showDocument(BuildContext context) async {
    final bytes = await DefaultAssetBundle.of(context).load(_documentPath);
    final list = bytes.buffer.asUint8List();
    final tempDir = await ComPDFKit.getTemporaryDirectory();
    var pdfsDir = Directory('${tempDir.path}/pdfs');
    pdfsDir.createSync(recursive: true);

    final tempDocumentPath = '${tempDir.path}/$_documentPath';
    final file = File(tempDocumentPath);
    if (!file.existsSync()) {
      file.create(recursive: true);
      file.writeAsBytesSync(list);
    }
    var configuration = CPDFConfiguration();
    // Present a document via a plugin.
    ComPDFKit.openDocument(tempDocumentPath,
        password: '', configuration: configuration);
  }
}

Usage Widget ​

Open lib/main.dart,replace the entire file with the following:

dart
import 'dart:io';

import 'package:compdfkit_flutter/compdfkit.dart';
import 'package:compdfkit_flutter/configuration/cpdf_configuration.dart';
import 'package:compdfkit_flutter/widgets/cpdf_reader_widget.dart';

import 'package:flutter/material.dart';

const String _documentPath = 'pdfs/PDF_Document.pdf';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String? _document;

  @override
  void initState() {
    super.initState();
    _init();
    _getDocumentPath(context).then((value) {
      setState(() {
        _document = value;
      });
    });
  }

  void _init() async {
    /// Please replace it with your ComPDFKit license
    ComPDFKit.initialize(
         androidOnlineLicense: 'your compdfkit key',
         iosOnlineLicense: 'your compdfkit key');

    /// If you are using an offline certified license, please use init() method
    // ComPDFKit.init('your compdfkit key');
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        resizeToAvoidBottomInset: false,
        appBar: AppBar(
          title: const Text('Dark Theme Example'),
        ),
        body: _document == null
        ? Container()
        : CPDFReaderWidget(
          document: _document!,
          configuration: CPDFConfiguration(),
          onCreated: (_create) => {})));
  }

  Future<String> _getDocumentPath(BuildContext context) async {
    final bytes = await DefaultAssetBundle.of(context).load(_documentPath);
    final list = bytes.buffer.asUint8List();
    final tempDir = await ComPDFKit.getTemporaryDirectory();
    var pdfsDir = Directory('${tempDir.path}/pdfs');
    pdfsDir.createSync(recursive: true);

    final tempDocumentPath = '${tempDir.path}/$_documentPath';
    final file = File(tempDocumentPath);
    if (!file.existsSync()) {
      file.create(recursive: true);
      file.writeAsBytesSync(list);
    }
    return tempDocumentPath;
  }
}
  1. Add the PDF documents you want to display in the project

  • create a pdf directory

    bash
    mkdir pdfs

  • Copy your example document into the newly created pdfs directory and name it PDF_Document.pdf

  1. Specify the assets directory in pubspec.yaml
diff
 flutter:
+  assets:
+    - pdfs/
  1. Launch your Android, iOS emulator, or connect your device.
shell
flutter emulators --launch apple_ios_simulator
  1. Run the app with:
bash
flutter run