lentera_epub_viewer 1.1.6

vocsy_epub_viewer is an epub ebook reader that encapsulates the folioreader framework.

example/lib/main.dart

import 'dart:io';

import 'package:device_info_plus/device_info_plus.dart';
import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:path_provider/path_provider.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:lentera_epub_viewer/epub_viewer.dart';

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  bool loading = false;
  Dio dio = Dio();
  String filePath = "";

  @override
  void initState() {
    download();
    super.initState();
  }

  download() async {
    if (Platform.isAndroid || Platform.isIOS) {
      String? firstPart;
      final deviceInfoPlugin = DeviceInfoPlugin();
      final deviceInfo = await deviceInfoPlugin.deviceInfo;
      final allInfo = deviceInfo.data;
      if (allInfo['version']["release"].toString().contains(".")) {
        int indexOfFirstDot = allInfo['version']["release"].indexOf(".");
        firstPart = allInfo['version']["release"].substring(0, indexOfFirstDot);
      } else {
        firstPart = allInfo['version']["release"];
      }
      int intValue = int.parse(firstPart!);
      if (intValue >= 13) {
        await startDownload();
      } else {
        if (await Permission.storage.isGranted) {
          await Permission.storage.request();
          await startDownload();
        } else {
          await startDownload();
        }
      }
    } else {
      loading = false;
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Vocsy Plugin E-pub example'),
        ),
        body: Center(
          child: loading
              ? Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    CircularProgressIndicator(),
                    Text('Downloading.... E-pub'),
                  ],
                )
              : Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    ElevatedButton(
                      onPressed: () async {
                        print("=====filePath======$filePath");
                        if (filePath == "") {
                          download();
                        } else {
                          VocsyEpub.setConfig(
                            themeColor: Theme.of(context).primaryColor,
                            identifier: "iosBook",
                            scrollDirection: EpubScrollDirection.ALLDIRECTIONS,
                            allowSharing: false,
                            enableTts: true,
                            nightMode: true,
                          );

                          // get current locator
                          VocsyEpub.locatorStream.listen((locator) {
                            print('LOCATOR: $locator');
                          });

                          VocsyEpub.open(
                            filePath,
                            lastLocation: EpubLocator.fromJson({
                              "bookId": "2239",
                              "href": "/OEBPS/ch06.xhtml",
                              "created": 1539934158390,
                              "locations": {"cfi": "epubcfi(/0!/4/4[simple_book]/2/2/6)"}
                            }),
                          );
                        }
                      },
                      child: Text('Open Online E-pub'),
                    ),
                    ElevatedButton(
                      onPressed: () async {
                        VocsyEpub.setConfig(
                          themeColor: Theme.of(context).primaryColor,
                          identifier: "iosBook",
                          scrollDirection: EpubScrollDirection.ALLDIRECTIONS,
                          allowSharing: false,
                          enableTts: true,
                          nightMode: true,
                        );
                        // get current locator
                        VocsyEpub.locatorStream.listen((locator) {
                          print('LOCATOR: $locator');
                        });
                        await VocsyEpub.openAsset(
                          'assets/4.epub',
                          lastLocation: EpubLocator.fromJson({
                            "bookId": "2239",
                            "href": "/OEBPS/ch06.xhtml",
                            "created": 1539934158390,
                            "locations": {"cfi": "epubcfi(/0!/4/4[simple_book]/2/2/6)"}
                          }),
                        );
                      },
                      child: Text('Open Assets E-pub'),
                    ),
                  ],
                ),
        ),
      ),
    );
  }

  startDownload() async {
    Directory? appDocDir = Platform.isAndroid ? await getExternalStorageDirectory() : await getApplicationDocumentsDirectory();

    String path = appDocDir!.path + '/sample.epub';
    File file = File(path);

    if (!File(path).existsSync()) {
      await file.create();
      await dio.download(
        "https://vocsyinfotech.in/envato/cc/flutter_ebook/uploads/22566_The-Racketeer---John-Grisham.epub",
        path,
        deleteOnError: true,
        onReceiveProgress: (receivedBytes, totalBytes) {
          setState(() {
            loading = true;
          });
        },
      ).whenComplete(() {
        setState(() {
          loading = false;
          filePath = path;
        });
      });
    } else {
      setState(() {
        loading = false;
        filePath = path;
      });
    }
  }
}