epub_viewer 0.2.5

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

example/lib/main.dart

import 'dart:convert';
import 'dart:io';

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

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

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

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

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

  download() async {
    if (Platform.isAndroid || Platform.isIOS) {
      print('download');
      await downloadFile();
    } else {
      loading = false;
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: loading
              ? CircularProgressIndicator()
              : FlatButton(
                  onPressed: () async {
                    Directory appDocDir =
                        await getApplicationDocumentsDirectory();
                    print('$appDocDir');

                    String iosBookPath = '${appDocDir.path}/chair.epub';
                    print(iosBookPath);
                    String androidBookPath = 'file:///android_asset/3.epub';
                    EpubViewer.setConfig(
                        themeColor: Theme.of(context).primaryColor,
                        identifier: "iosBook",
                        scrollDirection: EpubScrollDirection.ALLDIRECTIONS,
                        allowSharing: true,
                        enableTts: true,
                        nightMode: true);

                    // get current locator
                    EpubViewer.locatorStream.listen((locator) {
                      print(
                          'LOCATOR: ${EpubLocator.fromJson(jsonDecode(locator))}');
                    });

                    EpubViewer.open(
                      filePath,
                      lastLocation: EpubLocator.fromJson({
                        "bookId": "2239",
                        "href": "/OEBPS/ch06.xhtml",
                        "created": 1539934158390,
                        "locations": {
                          "cfi": "epubcfi(/0!/4/4[simple_book]/2/2/6)"
                        }
                      }),
                    );

                    // await EpubViewer.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: Container(
                    child: Text('open epub'),
                  ),
                ),
        ),
      ),
    );
  }

  Future downloadFile() async {
    print('download1');

    if (await Permission.storage.isGranted) {
      await Permission.storage.request();
      await startDownload();
    } else {
      await startDownload();
    }
  }

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

    String path = appDocDir!.path + '/chair.epub';
    File file = File(path);
//    await file.delete();

    if (!File(path).existsSync()) {
      await file.create();
      await dio.download(
        'https://github.com/FolioReader/FolioReaderKit/raw/master/Example/'
        'Shared/Sample%20eBooks/The%20Silver%20Chair.epub',
        path,
        deleteOnError: true,
        onReceiveProgress: (receivedBytes, totalBytes) {
          print((receivedBytes / totalBytes * 100).toStringAsFixed(0));
          //Check if download is complete and close the alert dialog
          if (receivedBytes == totalBytes) {
            loading = false;
            setState(() {
              filePath = path;
            });
          }
        },
      );
    } else {
      loading = false;
      setState(() {
        filePath = path;
      });
    }
  }
}