更改安卓端的文件访问方式，优化导入逻辑 (#64)

* Refactor import function & Allow import local comics without copying them to local path.

* android: use file_picker instead, support directory access for android 10

* Improve import logic

* Fix sql query.

* Add ability to remove invalid favorite items.

* Perform sort before choosing cover

* Revert changes of "use file_picker instead".

* Try catch on "check update"

* Added module 'flutter_saf'

* gitignore

* remove unsupported arch in build.gradle

* Use flutter_saf to handle android's directory and files, improve import logic.

* revert changes of 'requestLegacyExternalStorage'

* fix cbz import

* openDirectoryPlatform

* Remove double check on source folder

* use openFilePlatform

* remove unused import

* improve local comic's path handling

* bump version

* fix pubspec format

* return null when comic folder is empty

android/.gitignore

@@ -11,3 +11,4 @@ GeneratedPluginRegistrant.java
 key.properties
 **/*.keystore
 **/*.jks
+/app/.cxx/

android/app/build.gradle

@@ -34,6 +34,8 @@ android {
 
     splits{
         abi {
+            reset()
+            include 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64'
             enable true
             universalApk true
         }

assets/translation.json

@@ -239,6 +239,9 @@
     "Chapter @ep": "第 @ep 章",
     "Page @page": "第 @page 页",
     "Also remove files on disk": "同时删除磁盘上的文件",
+    "Copy to app local path": "将漫画复制到本地存储目录中",
+    "Delete all unavailable local favorite items": "删除所有无效的本地收藏",
+    "Deleted @a favorite items.": "已删除 @a 条无效收藏",
     "New version available": "有新版本可用",
     "A new version is available. Do you want to update now?" : "有新版本可用。您要现在更新吗？",
     "No new version available": "没有新版本可用"
@@ -483,6 +486,9 @@
     "Chapter @ep": "第 @ep 章",
     "Page @page": "第 @page 頁",
     "Also remove files on disk": "同時刪除磁盤上的文件",
+    "Copy to app local path": "將漫畫複製到本地儲存目錄中",
+    "Delete all unavailable local favorite items": "刪除所有無效的本地收藏",
+    "Deleted @a favorite items.": "已刪除 @a 條無效收藏",
     "New version available": "有新版本可用",
     "A new version is available. Do you want to update now?" : "有新版本可用。您要現在更新嗎？",
     "No new version available": "沒有新版本可用"

lib/foundation/favorites.dart

@@ -4,6 +4,7 @@ import 'package:flutter/foundation.dart';
 import 'package:sqlite3/sqlite3.dart';
 import 'package:venera/foundation/appdata.dart';
 import 'package:venera/foundation/image_provider/local_favorite_image.dart';
+import 'package:venera/foundation/local.dart';
 import 'package:venera/foundation/log.dart';
 import 'dart:io';
 
@@ -496,6 +497,22 @@ class LocalFavoritesManager with ChangeNotifier {
     notifyListeners();
   }
 
+  Future<int> removeInvalid() async {
+    int count = 0;
+    await Future.microtask(() {
+      var all = allComics();
+      for(var c in all) {
+        var comicSource = c.type.comicSource;
+        if ((c.type == ComicType.local && LocalManager().find(c.id, c.type) == null) 
+          || (c.type != ComicType.local && comicSource == null)) {
+          deleteComicWithId(c.folder, c.id, c.type);
+          count++;
+        }
+      }
+    });
+    return count;
+  }
+
   Future<void> clearAll() async {
     _db.dispose();
     File("${App.dataPath}/local_favorite.db").deleteSync();

lib/foundation/image_provider/cached_image.dart

@@ -3,6 +3,7 @@ import 'dart:io';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:venera/network/images.dart';
+import 'package:venera/utils/io.dart';
 import 'base_image_provider.dart';
 import 'cached_image.dart' as image_provider;
 
@@ -24,7 +25,7 @@ class CachedImageProvider
   @override
   Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents) async {
     if(url.startsWith("file://")) {
-      var file = File(url.substring(7));
+      var file = openFilePlatform(url.substring(7));
       return file.readAsBytes();
     }
     await for (var progress in ImageDownloader.loadThumbnail(url, sourceKey, cid)) {

lib/foundation/local.dart

@@ -71,12 +71,13 @@ class LocalComic with HistoryMixin implements Comic {
         downloadedChapters = List.from(jsonDecode(row[8] as String)),
         createdAt = DateTime.fromMillisecondsSinceEpoch(row[9] as int);
 
-  File get coverFile => File(FilePath.join(
+  File get coverFile => openFilePlatform(FilePath.join(
-        LocalManager().path,
+        baseDir,
-        directory,
         cover,
       ));
 
+  String get baseDir => directory.contains("/") ? directory : FilePath.join(LocalManager().path, directory);
+
   @override
   String get description => "";
 
@@ -341,12 +342,12 @@ class LocalManager with ChangeNotifier {
       throw "Invalid ep";
     }
     var comic = find(id, type) ?? (throw "Comic Not Found");
-    var directory = Directory(FilePath.join(path, comic.directory));
+    var directory = openDirectoryPlatform(comic.baseDir);
     if (comic.chapters != null) {
       var cid = ep is int
           ? comic.chapters!.keys.elementAt(ep - 1)
           : (ep as String);
-      directory = Directory(FilePath.join(directory.path, cid));
+      directory = openDirectoryPlatform(FilePath.join(directory.path, cid));
     }
     var files = <File>[];
     await for (var entity in directory.list()) {
@@ -392,10 +393,10 @@ class LocalManager with ChangeNotifier {
       String id, ComicType type, String name) async {
     var comic = find(id, type);
     if (comic != null) {
-      return Directory(FilePath.join(path, comic.directory));
+      return openDirectoryPlatform(FilePath.join(path, comic.directory));
     }
     var dir = findValidDirectoryName(path, name);
-    return Directory(FilePath.join(path, dir)).create().then((value) => value);
+    return openDirectoryPlatform(FilePath.join(path, dir)).create().then((value) => value);
   }
 
   void completeTask(DownloadTask task) {
@@ -454,7 +455,7 @@ class LocalManager with ChangeNotifier {
 
   void deleteComic(LocalComic c, [bool removeFileOnDisk = true]) {
     if(removeFileOnDisk) {
-      var dir = Directory(FilePath.join(path, c.directory));
+      var dir = openDirectoryPlatform(FilePath.join(path, c.directory));
       dir.deleteIgnoreError(recursive: true);
     }
     //Deleting a local comic means that it's nolonger available, thus both favorite and history should be deleted.

lib/init.dart

@@ -1,3 +1,4 @@
+import 'package:flutter_saf/flutter_saf.dart';
 import 'package:venera/foundation/app.dart';
 import 'package:venera/foundation/cache_manager.dart';
 import 'package:venera/foundation/comic_source/comic_source.dart';
@@ -12,6 +13,7 @@ import 'package:venera/utils/translations.dart';
 import 'foundation/appdata.dart';
 
 Future<void> init() async {
+  await SAFTaskWorker().init();
   await AppTranslation.init();
   await appdata.init();
   await App.init();

lib/pages/home_page.dart

@@ -1,4 +1,3 @@
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:sliver_tools/sliver_tools.dart';
 import 'package:venera/components/components.dart';
@@ -497,6 +496,10 @@ class _ImportComicsWidgetState extends State<_ImportComicsWidget> {
 
   String? selectedFolder;
 
+  bool copyToLocalFolder = true;
+
+  bool cancelled = false;
+
   @override
   void dispose() {
     loading = false;
@@ -546,6 +549,7 @@ class _ImportComicsWidgetState extends State<_ImportComicsWidget> {
                   },
                 );
               }),
+              if(type != 3)
                 ListTile(
                   title: Text("Add to favorites".tl),
                   trailing: Select(
@@ -559,6 +563,15 @@ class _ImportComicsWidgetState extends State<_ImportComicsWidget> {
                     },
                   ),
                 ).paddingHorizontal(8),
+              CheckboxListTile(
+                enabled: true,
+                title: Text("Copy to app local path".tl),
+                value: copyToLocalFolder,
+                onChanged:(v) {
+                  setState(() {
+                    copyToLocalFolder = !copyToLocalFolder;
+                  });
+                }).paddingHorizontal(8),
               const SizedBox(height: 8),
               Text(info).paddingHorizontal(24),
             ],
@@ -620,18 +633,20 @@ class _ImportComicsWidgetState extends State<_ImportComicsWidget> {
 
   void selectAndImport() async {
     height = key.currentContext!.size!.height;
+
     setState(() {
       loading = true;
     });
-    var importer = ImportComic(selectedFolder: selectedFolder);
+    var importer = ImportComic(
-    var result = false;
+        selectedFolder: selectedFolder,
-    if (type == 2) {
+        copyToLocal: copyToLocalFolder);
-      result = await importer.cbz();
+    var result = switch(type) {
-    } else if (type == 3) {
+      0 => await importer.directory(true),
-      result = await importer.ehViewer();
+      1 => await importer.directory(false),
-    } else {
+      2 => await importer.cbz(),
-      result = await importer.directory(type == 0);
+      3 => await importer.ehViewer(),
-    }
+      int() => true,
+    };
     if(result) {
       context.pop();
     } else {

lib/pages/reader/images.dart

@@ -604,7 +604,7 @@ ImageProvider _createImageProvider(int page, BuildContext context) {
   var reader = context.reader;
   var imageKey = reader.images![page - 1];
   if (imageKey.startsWith('file://')) {
-    return FileImage(File(imageKey.replaceFirst("file://", '')));
+    return FileImage(openFilePlatform(imageKey.replaceFirst("file://", '')));
   } else {
     return ReaderImageProvider(
       imageKey,

lib/pages/reader/scaffold.dart

@@ -469,7 +469,7 @@ class _ReaderScaffoldState extends State<_ReaderScaffold> {
               ImageProvider image;
               var imageKey = images[index];
               if (imageKey.startsWith('file://')) {
-                image = FileImage(File(imageKey.replaceFirst("file://", '')));
+                image = FileImage(openFilePlatform(imageKey.replaceFirst("file://", '')));
               } else {
                 image = ReaderImageProvider(
                   imageKey,
@@ -515,7 +515,7 @@ class _ReaderScaffoldState extends State<_ReaderScaffold> {
       }
     }
     if (imageKey.startsWith("file://")) {
-      return await File(imageKey.substring(7)).readAsBytes();
+      return await openFilePlatform(imageKey.substring(7)).readAsBytes();
     } else {
       return (await CacheManager().findCache(
               "$imageKey@${context.reader.type.sourceKey}@${context.reader.cid}@${context.reader.eid}"))!

lib/pages/settings/about.dart

@@ -86,6 +86,7 @@ Future<bool> checkUpdate() async {
 }
 
 Future<void> checkUpdateUi([bool showMessageIfNoUpdate = true]) async {
+  try {
     var value = await checkUpdate();
     if (value) {
       showDialog(
@@ -110,6 +111,9 @@ Future<void> checkUpdateUi([bool showMessageIfNoUpdate = true]) async {
     } else if (showMessageIfNoUpdate) {
       App.rootContext.showMessage(message: "No new version available".tl);
     }
+  } catch (e, s) {
+    Log.error("Check Update", e.toString(), s);
+  }
 }
 
 /// return true if version1 > version2

lib/pages/settings/local_favorites.dart

@@ -38,6 +38,16 @@ class _LocalFavoritesSettingsState extends State<LocalFavoritesSettings> {
             for (var e in LocalFavoritesManager().folderNames) e: e
           },
         ).toSliver(),
+        _CallbackSetting(
+          title: "Delete all unavailable local favorite items".tl,
+          callback: () async {
+            var controller = showLoadingDialog(context);
+            var count = await LocalFavoritesManager().removeInvalid();
+            controller.close();
+            context.showMessage(message: "Deleted @a favorite items".tlParams({'a': count}));
+          },
+          actionTitle: 'Delete'.tl,
+        ).toSliver(),
       ],
     );
   }

lib/utils/import_comic.dart

@@ -8,50 +8,40 @@ import 'package:venera/foundation/favorites.dart';
 import 'package:venera/foundation/local.dart';
 import 'package:venera/foundation/log.dart';
 import 'package:sqlite3/sqlite3.dart' as sql;
+import 'package:venera/utils/ext.dart';
 import 'package:venera/utils/translations.dart';
 import 'cbz.dart';
 import 'io.dart';
 
 class ImportComic {
   final String? selectedFolder;
+  final bool copyToLocal;
 
-  const ImportComic({this.selectedFolder});
+  const ImportComic({this.selectedFolder, this.copyToLocal = true});
 
   Future<bool> cbz() async {
     var file = await selectFile(ext: ['cbz']);
+    Map<String?, List<LocalComic>> imported = {};
     if(file == null) {
       return false;
     }
     var controller = showLoadingDialog(App.rootContext, allowCancel: false);
-    var isSuccessful = false;
     try {
       var comic = await CBZ.import(File(file.path));
-      if (selectedFolder != null) {
+      imported[selectedFolder] = [comic];
-        LocalFavoritesManager().addComic(
-          selectedFolder!,
-          FavoriteItem(
-            id: comic.id,
-            name: comic.title,
-            coverPath: comic.cover,
-            author: comic.subtitle,
-            type: comic.comicType,
-            tags: comic.tags,
-          ),
-        );
-      }
-      isSuccessful = true;
     } catch (e, s) {
       Log.error("Import Comic", e.toString(), s);
       App.rootContext.showMessage(message: e.toString());
     }
     controller.close();
-    return isSuccessful;
+    return registerComics(imported, true);
   }
 
   Future<bool> ehViewer() async {
     var dbFile = await selectFile(ext: ['db']);
     final picker = DirectoryPicker();
     final comicSrc = await picker.pickDirectory();
+    Map<String?, List<LocalComic>> imported = {};
     if (dbFile == null || comicSrc == null) {
       return false;
     }
@@ -60,43 +50,27 @@ class ImportComic {
     var controller = showLoadingDialog(App.rootContext, onCancel: () {
       cancelled = true;
     });
-    bool isSuccessful = false;
 
     try {
-      var cache = FilePath.join(App.cachePath, dbFile.name);
+      var db = sql.sqlite3.open(dbFile.path);
-      await dbFile.saveTo(cache);
-      var db = sql.sqlite3.open(cache);
 
-      Future<void> addTagComics(String destFolder, List<sql.Row> comics) async {
+      Future<List<LocalComic>> validateComics(List<sql.Row> comics) async {
+        List<LocalComic> imported = [];
         for (var comic in comics) {
           if (cancelled) {
-            return;
+            return imported;
           }
-          var comicDir = Directory(
+          var comicDir = openDirectoryPlatform(
               FilePath.join(comicSrc.path, comic['DIRNAME'] as String));
-          if (!(await comicDir.exists())) {
-            continue;
-          }
           String titleJP =
           comic['TITLE_JPN'] == null ? "" : comic['TITLE_JPN'] as String;
           String title = titleJP == "" ? comic['TITLE'] as String : titleJP;
-          if (LocalManager().findByName(title) != null) {
+          int timeStamp = comic['TIME'] as int;
-            Log.info("Import Comic", "Comic already exists: $title");
+          DateTime downloadTime = timeStamp != 0
-            continue;
+              ? DateTime.fromMillisecondsSinceEpoch(timeStamp)
-          }
-
-          String coverURL = await comicDir.joinFile(".thumb").exists()
-              ? comicDir.joinFile(".thumb").path
-              : (comic['THUMB'] as String)
-                  .replaceAll('s.exhentai.org', 'ehgt.org');
-          int downloadedTimeStamp = comic['TIME'] as int;
-          DateTime downloadedTime = downloadedTimeStamp != 0
-              ? DateTime.fromMillisecondsSinceEpoch(downloadedTimeStamp)
               : DateTime.now();
-          var comicObj = LocalComic(
+          var comicObj = await _checkSingleComic(comicDir,
-            id: LocalManager().findValidId(ComicType.local),
               title: title,
-            subtitle: '',
               tags: [
                 //1 >> x
                 [
@@ -112,77 +86,55 @@ class ImportComic {
                   "WESTERN",
                 ][(log(comic['CATEGORY'] as int) / ln2).floor()]
               ],
-            directory: comicDir.path,
+              createTime: downloadTime);
-            chapters: null,
+          if (comicObj == null) {
-            cover: coverURL,
+            continue;
-            comicType: ComicType.local,
-            downloadedChapters: [],
-            createdAt: downloadedTime,
-          );
-          LocalManager().add(comicObj, comicObj.id);
-          LocalFavoritesManager().addComic(
-            destFolder,
-            FavoriteItem(
-              id: comicObj.id,
-              name: comicObj.title,
-              coverPath: comicObj.cover,
-              author: comicObj.subtitle,
-              type: comicObj.comicType,
-              tags: comicObj.tags,
-              favoriteTime: downloadedTime,
-            ),
-          );
           }
+          imported.add(comicObj);
+        }
+        return imported;
       }
 
-      {
+      var tags = <String>[""];
-        var defaultFolderName = '(EhViewer)Default';
+      tags.addAll(db.select("""
-        if (!LocalFavoritesManager().existsFolder(defaultFolderName)) {
+            SELECT * FROM DOWNLOAD_LABELS LB
-          LocalFavoritesManager().createFolder(defaultFolderName);
+            ORDER BY  LB.TIME DESC;
-        }
+          """).map((r) => r['LABEL'] as String).toList());
-        var comicList = db.select("""
-              SELECT * 
-              FROM DOWNLOAD_DIRNAME DN
-              LEFT JOIN DOWNLOADS DL
-              ON DL.GID = DN.GID
-              WHERE DL.LABEL IS NULL AND DL.STATE = 3
-              ORDER BY DL.TIME DESC
-            """).toList();
-        await addTagComics(defaultFolderName, comicList);
-      }
 
-      var folders = db.select("""
+      for (var tag in tags) {
-            SELECT * FROM DOWNLOAD_LABELS;
-          """);
-
-      for (var folder in folders) {
         if (cancelled) {
           break;
         }
-        var label = folder["LABEL"] as String;
+        var folderName =
-        var folderName = '(EhViewer)$label';
+        tag == '' ? '(EhViewer)Default'.tl : '(EhViewer)$tag';
-        if (!LocalFavoritesManager().existsFolder(folderName)) {
-          LocalFavoritesManager().createFolder(folderName);
-        }
         var comicList = db.select("""
               SELECT * 
               FROM DOWNLOAD_DIRNAME DN
               LEFT JOIN DOWNLOADS DL
               ON DL.GID = DN.GID
-              WHERE DL.LABEL = ? AND DL.STATE = 3
+              WHERE DL.LABEL ${tag == '' ? 'IS NULL' : '= \'$tag\''} AND DL.STATE = 3
               ORDER BY DL.TIME DESC
-            """, [label]).toList();
+            """).toList();
-        await addTagComics(folderName, comicList);
+
+        var validComics = await validateComics(comicList);
+        imported[folderName] = validComics;
+        if (validComics.isNotEmpty &&
+            !LocalFavoritesManager().existsFolder(folderName)) {
+          LocalFavoritesManager().createFolder(folderName);
+        }
       }
       db.dispose();
+
+      //Android specific
+      var cache = FilePath.join(App.cachePath, dbFile.name);
       await File(cache).deleteIgnoreError();
-      isSuccessful = true;
     } catch (e, s) {
       Log.error("Import Comic", e.toString(), s);
       App.rootContext.showMessage(message: e.toString());
     }
     controller.close();
-    return isSuccessful;
+    if(cancelled) return false;
+    return registerComics(imported, copyToLocal);
   }
 
   Future<bool> directory(bool single) async {
@@ -191,11 +143,12 @@ class ImportComic {
     if (path == null) {
       return false;
     }
-    Map<Directory, LocalComic> comics = {};
+    Map<String?, List<LocalComic>> imported = {selectedFolder: []};
+    try {
       if (single) {
         var result = await _checkSingleComic(path);
         if (result != null) {
-        comics[path] = result;
+          imported[selectedFolder]!.add(result);
         } else {
           App.rootContext.showMessage(message: "Invalid Comic".tl);
           return false;
@@ -205,57 +158,28 @@ class ImportComic {
           if (entry is Directory) {
             var result = await _checkSingleComic(entry);
             if (result != null) {
-            comics[entry] = result;
+              imported[selectedFolder]!.add(result);
             }
           }
         }
       }
-    bool shouldCopy = true;
+    } catch (e, s) {
-    for (var comic in comics.keys) {
+      Log.error("Import Comic", e.toString(), s);
-      if (comic.parent.path == LocalManager().path) {
+      App.rootContext.showMessage(message: e.toString());
-        shouldCopy = false;
-        break;
     }
-    }
+    return registerComics(imported, copyToLocal);
-    if (shouldCopy && comics.isNotEmpty) {
-      try {
-        // copy the comics to the local directory
-        await compute<Map<String, dynamic>, void>(_copyDirectories, {
-          'toBeCopied': comics.keys.map((e) => e.path).toList(),
-          'destination': LocalManager().path,
-        });
-      } catch (e) {
-        App.rootContext.showMessage(message: "Failed to import comics".tl);
-        Log.error("Import Comic", e.toString());
-        return false;
-      }
-    }
-    for (var comic in comics.values) {
-      LocalManager().add(comic, LocalManager().findValidId(ComicType.local));
-      if (selectedFolder != null) {
-        LocalFavoritesManager().addComic(
-          selectedFolder!,
-          FavoriteItem(
-            id: comic.id,
-            name: comic.title,
-            coverPath: comic.cover,
-            author: comic.subtitle,
-            type: comic.comicType,
-            tags: comic.tags,
-          ),
-        );
-      }
-    }
-    App.rootContext.showMessage(
-        message: "Imported @a comics".tlParams({
-      'a': comics.length,
-    }));
-    return true;
   }
 
-  Future<LocalComic?> _checkSingleComic(Directory directory) async {
+  //Automatically search for cover image and chapters
+  Future<LocalComic?> _checkSingleComic(Directory directory,
+      {String? id,
+        String? title,
+        String? subtitle,
+        List<String>? tags,
+        DateTime? createTime})
+  async {
     if (!(await directory.exists())) return null;
-    var name = directory.name;
+    var name = title ?? directory.name;
     if (LocalManager().findByName(name) != null) {
       Log.info("Import Comic", "Comic already exists: $name");
       return null;
@@ -263,7 +187,8 @@ class ImportComic {
     bool hasChapters = false;
     var chapters = <String>[];
     var coverPath = ''; // relative path to the cover image
-    for (var entry in directory.listSync()) {
+    var fileList = <String>[];
+    await for (var entry in directory.list()) {
       if (entry is Directory) {
         hasChapters = true;
         chapters.add(entry.name);
@@ -275,20 +200,24 @@ class ImportComic {
           }
         }
       } else if (entry is File) {
-        if (entry.name.startsWith('cover')) {
-          coverPath = entry.name;
-        }
         const imageExtensions = ['jpg', 'jpeg', 'png', 'webp', 'gif', 'jpe'];
-        if (!coverPath.startsWith('cover') &&
+        if (imageExtensions.contains(entry.extension)) {
-            imageExtensions.contains(entry.extension)) {
+          fileList.add(entry.name);
-          coverPath = entry.name;
         }
       }
     }
+
+    if(fileList.isEmpty) {
+      return null;
+    }
+
+    fileList.sort();
+    coverPath = fileList.firstWhereOrNull((l) => l.startsWith('cover')) ?? fileList.first;
+
     chapters.sort();
     if (hasChapters && coverPath == '') {
       // use the first image in the first chapter as the cover
-      var firstChapter = Directory('${directory.path}/${chapters.first}');
+      var firstChapter = openDirectoryPlatform('${directory.path}/${chapters.first}');
       await for (var entry in firstChapter.list()) {
         if (entry is File) {
           coverPath = entry.name;
@@ -301,25 +230,26 @@ class ImportComic {
       return null;
     }
     return LocalComic(
-      id: '0',
+      id: id ?? '0',
       title: name,
-      subtitle: '',
+      subtitle: subtitle ?? '',
-      tags: [],
+      tags: tags ?? [],
-      directory: directory.name,
+      directory: directory.path,
       chapters: hasChapters ? Map.fromIterables(chapters, chapters) : null,
       cover: coverPath,
       comicType: ComicType.local,
       downloadedChapters: chapters,
-      createdAt: DateTime.now(),
+      createdAt: createTime ?? DateTime.now(),
     );
   }
 
-  static Future<void> _copyDirectories(Map<String, dynamic> data) async {
+  static Future<Map<String, String>> _copyDirectories(Map<String, dynamic> data) async {
     var toBeCopied = data['toBeCopied'] as List<String>;
     var destination = data['destination'] as String;
+    Map<String, String> result = {};
     for (var dir in toBeCopied) {
-      var source = Directory(dir);
+      var source = openDirectoryPlatform(dir);
-      var dest = Directory("$destination/${source.name}");
+      var dest = openDirectoryPlatform("$destination/${source.name}");
       if (dest.existsSync()) {
         // The destination directory already exists, and it is not managed by the app.
         // Rename the old directory to avoid conflicts.
@@ -330,6 +260,95 @@ class ImportComic {
       }
       dest.createSync();
       await copyDirectory(source, dest);
+      result[source.path] = dest.path;
+    }
+    return result;
+  }
+
+  Future<Map<String?, List<LocalComic>>> _copyComicsToLocalDir(
+      Map<String?, List<LocalComic>> comics) async {
+    var destPath = LocalManager().path;
+    Map<String?, List<LocalComic>> result = {};
+    for (var favoriteFolder in comics.keys) {
+      result[favoriteFolder] = comics[favoriteFolder]!
+          .where((c) => c.directory.startsWith(destPath))
+          .toList();
+      comics[favoriteFolder]!
+          .removeWhere((c) => c.directory.startsWith(destPath));
+
+      if (comics[favoriteFolder]!.isEmpty) {
+        continue;
+      }
+
+      try {
+        // copy the comics to the local directory
+        var pathMap = await compute<Map<String, dynamic>, Map<String, String>>(
+            _copyDirectories, {
+          'toBeCopied': comics[favoriteFolder]!.map((e) => e.directory).toList(),
+          'destination': destPath,
+        });
+        //Construct a new object since LocalComic.directory is a final String
+        for (var c in comics[favoriteFolder]!) {
+          result[favoriteFolder]!.add(
+              LocalComic(
+                  id: c.id,
+                  title: c.title,
+                  subtitle: c.subtitle,
+                  tags: c.tags,
+                  directory: pathMap[c.directory]!,
+                  chapters: c.chapters,
+                  cover: c.cover,
+                  comicType: c.comicType,
+                  downloadedChapters: c.downloadedChapters,
+                  createdAt: c.createdAt
+              )
+          );
+        }
+      } catch (e) {
+        App.rootContext.showMessage(message: "Failed to copy comics".tl);
+        Log.error("Import Comic", e.toString());
+        return result;
+      }
+    }
+    return result;
+  }
+
+  Future<bool> registerComics(Map<String?, List<LocalComic>> importedComics, bool copy) async {
+    try {
+      if (copy) {
+        importedComics = await _copyComicsToLocalDir(importedComics);
+      }
+      int importedCount = 0;
+      for (var folder in importedComics.keys) {
+        for (var comic in importedComics[folder]!) {
+          var id = LocalManager().findValidId(ComicType.local);
+          LocalManager().add(comic, id);
+          importedCount++;
+          if (folder != null) {
+            LocalFavoritesManager().addComic(
+                folder,
+                FavoriteItem(
+                  id: id,
+                  name: comic.title,
+                  coverPath: comic.cover,
+                  author: comic.subtitle,
+                  type: comic.comicType,
+                  tags: comic.tags,
+                  favoriteTime: comic.createdAt
+                )
+            );
           }
         }
       }
+      App.rootContext.showMessage(
+          message: "Imported @a comics".tlParams({
+            'a': importedCount,
+          }));
+    } catch(e) {
+      App.rootContext.showMessage(message: "Failed to register comics".tl);
+      Log.error("Import Comic", e.toString());
+      return false;
+    }
+    return true;
+  }
+}

lib/utils/io.dart

@@ -4,6 +4,7 @@ import 'dart:isolate';
 
 import 'package:flutter/services.dart';
 import 'package:flutter_file_dialog/flutter_file_dialog.dart';
+import 'package:flutter_saf/flutter_saf.dart';
 import 'package:venera/foundation/app.dart';
 import 'package:venera/utils/ext.dart';
 import 'package:path/path.dart' as p;
@@ -80,7 +81,7 @@ extension DirectoryExtension on Directory {
     int total = 0;
     for (var f in listSync(recursive: true)) {
       if (FileSystemEntity.typeSync(f.path) == FileSystemEntityType.file) {
-        total += await File(f.path).length();
+        total += await openFilePlatform(f.path).length();
       }
     }
     return total;
@@ -92,7 +93,7 @@ extension DirectoryExtension on Directory {
   }
 
   File joinFile(String name) {
-    return File(FilePath.join(path, name));
+    return openFilePlatform(FilePath.join(path, name));
   }
 }
 
@@ -130,7 +131,7 @@ Future<void> copyDirectory(Directory source, Directory destination) async {
     if (content is File) {
       content.copySync(newPath);
     } else if (content is Directory) {
-      Directory newDirectory = Directory(newPath);
+      Directory newDirectory = openDirectoryPlatform(newPath);
       newDirectory.createSync();
       copyDirectory(content.absolute, newDirectory.absolute);
     }
@@ -146,11 +147,11 @@ Future<void> copyDirectoryIsolate(
 
 String findValidDirectoryName(String path, String directory) {
   var name = sanitizeFileName(directory);
-  var dir = Directory("$path/$name");
+  var dir = openDirectoryPlatform("$path/$name");
   var i = 1;
   while (dir.existsSync() && dir.listSync().isNotEmpty) {
     name = sanitizeFileName("$directory($i)");
-    dir = Directory("$path/$name");
+    dir = openDirectoryPlatform("$path/$name");
     i++;
   }
   return name;
@@ -180,14 +181,14 @@ class DirectoryPicker {
       if (App.isWindows || App.isLinux) {
         directory = await file_selector.getDirectoryPath();
       } else if (App.isAndroid) {
-        directory = await _methodChannel.invokeMethod<String?>("getDirectoryPath");
+        directory = (await AndroidDirectory.pickDirectory())?.path;
       } else {
         // ios, macos
         directory = await _methodChannel.invokeMethod<String?>("getDirectoryPath");
       }
       if (directory == null) return null;
       _finalizer.attach(this, directory);
-      return Directory(directory);
+      return openDirectoryPlatform(directory);
     } finally {
       Future.delayed(const Duration(milliseconds: 100), () {
         IO._isSelectingFiles = false;
@@ -310,6 +311,30 @@ Future<void> saveFile(
   }
 }
 
+Directory openDirectoryPlatform(String path) {
+  if(App.isAndroid) {
+    var dir = AndroidDirectory.fromPathSync(path);
+    if(dir == null) {
+      return Directory(path);
+    }
+    return dir;
+  } else {
+    return Directory(path);
+  }
+}
+
+File openFilePlatform(String path) {
+  if(App.isAndroid) {
+    var f = AndroidFile.fromPathSync(path);
+    if(f == null) {
+      return File(path);
+    }
+    return f;
+  } else {
+    return File(path);
+  }
+}
+
 class Share {
   static void shareFile({
     required Uint8List data,

pubspec.lock

@@ -389,6 +389,15 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.5.1"
+  flutter_saf:
+    dependency: "direct main"
+    description:
+      path: "."
+      ref: HEAD
+      resolved-ref: "51a27e2ca0e05becfb8ee3a506294dc4460721a8"
+      url: "https://github.com/pkuislm/flutter_saf.git"
+    source: git
+    version: "0.0.1"
   flutter_test:
     dependency: "direct dev"
     description: flutter

pubspec.yaml

@@ -65,6 +65,10 @@ dependencies:
       ref: 285f87f15bccd2d5d5ff443761348c6ee47b98d1
   battery_plus: ^6.2.0
   local_auth: ^2.3.0
+  flutter_saf:
+    git: 
+      url: https://github.com/pkuislm/flutter_saf.git
+      ref: 829a566b738a26ea98e523807f49838e21308543
 
 dev_dependencies:
   flutter_test: