Use SAF for Android

lib/main.dart

@@ -1,5 +1,6 @@
 import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
+import 'package:saf/saf.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:sheetless/sheetview.dart';
 
@@ -33,6 +34,11 @@ class MyHomePage extends StatefulWidget {
 }
 
 class _MyHomePageState extends State<MyHomePage> {
+  @override
+  void initState() {
+    super.initState();
+  }
+
   Future<String?> getSavedSheetsPath() async {
     final prefs = await SharedPreferences.getInstance();
     return prefs.getString("sheets-path");
@@ -62,9 +68,31 @@ class _MyHomePageState extends State<MyHomePage> {
     return "No path selected";
   }
 
+  Future<String?> getSafPickedSheetsDirectory() async {
+    var pickedDirectories = await Saf.getPersistedPermissionDirectories();
+    if (pickedDirectories == null || pickedDirectories.isEmpty) {
+      return null;
+    }
+    return pickedDirectories.last;
+  }
+
   Future<List<Sheet>> acquireSheets() async {
-    var sheetsPath = await findAndSaveSheetsPath();
-    return loadSheetsSorted(sheetsPath);
+    String? sheetsDirectory = await getSafPickedSheetsDirectory();
+    if (sheetsDirectory == null || sheetsDirectory.isEmpty) {
+      Saf.getDynamicDirectoryPermission(grantWritePermission: false);
+      sheetsDirectory = await getSafPickedSheetsDirectory();
+      if (sheetsDirectory == null || sheetsDirectory.isEmpty) {
+        throw Exception("No Directory selected");
+      }
+    }
+
+    var sheetsDirectoryFiles = await Saf.getFilesPathFor(sheetsDirectory);
+    if (sheetsDirectoryFiles == null) {
+      Saf.releasePersistedPermissionFor(sheetsDirectory);
+      throw Exception(
+          "Permissions for directory no longer valid or Directory deleted. Please restart app.");
+    }
+    return loadSheetsSorted(sheetsDirectoryFiles);
   }
 
   @override

lib/sheet.dart

@@ -11,27 +11,34 @@ class Sheet {
   Sheet(this.author, this.name, this.path);
 }
 
-Future<List<Sheet>> loadSheetsSorted(String path) async {
-  var sheets = await _loadSheets(path);
+Future<List<Sheet>> loadSheetsSorted(List<String> sheetsDirectoryFiles) async {
+  var sheets = await _loadSheets(sheetsDirectoryFiles);
   sheets.sort((left, right) => left.name.compareTo(right.name));
   return sheets;
 }
 
-Future<List<Sheet>> _loadSheets(String path) async {
-  var dir = Directory(path);
-  if (!dir.existsSync()) {
-    throw Exception("Specified path '$path' does not exist");
-  }
+Future<List<Sheet>> _loadSheets(List<String> sheetsDirectoryFiles) async {
   final List<Sheet> sheets = List.empty(growable: true);
-  await for (final FileSystemEntity x in dir.list()) {
-    if (x is Directory) {
-      var authorName = p.basename(x.path);
-      await for (final FileSystemEntity a in x.list()) {
-        if (a is File) {
-          var sheetName = p.basenameWithoutExtension(a.path);
-          sheetName = sheetName.capitalize();
-          sheets.add(Sheet(authorName, sheetName, a.path));
+  var authorDirectories = sheetsDirectoryFiles
+      .map((e) => Directory(e))
+      .where((element) => element.existsSync());
+
+  for (Directory authorDirectory in authorDirectories) {
+    var authorName = p.basename(authorDirectory.path);
+    // Ignore hidden directories
+    if (authorName.startsWith(".")) {
+      continue;
     }
+
+    await for (final FileSystemEntity sheetFile in authorDirectory.list()) {
+      if (sheetFile is File) {
+        var sheetName = p.basenameWithoutExtension(sheetFile.path);
+        // Ignore hidden files
+        if (sheetName.startsWith(".")) {
+          continue;
+        }
+        sheetName = sheetName.capitalize();
+        sheets.add(Sheet(authorName, sheetName, sheetFile.path));
       }
     }
   }

pubspec.lock

@@ -256,6 +256,46 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.3.0"
+  permission_handler:
+    dependency: transitive
+    description:
+      name: permission_handler
+      sha256: "33c6a1253d1f95fd06fa74b65b7ba907ae9811f9d5c1d3150e51417d04b8d6a8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.2.0"
+  permission_handler_android:
+    dependency: transitive
+    description:
+      name: permission_handler_android
+      sha256: "8028362b40c4a45298f1cbfccd227c8dd6caf0e27088a69f2ba2ab15464159e2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.2.0"
+  permission_handler_apple:
+    dependency: transitive
+    description:
+      name: permission_handler_apple
+      sha256: "9c370ef6a18b1c4b2f7f35944d644a56aa23576f23abee654cf73968de93f163"
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.0.7"
+  permission_handler_platform_interface:
+    dependency: transitive
+    description:
+      name: permission_handler_platform_interface
+      sha256: "68abbc472002b5e6dfce47fe9898c6b7d8328d58b5d2524f75e277c07a97eb84"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.9.0"
+  permission_handler_windows:
+    dependency: transitive
+    description:
+      name: permission_handler_windows
+      sha256: f67cab14b4328574938ecea2db3475dad7af7ead6afab6338772c5f88963e38b
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.2"
   photo_view:
     dependency: transitive
     description:
@@ -288,6 +328,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.2.4"
+  saf:
+    dependency: "direct main"
+    description:
+      name: saf
+      sha256: "3b7565638bc155801dc2b1b948ee0545f8cf9310da6e0f4ded45f62ee83f1321"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.3+4"
   shared_preferences:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -40,6 +40,7 @@ dependencies:
   pdfx: ^2.3.0
   file_picker: ^5.2.5
   shared_preferences: ^2.0.17
+  saf: ^1.0.3+4
 
 dev_dependencies:
   flutter_test:

windows/flutter/generated_plugin_registrant.cc

@@ -7,8 +7,11 @@
 #include "generated_plugin_registrant.h"
 
 #include <pdfx/pdfx_plugin.h>
+#include <permission_handler_windows/permission_handler_windows_plugin.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
   PdfxPluginRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("PdfxPlugin"));
+  PermissionHandlerWindowsPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("PermissionHandlerWindowsPlugin"));
 }

windows/flutter/generated_plugins.cmake

@@ -4,6 +4,7 @@
 
 list(APPEND FLUTTER_PLUGIN_LIST
   pdfx
+  permission_handler_windows
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST