fix: Handle selecting files and folders for patch options correctly (#2144)

lib/services/manager_api.dart

@@ -38,6 +38,8 @@ class ManagerAPI {
   bool releaseBuild = false;
   bool suggestedAppVersionSelected = true;
   bool isDynamicThemeAvailable = false;
+  bool isScopedStorageAvailable = false;
+  int sdkVersion = 0;
   String storedPatchesFile = '/selected-patches.json';
   String keystoreFile =
       '/sdcard/Android/data/app.revanced.manager.flutter/files/revanced-manager.keystore';
@@ -55,8 +57,11 @@ class ManagerAPI {
   Future<void> initialize() async {
     _prefs = await SharedPreferences.getInstance();
     isRooted = await _rootAPI.isRooted();
-    isDynamicThemeAvailable =
+    if (sdkVersion == 0) {
-        (await getSdkVersion()) >= 31; // ANDROID_12_SDK_VERSION = 31
+      sdkVersion = await getSdkVersion();
+    }
+    isDynamicThemeAvailable = sdkVersion >= 31; // ANDROID_12_SDK_VERSION = 31
+    isScopedStorageAvailable = sdkVersion >= 30; // ANDROID_11_SDK_VERSION = 30
     storedPatchesFile =
         (await getApplicationDocumentsDirectory()).path + storedPatchesFile;
     if (kReleaseMode) {

lib/ui/widgets/patchesSelectorView/patch_options_fields.dart

@@ -1,8 +1,11 @@
+import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:flutter_file_dialog/flutter_file_dialog.dart';
+import 'package:permission_handler/permission_handler.dart';
+import 'package:revanced_manager/app/app.locator.dart';
 import 'package:revanced_manager/gen/strings.g.dart';
 import 'package:revanced_manager/models/patch.dart';
+import 'package:revanced_manager/services/manager_api.dart';
 import 'package:revanced_manager/ui/views/patch_options/patch_options_viewmodel.dart';
 import 'package:revanced_manager/ui/widgets/shared/custom_card.dart';
 
@@ -398,6 +401,7 @@ class TextFieldForPatchOption extends StatefulWidget {
 }
 
 class _TextFieldForPatchOptionState extends State<TextFieldForPatchOption> {
+  final ManagerAPI _managerAPI = locator<ManagerAPI>();
   final TextEditingController controller = TextEditingController();
   String? selectedKey;
   String? defaultValue;
@@ -524,21 +528,42 @@ class _TextFieldForPatchOptionState extends State<TextFieldForPatchOption> {
                   ];
                 },
                 onSelected: (String selection) async {
+                  Future<bool> gotExternalStoragePermission() async {
+                    // manageExternalStorage permission is required for folder selection
+                    // otherwise, the app will not complain, but the patches will error out
+                    // the same way as if the user selected an empty folder.
+                    // Android 11 and above requires the manageExternalStorage permission
+                    if (_managerAPI.isScopedStorageAvailable) {
+                      final permission =
+                          await Permission.manageExternalStorage.request();
+                      return permission.isGranted;
+                    }
+                    return true;
+                  }
+
                   switch (selection) {
                     case 'file':
-                      final String? result = await FlutterFileDialog.pickFile();
+                      // here scope storage is not required because file_picker
-                      if (result != null) {
+                      // will copy the file to the app's cache
-                        controller.text = result;
+                      final FilePickerResult? result =
-                        widget.onChanged(controller.text);
+                          await FilePicker.platform.pickFiles();
+                      if (result == null) {
+                        return;
                       }
+                      controller.text = result.files.single.path!;
+                      widget.onChanged(controller.text);
                       break;
                     case 'folder':
-                      final DirectoryLocation? result =
+                      if (!await gotExternalStoragePermission()) {
-                          await FlutterFileDialog.pickDirectory();
+                        return;
-                      if (result != null) {
-                        controller.text = result.toString();
-                        widget.onChanged(controller.text);
                       }
+                      final String? result =
+                          await FilePicker.platform.getDirectoryPath();
+                      if (result == null) {
+                        return;
+                      }
+                      controller.text = result;
+                      widget.onChanged(controller.text);
                       break;
                     case 'remove':
                       widget.removeValue!();

pubspec.yaml

@@ -23,6 +23,7 @@ dependencies:
   dynamic_color: ^1.7.0
   dynamic_themes: ^1.1.0
   expandable: ^5.0.1
+  file_picker: ^8.0.5
   flutter:
     sdk: flutter
   flutter_background: