refactor: Better download UX with file picker for android and iOS

lib/utils/matrix_sdk_extensions/matrix_file_extension.dart

@@ -3,10 +3,10 @@ import 'dart:io';
 import 'package:flutter/material.dart';
 
 import 'package:file_picker/file_picker.dart';
+import 'package:flutter_file_dialog/flutter_file_dialog.dart';
 import 'package:flutter_gen/gen_l10n/l10n.dart';
 import 'package:future_loading_dialog/future_loading_dialog.dart';
 import 'package:matrix/matrix.dart';
-import 'package:path_provider/path_provider.dart';
 import 'package:share_plus/share_plus.dart';
 import 'package:universal_html/html.dart' as html;
 
@@ -15,8 +15,8 @@ import 'package:fluffychat/utils/size_string.dart';
 
 extension MatrixFileExtension on MatrixFile {
   void save(BuildContext context) async {
-    if (PlatformInfos.isIOS) {
-      return share(context);
+    if (PlatformInfos.isIOS || PlatformInfos.isAndroid) {
+      _mobileDownload(context);
     }
 
     if (PlatformInfos.isWeb) {
@@ -24,13 +24,11 @@ extension MatrixFileExtension on MatrixFile {
       return;
     }
 
-    final downloadPath = PlatformInfos.isAndroid
-        ? await getDownloadPathAndroid()
-        : await FilePicker.platform.saveFile(
-            dialogTitle: L10n.of(context)!.saveFile,
-            fileName: name,
-            type: filePickerFileType,
-          );
+    final downloadPath = await FilePicker.platform.saveFile(
+      dialogTitle: L10n.of(context)!.saveFile,
+      fileName: name,
+      type: filePickerFileType,
+    );
     if (downloadPath == null) return;
 
     final result = await showFutureLoadingDialog(
@@ -48,24 +46,6 @@ extension MatrixFileExtension on MatrixFile {
     );
   }
 
-  Future<String> getDownloadPathAndroid() async {
-    final directory = await getDownloadDirectoryAndroid();
-    var counter = 1;
-    var path = '${directory.path}/$name';
-    while (await File(path).exists()) {
-      path = '${directory.path}/(${counter++})$name';
-    }
-    return path;
-  }
-
-  Future<Directory> getDownloadDirectoryAndroid() async {
-    final defaultDownloadDirectory = Directory('/storage/emulated/0/Download');
-    if (await defaultDownloadDirectory.exists()) {
-      return defaultDownloadDirectory;
-    }
-    return await getApplicationDocumentsDirectory();
-  }
-
   FileType get filePickerFileType {
     if (this is MatrixImageFile) return FileType.image;
     if (this is MatrixAudioFile) return FileType.audio;
@@ -73,6 +53,25 @@ extension MatrixFileExtension on MatrixFile {
     return FileType.any;
   }
 
+  void _mobileDownload(BuildContext context) async {
+    final downloadPath = await FlutterFileDialog.saveFile(
+      params: SaveFileDialogParams(
+        fileName: name,
+        data: bytes,
+      ),
+    );
+    if (downloadPath != null) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text(
+            L10n.of(context)!.fileHasBeenSavedAt(downloadPath),
+          ),
+        ),
+      );
+    }
+    return;
+  }
+
   void _webDownload() {
     html.AnchorElement(
       href: html.Url.createObjectUrlFromBlob(

pubspec.lock

@@ -427,6 +427,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_file_dialog:
+    dependency: "direct main"
+    description:
+      name: flutter_file_dialog
+      sha256: "9344b8f07be6a1b6f9854b723fb0cf84a8094ba94761af1d213589d3cb087488"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
   flutter_foreground_task:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -32,6 +32,7 @@ dependencies:
   flutter_app_badger: ^1.5.0
   flutter_blurhash: ^0.8.2
   flutter_cache_manager: ^3.3.0
+  flutter_file_dialog: ^3.0.2
   flutter_foreground_task: ^6.0.0+1
   flutter_highlighter: ^0.1.1
   flutter_html: ^3.0.0-beta.2