如何在Flutter中从内部和外部存储中获取所有mp3文件？

dependencies:
  path_provider: ^2.0.2
  flutter_file_manager: ^1.0.1

import 'package:path_provider/path_provider.dart';

Future<String> getInternalStoragePath() async {
  final directory = await getApplicationDocumentsDirectory();
  return directory.path;
}

import 'package:path_provider/path_provider.dart';

Future<List<String>> getExternalStoragePaths() async {
  final directories = await getExternalStorageDirectories();
  List<String> paths = [];
  directories?.forEach((directory) {
    paths.add(directory.path);
  });
  return paths;
}

import 'package:flutter_file_manager/flutter_file_manager.dart';

Future<List<String>> getAllMp3Files(String path) async {
  List<File> files = await FileManager.listFiles(
    path: path,
    extensions: ['mp3'],
    recursive: true,
  );
  List<String> mp3Files = [];
  files.forEach((file) {
    mp3Files.add(file.path);
  });
  return mp3Files;
}

String internalStoragePath = await getInternalStoragePath();
List<String> externalStoragePaths = await getExternalStoragePaths();

List<String> allMp3Files = [];
allMp3Files.addAll(await getAllMp3Files(internalStoragePath));
externalStoragePaths.forEach((path) async {
  allMp3Files.addAll(await getAllMp3Files(path));
});

// 打印所有mp3文件路径
allMp3Files.forEach((filePath) {
  print(filePath);
});