Flutter文件操作 #

dependencies:
  path_provider: ^2.1.1

import 'package:path_provider/path_provider.dart';

final appDir = await getApplicationDocumentsDirectory();
final cacheDir = await getTemporaryDirectory();
final externalDir = await getExternalStorageDirectory();

import 'dart:io';

final file = File('${appDir.path}/data.txt');
await file.writeAsString('Hello, Flutter!');

final content = await file.readAsString();
print(content);

final exists = await file.exists();

await file.delete();