在下载文件之前,如何检查 ApplicationDocumentsDirectory 中文件和目录的存在?
import 'dart:io';
import 'package:path_provider/path_provider.dart';
String fileName = "file.jpg";
String dir = (await getApplicationDocumentsDirectory()).path;
String savePath = '$dir/$fileName';
//for directories: await Directory(savePath).exists();
if (await File(savePath).exists()) {
print("File exists");
} else {
print("File doesn't exist");
}