在 flutter 中重命名 file/Image

Question

我正在使用 image_picker 从 gallery/taking 一张照片中挑选一张图片：^0.6.2+3 包。

File picture = await ImagePicker.pickImage(
  maxWidth: 800,
  imageQuality: 10,
  source: source, // source can be either ImageSource.camera or ImageSource.gallery
  maxHeight: 800,
);

我得到 picture.path 作为

/Users/[一些路径]/tmp/image_picker_A0EBD0C1-EF3B-417F-9F8A-5DFBA889118C-18492-00001AD95CF914D3.jpg

现在我想把图片重命名为case01wd03id01.jpg

Note : I don't want to move it to new folder

如何重命名？我在官方文档中找不到它。

Answer 1

先导入路径包

import 'package:path/path.dart' as path;

然后创建一个新的目标路径来重命名文件。

File picture = await ImagePicker.pickImage(
        maxWidth: 800,
        imageQuality: 10,
        source: ImageSource.camera,
        maxHeight: 800,
);
print('Original path: ${picture.path}');
String dir = path.dirname(picture.path);
String newPath = path.join(dir, 'case01wd03id01.jpg');
print('NewPath: ${newPath}');
picture.renameSync(newPath);

Answer 2

isn't working for me since image_picker: ^0.6.7，他们最近在获取 returns PickedFile 而不是 File.

的图像或视频时更改了 API

我使用的新方法是将 PickedFile 转换为 File，然后使用新名称将其复制到应用程序目录。此方法需要 path_provider.dart:

import 'package:path_provider/path_provider.dart';

...
...

PickedFile pickedFile = await _picker.getImage(source: ImageSource.camera);

// Save and Rename file to App directory
String dir = (await getApplicationDocumentsDirectory()).path;
String newPath = path.join(dir, 'case01wd03id01.jpg');
File f = await File(pickedF.path).copy(newPath);

我知道问题是他们不想将其移动到新文件夹，但这是我能找到的使重命名生效的最佳方法。

Answer 3

使用此功能只重命名文件名而不改变文件路径。您可以在有或没有 image_picker.

的情况下使用此功能

import 'dart:io';

Future<File> changeFileNameOnly(File file, String newFileName) {
  var path = file.path;
  var lastSeparator = path.lastIndexOf(Platform.pathSeparator);
  var newPath = path.substring(0, lastSeparator + 1) + newFileName;
  return file.rename(newPath);
}

在 file.dart 中阅读有关您的 dart SDK 的更多文档。希望能帮到你，关注

Answer 4

Import path package

import 'package:path/path.dart' as path;

Code below

 final file =File("filepath here"); //your file path
 String dir = path.dirname(file.path); //get directory
 String newPath =path.join(dir, 'new file name'); //rename
 print(newPath); //here the newpath
 file.renameSync(newPath);

Answer 5

这对我有用

String dir = (await getApplicationDocumentsDirectory()).path;
String newPath = path.join(dir,(DateTime.now().microsecond.toString()) + '.' + file.path.split('.').last);
File f = await File(file.path).copy(newPath);

在 flutter 中重命名 file/Image

Rename a file/Image in flutter

android

ios

dart

flutter

imagepicker