首先需要确保xgrads库的安装： pip install xgrads Install from github 或者 git clone https://...
String url) async {var request = http.MultipartRequest('POST', Uri.parse(url));request.files.add(http.MultipartFile.fromBytes('file', chunk));var response = await request.send();if (response.statusCode == 200) {print('Uploaded!');} else {print('Failed to upload.');}} ...
我们可以使用 readAsBytes 方法来读取图片文件,然后使用 Image.memory 构造函数来创建一个图片控件。 import 'dart:io'; import 'package:flutter/material.dart'; void main() async { var file = File('path_to_your_image_file'); var bytes = await file.readAsBytes(); var image = Image.memory(byt...
3、将ByteData写入File,并执行微信图片分享 import'dart:ui'asui;import'dart:async';import'dart:io';import'package:path_provider/path_provider.dart';/// 把图片ByteData写入File,并触发微信分享Future<Null>_shareUiImage()async{ByteDatasourceByteData=await_capturePngToByteData();Uint8ListsourceBytes=sou...
var dir = await localfileDir(); String documentPath = dir.path; // 拿到文件的存储路径 String savePath = "$documentPath/download"; // 从磁盘读取zip文件 List<int> bytes = File(url).readAsBytesSync(); // 解码zip文件 try { Archive archive = ZipDecoder().decodeBytes(bytes); ...
#0 _File.throwIfError (dart:io/file_impl.dart:675:7) #1 _File.openSync (dart:io/file_impl.dart:490:5) #2 _File.readAsBytesSync (dart:io/file_impl.dart:574:18) #3 _File.readAsStringSync (dart:io/file_impl.dart:624:18) #4 ForwardingFile.readAsStringSync (package:file/src/forw...
图片final http.Response response=awaithttp.get(Uri.parse(_url));// 获取临时的文件夹final dir=awaitgetTemporaryDirectory();// 创建一个图像名称varfilename='${dir.path}/SaveImage${random.nextInt(100)}.png';// 保存到文件系统final file=File(filename);awaitfile.writeAsBytes(response.bodyBytes)...
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await file.writeAsBytes(response.bodyBytes); // 询问用户是否保存它 final params = SaveFileDialogParams(sourceFilePath: file.path); final finalPath = await FlutterFileDialog.saveFile(params: params); if(filePath != null) { message = 'Image saved to disk' ...
String file_contentType, // 默认为null,自动获取 }) async { try { List<int> bytes = await file.readAsBytes(); return await httpUploadFileData(url, bytes, accept: accept, token: token, field: field, file_contentType: file_contentType, filename: file.path); } catch (e) { return new...