Flutter：Dio下载文件到本地

import 'dart:io';
import 'package:dio/dio.dart';

main(){
  // 创建dio对象
  final dio = Dio();
  // 下载地址
  var url = 'https://*******.org/files/1.0.0.apk';
  // 手机端路径
  String savePath =  Directory.systemTemp.path+'/ceshi.apk';
  print(savePath);
  downLoad(dio,url,savePath);
}

downLoad(Dio dio,String url,String savePath){
  dio.download(url, savePath,onReceiveProgress:onReceiveProgress).then((value){
    print(value);
  }).whenComplete((){
    print('下载结束');
  }).catchError((onError){
    print(onError);
  });
}

// 下载的进度
void onReceiveProgress(int count, int total) {
  print('文件大小：$total  当前进度：$count');
  if(total != -1){
    print((count / total *100).toStringAsFixed(0)+'%');
  }
}