安装应用程序时创建文件夹 [英] Create Folder When Installing Application

问题描述

如何在设备存储中创建文件夹以保存文件?

How to create folder in device storage to save files?

这是将文件下载到设备中的代码:

This is the code to download file into device :

import 'package:flutter_downloader/flutter_downloader.dart';

onTap: () async { //ListTile attribute
   Directory appDocDir = await getApplicationDocumentsDirectory();                
   String appDocPath = appDocDir.path;
   final taskId = await FlutterDownloader.enqueue(
     url: 'http://myapp/${attach[index]}',
     savedDir: '/sdcard/myapp',
     showNotification: true, // show download progress in status bar (for Android)
     clickToOpenDownloadedFile: true, // click on notification to open downloaded file (for Android)
   );
},

推荐答案

您可以在启动应用程序时创建目录. 在第一个屏幕的initState()方法中，执行逻辑.

You can create directory when app is launched. In the initState() method of your first screen do the logic.

例如.

createDir() async {
  Directory baseDir = await getExternalStorageDirectory(); //only for Android
  // Directory baseDir = await getApplicationDocumentsDirectory(); //works for both iOS and Android
  String dirToBeCreated = "<your_dir_name>";
  String finalDir = join(baseDir, dirToBeCreated);
  var dir = Directory(finalDir);
  bool dirExists = await dir.exists();
  if(!dirExists){
     dir.create(/*recursive=true*/); //pass recursive as true if directory is recursive
  }
  //Now you can use this directory for saving file, etc.
  //In case you are using external storage, make sure you have storage permissions.
}

@override
initState(){
  createDir(); //call your method here
  super.initState();
}

您需要导入以下库:

import 'dart:io';
import 'package:path/path.dart';
import 'package:path_provider/path_provider.dart';

这篇关于安装应用程序时创建文件夹的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！