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I was struct in a problem that i have to download pdf or images etc from network and store them in local storage.i am trying path provider plugin with GetApplicationDocumentDirectory its successfully storing files but not showing in device folder. how to create a directory and store files such as images pdfs etc that are visible to users. how could i achieve that.

thanks for help in advance

You can write to the device external storage as shown in the below example code by creating the folder

Hope it helps

class PDFDownloader extends StatefulWidget 
 final String extension;
 final String url;
 final String fileName;

 PDFDownloader(this.url, this.fileName,[this.extension='pdf']);

 @override
 _DownloadAppState createState() => new _DownloadAppState();


class _DownloadAppState extends State<PDFDownloader> 

 bool downloading = false;
 String _message;
 var progressString = "";
 Future<Directory> _externalDocumentsDirectory;

 @override
 void initState() 
 //downloadFile();
 checkPer();
// _bannerAd = createBannerAd()..load();

 super.initState();
 

 void checkPer() async 
 await new Future.delayed(new Duration(seconds: 1));
 bool checkResult = await SimplePermissions.checkPermission(
 Permission.WriteExternalStorage);
 if (!checkResult) 
 var status = await SimplePermissions.requestPermission(
 Permission.WriteExternalStorage);
 //print("permission request result is " + resReq.toString());
 if (status == PermissionStatus.authorized) 
 await downloadFile();
 
 else 
 await downloadFile();
 
 

 @override
 Widget build(BuildContext context) 
 var scaffold= Scaffold(
 appBar: AppBar(
 title: Text("Download"),
 ),
 body: Center(
 child: downloading
 ? Container(
 height: 120.0,
 width: 200.0,
 child: Card(
 color: Colors.black,
 child: Column(
 mainAxisAlignment: MainAxisAlignment.center,
 children: <Widget>[
 CircularProgressIndicator(),
 SizedBox(
 height: 20.0,
 ),
 Text(
 "Downloading File: $progressString",
 style: TextStyle(
 color: Colors.white,
 ),
 )
 ],
 ),
 ),
 )
 : Column(
 crossAxisAlignment: CrossAxisAlignment.center,
 mainAxisAlignment: MainAxisAlignment.center,
 children: <Widget>[
 Text(_message ?? 'Please wait!!'),
 SizedBox(
 height: 10.0,
 ),
 new RaisedButton(
 textColor: Colors.white,
 color: Colors.blueAccent,
 shape: new RoundedRectangleBorder(
 borderRadius: new BorderRadius.circular(10.0)),
 onPressed: () 
 Navigator.pop(context);
 ,
 child: Text('Close'),
 )
 ],
 ),
 ),
 );
 return WillPopScope(
 onWillPop: _onWillPop,
 child: scaffold,
 );
 

 Future<bool> _onWillPop() 
 return new Future.value(!downloading);
 

 Future<void> downloadFile() async 
 var dio = new Dio();
 var dir = await getExternalStorageDirectory();
 var knockDir =
 await new Directory('$dir.path/iLearn').create(recursive: true);
 print(widget.url);
 await dio.download(widget.url, '$knockDir.path/$widget.fileName.$widget.extension',
 onProgress: (rec, total) 
 //print("Rec: $rec , Total: $total");

 if (mounted) 
 setState(() 
 downloading = true;
 progressString = ((rec / total) * 100).toStringAsFixed(0) + "%";
 );
 
 );
 if (mounted) 
 setState(() 
 downloading = false;
 progressString = "Completed";
 _message = "File is downloaded to your SD card 'iLearn' folder!";
 );
 
 print("Download completed");