Saving images and videos for offline access - flutter

Question

I am developing an app that fetches a custom object from my REST API. The object's class is called MyItem and it looks like this:
class MyItem {
String title;
String profilePicURL;
String videoURL;
}
As you can see, the class contains two URLs, that points to a png and mp4 files.
I would like to implement a feature, which allows the user to download the object, in order to access its content offline. I have no problem saving the title property, but how can I save the two URLs (because I don't want the URL itself to be saved, I would like to save the file it points to).
Any idea what is the best way doing that in Flutter and Dart?
Thank you!

Answer 1

import 'package:dio/dio.dart';
import 'package:path_provider/path_provider.dart';
var directory = await getApplicationDocumentsDirectory();
Dio dio = Dio();
//Below function will download the file you want from url and save it locally
void Download(String title, String downloadurl) async{
try{
await dio.download(downloadurl,"${directory.path}/$title.extensionoffile",
onReceiveProgress: (rec,total){
print("Rec: $rec, Total:$total");
setState(() {
//just to save completion in percentage
String progressString = ((rec/total)*100).toStringAsFixed(0)+"%";
}
);
});
}
catch(e){
//Catch your error here
}
}
Now again wherever you want just use
var directory = await getApplicationDocumentsDirectory();
String filepath = "{directory.path}/filename.fileextension";
Now you can use this Image.file('filepath'); //to display those image
also you can use
video player plugin
where again VideoPlayerController.file('filepath') //to show video but read documention properly
These are just a whole steps or a broader view, you need to use them as a map and build your code.That is have a proper file name and extension saved or correctly fetched or mapped