How to send dynamic url from DataProvider to PDF Flutter - flutter

Question

I'm new to Flutter. I have DataProvider which consists of Pdf data like it's Title, pdfURL and etc and I created a ListView on that ListView I have some items.
Whenever I click on any item it should open specified pdf url on PDF VIEWER. I want to pass that data dynamically to the getFileFromUrl; how should I pass that data.
This is my DataProvider class:
class DataProvider with ChangeNotifier{
List<PdfBook> _pdfItems = [
PdfBook(
id: 'p1',
title: 'PDF Bookmark Sample',
pdfUrl: 'https://www.adobe.com/support/products/enterprise/knowledgecenter/media/c4611_sample_explain.pdf',
avatar: 'T',
),
PdfBook(
id: 'p2',
title: 'PDF 995',
pdfUrl: 'http://www.pdf995.com/samples/pdf.pdf',
avatar: 'T2',
),
];
List<PdfBook> get pdfItems{
return [..._pdfItems];
}
PdfBook findById(String id){
return _pdfItems.firstWhere((item) => item.id == id);
}
}
This is my PdfViewState:
class PdfItem extends StatefulWidget {
#override
_PdfItemState createState() => _PdfItemState();
}
class _PdfItemState extends State<PdfItem> {
String assetPDFPath = "";
String urlPDFPath = "";
#override
void initState() {
super.initState();
getFileFromAsset("assets/mypdf.pdf").then((f) {
setState(() {
assetPDFPath = f.path;
print(assetPDFPath);
});
});
getFileFromUrl("http://www.pdf995.com/samples/pdf.pdf").then((f) {
setState(() {
urlPDFPath = f.path;
print(urlPDFPath);
});
});
}
Future<File> getFileFromAsset(String asset) async {
try {
var data = await rootBundle.load(asset);
var bytes = data.buffer.asUint8List();
var dir = await getApplicationDocumentsDirectory();
File file = File("${dir.path}/mypdf.pdf");
File assetFile = await file.writeAsBytes(bytes);
return assetFile;
} catch (e) {
throw Exception("Error opening asset file");
}
}
Future<File> getFileFromUrl(String url) async {
try {
var data = await http.get(url);
var bytes = data.bodyBytes;
var dir = await getApplicationDocumentsDirectory();
File file = File("${dir.path}/mypdfonline.pdf");
File urlFile = await file.writeAsBytes(bytes);
return urlFile;
} catch (e) {
throw Exception("Error opening url file");
}
}
#override
Widget build(BuildContext context) {
final pdf = Provider.of<PdfBook>(context, listen: false);
return ListTile(
title: Text(pdf.title),
onTap: () {
if (urlPDFPath != null) {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
PdfViewPage(path: urlPDFPath)));
}
},
leading: CircleAvatar(
child: Text(pdf.avatar),
backgroundColor: Theme.of(context).accentColor,
),
trailing: Icon(Icons.arrow_right),
);
}
}
This is my ListView Class:
class PdfListView extends StatelessWidget {
#override
Widget build(BuildContext context) {
final pdfData = Provider.of<DataProvider>(context);
final pdf = pdfData.pdfItems;
return Scaffold(
appBar: AppBar(
title: Text("PDF Books"),
),
body: ListView.builder(
itemCount: pdf.length,
itemBuilder: (ctx, i) => ChangeNotifierProvider.value(
value: pdf[i],
child: PdfItem(),
),
),
);
}
}