Blank page on Android, while works perfectly on iOS

[Yahllil]

Hi!

I've implemented the plugin like this:

class PdfViewPage extends StatefulWidget {
  final String fileURL;
  final String fileName;

  PdfViewPage({this.fileURL, this.fileName});

  @override
  _PdfViewPageState createState() => _PdfViewPageState();
}

class _PdfViewPageState extends State<PdfViewPage> {
  String urlPDFPath = "";
  bool exists = true;
  int _totalPages = 0;
  int _currentPage = 0;
  bool pdfReady = false;
  PDFViewController _pdfViewController;
  bool loaded = false;

  Future<File> getFileFromUrl(String url, {name}) async {
    var fileName;
    if (name != null) {
      fileName = name;
    }
    try {
      var data = await http.get(url);
      var bytes = data.bodyBytes;
      var dir = await getApplicationDocumentsDirectory();
      File file = File("${dir.path}/" + fileName + ".pdf");
      print(dir.path);
      File urlFile = await file.writeAsBytes(bytes);
      return urlFile;
    } catch (e) {
      throw Exception("Error opening url file");
    }
  }

  AppBar _getAppBar() {
    return AppBar(
      backgroundColor: Colors.teal[900],
      title: Text(widget.fileName),
    );
  }
  void requestPersmission() async {
    await PermissionHandler().requestPermissions([PermissionGroup.storage]);
  }

  @override
  void initState() {
    requestPersmission();
    getFileFromUrl(widget.fileURL, name: widget.fileName).then(
      (value) => {
        setState(() {
          if (value != null) {
            urlPDFPath = value.path;
            loaded = true;
            exists = true;
          } else {
            exists = false;
          }
        })
      },
    );
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    print(urlPDFPath);
    if (loaded) {
      return Scaffold(
        appBar: _getAppBar(),
        body: PDFView(
          filePath: urlPDFPath,
          autoSpacing: true,
          enableSwipe: true,
          pageSnap: true,
          swipeHorizontal: true,
          nightMode: false,
          onError: (e) {
            //Show some error message or UI
          },
          onRender: (_pages) {
            setState(() {
              _totalPages = _pages;
              pdfReady = true;
            });
          },
          onViewCreated: (PDFViewController vc) {
            setState(() {
              _pdfViewController = vc;
            });
          },
          onPageChanged: (int page, int total) {
            setState(() {
              _currentPage = page;
            });
          },
          onPageError: (page, e) {},
        ),
        floatingActionButton: Row(
          mainAxisAlignment: MainAxisAlignment.end,
          children: <Widget>[
            IconButton(
              icon: Icon(Icons.chevron_left),
              iconSize: 50,
              color: Colors.black,
              onPressed: () {
                setState(() {
                  if (_currentPage > 0) {
                    _currentPage--;
                    _pdfViewController.setPage(_currentPage);
                  }
                });
              },
            ),
            Text(
              "${_currentPage + 1}/$_totalPages",
              style: TextStyle(color: Colors.black, fontSize: 20),
            ),
            IconButton(
              icon: Icon(Icons.chevron_right),
              iconSize: 50,
              color: Colors.black,
              onPressed: () {
                setState(() {
                  if (_currentPage < _totalPages - 1) {
                    _currentPage++;
                    _pdfViewController.setPage(_currentPage);
                  }
                });
              },
            ),
          ],
        ),
      );
    } else {
      if (exists) {
        //Replace with your loading UI
        return Scaffold(
          appBar: _getAppBar(),
          body: Text(
            "Loading..",
            style: TextStyle(fontSize: 20),
          ),
        );
      } else {
        //Replace Error UI
        return Scaffold(
          appBar: _getAppBar(),
          body: Text(
            "PDF Not Available",
            style: TextStyle(fontSize: 20),
          ),
        );
      }
    }
  }
}

It works perfectly fine on iOS, but on Android it just loads a blank page.

Any idea how can I fix that?

[philipgiuliani]

Hi @Yahllil , how did you solve it? I have the same problem!

[alexaung]

My issue is that snapshot.data!.setPage(currentPage! + 1) is working for Previous and Next but go to page is not working if page number return from dialog. It is show white page. How did you solved this issue.