pdf_view.dart

  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);
      });
    });
  }