dependencies:
  pdf_flutter: ^version

    <key>io.flutter.embedded_views_preview</key>
    <true/>

    PDF.network(
            'https://raw.githubusercontent.com/FlutterInThai/Dart-for-Flutter-Sheet-cheet/master/Dart-for-Flutter-Cheat-Sheet.pdf',
            height: 500,
            width: 300,
    )

    File fileName;  
    PDF.file(
        fileName,
        height: 200,
        width: 100,
    )

    PDF.assets(
        "assets/pdf/demo.pdf",
        height: 200,
        width: 100,
    )