Can generate an preview image based on the file extension. Uses the native files previewer on iOS.

Generate a preview Widget by calling await FilePreview.getThumbnail(file.path).

• An image file

• A pdf file

• A pdf file where a preview cannot be rendered

final File file = await FilePicker.getFile();
try {
    final thumbnail = await FilePreview.getThumbnail(file.path);
    setState(() {
        image = thumbnail;
    });
} catch (e) {
    image = Image.asset("");
}