java.lang.RuntimeException: Couldn't open the font file

[xiechunjiang]

hi

1. When I use Apache-POI to convert PPTX to PDF on Android, it reports 'java.lang.RuntimeException: Couldn't open the font file'. The code is as follows:``` public static boolean convertPPTToPDF(File file, File toFile) { try { Document pdfDocument = new Document(); PdfWriter pdfWriter = PdfWriter.getInstance(pdfDocument, new FileOutputStream(toFile)); FileInputStream is = new FileInputStream(file); double zoom = 2;

       is = new FileInputStream(file);
       XMLSlideShow ppt = convertPPTToPDFByPPTX(is);
       if (ppt == null) {
           throw new NullPointerException("This PPTX get data is error....");
       }
       Dimension pgsize = ppt.getPageSize();
       List<XSLFSlide> slide = Arrays.asList(ppt.getSlides());
   
       AffineTransform at = new AffineTransform();
       at.setToScale(zoom, zoom);
       pdfDocument.setPageSize(new com.lowagie.text.Rectangle((float) pgsize.getWidth(), (float) pgsize.getHeight()));
       pdfWriter.open();
       pdfDocument.open();
       PdfPTable table = new PdfPTable(1);
       for (XSLFSlide xslfSlide : slide) {
           BufferedImage img = new BufferedImage((int) Math.ceil(pgsize.width * zoom), (int) Math.ceil(pgsize.height * zoom), BufferedImage.TYPE_INT_RGB);
           /*InputStream open = AppManager.getAppManager().getTopActivity().getAssets().open("fonts/simsun.ttf");
           java.awt.Font fonts = java.awt.Font.createFont(java.awt.Font.TRUETYPE_FONT, open);
           java.awt.GraphicsEnvironment localGraphicsEnvironment =  java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment();*/
           Graphics2D graphics = img.createGraphics();
           graphics.setTransform(at);
           graphics.setPaint(Color.white);
           graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));
           xslfSlide.draw(graphics);
           graphics.getPaint();
           com.lowagie.text.Image slideImage = com.lowagie.text.Image.getInstance(img, null);
           table.addCell(new PdfPCell(slideImage, true));
       }

// ppt.close(); pdfDocument.add(table); pdfDocument.close(); pdfWriter.close(); Log.e("Exception", file.getAbsolutePath() + "Powerpoint file converted to PDF successfully"); return true;

    } catch (Exception e) {
        Log.e("Exception", file.getAbsolutePath() + "--->" + e);
        return false;
    }
}

private static XMLSlideShow convertPPTToPDFByPPTX(FileInputStream is) {
    try {
        return new XMLSlideShow(is);
    } catch (IOException e) {
        return null;
    }
}```