java - 无法解析类型 java.awt.geom.AffineTransform。它是从所需的 .class 文件中间接引用的

Question

我正在使用 ItextPdf 生成 PDF 文件，但我在这一行 canvas.addImage(background, width, 0,0, height, 20, 430); 上遇到异常，即类型 java.awt.geom.AffineTransform 无法解析。它是从所需的 .class 文件中间接引用的。在这条线上，我试图设置背景图像。请帮我摆脱这个异常(exception)。

public void createPDF() throws NumberFormatException, ParseException
{
    list1.add("I-Tax Number : ");
   list1.add("Category : ");
     list1.add("Service : ");
     list1.add("Number : ");
     list1.add("Amount : ");
     list1.add("Status : ");

     list2.add(iTaxNumber);
     list2.add("Bill Payment");
     list2.add("Idea Postapid");
     list2.add("9644212111");
     list2.add("100");

     list2.add("SUCCESS");

    Font trfont = new Font(FontFamily.TIMES_ROMAN, 12, Font.BOLDITALIC,
            new BaseColor(130, 130, 140));

    Font otherfont  = new Font(FontFamily.TIMES_ROMAN, 12, Font.NORMAL,
            new BaseColor(160, 160, 160));

    Font datefont  = new Font(FontFamily.TIMES_ROMAN, 12, Font.BOLD,
            new BaseColor(130, 130, 140));

    Font thanksFont = new Font(FontFamily.TIMES_ROMAN, 14, Font.BOLDITALIC,
            new BaseColor(130, 130, 140));

    Document doc = new Document(new Rectangle(792, 612));

    try {
        String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/PDF";

        File dir = new File(path);
        if(!dir.exists())
            dir.mkdirs();

        Log.d("PDFCreator", "PDF Path: " + path);

        File file = new File(dir, "demo98989.pdf");
        FileOutputStream fOut = new FileOutputStream(file);

        PdfWriter  docPdfWriter = PdfWriter.getInstance(doc, fOut);

        Paragraph fromTotoDate = new Paragraph("Date : 25-oct-2015", datefont);
        fromTotoDate.setAlignment(Element.ALIGN_RIGHT);
        fromTotoDate.setIndentationRight(5);

        doc.addAuthor("betterThanZero");
        doc.addCreationDate();
        doc.addProducer();
        doc.addCreator("www.xyz.com");
        doc.setPageSize(PageSize.A4);
        doc.open();

        PdfPTable table = setTable(list1, list2);
        Paragraph trId = new Paragraph("Transaction Id : 889879899", trfont);
        trId.setAlignment(Element.ALIGN_RIGHT);
        trId.setIndentationRight(65);
        Paragraph p = new Paragraph("\n\n\n\n");
        Paragraph nextline = new Paragraph("\n");// for blank line
        doc.add(fromTotoDate);
        doc.add(p);
        doc.add(trId);


        int list1size =  list1.size();
        String size = String.valueOf(list1size);
        Image trDetails_Icon;


        Bitmap bmp = BitmapFactory.decodeResource(getBaseContext().getResources(),R.drawable.trreceipt);
           ByteArrayOutputStream streamTrReceipt = new ByteArrayOutputStream();
           bmp.compress(Bitmap.CompressFormat.PNG, 100, streamTrReceipt);

           trDetails_Icon = Image.getInstance(streamTrReceipt.toByteArray());
           trDetails_Icon.scaleAbsolute(445f, 238f);
           trDetails_Icon.setAbsolutePosition(76, 516);
           doc.add(trDetails_Icon);



           doc.add(nextline);
            doc.add(table);



                Paragraph thanktouMessage = new Paragraph("Thanks for Being with Us ! ", thanksFont);
                thanktouMessage.setAlignment(Element.ALIGN_CENTER);
                doc.add(nextline);
                doc.add(thanktouMessage);
                Font contFont = new Font(FontFamily.TIMES_ROMAN, 10, Font.NORMAL,
                        new BaseColor(130, 130, 140));
                doc.add(nextline);
                Paragraph cont = new Paragraph("For more info contact us", contFont);

                cont.setAlignment(Element.ALIGN_RIGHT);
                cont.setIndentationRight(20);
                doc.add(cont);

                System.out.println("list2.get(1) = "+list2.get(1));


                float width;
                float height;
                Image background;

               Bitmap bmp1 = BitmapFactory.decodeResource(getBaseContext().getResources(),R.drawable.trans);
               ByteArrayOutputStream streamTrReceipt1 = new ByteArrayOutputStream();
               bmp1.compress(Bitmap.CompressFormat.PNG, 100, streamTrReceipt1);

               System.out.println("list2.get(1) = "+list2.get(1)+"ELSE");
               width = PageSize.A4.getWidth()-40;
                     height = (PageSize.A4.getHeight()/2)-25;
                      background = Image.getInstance(streamTrReceipt1.toByteArray());


                     PdfContentByte canvas =  docPdfWriter.getDirectContentUnder();

                    canvas.addImage(background, width, 0,0, height, 20, 430);

        Toast.makeText(getApplicationContext(), "Created...", Toast.LENGTH_LONG).show();

    } catch (DocumentException de) {
        Log.e("PDFCreator", "DocumentException:" + de);
    } catch (IOException e) {
        Log.e("PDFCreator", "ioException:" + e);
    } 
    finally
    {
        doc.close();
    }
}   

Answer 1

您使用的 iText 版本有误。你应该使用 iTextG而不是“纯 Java”iText 版本。作为 Android 开发人员，您知道在 Android 上禁止使用 java.awt(和 javax.nio...)类。

“纯 Java”iText 使用未列入 Android 白名单的类(例如，在 PdfGraphics2D 类中)。这就是我们创建 iTextG 的原因。 iTextG 本质上与 iText 相同，只是我们删除了对“禁止类”的所有依赖项(java.awt.geom.AffineTransform 是这些类之一)。

iTextG 中的功能略少(我们不得不放弃 PdfGraphics2D)，但乍一看，我没有在您的代码中看到 iTextG 不支持的任何内容。

长话短说:将 iText 替换为其 Android 端口 iTextG，您的问题将得到解决。