android - 如何以编程方式在 android studio 中打印包含徽标和表格的 PDF 文件

Question

单击应用程序中的查看按钮时，我创建了一个 PDF 文件。当我单击我的应用程序中的“打印”按钮时，我不知道如何打印相同的内容。我已经尝试了一些链接，但它对我不起作用。

我尝试过的链接-在android中打印现有的pdf文件

下面的代码，我用于从我的适配器文件创建/生成 PDF 文件。

SampleAdapter.java 
------------------------
 private void createPdf(String id) throws FileNotFoundException, DocumentException {

        File pdfFolder = new File(Environment.getExternalStorageDirectory(), "pdfdemo");
        //File pdfFolder = new File(context.getFilesDir(), "pdfdemo");
        if (!pdfFolder.exists()) {
            pdfFolder.mkdirs();
            Log.e("LOG_TAG", "Pdf Directory created"+pdfFolder);
        }

        //Create time stamp
        Date date = new Date() ;
        String timeStamp = new SimpleDateFormat("yyyyMMddHHmmss").format(date);

        File myFile = new File(pdfFolder +"/"+ timeStamp + ".pdf");

        OutputStream output = new FileOutputStream(myFile);

        //Step 1
        Document document = new Document(PageSize.A4, 36, 36, 36, 36);

        //Step 2
        PdfWriter writer = PdfWriter.getInstance(document, output);

        //Step 3
        document.open();



        // add image
        Drawable d = context.getResources().getDrawable(R.drawable.na);
        BitmapDrawable bitDw = ((BitmapDrawable) d);
        Bitmap bmp = bitDw.getBitmap();
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
        Image image = null;
        try {
            image = Image.getInstance(stream.toByteArray());
            image.scaleToFit(100,100);

            // image.setAbsolutePosition( 0,180);
            image.setAlignment(Element.ALIGN_LEFT);
        } catch (IOException e) {
            e.printStackTrace();
        }
        PdfPTable table = new PdfPTable(2);
        table.setWidthPercentage(100);
        table.setWidths(new int[]{1, 3});
        table.addCell(image);
        PdfPCell cell = new PdfPCell();
        Font green = new Font(Font.FontFamily.HELVETICA, 20, Font.BOLD, BaseColor.GREEN);
        Chunk redText = new Chunk("NATIONAL AGRO FOUNDATION", green);
        Paragraph p = new Paragraph();
        p.setAlignment(Element.ALIGN_CENTER);
        p.add(redText);
        cell.addElement(p);
        Font black = new Font(Font.FontFamily.HELVETICA, 12, Font.BOLD, BaseColor.BLACK);
        Chunk text2 = new Chunk("LABORATARY SERVICES DIVISION", black);
        Paragraph p2 = new Paragraph();
        p2.setAlignment(Element.ALIGN_CENTER);
        p2.add(text2);
        cell.addElement(p2);
        Font black2 = new Font(Font.FontFamily.HELVETICA, 10, Font.BOLD, BaseColor.BLACK);
        Chunk text3 = new Chunk("Tharamani, Chennai, Tamil Nadu 600113", black2);
        Paragraph p3 = new Paragraph();
        p3.setAlignment(Element.ALIGN_CENTER);
        p3.add(text3);
        cell.addElement(p3);
        Font black3 = new Font(Font.FontFamily.HELVETICA, 10, Font.BOLD, BaseColor.BLACK);
        Chunk text4 = new Chunk("Phone: [phone]", black3);
        Paragraph p4 = new Paragraph();
        p4.setAlignment(Element.ALIGN_CENTER);
        p4.add(text4);
        cell.addElement(p4);

标签： androidandroid-studio