Android : Merge PDFs file using iText API not working

Question

I am trying to merge pdf file by using iText API to merge two or more PDF documents into one.But in result i am getting merge pdf with 0 byte size.I post my code as shown below.I tried with iText.jar file also but give same 0 size pdf.

And got this :-" Could not find class 'com.itextpdf.text.pdf.PdfPrinterGraphics2D', referenced from method com.itextpdf.text.pdf.PdfContentByte.createPrinterGraphicsShapes ". Still i am not getting any success.

Code:

public class ItextMerge {
        public static void main() {
            List<InputStream> list = new ArrayList<InputStream>();
            try {
                // Source pdfs
                list.add(new FileInputStream(new File("mnt/sdcard/nocturia.pdf")));
                list.add(new FileInputStream(new File("mnt/sdcard/Professional Android Application Development.pdf")));

                // Resulting pdf
                OutputStream out = new FileOutputStream(new File("mnt/sdcard/newmerge.pdf"));

                doMerge(list, out);

            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (DocumentException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        /**
         * Merge multiple pdf into one pdf
         * 
         * @param list
         *            of pdf input stream
         * @param outputStream
         *            output file output stream
         * @throws DocumentException
         * @throws IOException
         */
        public static void doMerge(List<InputStream> list, OutputStream outputStream)
                throws DocumentException, IOException {
            Document document = new Document();
            PdfWriter writer = PdfWriter.getInstance(document, outputStream);
            document.open();
            PdfContentByte cb = writer.getDirectContent();

            for (InputStream in : list) {
                PdfReader reader = new PdfReader(in);
                for (int i = 1; i <= reader.getNumberOfPages(); i++) {
                    document.newPage();
                    //import the page from source pdf
                    PdfImportedPage page = writer.getImportedPage(reader, i);
                    //add the page to the destination pdf
    //                cb.addTemplate(page, 0, 0);
    //                cb.addTemplate(page, 0, 0);
                }
            }

            outputStream.flush();
            document.close();
            outputStream.close();
        }
    }

Any idea?

Thank you

Answer 1

I upvoted Michael's answer, because it's the correct answer to your question.

However, reading your code, you have another problem you're not aware of: you're using the wrong code to merge PDFs. You should use PdfCopy or PdfSmartCopy , NOT PdfWriter !

This has been explained many times before:

• how to keep the same format on pdf after write in another one
• itextsharp: unexpected elements on copied pages
• Itext pdf Merge : Document overflow outside pdf (Text truncated) page and not displaying
• ...

The fact that you're using PdfWriter reveals that you didn't read the documentation .

Furthermore, your question sounds as if you don't know that Lowagie is a name of a person. Actually, it's my name, and it's very awkward when somebody says, Lowagie iText API not working . For starters, because I've been asking to stop using those old versions of iText, but also because it sounds like a personal accusation, confusing a product with a human being. See What is the difference between lowagie and iText?

Answer 2

Please use the Android port of iText:

http://repo.itextsupport.com//android_gae/com/itextpdf/itextgoogle/

You'll need a trial license to work with iText on Android; http://demo.itextsupport.com/newslicense/

Answer 3

Below is the Simple Code to merge the two pdf files.

    try{
        String doc1 = FOLDER_PATH + "Doc1.pdf";
        String doc2 = FOLDER_PATH + "Doc2.pdf";
        String resultDocFile = FOLDER_PATH + "ResultDoc.pdf";

        PdfReader reader1 = new PdfReader(doc1);
        Document resultDoc = new Document();
        PdfCopy copy = new PdfCopy(resultDoc, new FileOutputStream(resultDocFile));
        resultDoc.open();
        //Copying First Document
        for(int i = 1; i <= reader1.getNumberOfPages(); i++)    {
            copy.addPage(copy.getImportedPage(reader1, i));
        }
        PdfReader reader2 = new PdfReader(doc2);
        //Copying Second Document
        for(int i = 1; i <= reader2.getNumberOfPages(); i++)    {
            copy.addPage(copy.getImportedPage(reader2, i));
        }
        resultDoc.close();
    } catch (Exception e){
        e.printStackTrace(); 
    }