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PDF Packages (Portfolios) in Java (Android)

Sample Java (Android) code to use PDFTron SDK for creating, extracting, and manipulating PDF packages (also known as PDF portfolios). Learn more about our PDF Parsing & Content Extraction Library.

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Step 2: Add the code:

//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2018 by PDFTron Systems Inc. All Rights Reserved.
// Consult legal.txt regarding legal and license information.
//---------------------------------------------------------------------------------------

package com.pdftron.android.pdfnetsdksamples.samples;

import com.pdftron.android.pdfnetsdksamples.OutputListener;
import com.pdftron.android.pdfnetsdksamples.PDFNetSample;
import com.pdftron.android.pdfnetsdksamples.R;
import com.pdftron.android.pdfnetsdksamples.util.Utils;
import com.pdftron.common.PDFNetException;
import com.pdftron.filters.Filter;
import com.pdftron.pdf.ColorPt;
import com.pdftron.pdf.ColorSpace;
import com.pdftron.pdf.Element;
import com.pdftron.pdf.ElementBuilder;
import com.pdftron.pdf.ElementWriter;
import com.pdftron.pdf.FileSpec;
import com.pdftron.pdf.Font;
import com.pdftron.pdf.PDFDoc;
import com.pdftron.pdf.Page;
import com.pdftron.pdf.Rect;
import com.pdftron.sdf.NameTree;
import com.pdftron.sdf.NameTreeIterator;
import com.pdftron.sdf.Obj;
import com.pdftron.sdf.SDFDoc;

import java.io.File;
import java.util.ArrayList;

//-----------------------------------------------------------------------------------
//This sample illustrates how to create, extract, and manipulate PDF Portfolios
//(a.k.a. PDF Packages) using PDFNet SDK.
//-----------------------------------------------------------------------------------

public class PDFPackageTest extends PDFNetSample {

	private static OutputListener mOutputListener;

	private static ArrayList<String> mFileList = new ArrayList<>();

    public PDFPackageTest() {
        setTitle(R.string.sample_pdfpackage_title);
        setDescription(R.string.sample_pdfpackage_description);
    }

	@Override
	public void run(OutputListener outputListener) {
		super.run(outputListener);
		mOutputListener = outputListener;
		mFileList.clear();
		printHeader(outputListener);

        // Create a PDF Package.
        try {
            PDFDoc doc = new PDFDoc();
            addPackage(doc, Utils.getAssetTempFile(INPUT_PATH + "numbered.pdf").getAbsolutePath(), "My File 1");
            addPackage(doc, Utils.getAssetTempFile(INPUT_PATH + "newsletter.pdf").getAbsolutePath(), "My Newsletter...");
            addPackage(doc, Utils.getAssetTempFile(INPUT_PATH + "peppers.jpg").getAbsolutePath(), "An image");
            addCoverPage(doc);
            doc.save(Utils.createExternalFile("package.pdf").getAbsolutePath(), SDFDoc.SaveMode.LINEARIZED, null);
            mFileList.add(new File(doc.getFileName()).getName());
            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

        // Extract parts from a PDF Package.
        try {
            PDFDoc doc = new PDFDoc(Utils.createExternalFile("package.pdf").getAbsolutePath());
            doc.initSecurityHandler();

            com.pdftron.sdf.NameTree files = NameTree.find(doc.getSDFDoc(), "EmbeddedFiles");
            if (files.isValid()) {
                // Traverse the list of embedded files.
                NameTreeIterator i = files.getIterator();
                for (int counter = 0; i.hasNext(); i.next(), ++counter) {
                    String entry_name = i.key().getAsPDFText();
                    mOutputListener.println("Part: " + entry_name);

                    FileSpec file_spec = new FileSpec(i.value());
                    Filter stm = file_spec.getFileData();
                    if (stm != null) {
                        String fname = Utils.createExternalFile("extract_").getAbsolutePath() + counter;
                        stm.writeToFile(fname, false);
                    }
                }
            }
            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

		for (String file : mFileList) {
			addToFileList(file);
		}
		printFooter(outputListener);
	}

    static void addPackage(PDFDoc doc, String file, String desc) throws PDFNetException {
        NameTree files = NameTree.create(doc.getSDFDoc(), "EmbeddedFiles");
        FileSpec fs = FileSpec.create(doc, file, true);
        files.put(file.getBytes(), fs.getSDFObj());
        fs.getSDFObj().putText("Desc", desc);

        Obj collection = doc.getRoot().findObj("Collection");
        if (collection == null) collection = doc.getRoot().putDict("Collection");

        // You could here manipulate any entry in the Collection dictionary.
        // For example, the following line sets the tile mode for initial view mode
        // Please refer to section '2.3.5 Collections' in PDF Reference for details.
        collection.putName("View", "T");
    }

    static void addCoverPage(PDFDoc doc) throws PDFNetException {
        // Here we dynamically generate cover page (please see ElementBuilder
        // sample for more extensive coverage of PDF creation API).
        Page page = doc.pageCreate(new Rect(0, 0, 200, 200));

        ElementBuilder b = new ElementBuilder();
        ElementWriter w = new ElementWriter();
        w.begin(page);
        Font font = Font.create(doc.getSDFDoc(), Font.e_helvetica);
        w.writeElement(b.createTextBegin(font, 12));
        Element e = b.createTextRun("My PDF Collection");
        e.setTextMatrix(1, 0, 0, 1, 50, 96);
        e.getGState().setFillColorSpace(ColorSpace.createDeviceRGB());
        e.getGState().setFillColor(new ColorPt(1, 0, 0));
        w.writeElement(e);
        w.writeElement(b.createTextEnd());
        w.end();
        doc.pagePushBack(page);

        // Alternatively we could import a PDF page from a template PDF document
        // (for an example please see PDFPage sample project).
        // ...
    }

}