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< Android samples

StamperTest - Java (Android)

The sample shows how to use 'pdftron.PDF.Stamper' utility class to stamp PDF pages with text, images, or with other PDF pages. ElementBuilder and ElementWriter should be used for more complex PDF stamping operations.

//---------------------------------------------------------------------------------------
// 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.pdf.ColorPt;
import com.pdftron.pdf.Font;
import com.pdftron.pdf.Image;
import com.pdftron.pdf.PDFDoc;
import com.pdftron.pdf.Page;
import com.pdftron.pdf.PageSet;
import com.pdftron.pdf.Rect;
import com.pdftron.pdf.Stamper;
import com.pdftron.sdf.SDFDoc;

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

/**
 * The following sample shows how to add new content (or watermark) PDF pages
 * using 'com.pdftron.pdf.Stamper' utility class.
 * 
 * Stamper can be used to PDF pages with text, images, or with other PDF content
 * in only a few lines of code. Although Stamper is very simple to use compared
 * to ElementBuilder/ElementWriter it is not as powerful or flexible. In case you
 * need full control over PDF creation use ElementBuilder/ElementWriter to add
 * new content to existing PDF pages as shown in the ElementBuilder sample project.
 */
public class StamperTest extends PDFNetSample {

	private static OutputListener mOutputListener;

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

    public StamperTest() {
        setTitle(R.string.sample_stamper_title);
        setDescription(R.string.sample_stamper_description);
    }

	@Override
	public void run(OutputListener outputListener) {
		super.run(outputListener);
		mOutputListener = outputListener;
		mFileList.clear();
		printHeader(outputListener);
        String input_filename = "newsletter.pdf";

        //--------------------------------------------------------------------------------
        // Example 1) Add text stamp to all pages, then remove text stamp from odd pages.
        try {
            PDFDoc doc = new PDFDoc(Utils.getAssetTempFile(INPUT_PATH + input_filename).getAbsolutePath());
            doc.initSecurityHandler();
            Stamper s = new Stamper(Stamper.e_relative_scale, 0.5, 0.5);
            s.setAlignment(Stamper.e_horizontal_center, Stamper.e_vertical_center);
            ColorPt red = new ColorPt(1, 0, 0); // set text color to red
            s.setFontColor(red);
            String msg = "If you are reading this\nthis is an even page";
            PageSet ps = new PageSet(1, doc.getPageCount());
            s.stampText(doc, msg, ps);
            //delete all text stamps in even pages
            PageSet ps1 = new PageSet(1, doc.getPageCount(), PageSet.e_odd);
            Stamper.deleteStamps(doc, ps1);

            doc.save(Utils.createExternalFile(input_filename + ".ex1.pdf").getAbsolutePath(), SDFDoc.SaveMode.LINEARIZED, null);
            mFileList.add(new File(doc.getFileName()).getName());
            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        //--------------------------------------------------------------------------------
        // Example 2) Add Image stamp to first 2 pages.
        try {
            PDFDoc doc = new PDFDoc(Utils.getAssetTempFile(INPUT_PATH + input_filename).getAbsolutePath());
            doc.initSecurityHandler();

            Stamper s = new Stamper(Stamper.e_relative_scale, .05, .05);
            Image img = Image.create(doc, Utils.getAssetTempFile(INPUT_PATH + "peppers.jpg").getAbsolutePath());
            s.setSize(Stamper.e_relative_scale, 0.5, 0.5);
            //set position of the image to the center, left of PDF pages
            s.setAlignment(Stamper.e_horizontal_left, Stamper.e_vertical_center);
            ColorPt pt = new ColorPt(0, 0, 0, 0);
            s.setFontColor(pt);
            s.setRotation(180);
            s.setAsBackground(false);
            //only stamp first 2 pages
            PageSet ps = new PageSet(1, 2);
            s.stampImage(doc, img, ps);

            doc.save(Utils.createExternalFile(input_filename + ".ex2.pdf").getAbsolutePath(), SDFDoc.SaveMode.LINEARIZED, null);
            mFileList.add(new File(doc.getFileName()).getName());
            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        //--------------------------------------------------------------------------------
        // Example 3) Add Page stamp to all pages.
        try {
            PDFDoc doc = new PDFDoc(Utils.getAssetTempFile(INPUT_PATH + input_filename).getAbsolutePath());
            doc.initSecurityHandler();

            PDFDoc fish_doc = new PDFDoc(Utils.getAssetTempFile(INPUT_PATH + "fish.pdf").getAbsolutePath());
            fish_doc.initSecurityHandler();

            Stamper s = new Stamper(Stamper.e_relative_scale, 0.5, 0.5);
            Page src_page = fish_doc.getPage(1);
            Rect page_one_crop = src_page.getCropBox();
            // set size of the image to 10% of the original while keep the old aspect ratio
            s.setSize(Stamper.e_absolute_size, page_one_crop.getWidth() * 0.1, -1);
            s.setOpacity(0.4);
            s.setRotation(-67);
            //put the image at the bottom right hand corner
            s.setAlignment(Stamper.e_horizontal_right, Stamper.e_vertical_bottom);
            PageSet ps = new PageSet(1, doc.getPageCount());
            s.stampPage(doc, src_page, ps);

            doc.save(Utils.createExternalFile(input_filename + ".ex3.pdf").getAbsolutePath(), SDFDoc.SaveMode.LINEARIZED, null);
            mFileList.add(new File(doc.getFileName()).getName());
            fish_doc.close();
            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        //--------------------------------------------------------------------------------
        // Example 4) Add Image stamp to first 20 odd pages.
        try {
            PDFDoc doc = new PDFDoc(Utils.getAssetTempFile(INPUT_PATH + input_filename).getAbsolutePath());
            doc.initSecurityHandler();

            Stamper s = new Stamper(Stamper.e_absolute_size, 20, 20);
            s.setOpacity(1);
            s.setRotation(45);
            s.setAsBackground(true);
            s.setPosition(30, 40);
            Image img = Image.create(doc, Utils.getAssetTempFile(INPUT_PATH + "peppers.jpg").getAbsolutePath());
            PageSet ps = new PageSet(1, 20, PageSet.e_odd);
            s.stampImage(doc, img, ps);

            doc.save(Utils.createExternalFile(input_filename + ".ex4.pdf").getAbsolutePath(), SDFDoc.SaveMode.LINEARIZED, null);
            mFileList.add(new File(doc.getFileName()).getName());
            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        //--------------------------------------------------------------------------------
        // Example 5) Add text stamp to first 20 even pages
        try {
            PDFDoc doc = new PDFDoc(Utils.getAssetTempFile(INPUT_PATH + input_filename).getAbsolutePath());
            doc.initSecurityHandler();

            Stamper s = new Stamper(Stamper.e_relative_scale, .05, .05);
            s.setPosition(0, 0);
            s.setOpacity(0.7);
            s.setRotation(90);
            s.setSize(Stamper.e_font_size, 80, -1);
            s.setTextAlignment(Stamper.e_align_center);
            PageSet ps = new PageSet(1, 20, PageSet.e_even);
            s.stampText(doc, "Goodbye\nMoon", ps);

            doc.save(Utils.createExternalFile(input_filename + ".ex5.pdf").getAbsolutePath(), SDFDoc.SaveMode.LINEARIZED, null);
            mFileList.add(new File(doc.getFileName()).getName());
            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        //--------------------------------------------------------------------------------
        // Example 6) Add first page as stamp to all even pages
        try {
            PDFDoc doc = new PDFDoc(Utils.getAssetTempFile(INPUT_PATH + input_filename).getAbsolutePath());
            doc.initSecurityHandler();

            PDFDoc fish_doc = new PDFDoc(Utils.getAssetTempFile(INPUT_PATH + "fish.pdf").getAbsolutePath());
            fish_doc.initSecurityHandler();

            Stamper s = new Stamper(Stamper.e_relative_scale, 0.3, 0.3);
            s.setOpacity(1);
            s.setRotation(270);
            s.setAsBackground(true);
            s.setPosition(0.5, 0.5, true);
            s.setAlignment(Stamper.e_horizontal_left, Stamper.e_vertical_bottom);
            Page page_one = fish_doc.getPage(1);
            PageSet ps = new PageSet(1, doc.getPageCount(), PageSet.e_even);
            s.stampPage(doc, page_one, ps);

            doc.save(Utils.createExternalFile(input_filename + ".ex6.pdf").getAbsolutePath(), SDFDoc.SaveMode.LINEARIZED, null);
            mFileList.add(new File(doc.getFileName()).getName());
            fish_doc.close();
            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        //--------------------------------------------------------------------------------
        // Example 7) Add image stamp at top right corner in every pages
        try {
            PDFDoc doc = new PDFDoc(Utils.getAssetTempFile(INPUT_PATH + input_filename).getAbsolutePath());
            doc.initSecurityHandler();

            Stamper s = new Stamper(Stamper.e_relative_scale, .1, .1);
            s.setOpacity(0.8);
            s.setRotation(135);
            s.setAsBackground(false);
            s.showsOnPrint(false);
            s.setAlignment(Stamper.e_horizontal_left, Stamper.e_vertical_top);
            s.setPosition(10, 10);

            Image img = Image.create(doc, Utils.getAssetTempFile(INPUT_PATH + "peppers.jpg").getAbsolutePath());
            PageSet ps = new PageSet(1, doc.getPageCount(), PageSet.e_all);
            s.stampImage(doc, img, ps);

            doc.save(Utils.createExternalFile(input_filename + ".ex7.pdf").getAbsolutePath(), SDFDoc.SaveMode.LINEARIZED, null);
            mFileList.add(new File(doc.getFileName()).getName());
            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        //--------------------------------------------------------------------------------
        // Example 8) Add Text stamp to first 2 pages, and image stamp to first page.
        //          Because text stamp is set as background, the image is top of the text
        //          stamp. Text stamp on the first page is not visible.
        try {
            PDFDoc doc = new PDFDoc(Utils.getAssetTempFile(INPUT_PATH + input_filename).getAbsolutePath());
            doc.initSecurityHandler();

            Stamper s = new Stamper(Stamper.e_relative_scale, 0.07, -0.1);
            s.setAlignment(Stamper.e_horizontal_right, Stamper.e_vertical_bottom);
            s.setAlignment(Stamper.e_horizontal_center, Stamper.e_vertical_top);
            s.setFont(Font.create(doc, Font.e_courier, true));
            ColorPt red = new ColorPt(1, 0, 0, 0);
            s.setFontColor(red); //set color to red
            s.setTextAlignment(Stamper.e_align_right);
            s.setAsBackground(true); //set text stamp as background
            PageSet ps = new PageSet(1, 2);
            s.stampText(doc, "This is a title!", ps);

            Image img = Image.create(doc, Utils.getAssetTempFile(INPUT_PATH + "peppers.jpg").getAbsolutePath());
            s.setAsBackground(false); // set image stamp as foreground
            PageSet first_page_ps = new PageSet(1);
            s.stampImage(doc, img, first_page_ps);

            doc.save(Utils.createExternalFile(input_filename + ".ex8.pdf").getAbsolutePath(), SDFDoc.SaveMode.LINEARIZED, null);
            mFileList.add(new File(doc.getFileName()).getName());
            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

		for (String file : mFileList) {
			addToFileList(file);
		}
		printFooter(outputListener);
	}
    //---------------------------------------------------------------------------------------
    // The following sample shows how to add new content (or watermark) PDF pages
    // using 'pdftron.PDF.Stamper' utility class.
    //
    // Stamper can be used to PDF pages with text, images, or with other PDF content
    // in only a few lines of code. Although Stamper is very simple to use compared
    // to ElementBuilder/ElementWriter it is not as powerful or flexible. In case you
    // need full control over PDF creation use ElementBuilder/ElementWriter to add
    // new content to existing PDF pages as shown in the ElementBuilder sample project.
    //---------------------------------------------------------------------------------------

}