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I'm looking for a Java library that will can take a PDF and create a thumbnail image (PNG) from the first page.
I've already looked at JPedal, but its insane licensing fee is completely prohibitive. I am using iText to manipulate PDF files at the moment, but I believe it doesn't do thumbnail generation. I can use something like Ghostscript on the command line, but I'm hoping to keep my project all-Java if possible.
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PDF Renderer
is a LGPL licensed pure-java library that makes this as simple as (taken from their example page):
File file = new File("test.pdf");
RandomAccessFile raf = new RandomAccessFile(file, "r");
FileChannel channel = raf.getChannel();
ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
PDFFile pdffile = new PDFFile(buf);
// draw the first page to an image
PDFPage page = pdffile.getPage(0);
//get the width and height for the doc at the default zoom
Rectangle rect = new Rectangle(0,0,
(int)page.getBBox().getWidth(),
(int)page.getBBox().getHeight());
//generate the image
Image img = page.getImage(
rect.width, rect.height, //width & height
rect, // clip rect
null, // null for the ImageObserver
true, // fill background with white
true // block until drawing is done
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create Multiple PDF file's thumbnails in adapter as like images loading using Picasso or Glide
You need to integrate picasso library
After that
You need to create PdfRequestHandler class :-
public class PdfRequestHandler extends RequestHandler{
public static String SCHEME_PDF="pdf";
@Override
public boolean canHandleRequest(Request data)
String scheme = data.uri.getScheme();
return (SCHEME_PDF.equals(scheme));
@Override
public Result load(Request data, int arg1) throws IOException
ParcelFileDescriptor fileDescriptor = ParcelFileDescriptor.open(new File(data.uri.getPath()), MODE_READ_ONLY);
PdfRenderer renderer = new PdfRenderer(fileDescriptor);
final int pageCount = renderer.getPageCount();
if(pageCount > 0){
PdfRenderer.Page page = renderer.openPage(0);
Bitmap bitmap = Bitmap.createBitmap(page.getWidth(), page.getHeight(),Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawColor(Color.WHITE);
canvas.drawBitmap(bitmap, 0, 0, null);
page.render(bitmap, null, null, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);
page.close();
return new Result(bm,LoadedFrom.DISK);
return null;
After That create instance in adapter
Picasso picassoInstance;
Initilize the instance in constructor of adapter
picassoInstance = new Picasso.Builder(context.getApplicationContext())
.addRequestHandler(new PdfRequestHandler())
.build();
Then load file from path in bindViewHolder method of adapter
picassoInstance.load(PdfRequestHandler.SCHEME_PDF+":"+filePath)
.fit()
.into(holder.pdfThumbnailImageView);
Qoppa Software has a java SDK that can convert PDFs to images.
https://www.qoppa.com/pdfimages/
//Export the first page in all three formats
pdfDoc.savePagesAsJPEG(0, "c:\\somefile.jpg",150,0.80f);
pdfDoc.savePagesAsTIFF(0, "c:\\somefile.jpg",150,TIFFCompression.TIFF_FAX_GROUP4));
pdfDoc.savePagesAsPNG(0, "c:\\somefile.jpg",150f);
Thumbnails4j (I'm a maintainer, but it's owned by Elastic) is an Apache 2 licensed library for creating thumbnails, and supports PDF inputs.
File input = new File("/path/to/my_file.pdf");
Thumbnailer thumbnailer = new PDFThumbnailer();
List<Dimensions> outputDimensions = Collections.singletonList(new Dimensions(100, 100));
BufferedImage output = thumbnailer.getThumbnails(input, outputDimensions).get(0);
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