Convert PDF to JPG

Convert PDF Pages to JPG Images

The JpegDevice class allows you to convert PDF pages to JPEG images. This class provides a method named process(..) which allows you to convert a particular page of the PDF file to JPEG image.

Convert single PDF page to JPG image

Aspose.PDF for Android via Java allows you to convert a single page to Jpeg format.

To convert just one page to a JPEG image:

  1. Create an object of the Document class to get the page you want to convert.
  2. Call the process(..) method to convert the page to a JPEG image.

The following code snippet shows the steps to convert the first page of PDF to Jpeg format.

public void convertPDFtoJPEG() {
        try {
            document = new Document(inputStream);
        } catch (Exception e) {
            resultMessage.setText(e.getMessage());
            return;
        }
        File file = new File(fileStorage, "PDF-to-JPEG.jpeg");
        // Create stream object to save the output image
        try {
            OutputStream imageStream =
                    new FileOutputStream(file.toString());

            // Create Resolution object
            Resolution resolution = new Resolution(300);

            // Create JpegDevice object with particular resolution
            JpegDevice JpegDevice = new JpegDevice(resolution);

            // Convert a particular page and save the image to stream
            JpegDevice.process(document.getPages().get_Item(1), imageStream);

            // Close the stream
            imageStream.close();

            resultMessage.setText(file.toString());
        } catch (IOException e) {
            resultMessage.setText(e.getMessage());
        }
    }

Convert all PDF pages to JPG image

Aspose.PDF for Android via Java allows you to convert all pages in a PDF file to images:

  1. Loop through all pages in the file.
  2. Convert each page individually:
    • Create an object of the Document class to load the PDF document.
    • Get the page you want to convert.
    • Call the Process method to convert the page to Jpeg.

The following code snippet shows you how to convert all PDF pages to Jpeg images.

public void convertPDFtoJPEG_AllPages() {
        try {
            document = new Document(inputStream);
        } catch (Exception e) {
            resultMessage.setText(e.getMessage());
            return;
        }

        // Loop through all the pages of PDF file
        for (int pageCount = 1; pageCount <= document.getPages().size(); pageCount++) {
            // Create stream object to save the output image
            File file = new File(fileStorage, "PDF-to-JPEG"+pageCount+".jpeg");
            java.io.OutputStream imageStream;
            try {
                imageStream = new java.io.FileOutputStream(file.toString());
            } catch (FileNotFoundException e) {
                resultMessage.setText(e.getMessage());
                return;
            }

            // Create Resolution object
            Resolution resolution = new Resolution(300);
            // Create JpegDevice object with particular resolution
            JpegDevice JpegDevice = new JpegDevice(resolution);

            // Convert a particular page and save the image to stream
            JpegDevice.process(document.getPages().get_Item(pageCount), imageStream);

            // Close the stream
            try {
                imageStream.close();
            } catch (Exception e) {
                resultMessage.setText(e.getMessage());
                return;
            }
        }
        resultMessage.setText(R.string.success_message);
    }

Convert particular PDF page to JPG image

   public void convertPDFtoJPEG_ParticularPageRegion() {
        try {
            document = new Document(inputStream);
        } catch (Exception e) {
            resultMessage.setText(e.getMessage());
            return;
        }
        // Get rectangle of particular page region
        //x=0,y=0, w=200, h=125;
        Rectangle pageRect = new Rectangle(0, 0, 200, 125);
        // set CropBox value as per rectangle of desired page region
        document.getPages().get_Item(1).setCropBox(pageRect);
        // save cropped document into stream
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        document.save(outStream);

        // open cropped PDF document from stream and convert to image
        document = new Document(new ByteArrayInputStream(outStream.toByteArray()));
        // Create Resolution object
        Resolution resolution = new Resolution(300);
        // Create Jpeg device with specified attributes
        JpegDevice JpegDevice = new JpegDevice(resolution);

        File file = new File(fileStorage, "PDF-to-JPEG.jpeg");
        try {
            // Convert a particular page and save the image to stream
            JpegDevice.process(document.getPages().get_Item(1), file.toString());
        }
        catch (Exception e) {
            resultMessage.setText(e.getMessage());
        }
    }
Convert PDF to PNG