我想从相机文件夹图像显示中将图像添加到pdf中，可以在pdf中添加图像吗？

Question

i am creating the pdf by using Document class,after i am downloading the images from sdcard camera folder,i want to keep all the images in pdf file,i am taking document page is A4 sizes,i want to scale image with A4 size means i want keep image with a4 sizes images.

private void addImages(Document document) {
        // TODO Auto-generated method stub

        File targetDirector = new File(targetPath);

        File[] files = targetDirector.listFiles();
        for (File file : files) {


            ByteArrayOutputStream stream = new ByteArrayOutputStream();

            thumbnails = decodeFile(file.getAbsolutePath());

            ExifInterface exif;
            try {
                exif = new ExifInterface(file.getAbsolutePath());

                String orientString = exif
                        .getAttribute(ExifInterface.TAG_ORIENTATION);

                int orientation = orientString != null ? Integer
                        .parseInt(orientString)
                        : ExifInterface.ORIENTATION_NORMAL;
                int rotationAngle = 0;

                if (orientation == ExifInterface.ORIENTATION_ROTATE_90) {
                    System.out.println("photopotart");
                    thumbnails = getResizedBitmap(thumbnails, 150, 150);
                    thumbnails
                            .compress(Bitmap.CompressFormat.JPEG, 100, stream);
                    Image myImg = null;
                    try {
                        myImg = Image.getInstance(stream.toByteArray());

                    } catch (BadElementException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (MalformedURLException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();

                    }
                    // add image to document
                    try {
                        document.newPage();
                        document.add(myImg);
                    } catch (DocumentException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                }

                else if (orientation == ExifInterface.ORIENTATION_ROTATE_180) {
                    System.out.println("180 angle");
                    rotationAngle = 180;

                    System.out.println("photo180");
                    thumbnails = getResizedBitmap180(thumbnails, 200, 200);
                    thumbnails
                            .compress(Bitmap.CompressFormat.JPEG, 100, stream);
                    Image myImg = null;
                    try {
                        myImg = Image.getInstance(stream.toByteArray());

                    } catch (BadElementException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (MalformedURLException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();

                    }
                    myImg.setAlignment(Image.LEFT);

                    // add image to document
                    try {
                        document.newPage();
                        document.add(myImg);
                    } catch (DocumentException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                } else if (orientation == ExifInterface.ORIENTATION_ROTATE_270) {
                    System.out.println("other 270");

                    System.out.println("photo270");
                    thumbnails = getResizedBitmap270(thumbnails, 200, 200);
                    thumbnails
                            .compress(Bitmap.CompressFormat.JPEG, 100, stream);
                    Image myImg = null;
                    try {
                        myImg = Image.getInstance(stream.toByteArray());

                    } catch (BadElementException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (MalformedURLException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();

                    }

                    // add image to document
                    try {
                        document.newPage();
                        document.add(myImg);
                    } catch (DocumentException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                } else {
                    System.out.println("photolandscape");

                    System.out.println("photo0");
                    // thumbnails =thumbnails.createScaledBitmap(thumbnails,
                    // 350, 250, false);
                    System.out.println("thumbnailsw" + thumbnails.getWidth());
                    System.out.println("thumbnailsh" + thumbnails.getHeight());


                    String imageUrl = file.getAbsolutePath();
                    Image image2 = Image.getInstance(file.getAbsolutePath());
                    image2.scaleAbsolute(150f, 150f);
                      document.newPage();
                      document.add(image2);
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (BadElementException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (DocumentException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        }

    }

Answer 1

try something like this

 ByteArrayOutputStream stream = new ByteArrayOutputStream();
                         Bitmap bitmap = BitmapFactory.decodeResource(getBaseContext().getResources(), R.drawable.ic_launcher);
                         bitmap.compress(Bitmap.CompressFormat.JPEG, 100 , stream);
                         Image myImg = Image.getInstance(stream.toByteArray());
                         myImg.setAlignment(Image.MIDDLE);

                         //add image to document
                         document.add(myImg);

And for scaling the image if not fill on page

 Bitmap.createScaledBitmap(unscaledBitmap, wantedWidth, wantedHeight, true);

Also go through this it has a good explanation for scaling the bitmap