Exif使从相机捕获的图像空白

Question

在我的应用中，用户从相机或图库中捕获图像，然后将这些图像转换为PDF

问题是我试图编辑EXIF数据，因为三星设备会旋转图像，

但是现在PDF是空白的，但是图像显示在ImageView中但仍然旋转， 有什么建议么？

这是将图像转换为PDF的代码，包括exif编辑

 private void PDFCreation(){
        PdfDocument document=new PdfDocument();
        PdfDocument.PageInfo pageInfo;
        PdfDocument.Page page;
        Canvas canvas;
        int i;
        for (i=0; i < list.size(); i++)  {
            pageInfo=new PdfDocument.PageInfo.Builder(992, 1432, 1).create();
            page=document.startPage(pageInfo);
            canvas=page.getCanvas();
            image=BitmapFactory.decodeFile(list.get(i));
            image=Bitmap.createScaledBitmap(image, 980, 1420, true);
            image.setDensity(DisplayMetrics.DENSITY_300);
            canvas.setDensity(DisplayMetrics.DENSITY_300);

            float rotation=0;
            try {
                ExifInterface exifInterface=new ExifInterface(selectedPhoto);
                int orientation=exifInterface.getAttributeInt(TAG_ORIENTATION, ORIENTATION_NORMAL);
                switch (orientation) {
                    case ExifInterface.ORIENTATION_ROTATE_90: {
                        rotation=-90f;
                        break;
                    }
                    case ExifInterface.ORIENTATION_ROTATE_180: {
                        rotation=-180f;
                        break;
                    }
                    case ExifInterface.ORIENTATION_ROTATE_270: {
                        rotation=90f;
                        break;
                    }
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

            Matrix matrix = new Matrix();
            matrix.postRotate(rotation);
            Bitmap.createBitmap(image, 0, 0,
                    image.getWidth(), image.getHeight(),
                    matrix, true);

            canvas.drawBitmap(image, 0, 0, null);
            document.finishPage(page);
        }
        @SuppressWarnings("deprecation") String directory_path=Environment.getExternalStorageDirectory().getPath() + "/mypdf/";
        File file=new File(directory_path);
        if (!file.exists()) {
            //noinspection ResultOfMethodCallIgnored
            file.mkdirs();
        }
        @SuppressLint("SimpleDateFormat") String timeStamp=(new SimpleDateFormat("yyyyMMdd_HHmmss")).format(new Date());
        String targetPdf=directory_path + timeStamp + ".pdf";
         filePath=new File(targetPdf);
        try {
            document.writeTo(new FileOutputStream(filePath));
        } catch (IOException e) {
            Log.e("main", "error " + e.toString());
            Toasty.error(this, "Error making PDF" + e.toString(), Toast.LENGTH_LONG).show();
        }
        document.close();
    }