Remove or update exif thumbnail from image

Question

Is there anyway to remove an exif thumbnail from an image?

I'm cropping images in my app and copying all exif data lossless with the sanselan library. Afterwards, I update width/height/rotation accordingly.

I could not find any way to update the exif thumbnail or to remove it, any ideas how to do that?

The full `ExifInterface` code from the AOSP, such as [this set of code in the Camera2 app](https://android.googlesource.com/platform/packages/apps/Camera2/+/master/src/com/android/camera/exif/ExifInterface.java), has methods to work with EXIF thumbnails. — CommonsWare, Jun 26 '16 at 16:09
I'll check that out. On my first look, following library seems to use the same code: https://github.com/sephiroth74/Android-Exif-Extended... Won't work with streams though... — prom85, Jun 26 '16 at 16:18
PS: I think looking into the code I can adjust that to sanselan classes... — prom85, Jun 26 '16 at 16:20

score 0 · Answer 1 · answered Nov 01 '17 at 11:39

I have similar kind of problem of exif data

private void removeThumbnails(ContentResolver contentResolver, long photoId) {
        try {
            Cursor thumbnails = contentResolver.query(
                    MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, null, MediaStore.Images.Thumbnails.IMAGE_ID
                            + "=?", new String[]{String.valueOf(photoId)}, null);
            if (thumbnails != null) {
                for (thumbnails.moveToFirst(); !thumbnails.isAfterLast() && !thumbnails.isBeforeFirst(); thumbnails.moveToNext()) {

                    long thumbnailId = thumbnails.getLong(thumbnails.getColumnIndex(MediaStore.Images.Thumbnails._ID));
                    String path = thumbnails.getString(thumbnails.getColumnIndex(MediaStore.Images.Thumbnails.DATA));
                    File file = new File(path);
                    if (file.delete()) {
                        contentResolver.delete(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, MediaStore.Images.Thumbnails._ID + "=?",
                                new String[]{String.valueOf(thumbnailId)});
                    }
                }
                thumbnails.close();
            }
        } catch (Exception e) {
        }
    }

So I have removed the thumbnail of it first then done the operation on the image

So u can try removing the thumbnail and try to crop it after

Remove or update exif thumbnail from image

1 Answers1