Android image resizing and preserving EXIF data (orientation, rotation, etc.)

Question

If your Android app uses the device camera to take a picture and then resizes it (this is very, very common to reduce the size for upload), you might not realize that this r

Answer 1

For the lazy ones, here's a reusable function:

public static void copyExif(String oldPath, String newPath) throws IOException
{
    ExifInterface oldExif = new ExifInterface(oldPath);

    String[] attributes = new String[]
    {
            ExifInterface.TAG_APERTURE,
            ExifInterface.TAG_DATETIME,
            ExifInterface.TAG_DATETIME_DIGITIZED,
            ExifInterface.TAG_EXPOSURE_TIME,
            ExifInterface.TAG_FLASH,
            ExifInterface.TAG_FOCAL_LENGTH,
            ExifInterface.TAG_GPS_ALTITUDE,
            ExifInterface.TAG_GPS_ALTITUDE_REF,
            ExifInterface.TAG_GPS_DATESTAMP,
            ExifInterface.TAG_GPS_LATITUDE,
            ExifInterface.TAG_GPS_LATITUDE_REF,
            ExifInterface.TAG_GPS_LONGITUDE,
            ExifInterface.TAG_GPS_LONGITUDE_REF,
            ExifInterface.TAG_GPS_PROCESSING_METHOD,
            ExifInterface.TAG_GPS_TIMESTAMP,
            ExifInterface.TAG_IMAGE_LENGTH,
            ExifInterface.TAG_IMAGE_WIDTH,
            ExifInterface.TAG_ISO,
            ExifInterface.TAG_MAKE,
            ExifInterface.TAG_MODEL,
            ExifInterface.TAG_ORIENTATION,
            ExifInterface.TAG_SUBSEC_TIME,
            ExifInterface.TAG_SUBSEC_TIME_DIG,
            ExifInterface.TAG_SUBSEC_TIME_ORIG,
            ExifInterface.TAG_WHITE_BALANCE
    };

    ExifInterface newExif = new ExifInterface(newPath);
    for (int i = 0; i < attributes.length; i++)
    {
        String value = oldExif.getAttribute(attributes[i]);
        if (value != null)
            newExif.setAttribute(attributes[i], value);
    }
    newExif.saveAttributes();
}