ExifCopier.java

package net.aboutgoods.agkit.scan.utils;

import android.media.ExifInterface;
import android.os.Build;
import android.util.Log;

import org.json.JSONException;
import org.json.JSONObject;

import java.io.File;

public class ExifCopier {

    private static final String TAG = "ExifCopier";

    private static String make;
    private static String model;
    private static float aperture;
    private static String datetime;
    private static float exposureTime;
    private static float flash;
    private static String focalLength;
    private static String gpsAltitude;
    private static String gpsAltitudeRef;
    private static String gpsDatestamp;
    private static String gpsLatitude;
    private static String gpsLatitudeRef;
    private static String gpsLongitude;
    private static String gpsLongitudeRef;
    private static String gpsProcessingMethod;
    private static String gpsTimestamp;
    private static int imageLength;
    private static int imageWidth;
    private static String iso;
    private static int orientation;
    private static int whiteBalance;

    private ExifCopier() {
    }

    public static ExifCopier saveExifData(File file) {
        try {
            // copy paste exif information from original file
            ExifInterface exif = new ExifInterface(file.getPath());

            int build = Build.VERSION.SDK_INT;

            // From API 11
            if (build >= 11) {
                aperture = Float.parseFloat(exif.getAttribute("FNumber"));
                exposureTime = Float.parseFloat(exif.getAttribute("ExposureTime"));
                iso = exif.getAttribute("ISOSpeedRatings");
            }
            // From API 9
            if (build >= 9) {
                gpsAltitude = exif.getAttribute("GPSAltitude");
                gpsAltitudeRef = exif.getAttribute("GPSAltitudeRef");
            }
            // From API 8
            if (build >= 8) {
                focalLength = exif.getAttribute("FocalLength");
                gpsDatestamp = exif.getAttribute("GPSDateStamp");
                gpsProcessingMethod = exif.getAttribute("GPSProcessingMethod");
                gpsTimestamp = exif.getAttribute("GPSTimeStamp");
            }

            datetime = exif.getAttribute("DateTime");
            //flash = Float.parseFloat(exif.getAttribute("Flash"));
            gpsLatitude = exif.getAttribute("GPSLatitude");
            gpsLatitudeRef = exif.getAttribute("GPSLatitudeRef");
            gpsLongitude = exif.getAttribute("GPSLongitude");
            gpsLongitudeRef = exif.getAttribute("GPSLongitudeRef");

            imageLength = Integer.parseInt(exif.getAttribute("ImageLength"));
            imageWidth = Integer.parseInt(exif.getAttribute("ImageWidth"));

            make = exif.getAttribute("Make");
            model = exif.getAttribute("Model");
            orientation = Integer.parseInt(exif.getAttribute("Orientation"));
            whiteBalance = Integer.parseInt(exif.getAttribute("WhiteBalance"));

        } catch (Exception e) {
            e.printStackTrace();
            Log.e(TAG, "saveExifData: " + e.getMessage());
        }

        return new ExifCopier();
    }

    public void copyTo(File file) {
        try {
            // copy paste exif information from original file to new
            // file
            ExifInterface exif = new ExifInterface(file.getPath());

            int build = Build.VERSION.SDK_INT;

            // From API 11
            if (build >= 11) {
                exif.setAttribute("FNumber", String.valueOf(aperture));
                exif.setAttribute("ExposureTime", String.valueOf(exposureTime));
                exif.setAttribute("ISOSpeedRatings", iso);
            }
            // From API 9
            if (build >= 9) {
                exif.setAttribute("GPSAltitude", gpsAltitude);
                exif.setAttribute("GPSAltitudeRef", gpsAltitudeRef);
            }
            // From API 8
            if (build >= 8) {
                exif.setAttribute("FocalLength", focalLength);
                exif.setAttribute("GPSDateStamp", gpsDatestamp);
                exif.setAttribute("GPSProcessingMethod", gpsProcessingMethod);
                exif.setAttribute("GPSTimeStamp", gpsTimestamp);
            }

            exif.setAttribute("DateTime", datetime);
            exif.setAttribute("Flash", String.valueOf(flash));
            exif.setAttribute("GPSLatitude", gpsLatitude);
            exif.setAttribute("GPSLatitudeRef", gpsLatitudeRef);
            exif.setAttribute("GPSLongitude", gpsLongitude);
            exif.setAttribute("GPSLongitudeRef", gpsLongitudeRef);

            exif.setAttribute("ImageLength", String.valueOf(imageLength));
            exif.setAttribute("ImageWidth", String.valueOf(imageWidth));

            exif.setAttribute("Make", make);
            exif.setAttribute("Model", model);
            exif.setAttribute("Orientation", String.valueOf(orientation));
            exif.setAttribute("WhiteBalance", String.valueOf(whiteBalance));

            exif.saveAttributes();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public int getOrientation() {
        return orientation;
    }

    public JSONObject getJsonExifInfo() {

        JSONObject json = new JSONObject();

        try {
            json.put("make", make);
            json.put("model", model);
            json.put("aperture", aperture);
            json.put("datetime", datetime);
            json.put("exposureTime", exposureTime);
            json.put("flash", flash);
            json.put("focalLength", focalLength);
            json.put("gpsAltitude", gpsAltitude);
            json.put("gpsAltitudeRef", gpsAltitudeRef);
            json.put("gpsDatestamp", gpsDatestamp);
            json.put("gpsLatitude", gpsLatitude);
            json.put("gpsLatitudeRef", gpsLatitudeRef);
            json.put("gpsLongitude", gpsLongitude);
            json.put("gpsLongitudeRef", gpsLongitudeRef);
            json.put("gpsProcessingMethod", gpsProcessingMethod);
            json.put("gpsTimestamp", gpsTimestamp);
            json.put("imageLength", imageLength);
            json.put("imageWidth", imageWidth);
            json.put("iso", iso);
            json.put("orientation", orientation);
            json.put("whiteBalance", whiteBalance);
        } catch (JSONException e) {
            e.printStackTrace();
        }

        return json;
    }
}