Android Save To Gallery

gistfile1.java

// This is an outdated way to do this...

// Inspired by:
// http://stackoverflow.com/questions/8560501/android-save-image-into-gallery/8722494#8722494
// https://gist.github.com/samkirton/0242ba81d7ca00b475b9

    public static void saveImageToGallery(ContentResolver cr, String imagePath) {
        String title = "Saved From Glance";
        String description = title;

        ContentValues values = new ContentValues();
        values.put(MediaStore.Images.Media.TITLE, title);
        values.put(MediaStore.Images.Media.DISPLAY_NAME, title);
        values.put(MediaStore.Images.Media.DESCRIPTION, description);
        values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
        // Add the date meta data to ensure the image is added at the front of the gallery
        long millis = System.currentTimeMillis();
        values.put(MediaStore.Images.Media.DATE_ADDED, millis / 1000L);
        values.put(MediaStore.Images.Media.DATE_MODIFIED, millis / 1000L);
        values.put(MediaStore.Images.Media.DATE_TAKEN, millis);

        Uri url = null;

        try {
            url = cr.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);

            if (imagePath != null) {
                final int BUFFER_SIZE = 1024;

                FileInputStream fileStream = new FileInputStream(imagePath);
                try {
                    OutputStream imageOut = cr.openOutputStream(url);
                    try {
                        byte[] buffer = new byte[BUFFER_SIZE];
                        while (true) {
                            int numBytesRead = fileStream.read(buffer);
                            if (numBytesRead <= 0) {
                                break;
                            }
                            imageOut.write(buffer, 0, numBytesRead);
                        }
                    } finally {
                        imageOut.close();
                    }
                } finally {
                    fileStream.close();
                }

                long id = ContentUris.parseId(url);
                // Wait until MINI_KIND thumbnail is generated.
                Bitmap miniThumb = MediaStore.Images.Thumbnails.getThumbnail(cr, id, MediaStore.Images.Thumbnails.MINI_KIND, null);
                // This is for backward compatibility.
                storeThumbnail(cr, miniThumb, id, 50F, 50F, MediaStore.Images.Thumbnails.MICRO_KIND);
            } else {
                cr.delete(url, null, null);
            }
        } catch (Exception e) {
            if (url != null) {
                cr.delete(url, null, null);
            }
        }
    }

    /**
     * A copy of the Android internals StoreThumbnail method, it used with the insertImage to
     * populate the android.provider.MediaStore.Images.Media#insertImage with all the correct
     * meta data. The StoreThumbnail method is private so it must be duplicated here.
     * @see android.provider.MediaStore.Images.Media (StoreThumbnail private method)
     */
    private static Bitmap storeThumbnail(
            ContentResolver cr,
            Bitmap source,
            long id,
            float width,
            float height,
            int kind) {

        // create the matrix to scale it
        Matrix matrix = new Matrix();

        float scaleX = width / source.getWidth();
        float scaleY = height / source.getHeight();

        matrix.setScale(scaleX, scaleY);

        Bitmap thumb = Bitmap.createBitmap(source, 0, 0,
                source.getWidth(),
                source.getHeight(), matrix,
                true
        );

        ContentValues values = new ContentValues(4);
        values.put(MediaStore.Images.Thumbnails.KIND, kind);
        values.put(MediaStore.Images.Thumbnails.IMAGE_ID, (int) id);
        values.put(MediaStore.Images.Thumbnails.HEIGHT, thumb.getHeight());
        values.put(MediaStore.Images.Thumbnails.WIDTH, thumb.getWidth());

        Uri url = cr.insert(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, values);

        try {
            OutputStream thumbOut = cr.openOutputStream(url);
            thumb.compress(Bitmap.CompressFormat.JPEG, 100, thumbOut);
            thumbOut.close();
            return thumb;
        } catch (FileNotFoundException ex) {
            return null;
        } catch (IOException ex) {
            return null;
        }
    }