Bitmap - String Conversion

MediaUtil.java

    public String encodeThumbnail(Bitmap bitmap) {
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
        return Base64.encodeToString(stream.toByteArray(), Base64.DEFAULT);
    }

    private Bitmap decodeThumbnail(String thumbData) {
        byte[] bytes = Base64.decode(thumbData, Base64.DEFAULT);
        return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
    }