@Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode) {
            case Constants.REQUEST_CODE_ADD_VIDEO_FROM_GALLERY:
                boolean isGranted = false;
                for (int result : grantResults) {
                    if (result == PackageManager.PERMISSION_GRANTED) {
                        isGranted = true;
                    } else {
                        isGranted = false;
                        break;
                    }
                }
                if (isGranted) {
                  //do something
                } else {
                  //show explanation message
                }
                break;
        }
    }