@Override
    public void onFinish(@NonNull List<BaseMedia> medias) {
        Intent intent = new Intent();
        intent.putParcelableArrayListExtra(Boxing.EXTRA_RESULT, (ArrayList<BaseMedia>) medias);
        if (mOnFinishListener != null) {
            mOnFinishListener.onBoxingFinish(intent, medias);
        }

    }
called the job is done.Click the ok button, take a photo from camera, crop a photo.
most of the time, you do not have to override.

@param medias the list of selection
boxing/src/main/java/com/bilibili/boxing/AbsBoxingViewFragment.java