core/src/in/srain/cube/image/ImageTask.java
public void onLoading(ImageLoadHandler handler) {
        mFlag = mFlag | STATUS_LOADING;

        if (null == handler) {
            return;
        }

        if (mFirstImageViewHolder == null) {
            handler.onLoading(this, null);
        } else {
            ImageViewHolder holder = mFirstImageViewHolder;
            do {
                final CubeImageView imageView = holder.getImageView();
                if (null != imageView) {
                    handler.onLoading(this, imageView);
                }
            } while ((holder = holder.mNext) != null);
        }
    }
public void onLoading(ImageLoadHandler handler) {
        mFlag = mFlag | STATUS_LOADING;

        if (null == handler) {
            return;
        }

        if (mFirstImageViewHolder == null) {
            handler.onLoading(this, null);
        } else {
            ImageViewHolder holder = mFirstImageViewHolder;
            do {
                final CubeImageView imageView = holder.getImageView();
                if (null != imageView) {
                    handler.onLoading(this, imageView);
                }
            } while ((holder = holder.mNext) != null);
        }
    }
When loading from network

@param handler