@Override
    public void startLoading() {
        if (!mNeedLoading) {
            mCurrentImageItem = (ImageMedia) mSelectedImages.get(mStartPos);
            mToolbar.setTitle(getString(R.string.boxing_image_preview_title_fmt, String.valueOf(mStartPos + 1)
                    , String.valueOf(mSelectedImages.size())));
            mProgressBar.setVisibility(View.GONE);
            mGallery.setVisibility(View.VISIBLE);
            mAdapter.setMedias(mImages);
            if (mStartPos > 0 && mStartPos < mSelectedImages.size()) {
                mGallery.setCurrentItem(mStartPos, false);
            }
        } else {
            loadMedia(mAlbumId, mStartPos, mCurrentPage);
            mAdapter.setMedias(mImages);
        }
    }
An Activity to show raw image by holding {@link BoxingViewFragment}.

@author ChenSL
boxing-impl/src/main/java/com/bilibili/boxing_impl/ui/BoxingViewActivity.java