@Override
        public void onPageSelected(int position) {
            if (mToolbar != null && position < mImages.size()) {
                mToolbar.setTitle(getString(R.string.boxing_image_preview_title_fmt, String.valueOf(position + 1)
                        , mNeedLoading ? String.valueOf(mTotalCount) : String.valueOf(mImages.size())));
                mCurrentImageItem = (ImageMedia) mImages.get(position);
                invalidateOptionsMenu();
            }
        }
An Activity to show raw image by holding {@link BoxingViewFragment}.

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