private void prepareAnimationBackToFilmstrip(int slotIndex) { if (mAlbumDataAdapter == null || !mAlbumDataAdapter.isActive(slotIndex)) return; MediaItem item = mAlbumDataAdapter.get(slotIndex); if (item == null) return; TransitionStore transitions = mActivity.getTransitionStore(); transitions.put(PhotoPage.KEY_INDEX_HINT, slotIndex); transitions.put(PhotoPage.KEY_OPEN_ANIMATION_RECT, mSlotView.getSlotRect(slotIndex, mRootPane)); }