lib-manipulation/src/main/java/com/nhaarman/listviewanimations/itemmanipulation/dragdrop/DragAndDropHandler.java
private void switchViews(final View switchView, final long switchId, final float translationY) {
        assert mHoverDrawable != null;
        assert mAdapter != null;
        assert mMobileView != null;

        final int switchViewPosition = mWrapper.getPositionForView(switchView);
        int mobileViewPosition = mWrapper.getPositionForView(mMobileView);

        ((Swappable) mAdapter).swapItems(switchViewPosition - mWrapper.getHeaderViewsCount(), mobileViewPosition - mWrapper.getHeaderViewsCount());
        ((BaseAdapter) mAdapter).notifyDataSetChanged();

        mHoverDrawable.shift(switchView.getHeight());
        mSwitchViewAnimator.animateSwitchView(switchId, translationY);
    }
private void switchViews(final View switchView, final long switchId, final float translationY) {
        assert mHoverDrawable != null;
        assert mAdapter != null;
        assert mMobileView != null;

        final int switchViewPosition = mWrapper.getPositionForView(switchView);
        int mobileViewPosition = mWrapper.getPositionForView(mMobileView);

        ((Swappable) mAdapter).swapItems(switchViewPosition - mWrapper.getHeaderViewsCount(), mobileViewPosition - mWrapper.getHeaderViewsCount());
        ((BaseAdapter) mAdapter).notifyDataSetChanged();

        mHoverDrawable.shift(switchView.getHeight());
        mSwitchViewAnimator.animateSwitchView(switchId, translationY);
    }
Switches the item that is currently being dragged with the item belonging to given id,
by notifying the adapter to swap positions and that the data set has changed.

@param switchView   the {@code View} that should be animated towards the old position of the currently dragging item.
@param switchId     the id of the item that will take the position of the currently dragging item.
@param translationY the distance in pixels the {@code switchView} should animate - i.e. the (positive or negative) height of the {@code View} corresponding to the currently
dragging item.