ItemDecoration overriding getItemOffsets() and animation

Question

I am applying equal margins to my RecyclerView using GridLayoutManager by overriding the getItemOffsets() method (see my code below).

However, when an Object is removed from the adapter the remove animation is called without the offsets. Thus, the anmiation starts at a different position than the object to be removed.

I tried to get the position via getSpanIndex(position) but the position (parent.getChildAdapterPosition(view)) returns NO_POSITION since the object has already been removed from the adapter, when getItemOffsets() is called.

Is there any way to get the offsets in my case?

@Override
public void getItemOffsets(Rect outRect, View view, 
                     RecyclerView parent, RecyclerView.State state) {

    GridLayoutManager mgr = parent.getLayoutManager();
    int position = parent.getChildAdapterPosition(view);

    if (position == RecyclerView.NO_POSITION) {
       // here I need to access the position of the current element
       // and call outRect.set(left, top , right, bottom);
       // which is not possible because it is no longer in the adapter
        return;
    } 

    int spanCount = mgr.getSpanCount();
    int spanSize = mgr.getSpanSizeLookup().getSpanSize(position);
    int spanIndex = mgr.getSpanSizeLookup().getSpanIndex(position, spanCount);

    if (spanIndex == spanCount-1) {
        // last element
        left = space / 2;
        right = space;
    } else if (spanIndex == 0) {
        // first element
        left = space;
        right = space / 2;
    } else {
        // middle element
        left = space / 2;
        right = space / 2;
    }
    outRect.set(left, top, right, bottom);
}

Answer 1

Try using the views LayoutParams. If you don't use some custom LayoutManager, it should contain the information you need.

int position = ((RecyclerView.LayoutParams) view.getLayoutParams()).getViewAdapterPosition();