public void moveTask(int oldPosition, int position, Task task) {
    if (oldPosition < position) {
        myDataset.add(position, task);
        myDataset.remove(oldPosition);
    } else {
        myDataset.remove(oldPosition);
        myDataset.add(position, task);
    }
    mAdapter.notifyItemMoved(oldPosition, position);
    mAdapter.notifyDataSetChanged();
    mRecyclerView.smoothScrollToPosition(position);
    MyViewHolder holder =(MyViewHolder)mRecyclerView.findViewHolderForPosition(position);
    mAdapter.expandCard(holder);
}