@Override
                public boolean onLongClick(View v) {
                    if (mItemTouchHelper != null && itemDragEnabled) {
                        mItemTouchHelper.startDrag((RecyclerView.ViewHolder) v.getTag(R.id.BaseQuickAdapter_viewholder_support));
                    }
                    return true;
                }
Set the drag event should be trigger on long press.
Work when the toggleViewId has been set.

@param longPress by default is true.
common/src/main/java/com/sxjs/common/base/baseadapter/BaseItemDraggableAdapter.java