public final void startDrag(View.DragShadowBuilder dragShadowBuilder) {
Point shadowSize = new Point();
Point shadowTouchPoint = new Point();
dragShadowBuilder.onProvideShadowMetrics(shadowSize, shadowTouchPoint);
itemView.startDrag(
null,
dragShadowBuilder,
new DragInfo(getItemId(), shadowSize, shadowTouchPoint, adapter.getLastTouchPoint()),
0);
adapter.notifyItemChanged(getAdapterPosition());
}
public final void startDrag() {
PointF touchPoint = adapter.getLastTouchPoint();
int x = (int) (touchPoint.x - itemView.getX());
int y = (int) (touchPoint.y - itemView.getY());
startDrag(getShadowBuilder(itemView, new Point(x, y)));
}