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());
}
@Override
public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) {
super.onProvideShadowMetrics(shadowSize, shadowTouchPoint);
// Double the height and width
int height = getView().getHeight() * 2;
int width = getView().getWidth() * 2;
mBitmapDrawable.setBounds(0, 0, width, height);
shadowSize.set(width, height);
// Set the touch point to the middle
shadowTouchPoint.set(width / 2, height / 2);
}