public void selectObject(Img img,PointInfo touchPoint){
  currTouchPoint.set(touchPoint);
  if (img != null) {
    mImages.remove(img);
    mImages.add(img);
  }
 else {
  }
  invalidate();
}

public void selectObject ( Img img , PointInfo touchPoint ) { currTouchPoint . set ( touchPoint ) ; if ( img != null ) { mImages . remove ( img ) ; mImages . add ( img ) ; } else { } invalidate ( ) ; }
select an object for dragging . called whenever an object is found to be under the point ( non - null is returned by getdraggableobjectatpoint ( ) ) and a drag operation is starting . called with null when drag op ends .
