pivotXType int: Specifies how pivotXValue should be interpreted. One of Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or Animation.RELATIVE_TO_PARENT.
pivotXValue: float: The X coordinate of the point about which the object is being scaled, specified as an absolute number where 0 is the left edge. (This point remains fixed while the object changes size.) This value can either be an absolute number if
pivotXType is ABSOLUTE, or a percentage (where 1.0 is 100%) otherwise.
如果設置爲：
Animation.ABSOLUTE
則pivotX就是偏移
座標值
如果設置爲：
Animation.
RELATIVE_TO_PARENT則pivotX就是相對父控件偏移值