触摸事件,滑动时,如何动态持续获取获取X,Y坐标

int pointerIndex = touchEvent.getIndex();
int pointerId = touchEvent.getPointerId(pointerIndex);
float x = touchEvent.getPointerPosition(pointerIndex).getX();
float y = touchEvent.getPointerPosition(pointerIndex).getY();
switch (touchEvent.getAction()) {
    //手指按下
    case TouchEvent.PRIMARY_POINT_DOWN:
    case TouchEvent.OTHER_POINT_DOWN:
        startX = x;
        startY = y;
        //手指按下
        LogUtil.info("手指按下时,x坐标:" + startX + "y坐标:" + startY, "touchEventListener");
        break;
    case TouchEvent.OTHER_POINT_UP:
        //松开手指
    case TouchEvent.PRIMARY_POINT_UP:
        endX = x;
        endY = y;
        //手指松开
        LogUtil.info("手指松开时,x坐标:" + endX + "y坐标:" + endY, "touchEventListener");
        break;
        //滑动
    case TouchEvent.POINT_MOVE:
        LogUtil.info("手指在滑动时,x坐标:" + ? + "y坐标:" + ?, "touchEventListener");
        break;
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