我怎样才能像在两点之间绘制的画布上走路一样制作动画

Question

随着新地点的到来，路线正在更新。每个位置都在画布上绘制为Bitmap图像。

 if (!routeList.isEmpty() && !nodeList.isEmpty()) {

            // draw route
            for (int i = 0; i < routeList.size() - 1; i++) {

                PointF goal3 = new PointF(nodeList.get(routeList.get(i)).x, nodeList.get(routeList.get(i)).y);
                PointF goal4 = new PointF(nodeList.get(routeList.get(i + 1)).x, nodeList.get(routeList.get(i + 1)).y);

                sourceToViewCoord(goal3, vPin5);
                sourceToViewCoord(goal4, vPin6);

                path.moveTo(vPin5.x, vPin5.y);
                path.lineTo(vPin6.x, vPin6.y);                 
                canvas.drawPath(path, paint);

            }

            PointF goal1 = new PointF(nodeList.get(routeList.get(0)).x, nodeList.get(routeList.get(0)).y);

            sourceToViewCoord(goal1, vPin3);

            float vX1 = vPin3.x - (location_img.getWidth() / 2);
            float vY1 = vPin3.y - location_img.getHeight() / 2;

            canvas.drawBitmap(location_img, vX1, vY1, paint);//Location drawing on canvas as a bitmap(image)

            PointF goal2 = new PointF(nodeList.get(routeList.get(routeList.size() - 1)).x, nodeList.get(routeList.get(routeList.size() - 1)).y);


            sourceToViewCoord(goal2, vPin4);

            float vX2 = vPin4.x - (pin_red.getWidth() / 2);
            float vY2 = vPin4.y - pin_red.getHeight();

            canvas.drawBitmap(pin_red, vX2, vY2, paint);//Arrival point is drawn on the canvas as a bitmap(image)

        }