android怎么在大圆圈里面绘制一个小圆圈？

求解答求解答求解答

public void draw() {
    try {
        canvas = sfh.lockCanvas();
        canvas.drawColor(Color.WHITE);
        //设置透明度
        paint.setColor(0x70000000);
        //绘制大圆
        canvas.drawCircle(RockerCircleX, RockerCircleY, RockerCircleR, paint);
        paint.setColor(0x70ff0000);
        //绘制小圆
        canvas.drawCircle(SmallRockerCircleX, SmallRockerCircleY, 
                SmallRockerCircleR, paint);
    } catch (Exception e) {
        // TODO: handle exception
    } finally {
        try {
            if (canvas != null)
                sfh.unlockCanvasAndPost(canvas);
        } catch (Exception e2) {
        }
    }
}

canvas 类有个 drawCircle 方法，你先用大的半径画个圆，然后再用个小的半径画个圆，这样看起来就是大圆套着小圆了。

这问题问的，就沒什么要求？