我想在SurfaceView中绘制一个时钟，但指针每三次复制一次

Question

我想知道指针被复制的原因

所有指针都将转动，每次指针将被复制

如果你能详细告诉我这个原则会有很多帮助

private Canvas canvas;
private SurfaceView surfaceView;
private SurfaceHolder holder;
private void initSurface() {
    surfaceView = (SurfaceView) findViewById(R.id.surface);
    holder = surfaceView.getHolder();
    new Thread(new Runnable() {
        @Override
        public void run() {
            int time = 0;
            Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.line2);
            while (true) {
                synchronized (holder) {
                    canvas = holder.lockCanvas();
                    if (canvas != null) {
                        canvas.save();
                        canvas.rotate(360 / 60 * time,
                                Utils.getScreenWidthPx(MainActivity.this) / 2,
                                Utils.getScreenHeightPx(MainActivity.this) / 2
                        );
                        canvas.drawBitmap(bitmap
                                , Utils.getScreenWidthPx(MainActivity.this) / 2
                                , Utils.getScreenHeightPx(MainActivity.this) / 2
                                , null);
                        canvas.restore();
                    }
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    time++;
                    if (time == 60) {
                        time = 0;
                    }
                }
                if (canvas != null) {
                    holder.unlockCanvasAndPost(canvas);
                }
            }
        }
    }).start();
}

the clock