用点绘制黄金螺旋线

FibonacciView.java

private void drawWithPoint(Canvas canvas, int deep) {
        float x0 = this.getMeasuredWidth() / 2;
        float y0 = this.getMeasuredHeight() / 2;
        paint.setColor(Color.BLACK);
        for (int i = 0; i < 6145; i++) {
            double angle = i * Math.PI / 512;
            double radius = 0.3 * angle;
            int y = (int) Math.round(radius * angle * Math.cos(angle));
            int x = (int) Math.round(radius * angle * Math.sin(angle));
            canvas.drawPoint(x0 + x, y0 + y, paint);
        }
}