我想画一个很细的线（小于一个像素厚）的机器人。我使用的是

I'm trying to draw a very thin line (less than one pixel thick) in android. I'm using

Paint blackThin = new Paint();
blackThin.setStrokeWidth(0.1f);
blackThin.setColor(Color.BLACK);

初​​始化油漆对象。

to initialize the paint object.

这工作正常，在Android 2.2系统，但是当我尝试在4.2（4.1也是，我想 - 我测试了一个简单 - 我没有测试任何其他版本的其他的2.2，4.1.2和4.2）的行不会显示出来，当我画他们。为了让他们在4.2展现出来，好像我必须设置消除锯齿标志是真实的。 （我试过了，两条线出现了。）但是我真的不希望这样，因为那模糊的线条和这样的。

This works fine in Android 2.2, but when I try it in 4.2 (also 4.1, I think - I tested that one briefly - I haven't tested any other versions other that 2.2, 4.1.2 and 4.2) the lines won't show up when I draw them. To make them show up in 4.2, it seems like I have to set the anti-aliasing flag to be true. (I tried that, and the lines showed up.) But I really don't want that, because that blurs the lines and such.

这是在Android中的一个错误？有什么我可以做，使工作以外开启抗锯齿？

Is this a bug in Android? Is there something I can do to make it work other than turning on anti-aliasing?

编辑：我还测试此以0.9的像素尺寸，并且问题是相同的

I also tested this with a pixel size of 0.9, and the problem is the same.

感谢您的帮助！

推荐答案

您不能画线不到像素宽度无抗锯齿。

You can't draw lines less than a pixel in width without anti-aliasing.

抗锯齿的整点是计算什么是像素的颜色会是这样，如果一个元素没有完全填充像素（像一条线，这是一个像素的宽度仅为十分之一）。

The whole point of anti-aliasing is to calculate what a pixel's colour would be, if a element doesn't completely fill the pixel (Like a line that's only a tenth of a pixel's width).

您可以稍微画一个打火机线模拟它，但仍然不会来接近实际反走样直线。

You could somewhat simulate it by drawing a lighter line, but that still wouldn't come close to a actually anti-aliased line.

看看这个图像，例如：

这真的不是通过改变线的颜色复制的反锯齿效果。

It's really not possible to replicate the anti-aliased result by changing the line's colour.

予实现的例子中，线的宽度> 1个像素，但同样的原理也适用。一个像素的黑暗计算为多少像素的填充有行的结果。出于这个原因，一个坚实的灰线将无法正常工作。

I realise the lines in the example are > 1 pixel in width, but the same principle applies. The "darkness" of a pixel is calculated as a result of how much of the pixel is filled with the line. For that reason, a solid grey line won't work.