Android的像素渲染 [英] Android subpixel rendering

问题描述

我有一条线，应该得到更薄它得到了更长的时间。问题是，你可以清楚地看到一个跳跃时，得到一个像素更薄。有没有办法做到像素渲染/反锯齿在Android？

I have a line that should get thinner the longer it gets. The problem is, that you can clearly see a jump when it gets a pixel thinner. Is there a way to do subpixel rendering/antialiasing on Android?

canvas.drawRect（）接受浮点值，但它忽略那些。这里的code：

canvas.drawRect() takes float values, but it's ignoring those. Here's the code:

@Override
protected void onDraw(Canvas canvas) {
    float width = getMeasuredWidth() / (float) getMeasuredHeight()  * getMinimumHeight();
    float left = (getMeasuredWidth() - width) / 2.0f;
    canvas.drawRect(left, 0, left + width, getMeasuredHeight(), paint);
    super.onDraw(canvas);
}

该漆对象 ANTI_ALIAS_FLAG 启用，包含纯色。

这是默认的行：

这是当它变得更长和更薄。它应该有对双方的一些抗锯齿，虽然使整个过渡更加平滑似乎

This is when it gets longer and thinner. It should have some anti aliasing on the sides, though to make the whole transition seems smoother.

推荐答案

这似乎做得更好：

@Override
protected void onDraw(Canvas canvas) {
    float width = getMeasuredWidth() / (float) getMeasuredHeight()  * getMinimumHeight();
    float left = (getMeasuredWidth() - width) / 2.0f;
    paint.setStrokeWidth(width * getResources().getDisplayMetrics().density);
    canvas.drawLine(left, 0, left, getMeasuredHeight(), paint);
    super.onDraw(canvas);
}

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