在 Android 的 Canvas 中绘制文本

发布于 2025-01-02 05:29:47 字数 700 浏览 2 评论 0原文

我想在画布内绘制文本（需要时自动添加新行）。这是我的示例代码：

    Bitmap src= getBitmap();
    Bitmap dest = Bitmap.createBitmap(src.getWidth(), src.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas cs = new Canvas(dest);
    cs.drawBitmap(src, 0f, 0f, null);
    TextPaint tp= new TextPaint();
    tp.setTextSize(.....);
    tp. //Custom the text properties
    StaticLayout sl= new StaticLayout(text, tp, src.getWidth(), Layout.Alignment.ALIGN_CENTER, 1.0f, 0.0f, false);
    sl.draw(cs);

这对于使用 "center|top" 重力绘制文本效果很好。但我需要能够制作“center|center”和“center|bottom”。给定画布 src 和 sl 很容易计算 sl 必须去哪里，但是如何更改 StaticLayout 的“起点”以便为其添加填充？

谢谢

原文

I want to paint text inside a Canvas (auto adding the new lines when needed). Thats my sample code:

    Bitmap src= getBitmap();
    Bitmap dest = Bitmap.createBitmap(src.getWidth(), src.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas cs = new Canvas(dest);
    cs.drawBitmap(src, 0f, 0f, null);
    TextPaint tp= new TextPaint();
    tp.setTextSize(.....);
    tp. //Custom the text properties
    StaticLayout sl= new StaticLayout(text, tp, src.getWidth(), Layout.Alignment.ALIGN_CENTER, 1.0f, 0.0f, false);
    sl.draw(cs);

this works fine for painting the text with "center|top" gravity. But I'd need to be able to make "center|center" and "center|bottom".
Given the canvas src and sl is easy to calculate where sl must go but
how can I change the "start point" for the StaticLayout in order to add it a padding?

Thanks

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