与drawBitmap在画布上绘制的9片图像 [英] Drawing a 9-patch image on a canvas with drawBitmap

问题描述

什么是使用9片图像资源上的自定义视图的正确方法？

What is the proper way to use a 9-patch image resource on a custom view?

我在做这样的：

background = BitmapFactory.decodeResource(getResources(), R.drawable.fundo_bookshelf);
canvas.drawBitmap(background, null, new Rect(0, y, width, y+backgroundHeight), null);

fundo_bookshelf是正确的9片图像，保存为fundo_bookshelf.9.png，如下所示：

fundo_bookshelf is a proper 9-patch image, saved as fundo_bookshelf.9.png, seen below:

但是用drawBitmap时，整个图像被拉长，而不是只与黑象素的顶部的部分，记载于本截图：

But when using the drawBitmap, the whole image is stretched, instead of only the part with the black pixel on the top, as shown on this screenshot:

推荐答案

这样的事情？

NinePatchDrawable bg =  (NinePatchDrawable) resources.getDrawable(id);
if (bg != null) {
  bg.setBounds(0, 0, getWidth(), getHeight());
  bg.draw(canvas);
  }

（对不起，我没有它适应您的code，这是从我自己的直剪切/粘贴，但希望足以去）

(sorry I didn't adapt it to your code, that is a straight cut/paste from my own, but hopefully enough to go on)

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