通过使用填充展开了ImageView的可点击的区域？ [英] Expand clickable area of an ImageView by using padding?

问题描述

我有一个ImageView的，我希望它是点击。图像本身只有32×32像素，但我想要的点击范围要大一些，以便更容易打。我希望我可以设置布局边距值增加的ImageView点击区域的大小：

I have an ImageView, and I want it to be clickable. The image itself is only 32x32 pixels, but I want the clickable region to be larger so it's easier to hit. I was hoping I could set the layout margin values to increase the size of the imageview's clickable area:

<ImageView
   layout_width="32dip"
   layout_height="32dip"
   layout_margin="20dip" />

这不工作，有什么我可以做的就是重建图像资源具有较大的透明区域周围。这是一个有点恼人，因为它很难调整，如果我需要更改可点击区域。这不只是一个单一的PNG或者说，它是一个statelistdrawable所以我必须要调整3个不同的png格式，如果我以往任何时候都需要调整可点击区域。

That doesn't work, what I could do is just recreate the image resource to have a larger transparent region around it. That's a bit annoying because it's hard to tweak if I ever need to change the clickable region. It's not just a single png either, it's a statelistdrawable so I have to resize 3 different pngs if I ever need to tweak the clickable area.

我还能做什么？

感谢

推荐答案

建议（从来没有尝试过我自己）：

Suggestions (never tried it myself):

1. 创建ImageView的一样大，你想不是把图像转换成它不进行缩放

1. Create ImageView as large as you want than put image into it without scaling

ImageView.setScaleType(ImageView.ScaleType.CENTER).

强力方法：创建新的更大的PNG，有中心的原始图像和它的其余部分是透明的。

Brute force approach: create new larger png that has original image centered and the rest of it is transparent.

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