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在Android ImageView中放置角落的选项

[英]Options to put corners in Android ImageView

原文 2014-04-04 15:27:23 2 1 java/ android/ android-imageview

I'm trying to put corners im my ImageView and I find these "workarounds": 我试图在我的ImageView上摆个弯角，发现这些“变通办法”：

1 - Take the Bitmap soure and paint then 1-提取位图并绘画

2 - put a second ImageView on my layout and use shape+corners as its source 2-在我的布局上放置第二个ImageView并使用shape + corners作为其来源

It's not possible take the image view and put a corner around then? 不可能将图像视图放在一个角落然后呢？

In my app i have a List with a lot of ImageView (the Bitmap used in this ImageView's is programmatically) and I want to put corners in every ImageView. 在我的应用程序中，我有一个包含很多ImageView的列表（此ImageView中使用的位图是通过编程方式生成的），并且我想在每个ImageView中添加一些角点。

There is any other option? 还有其他选择吗？

1 个解决方案

You can create a selector that contains shape with rounded corners, and then apply it as the ImageView 's background using xml. 您可以创建一个包含圆角shape的selector ，然后使用xml将其应用为ImageView的背景。

Look at this answers here 在这里看这个答案

You can also do it via code by using PorterDuffXfermode . 您也可以使用PorterDuffXfermode通过代码来PorterDuffXfermode 。 PorterDuffXfermode uses alpha compositing that will allow you to create and intersection (things of mathematical sets here) between the Canvas you get from onDraw() and an off screen Canvas you will have to create. PorterDuffXfermode使用Alpha合成，可让您在从onDraw()获得的Canvas与将要创建的屏幕外Canvas之间创建和相交（此处为数学集合的事物）。 You will use one of the PorterDuff.Mode flags to tell the framework you want to only render the pixels that intersect from the two Bitmaps in each Canvas . 您将使用PorterDuff.Mode标志之一来告诉框架您只想渲染与每个Canvas的两个Bitmaps相交的像素。