如何使用 RoundedBitmapDrawable [英] How to use RoundedBitmapDrawable

问题描述

有人使用过 RoundedBitmapDrawable 吗?如果我错了，请纠正我，但据我所知，它从常规矩形图像生成圆形图像.

Has anyone managed to use RoundedBitmapDrawable? Correct me if I'm wrong, but to my understanding, it makes a circular image from a regular rectangular image.

到目前为止我尝试过的是这个

What I've tried so far is this

RoundedBitmapDrawable.createRoundedBitmapDrawable(getResources(), BitmapFactory.decodeResource(getResources(), iconResource))

我试图实现的目标:将任何图像转换为圆形图像并使用 ImageView 显示它.

What I tried to achieve: transform any image to a circular image and show it using an ImageView.

万一我把事情搞混了，我说的都是胡说八道.是否有可能(或更简单)使用任何新框架来做到这一点?(Android L 或新的支持库)

In case I mixed things up and all that I said is non-sense. Is it possible (or simpler) to do it with any of the new framework? (Android L or new Support Library)

推荐答案

需要设置圆角半径.

Resources res = getResources();
Bitmap src = BitmapFactory.decodeResource(res, iconResource);
RoundedBitmapDrawable dr =
    RoundedBitmapDrawableFactory.create(res, src);
dr.setCornerRadius(Math.max(src.getWidth(), src.getHeight()) / 2.0f);
imageView.setImageDrawable(dr);

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