Glide

Glide.with(context).load(list.get(position).getImgsrc())
                .apply(RequestOptions.bitmapTransform(new CircleCrop()))
                .into(holder.img);

Glide.with(this).load(url).apply(RequestOptions.bitmapTransform(new CircleCrop())).into(imageView);  
或者
RequestOptions requestOptions = RequestOptions.circleCropTransform();  
Glide.with(this).load(url).apply(requestOptions).into(imageView); 

//设置图片圆角角度
RoundedCorners roundedCorners= new RoundedCorners(10);
//通过RequestOptions扩展功能,override:采样率,因为ImageView就这么大,可以压缩图片,降低内存消耗
RequestOptions options=RequestOptions.bitmapTransform(roundedCorners);
Glide.with(context).load(url).apply(options).into(image);