Bitmap图片处理成圆角

老仙儿

于 2023-06-29 09:00:38 发布

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文章标签： android

本文链接：https://blog.youkuaiyun.com/tianhongfan10106/article/details/131449104

版权

该代码段定义了一个静态方法，用于将常规Bitmap转换为具有指定圆角的Bitmap。它使用Canvas和Paint对象在新Bitmap上绘制一个圆角矩形，然后应用PorterDuffXfermode模式将原始Bitmap内容融合到圆角背景中。

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public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
final float roundPx = 12;
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}