BitmapUtil.java 文件源码

/**
 * 根据自定义的弧度生成一张圆角图片 . <br>
 * @author liulongzhenhai 2012-7-12 上午9:06:01 <br>
 * @param bitmap 图片
 * @param pixels 圆角
 * @return 图片
 */
public static Bitmap toRoundCorner(final Bitmap bitmap, final int pixels) {
    final Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
    final 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 = pixels;

    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);
    canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

    paint.setXfermode(new PorterDuffXfermode(android.graphics.PorterDuff.Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint);
    return output;
}