android - 如何在 Android 中为图像添加水印效果？

Question

我有一张带边框的图片，我需要添加水印效果。我该怎么做？

Answer 1

我找到了关于 Android 图像处理的精彩教程 here .

public static Bitmap mark(Bitmap src, String watermark, Point location, Color color, int alpha, int size, boolean underline) {
    int w = src.getWidth();
    int h = src.getHeight();
    Bitmap result = Bitmap.createBitmap(w, h, src.getConfig());

    Canvas canvas = new Canvas(result);
    canvas.drawBitmap(src, 0, 0, null);

    Paint paint = new Paint();
    paint.setColor(color);
    paint.setAlpha(alpha);
    paint.setTextSize(size);
    paint.setAntiAlias(true);
    paint.setUnderlineText(underline);
    canvas.drawText(watermark, location.x, location.y, paint);

    return result;
}

感谢 Pete Houston 分享了有关基本图像处理的有用教程。