java - 在 Android 中以编程方式添加图像 WaterMark

Question

我正在尝试为另一张图片添加图片水印。我有以下代码，但我遇到了问题。我不知道这个 'Resources res' 是什么。

有人能帮忙吗？

public static Bitmap addWatermark(Resources res, Bitmap source)
{
     int w, h;
     Canvas c;
     Paint paint;
     Bitmap bmp, watermark;

     Matrix matrix;
     float scale;
     RectF r;

     w = source.getWidth();
     h = source.getHeight();


    bmp = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);

    paint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG |Paint.FILTER_BITMAP_FLAG);         


    c = new Canvas(bmp);
    c.drawBitmap(source, 0, 0, paint);

    watermark = BitmapFactory.decodeResource(res, R.drawable.android_mo);
    scale = (float) (((float) h * 0.10) / (float) watermark.getHeight());

    matrix = new Matrix();
    matrix.postScale(scale, scale);
    r = new RectF(0, 0, watermark.getWidth(), watermark.getHeight());
    matrix.mapRect(r);
    matrix.postTranslate(w - r.width(), h - r.height());

    c.drawBitmap(watermark, matrix, paint);
    watermark.recycle();

    return bmp;
}

Answer 1

这是您可以通过 activity.getResources() 或 fragment.getResources()

获得的 Resource 对象