XBitmapUtils.java 文件源码

/**
 * 合并Bitmap
 *
 * @param bgd 背景Bitmap
 * @param fg  前景Bitmap
 * @return 合成后的Bitmap
 */
public static Bitmap combineImages(Bitmap bgd, Bitmap fg) {
    Bitmap bmp;

    int width = bgd.getWidth() > fg.getWidth() ? bgd.getWidth() : fg
            .getWidth();
    int height = bgd.getHeight() > fg.getHeight() ? bgd.getHeight() : fg
            .getHeight();

    bmp = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    Paint paint = new Paint();
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_ATOP));

    Canvas canvas = new Canvas(bmp);
    canvas.drawBitmap(bgd, 0, 0, null);
    canvas.drawBitmap(fg, 0, 0, paint);

    return bmp;
}