Android 不修改源码文件，如何替换apk包的ICON？使用java方法对图像进行缩放处理，生成不同屏幕尺寸的ICON再进行合并

    
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    /**
     * @param srcImage 源图像文件
     * @param target   缩放后的图像路径
     * @param width    缩放后的宽度
     * @param height   缩放后的高度
     */
    public final static void scaleByWidthHeight(File srcImage, String target, int width, int height) {
        try {
            BufferedImage img = ImageIO.read(srcImage);
            Image _img = img.getScaledInstance(width, height, Image.SCALE_DEFAULT);
            BufferedImage image = new BufferedImage(width, height, BufferedImage.TRANSLUCENT);
            Graphics2D graphics = image.createGraphics();
            graphics.drawImage(_img, 0, 0, null);
            graphics.dispose();
            OutputStream out = new FileOutputStream(target);
            ImageIO.write(image, "png", out);
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }