android - 在android中为多个像素更改图像png的颜色？

Question

我的应用程序有一张图片，我需要更改 imageview 墙壁颜色中的每一个墙壁颜色，例如客厅......就像这张图片

how to change image colors for highlights in android?

Answer 1

您必须获取 imageView 位图中特定点的像素 RGB 值。然后您可以从那里设置像素并考虑 alpha，然后翻转您想要更改值的像素。

        BitmapFactory.Options opt = new BitmapFactory.Options();
        opt.inMutable = true;
        opt.inScaled = false;

        Bitmap ico = BitmapFactory.decodeResource(context.getResources(), R.drawable.colored_wall_pic, opt);

        int color = 15132390 & 0x00FFFFFF; //15132390 is like whiteish gray
        for (int x = 0; x < w; x++) {
            for (int y = 0; y < h; y++) {
                int alpha = ico.getPixel(x, y) & 0xFF000000;
                if (alpha != 0) {
                    ico.setPixel(x, y, color | alpha);
                }
            }
        }

        Bitmap icon = Bitmap.createBitmap(ico.getWidth(), ico.getHeight(), ico.getConfig());

        // overlay transparent mutable Bitmap on transparent background
        Canvas canvas = new Canvas(icon);
        canvas.drawBitmap(ico, 0, 0, null);