calculate color from pixel buffer in RGBX_8888 mode

averagecolor.java

                final int limit = buffer.limit();
                final int pixels = limit / 4;
                long red = 0;
                long green = 0;
                long blue = 0;

                for(int i=0;i<limit;i+=4) {
                    int color = buffer.getInt(i);
                    red     += 0xFF & color;
                    green   += 0x00FF & (color >> 8);
                    blue    += 0x0000FF & (color >> 16);
                }

                int avgRed = (int) (red / pixels);
                int avgGreen = (int)(green / pixels);
                int avgBlue = (int) (blue / pixels);

                Log.d("BLS", String.format(Locale.ENGLISH, "0x%s",
                        Integer.toHexString(avgRed << 16 | avgGreen << 8 | avgBlue)));