private static int setColorAlpha(int color, byte alpha) {
        return Color.argb(alpha, Color.red(color), Color.green(color), Color.blue(color));
    }
Set the alpha value of the {@code color} to be the given {@code alpha} value.
SwipeRefreshLayoutBasic/Application/src/main/java/com/example/android/common/view/SlidingTabStrip.java