@ColorInt
    public static int applyAlpha(float alpha, int inputColor) {
        alpha *= Color.alpha(inputColor);
        return Color.argb((int) (alpha), Color.red(inputColor), Color.green(inputColor),
                Color.blue(inputColor));
    }
This method converts device specific pixels to density independent pixels.

@param px      A value in px (pixels) unit. Which we need to convert into db
@param context Context to get resources and device specific display metrics
@return A float value to represent dp equivalent to px value
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/util/ResUtils.java