Java tutorial
//package com.java2s; //License from project: Open Source License import android.graphics.Color; public class Main { public static final int TRANSPARENT = 0; /** * Returns a darker version of the specified color. Returns a translucent gray for transparent colors. */ private static int darkenColor(int color) { if (color == TRANSPARENT) { return Color.argb(127, 127, 127, 127); } return Color.rgb(Color.red(color) * 192 / 256, Color.green(color) * 192 / 256, Color.blue(color) * 192 / 256); } }