Java tutorial
//package com.java2s; //License from project: Open Source License import android.graphics.Color; public class Main { public static int adjustAlpha(int color, @SuppressWarnings("SameParameterValue") float factor) { int alpha = Math.round(Color.alpha(color) * factor); int red = Color.red(color); int green = Color.green(color); int blue = Color.blue(color); return Color.argb(alpha, red, green, blue); } }