Calculates the luminosity of a color - Android Graphics

Android examples for Graphics:Color Operation

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Description

Calculates the luminosity of a color

Demo Code

/*//from  www  .j a  v  a  2 s. c o m
 * Copyright (C) 2010 Gandulf Kohlweiss
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;
import android.graphics.Color;

public class Main {
    /**
     * Calculates the luminosity of a color
     * 
     * @param color
     * @return int luminosity [0..255]
     */
    public static int luminosity(int color) {
        return (int) (0.299 * Color.red(color) + 0.587 * Color.green(color) + 0.114 * Color
                .blue(color));
    }
}

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