get Color Brightness - Android Graphics

Android examples for Graphics:Color Brighten

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Description

get Color Brightness

Demo Code

/*/*  www  .j  av a  2s .  c  o  m*/
 * Copyright (C) 2013 Robert Ryan Brown
 *
 * 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 {
    public static float getBrightness(int color) {
        float red = Color.red(color) / 255f;
        float blue = Color.blue(color) / 255f;
        float green = Color.green(color) / 255f;

        float brightest_of_blue_and_red = blue > red ? blue : red;
        float dimmest_of_blue_and_red = blue < red ? blue : red;
        float brightest = green > (brightest_of_blue_and_red) ? green
                : brightest_of_blue_and_red;
        float dimmest = green < dimmest_of_blue_and_red ? green
                : dimmest_of_blue_and_red;

        return ((brightest + dimmest) / 2f);
    }
}

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