Android Color Darker isColorDark(final int color)

Description

Calculate whether a color is light or dark, based on a commonly known brightness formula.

License

Apache License

Declaration

public static final boolean isColorDark(final int color) 

Method Source Code

//package com.java2s;
/*/*from w  w  w.j a  v a  2  s .c om*/
 * Copyright (C) 2012 Andrew Neal 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.
 */

import android.graphics.Color;

public class Main {
    /**
     * The threshold used calculate if a color is light or dark
     */
    private static final int BRIGHTNESS_THRESHOLD = 130;

    /**
     * Calculate whether a color is light or dark, based on a commonly known
     * brightness formula.
     * 
     * @see {@literal http://en.wikipedia.org/wiki/HSV_color_space%23Lightness}
     */
    public static final boolean isColorDark(final int color) {
        return (30 * Color.red(color) + 59 * Color.green(color) + 11 * Color
                .blue(color)) / 100 <= BRIGHTNESS_THRESHOLD;
    }
}

Related

1. getDarker(int colour)