Take a color as input, multiply each of the rgb components and return the new color that results from this. - Android Graphics

Android examples for Graphics:Color RGB Value

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Description

Take a color as input, multiply each of the rgb components and return the new color that results from this.

Demo Code


//package com.java2s;

public class Main {
    /**// w  w  w.  j  ava2 s  . c o  m
     * Max value for the alpha channel in 32 bit argb. Used for bit
     * manipulations of the colors.
     */
    public static final int ALPHA_MASK = 0xff000000;
    /**
     * Max value for the red channel in 32 bit argb. Used for bit manipulations
     * of the colors.
     */
    public static final int RED_MASK = 0xff0000;
    /**
     * Max value for the green channel in 32 bit argb. Used for bit
     * manipulations of the colors.
     */
    public static final int GREEN_MASK = 0xff00;
    /**
     * Max value for the blue channel in 32 bit argb. Used for bit manipulations
     * of the colors.
     */
    public static final int BLUE_MASK = 0xff;

    /**
     * Take a color as input, multiply each of the rgb components by
     * mSecondaryColorStrength and return the new color that results from this.
     *
     * @param color                  the primary color to pick rgb values from.
     * @param secondaryColorStrength controls how much of the Primary color is
     *                               left in the Secondary color.
     * @return the secondary color.
     */
    public static int getSecondaryColorFromPrimaryColor(int color,
            double secondaryColorStrength) {
        // Retain the alpha channel
        return ((color & ALPHA_MASK)
                + ((int) ((color & RED_MASK) * secondaryColorStrength) & RED_MASK)
                + ((int) ((color & GREEN_MASK) * secondaryColorStrength) & GREEN_MASK) + ((int) ((color & BLUE_MASK) * secondaryColorStrength) & BLUE_MASK));
    }
}

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