Blends the two provided colors according to the ratio - Android Graphics

Android examples for Graphics:Color

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Description

Blends the two provided colors according to the ratio

Demo Code


//package com.java2s;
import android.graphics.Color;

public class Main {
    /**/*from  w w  w .j a  v a2  s . com*/
     * Blends the two provided colors according to the ratio
     *
     * @param color1 first color to blend
     * @param color2 second color to blend
     * @param ratio  ratio to blend colors. 0.0f results in color1, 1.0f results in color2
     * @return
     */
    public static int blendColors(int color1, int color2, float ratio) {

        float proportion = ratio;

        proportion = Math.min(1.0f, proportion);
        proportion = Math.max(0.0f, proportion);

        int[] color1Comps = { Color.alpha(color1), Color.red(color1),
                Color.green(color1), Color.blue(color1) };
        int[] color2Comps = { Color.alpha(color2), Color.red(color2),
                Color.green(color2), Color.blue(color2) };
        int[] newColorComps = { 0, 0, 0, 0 };

        for (int i = 0; i < 4; i++) {
            newColorComps[i] = Math.round(color1Comps[i]
                    + ((color2Comps[i] - color1Comps[i]) * proportion));
        }

        return Color.argb(newColorComps[0], newColorComps[1],
                newColorComps[2], newColorComps[3]);
    }
}

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