Create a color integer value with specified alpha. - Android Graphics

Android examples for Graphics:Color Value

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Description

Create a color integer value with specified alpha.

Demo Code

/*//  www. j a va 2s . c  o  m
 * Copyright 2014 Soichiro Kashima
 *
 * 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;

public class Main {
    /**
     * Create a color integer value with specified alpha.
     * <p>This may be useful to change alpha value of background color.</p>
     *
     * @param alpha     Alpha value from 0.0f to 1.0f.
     * @param baseColor Base color. alpha value will be ignored.
     * @return A color with alpha made from base color.
     */
    public static int getColorWithAlpha(float alpha, int baseColor) {
        int a = Math.min(255, Math.max(0, (int) (alpha * 255))) << 24;
        int rgb = 0x00ffffff & baseColor;
        return a + rgb;
    }
}

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