Java tutorial
//package com.java2s; /******************************************************************************* * Copyright 2012-present Pixate, Inc. * * 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 { /** * Append an alpha value to the given color. * * @param color * @param alpha a 0.0 to a 1.0 alpha value (will be translated to 0-255) * @return The new color value. */ public static int colorWithAlpha(int color, float alpha) { if (alpha < 0f) { alpha = 0f; } else if (alpha > 1f) { alpha = 1f; } return Color.argb((int) (alpha * 255), Color.red(color), Color.green(color), Color.blue(color)); } }