Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright 2015-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *     http://aws.amazon.com/apache2.0/
 *
 * or in the "license" file accompanying this file. This file 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.Bitmap;
import android.graphics.Canvas;

import android.graphics.PorterDuff;

public class Main {
    /**
     * This method updates the opacity of the bitmap.
     *
     * @param bitmap  The bitmap.
     * @param opacity The value of alpha.
     * @return The bitmap after adjusting the opacity.
     */
    public static Bitmap adjustOpacity(Bitmap bitmap, int opacity) {

        Bitmap mutableBitmap = bitmap.isMutable() ? bitmap : bitmap.copy(Bitmap.Config.ARGB_8888, true);
        Canvas canvas = new Canvas(mutableBitmap);
        int color = (opacity & 0xFF) << 24;
        canvas.drawColor(color, PorterDuff.Mode.DST_IN);
        return mutableBitmap;
    }
}