Swaps an unsigned value around, and puts the result in an array that can be sent to a device. - Android java.lang

Android examples for java.lang:Array Element

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Description

Swaps an unsigned value around, and puts the result in an array that can be sent to a device.

Demo Code

/*/*from   w  ww.  ja v a 2  s  .  co m*/
 * Copyright (C) 2007 The Android Open Source Project
 *
 * 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 {
    /**
     * Swaps an unsigned value around, and puts the result in an array that can be sent to a device.
     * @param value The value to swap.
     * @param dest the destination array
     * @param offset the offset in the array where to put the swapped value.
     *      Array length must be at least offset + 4
     */
    public static void swap32bitsToArray(int value, byte[] dest, int offset) {
        dest[offset] = (byte) (value & 0x000000FF);
        dest[offset + 1] = (byte) ((value & 0x0000FF00) >> 8);
        dest[offset + 2] = (byte) ((value & 0x00FF0000) >> 16);
        dest[offset + 3] = (byte) ((value & 0xFF000000) >> 24);
    }
}

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