Android Byte Array to Int Convert swap32bitFromArray(byte[] value, int offset)

Description

Reads a signed 32 bit integer from an array coming from a device.

License

Apache License

Parameter

Parameter	Description
value	the array containing the int
offset	the offset in the array at which the int starts

Return

the integer read from the array

Declaration

public static int swap32bitFromArray(byte[] value, int offset) 

Method Source Code

//package com.java2s;
/*/* ww w  .j  a v a 2  s .  c om*/
 * 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.
 */

public class Main {
    /**
     * Reads a signed 32 bit integer from an array coming from a device.
     * @param value the array containing the int
     * @param offset the offset in the array at which the int starts
     * @return the integer read from the array
     */
    public static int swap32bitFromArray(byte[] value, int offset) {
        int v = 0;
        v |= ((int) value[offset]) & 0x000000FF;
        v |= (((int) value[offset + 1]) & 0x000000FF) << 8;
        v |= (((int) value[offset + 2]) & 0x000000FF) << 16;
        v |= (((int) value[offset + 3]) & 0x000000FF) << 24;

        return v;
    }
}

Related

1. BytesToInt(byte[] value)
2. bytesToInt(byte[] bytes)
3. bytesToInt(byte[] bytes)
4. bytesToInt(byte[] bytes, int offset)
5. swap32bitsToArray(int value, byte[] dest, int offset)
6. swapU16bitFromArray(byte[] value, int offset)
7. toInt(byte[] in)
8. parseInt(byte[] b, int start, int end, int radix)