将int []转换为bytes [] Java [英] Converting int[] to bytes[] Java

问题描述

我正在尝试将int []转换为字节。它也被转换。

我的转换代码就是这样。

  public static byte [] convertIntoBytes（int [] menuIds）{
 byte [] byteConverted; 
 ByteBuffer byteBuffer = ByteBuffer.allocate（menuIds.length * 4）; 
 IntBuffer intBuffer = byteBuffer.asIntBuffer（）; 
 intBuffer.put（menuIds）; 
 byteConverted = byteBuffer.array（）; 
 for（int i = 0; i< 840; i ++）{
 Log.d（Bytes sfter Insert，+ byteConverted [i]）; 
} 
返回byteConverted; 
} 
  

假设我输入了一个int [] = {10,11,15， 41,12,8,4,23,5,17,23,36,6}
现在我希望字节数组像这样
{10,0,0,0,11,0 ，0,0,15,0,0,0,41,0,0,0,12,0,0,0,8,0,0,0,4,0,0,0,23,0,0 ，0,5,0,0,0,17,0,0,0,23,0,0,0,36,0,0,0,6,0,0,0}

但是字节数组将是

{0,0,0,10,0,0,0,11,0， 0,0,15,0,0,0,41,0,0,0,12,0,0,0,8,0,0,0,4,0,0,0,23,0,0， 0,5,0,0,0,17,0,0,0,23,0,0,0,36,0,0,0,6，}

<实际上我试图让字节数组从第一个位置开始。

解决方案

试试这个

  ... 
 ByteBuffer byteBuffer = ByteBuffer.allocate（menuIds.length * 4）; 
 byteBuffer.order（ByteOrder.LITTLE_ENDIAN）; 
 ... 
  

I am trying to convert an int[] to bytes . It gets converted also.

My code for conversion is this.

public static byte[] convertIntoBytes(int[] menuIds){
    byte[] byteConverted;
    ByteBuffer byteBuffer = ByteBuffer.allocate(menuIds.length * 4);
    IntBuffer intBuffer = byteBuffer.asIntBuffer();
    intBuffer.put(menuIds);
    byteConverted = byteBuffer.array();
    for (int i = 0; i < 840; i++) {
        Log.d("Bytes sfter Insert", ""+byteConverted[i]);
    }
    return byteConverted;
}

Suppose i an inputting an int[] = {10,11,15,41,12,8,4,23,5,17,23,36,6} Now i want the byte array to be like this {10,0,0,0,11,0,0,0,15,0,0,0,41,0,0,0,12,0,0,0,8,0,0,0,4,0,0,0,23,0,0,0,5,0,0,0,17,0,0,0,23,0,0,0,36,0,0,0,6,0,0,0}

But the byte array coming to be is

{0,0,0,10,0,0,0,11,0,0,0,15,0,0,0,41,0,0,0,12,0,0,0,8,0,0,0,4,0,0,0,23,0,0,0,5,0,0,0,17,0,0,0,23,0,0,0,36,0,0,0,6,}

Actually i am trying to get the byte array to be start from first position.

解决方案

try this

...
ByteBuffer byteBuffer = ByteBuffer.allocate(menuIds.length * 4);
byteBuffer.order(ByteOrder.LITTLE_ENDIAN);
...

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