如何将hex文件转换为二进制数组Android,Java

时间:2017-03-02 06:59:10

标签: java android io

我想将字符符号从.hex文件转换为字节数组。我正在使用此代码,但结果与我的文件中的符号不​​同。

我的代码:

    public byte[] getResource(int id, Context context) throws IOException {
    Resources resources = context.getResources();
    InputStream is = resources.openRawResource(id);

    ByteArrayOutputStream bout = new ByteArrayOutputStream();

    byte[] readBuffer = new byte[2 * 1024 * 1024];
    byte[] data;

    try {
        int read;
        do {
            read = is.read(readBuffer, 0, readBuffer.length);
            if (read == -1) {

                break;


            }
            String hex = new String(readBuffer);
            data = hexStringToByteArray(hex);
            bout.write(data);
            //   bout.write(readBuffer, 0, read);
        } while (true);

        return bout.toByteArray();
    } finally {
        is.close();
    }
}

public static byte[] hexStringToByteArray(String s) {
    int len = s.length();
    byte[] data = new byte[len / 2];
    for (int i = 0; i < len; i += 2) {
        data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
                + Character.digit(s.charAt(i + 1), 16));
    }
    return data;
}

我的.hex文件中的前3行

  

:020000040800F2   :20000000103C0020650200081502000817020008190200081B0200081D0200080000000056   :200020000000000000000000000000001F020008210200080000000023020008714A00087C

但是当我检查结果数组时,我看到了这个:  -16,32,0,0,64,-128,15,31,-17,32,0,0,0,16,60,0,32,101,2,0,8,21 ... < / p>

我的错误在哪里?请告诉我正确的方法!

2 个答案:

答案 0 :(得分:1)

首先从文件中读取所有数据并从字符串中删除所有不正确的符号(':'),如@pitfall所说并存储在字符串中然后执行以下操作。

String s="yourStringFromFile";
byte[] b = new BigInteger(s,16).toByteArray();

答案 1 :(得分:0)

您应该从十六进制字符串中删除所有不正确的符号(例如&#39;:&#39;)。

hexStringToByteArray(&#34;:020000040800F&#34;) - &gt; [-16,32,0,0,64,-128,15] hexStringToByteArray(&#34; 020000040800F2&#34;) - &gt; [2,0,0,4,8,0,-14]