convert byte array to string, string can't convert back after transfer

Question

Code for the same:

public byte[] stringToBytesUTFCustom(String str) {
    char[] buffer1 = str.toCharArray();
    byte[] b = new byte[buffer1.length << 1];
    for(int i = 0; i < buffer1.length; i++) {
        int bpos = i << 1;
        b[bpos] = (byte) ((buffer1[i]&0xFF00)>>8);
        b[bpos + 1] = (byte) (buffer1[i]&0x00FF);
    }
    return b;
}
public String bytesToStringUTFCustom(byte[] bytes) {
    char[] buffer = new char[bytes.length >> 1];
    for(int i = 0; i < buffer.length; i++) {
        int bpos = i << 1;
        char c = (char)(((bytes[bpos]&0x00FF)<<8) + (bytes[bpos+1]&0x00FF));
        buffer[i] = c;
    }
    String txt = String.valueOf(buffer);
    //return new String(buffer);
    return txt;
}

First, I implement a SMS encryption app (Client to Client) and then want to encode cipher(format "Byte[]") to string, Base64 it's work but can't send because more than 160 character. I'm want to convert byte array to string ,when use function above it's work for same function, but when I use bytesToStringUTFCustom and then send this text(SMS) can't work. Receiver cannot read a text to decode from.

Cipher is a result of bytesToStringUTFCustom function, so anyone can help me? Thanks.

Martijn Courteaux · Accepted Answer · 2013-11-20 09:17:55Z

3

Did you know these:

You can use Charset.forName(String) to get the Charset.

Charset UTF8 = Charset.forName("UTF-8");
byte[] bytes = str.getBytes(UTF8);
String reverted = new String(bytes, UTF8);

answered Nov 20, 2013 at 9:17

Martijn Courteaux

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1 Comment

user207421 Over a year ago

Exactly. Why roll your own?

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