Interpret a byte stream from a Bluetooth-device

Question

Hi
I'm having a problem with interpreting an InputStream from my Bluetooth device. I'm developing an application on SE P900, J2ME MIDP2.0/CLDC 1.0.
Example:
while((read = is.read(byteArray)) != -1) {
   receivedData = new StringBuffer();
   log("Read:  " + read + "bytes");
   for(int i = 0; i <= read; i++) {
      byte tmp = (byteArray);
receivedData.append(tmp);
log(receivedData.toString());
log("Finish :)"); //This is never printet. read is never -1..
//The result of my app in P900:
//Read 2 bytes
//3100
//Read 2 bytes
//0310
The bytestream I get from the bluetooth-device looks something like this:
byte 0: header
byte 1: MSB
byte 2: LSB
byte 3: CRC
I need to find out how I can interpret the inputStream correctly! It is possible that my output is wrong, so that the input is incomplete. But it'd be much easier if I could read the InputStream correct
I've also tried to use the InputStreamReader, since it converts bytes to unicode, but that wont work. Have got a few examples on that, but in J2ME the BufferedReader doesn't exists so I cant it out
Haavard

Answer 1

simple:
byte header = Datain.readByte();
short length = Datain.readUnsignedShort();
byte[] IDinBytes = new Byte[length];
Datain.readFully(IDinBytes );
String ID = New String(IDinBytes );this might also work:
byte header = Datain.readByte();
String ID = Datain.readUTF();but this is really hack, since readUTF() will first read two bytes to indicate the length of the string, and then the string itself. In this case, it works, but in general you should use the first example. Only use readUTF() if you have DataOutputstream on the other side that uses writeUTF(), in all other options, it's more or less a dirty hack ;)