Android Socket - Memory Leak - Incoming message

first question here and I hope that you can help me :)

The code (below) is some code that was written a while back which listens for incoming packets on an open socket. The code works well and manages to listen to all incoming messages, however the problem seems to be with this function below. It seems like this code is always being run, which is causing it to use large amounts of CPU power and large amounts of RAM. I am unable to show much more code as there is lots of it. Just wondering if there is a better way of knowing that a packet has arrived. Here is the code:

**

{
    if (socket.getInputStream() != null)
    {
        if (socket.getInputStream().available() > 0)
        {
            int i = socket.getInputStream().available();
            byte[] buffer = new byte[Global.c_iRxArraySize];
            socket.getInputStream().read(buffer);

            short[] converted = new short[Global.c_iRxArraySize];
            for (int j = 0; j < i; j++)
            {
                converted[j] = (short) (buffer[j] & 0xff);
            }
            Global.sNoTransmittionRecievedTimeout = 0;

            p_DebugreceivedMessageSize = FindPacketSize(converted);
            p_DebugreceivedMessageCount = p_DebugreceivedMessageCount + 1;
            p_DebugreceivedMessageData = GetPacketContents(converted);

            Date date = new Date();
            SimpleDateFormat p_DebugreceivedMessageTime = new SimpleDateFormat("MM/dd/yyyy h:mm:ss a");
            DateReceivedData = p_DebugreceivedMessageTime.format(date);

            List<String> DataListReceived = new ArrayList<String>();
            DataListReceived.add(Arrays.toString(p_DebugreceivedMessageData));

            MobileRxProtocol(converted);
            Global.p_ReconnectionTimer = 0;
        }
    }