/// <summary>
/// The actual read thread
/// </summary>
/// <param name="service">Service instance to access public members</param>
public void ReadProc(object service)
{
int byteRead; // We read one byte at a time
bool twoByteFlag = false; // Set if we've read the first byte of a two-byte sequence
int secondByte = 0; // The second byte of the sequence (may denoted device type)
Message msg;
serviceContext = (RemoteCommunicationService)service;
try
{
while ((byteRead = inputStream.ReadByte()) >= 0)
{
AppLog.Log("RCS-ReadProc; reading: " + byteRead.ToString());
switch (serviceContext.serviceState)
{
case AppConst.ActivityState.idle: // We shouldn't actually get here as the read thread should only be started in connected state
serviceContext.lastReport = 0;
twoByteFlag = false;
break;
case AppConst.ActivityState.connected:
if (twoByteFlag) // We are connected, but the handshake is in progress. Check if we're reading the second byte of a sequence
{
secondByte = byteRead;
twoByteFlag = false;
if (secondByte < 128)
{
UpdateState(AppConst.ActivityState.synced);
serviceContext.lastReport = 0;
}
break;
}
if (byteRead < 127) // As soon as we have a byte with the top bit clear, the handshake is complete (may occur immediately on reconnecting to device)
{
UpdateState(AppConst.ActivityState.synced);
serviceContext.lastReport = 0;
twoByteFlag = false;
}
else if (byteRead == 128) // If we've received a byte with the top bit set, send "key up" message to handshake the recorder
{
twoByteFlag = true;
msg = serviceContext.handler.ObtainMessage();
msg.What = (int)AppConst.MsgPrio.low;
msg.Data.PutString(BundleConst.bundleCmdTag, BundleConst.cmdSend);
msg.Data.PutByteArray(BundleConst.bundleDataTag, promptSequence);
serviceContext.handler.SendMessage(msg);
}
break;
case AppConst.ActivityState.synced: // If top bit set, the handshake has been lost (eg bluetooth device has been unplugged from recorder)
if (byteRead > 127)
{
UpdateState(AppConst.ActivityState.connected);
twoByteFlag = true;
}
else
{
twoByteFlag = false;
if (serviceContext.lastReport != byteRead)
{
SendData(byteRead);
}
serviceContext.lastReport = byteRead;
}
break;
}
}
}
// Most likely called when the other thread closes the bluetooth socket on disconnecting
catch (Throwable e)
{
AppLog.Log("RCS-ReadProc; exception: " + e.ToString());
try
{
inputStream.Close();
}
catch (Throwable)
{
AppLog.Log("RCS-ReadProc; stream close exception: " + e.ToString());
}
}
}
/// <summary>
/// Constructor for ServiceHandler
/// </summary>
/// <param name="looper">The associated looper which the base class needs</param>
/// <param name="serviceContext">The instance for the service so we can access non-static members</param>
public ServiceHandler(Looper looper, RemoteCommunicationService serviceContext) : base(looper)
{
this.serviceContext = serviceContext;
}
