我有一个蓝牙发射器试图连接到我写的基于BluetoothChat（android示例API）的服务。
一旦我运行命令mAdapter.listenUsingInsecureRfcommWithServiceRecord(NAME, MY_UUID)，蓝牙就会自动连接（在accept();命令之前，从而使接受阻止流程）。任何想法？
我的猜测是有一个套接字在之前的运行中没有正确关闭 - 尽管在这方面的调试没有显示出任何有趣的东西。
代码：
public class BluetoothService extends Service {
// Unique UUID for this application
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
@Override
public void onCreate() {
mAdapter = BluetoothAdapter.getDefaultAdapter();
if (mAdapter == null) {
Log.e(TAG, "Bluetooth is not available");
stopSelf();
return;
}
mState = STATE_NONE;
}
@Override
public int onStartCommand(Intent BluetoothService, int flags, int startId ) {
/**
* Start the chat service. Specifically start AcceptThread to begin a
* session in listening (server) mode. Called by the Activity onResume() */
if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;}
// Start the thread to listen on a BluetoothServerSocket
if (mAcceptThread == null) {
mAcceptThread = new AcceptThread();
mAcceptThread.start();
}
setState(STATE_LISTEN);
return START_NOT_STICKY;
}
/**
* This thread runs while listening for incoming connections. It behaves
* like a server-side client. It runs until a connection is accepted
* (or until cancelled).
*/
private class AcceptThread extends Thread
{
// The local server socket
private BluetoothServerSocket mmServerSocket = null;
public AcceptThread()
{
BluetoothServerSocket tmp = null;
// Create a new listening server socket
try
{
//mmServerSocket = mAdapter.listenUsingInsecureRfcommWithServiceRecord(NAME, MY_UUID);
tmp= mAdapter.listenUsingInsecureRfcommWithServiceRecord(NAME, MY_UUID);
}
catch (IOException e)
{
e.printStackTrace();
stopSelf();
}
mmServerSocket = tmp;
}
public void run() {
setName("AcceptThread");
socket = null;
// Listen to the server socket if we're not connected
while (mState != STATE_CONNECTED) {
try {
// This is a blocking call and will only return on a
// successful connection or an exception
if (socket==null)
socket = mmServerSocket.accept();
} catch (IOException e) {
break;
}
// If a connection was accepted
if (socket != null) {
synchronized (BluetoothService.this) {
switch (mState) {
case STATE_LISTEN:
// Situation normal. Start the connected thread.
connected(socket, socket.getRemoteDevice());
break;
case STATE_NONE:
case STATE_CONNECTED:
// Either not ready or already connected. Terminate new socket.
try {
socket.close();
} catch (IOException e) {
}
break;
}
}
}
}
}
public void cancel()
{
try {
if(mmServerSocket!=null) mmServerSocket.close();
} catch (IOException e) {
Log.e(TAG, "close() of server failed", e);
}
}
}
/**
* Indicate that the connection was lost and notify the UI Activity.
*/
private void connectionLost() {
setState(STATE_LISTEN);
// Start the service over to restart listening mode
// Start the thread to listen on a BluetoothServerSocket
if (mAcceptThread == null) {
mAcceptThread = new AcceptThread();
mAcceptThread.start();
}
}
/**
* This thread runs during a connection with a remote device.
* It handles all incoming and outgoing transmissions.
*/
private class ConnectedThread extends Thread {
public ConnectedThread(BluetoothSocket socket) {
Log.d(TAG, "create ConnectedThread");
InputStream tmpIn = null;
OutputStream tmpOut = null;
tabulkaBluetooth=socket.getRemoteDevice();
tabulkaMac=tabulkaBluetooth.getAddress(); //MAC address of the tabulka to be used as ID at the server
// We need an Editor object to make preference changes.
// All objects are from android.context.Context
// editor.commit();
// Get the BluetoothSocket input and output streams
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) {
Log.e(TAG, "temp sockets not created", e);
}
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
Log.i(TAG, "BEGIN mConnectedThread");
int bytes;
String coordinates = ""; //new coordinates from the tabulka
String newCoordinates=null;
byte[] buffer = new byte[1024];
// Keep listening to the InputStream while connected
int inputStreamAviableBool=0; //0- not aviable 1-aviable
//---------diagnostic msg
byte[] sendBuffer = new byte[3];
sendBuffer[0] = 0x0a;
sendBuffer[1] = 1;
sendBuffer[2] = 'A';
try {
mmOutStream.write(sendBuffer);
} catch (IOException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
//---------end of diagnostic msg
SystemClock.sleep(1000) ;
int numOfInputReads=1;
while(numOfInputReads<3)
{
try {
inputStreamAviableBool=mmInStream.available();
} catch (IOException e1) {
Log.e(TAG, "checking availability of inputStream IOException:", e1);
}
while(inputStreamAviableBool!=0 ){
try{
bytes = mmInStream.read(buffer);
if(bytes == -1)
Log.e(TAG, "input stream is over");
} catch (IOException e) {
Log.e(TAG, "reading from inputStream IOException:", e);
}
newCoordinates = new String(buffer);
coordinates=coordinates+newCoordinates;
try {
numOfInputReads++;
SystemClock.sleep(2000) ;
mmOutStream.write(sendBuffer);
} catch (IOException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
try {
inputStreamAviableBool=mmInStream.available();
} catch (IOException e1) {
Log.e(TAG, "checking availability of inputStream IOException:", e1);
}
if(inputStreamAviableBool>=3) inputStreamAviableBool=0;
}
numOfInputReads++;
SystemClock.sleep(2000) ;
}
disconnect();
connectionLost();
stopSelf();
//-------end--------debuging
}
public void cancel() {
try {
// if(mmSocket!=null) mmSocket.close();
if(socket!=null) socket.close();
} catch (IOException e) {
Log.e(TAG, "close() of connect socket failed", e);
}
}
private void disconnect() {
Log.d(TAG, "closing");
if (mmInStream != null) {
try {
mmInStream.close();
} catch (IOException e) {
Log.e(TAG, "isBt IOE", e);
}
mmInStream = null;
}
if (mmOutStream != null) {
try {
mmOutStream.close();
} catch (IOException e) {
Log.e(TAG, "isBt IOE", e);
}
mmOutStream = null;
}
if (socket != null) {
try{
socket.close();
}
catch (IOException e) {
Log.e(TAG, "socket haven't been close", e);
}
socket = null;
}
Log.d(TAG, "closed");
}
}
/**
* Start the ConnectedThread to begin managing a Bluetooth connection
* @param socket The BluetoothSocket on which the connection was made
* @param device The BluetoothDevice that has been connected
*/
public synchronized void connected(BluetoothSocket socket, BluetoothDevice device) {
if (D) Log.d(TAG, "connected");
// Cancel any thread currently running a connection
if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;}
// Cancel the accept thread because we only want to connect to one device
if (mAcceptThread != null) {mAcceptThread.cancel(); mAcceptThread = null;}
// Start the thread to manage the connection and perform transmissions
mConnectedThread = new ConnectedThread(socket);
mConnectedThread.start();
setState(STATE_CONNECTED);
}
}