我试图用蓝牙连接两部手机（galaxy note1，galaxy note2），但套接字连接失败。
这是我的LogCat：
I/BluetoothService(24036): BEGIN mConnectThread
D/BluetoothUtils(24036): isSocketAllowedBySecurityPolicy start : device null
D/BluetoothService(24036): setState() 2 -> 1
D/BluetoothService(24036): Connect Fail
D/BluetoothService(24036): start
V/BluetoothSocket.cpp(24036): abortNative
V/BluetoothSocket.cpp(24036): ...asocket_abort(56) complete
V/BluetoothSocket.cpp(24036): destroyNative
V/BluetoothSocket.cpp(24036): ...asocket_destroy(56) complete
D/BluetoothUtils(24036): isSocketAllowedBySecurityPolicy start : device null
D/BluetoothService(24036): setState() 1 -> 1
D/BluetoothService(24036): Connect Fail
D/BluetoothService(24036): start
我不知道为什么连接失败＆＃39;发生了。
isSocketAllowedBySecurityPolicy start：device null＆＃39;有问题吗？或蓝牙uuid不正确？
你能告诉我这是什么问题以及如何解决这个问题吗？
我还添加了关于bluetoothservice part
的src代码public class BluetoothService {
// Debugging
private static final String TAG = "BluetoothService";
// Intent request code
private static final int REQUEST_CONNECT_DEVICE = 1;
private static final int REQUEST_ENABLE_BT = 2;
// RFCOMM Protocol
private static final UUID MY_UUID = UUID
.fromString("8ce255c0-200a-11e0-ac64-0800200c9a66");
private BluetoothAdapter btAdapter;
private Activity mActivity;
private Handler mHandler;
private ConnectThread mConnectThread;
private ConnectedThread mConnectedThread;
private int mState;
private static final int STATE_NONE = 0; // we're doing nothing
private static final int STATE_LISTEN = 1; // now listening for incoming
// connections
private static final int STATE_CONNECTING = 2; // now initiating an outgoing
// connection
private static final int STATE_CONNECTED = 3; // now connected to a remote
// device
// Constructors
public BluetoothService(Activity ac, Handler h) {
mActivity = ac;
mHandler = h;
btAdapter = BluetoothAdapter.getDefaultAdapter();
}
/**
* Check the Bluetooth support
*
* @return boolean
*/
public boolean getDeviceState() {
Log.i(TAG, "Check the Bluetooth support");
if (btAdapter == null) {
Log.d(TAG, "Bluetooth is not available");
return false;
} else {
Log.d(TAG, "Bluetooth is available");
return true;
}
}
/**
* Check the enabled Bluetooth
*/
public void enableBluetooth() {
Log.i(TAG, "Check the enabled Bluetooth");
if (btAdapter.isEnabled()) {
Log.d(TAG, "Bluetooth Enable Now");
// Next Step
scanDevice();
} else {
Log.d(TAG, "Bluetooth Enable Request");
Intent i = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
mActivity.startActivityForResult(i, REQUEST_ENABLE_BT);
}
}
/**
* Available device search
*/
public void scanDevice() {
Log.d(TAG, "Scan Device");
Intent serverIntent = new Intent(mActivity, DeviceListActivity.class);
mActivity.startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE);
}
/**
* after scanning and get device info
*
* @param data
*/
public void getDeviceInfo(Intent data) {
// Get the device MAC address
String address = data.getExtras().getString(
DeviceListActivity.EXTRA_DEVICE_ADDRESS);
// Get the BluetoothDevice object
// BluetoothDevice device = btAdapter.getRemoteDevice(address);
BluetoothDevice device = btAdapter.getRemoteDevice(address);
Log.d(TAG, "Get Device Info \n" + "address : " + address);
connect(device);
}
private synchronized void setState(int state) {
Log.d(TAG, "setState() " + mState + " -> " + state);
mState = state;
}
public synchronized int getState() {
return mState;
}
public synchronized void start() {
Log.d(TAG, "start");
// Cancel any thread attempting to make a connection
if (mConnectThread == null) {
} else {
mConnectThread.cancel();
mConnectThread = null;
}
// Cancel any thread currently running a connection
if (mConnectedThread == null) {
} else {
mConnectedThread.cancel();
mConnectedThread = null;
}
}
public synchronized void connect(BluetoothDevice device) {
Log.d(TAG, "connect to: " + device);
// Cancel any thread attempting to make a connection
if (mState == STATE_CONNECTING) {
if (mConnectThread == null) {
} else {
mConnectThread.cancel();
mConnectThread = null;
}
}
// Cancel any thread currently running a connection
if (mConnectedThread == null) {
} else {
mConnectedThread.cancel();
mConnectedThread = null;
}
// Start the thread to connect with the given device
mConnectThread = new ConnectThread(device);
mConnectThread.start();
setState(STATE_CONNECTING);
}
// ConnectedThread
public synchronized void connected(BluetoothSocket socket,
BluetoothDevice device) {
Log.d(TAG, "connected");
// Cancel the thread that completed the connection
if (mConnectThread == null) {
} else {
mConnectThread.cancel();
mConnectThread = null;
}
// Cancel any thread currently running a connection
if (mConnectedThread == null) {
} else {
mConnectedThread.cancel();
mConnectedThread = null;
}
// Start the thread to manage the connection and perform transmissions
mConnectedThread = new ConnectedThread(socket);
mConnectedThread.start();
setState(STATE_CONNECTED);
}
// thread stop
public synchronized void stop() {
Log.d(TAG, "stop");
if (mConnectThread != null) {
mConnectThread.cancel();
mConnectThread = null;
}
if (mConnectedThread != null) {
mConnectedThread.cancel();
mConnectedThread = null;
}
setState(STATE_NONE);
}
public void write(byte[] out) { // Create temporary object
ConnectedThread r; // Synchronize a copy of the ConnectedThread
synchronized (this) {
if (mState != STATE_CONNECTED)
return;
r = mConnectedThread;
} // Perform the write unsynchronized r.write(out); }
}
private void connectionFailed() {
setState(STATE_LISTEN);
}
private void connectionLost() {
setState(STATE_LISTEN);
}
private class ConnectThread extends Thread {
private final BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
public ConnectThread(BluetoothDevice device) {
mmDevice = device;
BluetoothSocket tmp = null;
try {
tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
Log.e(TAG, "create() failed", e);
}
mmSocket = tmp;
}
public void run() {
Log.i(TAG, "BEGIN mConnectThread");
setName("ConnectThread");
btAdapter.cancelDiscovery();
try {
mmSocket.connect();
Log.d(TAG, "Connect Success");
} catch (IOException e) {
connectionFailed();
Log.d(TAG, "Connect Fail");
try {
mmSocket.close();
} catch (IOException e2) {
Log.e(TAG,
"unable to close() socket during connection failure",
e2);
}
BluetoothService.this.start();
return;
}
synchronized (BluetoothService.this) {
mConnectThread = null;
}
connected(mmSocket, mmDevice);
}
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
Log.e(TAG, "close() of connect socket failed", e);
}
}
}
private class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket) {
Log.d(TAG, "create ConnectedThread");
mmSocket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;
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");
byte[] buffer = new byte[1024];
int bytes;
// Keep listening to the InputStream while connected
while (true) {
try {
bytes = mmInStream.read(buffer);
} catch (IOException e) {
Log.e(TAG, "disconnected", e);
connectionLost();
break;
}
}
}
/**
* Write to the connected OutStream.
*
* @param buffer
* The bytes to write
*/
public void write(byte[] buffer) {
try {
mmOutStream.write(buffer);
} catch (IOException e) {
Log.e(TAG, "Exception during write", e);
}
}
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
Log.e(TAG, "close() of connect socket failed", e);
}
}
}
}
connectThread发生 connect fail。对不起，这个问题不容易阅读。
答案 0 :(得分：3)
尝试通过以下方式获得正确的UUID：
BluetoothDevice device;
ParcelUuid list[] = device.getUuids();
//use e.g. first list[0]
答案 1 :(得分：0)
deviceUUID = UUID.fromString(list[0].toString());
try {
TheSocket = TheDevice.createRfcommSocketToServiceRecord(deviceUUID);
} catch (IOException e) {
e.printStackTrace();
}