我已经尝试了其他评论中的所有建议但无济于事，我希望有人可以帮助我。我已经为这个问题苦苦挣扎了三天了。我非常确定我的 UUID 是正确的，并且我知道蓝牙访问已在清单中启用。
我正在尝试将我的 Android 应用程序连接到在 Fedora 中运行的 python 服务器。它间歇性地起作用，现在根本不起作用。我收到的 android 异常通常是这样的。这些异常是在 btSocket.connect(); 时抛出的。在下面附加的代码中执行。
12-09 05:08:42.331: ERROR/BluetoothService(676): java.io.IOException: Service discovery failed
or
12-09 05:27:00.757: ERROR/BluetoothService(729): java.io.IOException: Service discovery failed
这是我的 Android 蓝牙类，应该可以处理所有事情。当主应用程序类收到套接字已连接的消息时启动该线程。我的蓝牙课程基于http://www.anddev.org/viewtopic.php?p=35487#35487 http://www.anddev.org/viewtopic.php?p=35487#35487.
package spin.halo;
import java.io.*;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.UUID;
import android.bluetooth.*;
import android.os.Handler;
import android.util.Log;
public class BluetoothService extends Thread{
private static final String TAG = "BluetoothService";
private static final boolean D = true;
private BluetoothAdapter mBluetoothAdapter = null;
private BluetoothSocket btSocket = null;
private OutputStream outStream = null;
private InputStream inStream = null;
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
private static String address;
private Handler appHandler;
public BluetoothService(Handler h) {
if (D)
Log.e(TAG, "+++ ON CREATE +++");
appHandler = h;
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
Log.e(TAG, "NO BT ADAPTER!");
return;
}
if (!mBluetoothAdapter.isEnabled()) {
Log.e(TAG, "Bluetooth is not enabled!");
return;
}
if (D)
Log.e(TAG, "+++ DONE IN ON CREATE, GOT LOCAL BT ADAPTER +++");
}
public void connectToServer() {
connectToServer("60:33:4B:25:0D:37");
}
public void connectToServer(String serverMacAddress) {
address = serverMacAddress;
//
if (D) {
Log.e(TAG, "+ ABOUT TO ATTEMPT CLIENT CONNECT +");
}
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
Log.v(TAG, "REMOTE DEVICE: " + device.toString());
try {
btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
Log.v(TAG, "SOCKET: " + btSocket.toString());
} catch (Exception e) {
Log.e(TAG, "ON RESUME: Socket creation failed.", e);
}
/* Discovery may be going on, e.g., if you're running a
'scan for devices' search from your handset's Bluetooth
settings, so we call cancelDiscovery(). It doesn't hurt
to call it, but it might hurt not to... discovery is a
heavyweight process; you don't want it in progress when
a connection attempt is made.*/
mBluetoothAdapter.cancelDiscovery();
// Blocking connect, for a simple client nothing else can
// happen until a successful connection is made, so we
// don't care if it blocks.
try {
btSocket.connect();
Log.e(TAG, "ON RESUME: BT connection established, data transfer link open.");
appHandler.sendMessage(appHandler.obtainMessage(ValidationApp.BT_CONNECTION_MADE, ""));
} catch (IOException e) {
try {
Log.e(TAG, "ON RESUME: Could not connect", e);
btSocket.close();
} catch (IOException e2) {
Log.e(TAG, "ON RESUME: Unable to close socket during connection failure", e2);
}
}
// Create output stream
try {
outStream = btSocket.getOutputStream();
} catch (IOException e) {
Log.e(TAG, "ON RESUME: Output stream creation failed.", e);
}
// Create input stream
try {
inStream = btSocket.getInputStream();
} catch (IOException e) {
Log.e(TAG, "Input stream creation failed.", e);
}
}
public void write(String message) {
if(message.length() > 0) {
byte[] msgBuffer = message.getBytes();
try {
outStream.write(msgBuffer);
} catch (IOException e) {
Log.e(TAG, "ON RESUME: Exception during write.", e);
}
}
}
public void run() {
LineNumberReader mLineReader = new LineNumberReader(new InputStreamReader(inStream));
while(true) {
try {
String message = mLineReader.readLine();
if(D) {Log.v(TAG, "Bluetooth says: " + message);}
Log.v(TAG, appHandler.obtainMessage(ValidationApp.BT_MESSAGE, message).toString());
appHandler.sendMessage(appHandler.obtainMessage(ValidationApp.BT_MESSAGE, message));
} catch (IOException e) {
Log.e(TAG, "startListen: ", e);
}
}
}
}
我的 python 代码的关键部分如下。我对这段代码很有信心。
# pybluez library
import bluetooth
server_socket = bluetooth.BluetoothSocket( bluetooth.RFCOMM )
client_sockets = []
server_socket.bind(("",bluetooth.PORT_ANY))
port = server_socket.getsockname()[1]
uuid = "00001101-0000-1000-8000-00805F9B34FB"
print "Listening for devices..."
# advertise service
server_socket.listen(1)
bluetooth.advertise_service( server_socket, "Validation Host",
service_id = uuid,
service_classes = [ uuid, bluetooth.SERIAL_PORT_CLASS ],
profiles = [ bluetooth.SERIAL_PORT_PROFILE ],
)
# accept incoming connections
client_sock, client_info = server_socket.accept()
client_sockets.append(client_sock)
print "Accepted Connection from ", client_info
谢谢参观。
