Android蓝牙无法通信,android.bluetooth.BluetoothSocket无法连接
我已經嘗試了其他評論中的所有建議，但都沒有效果，我希望有人能幫助我。我已經為這個問題掙扎了三天了。我確信我的uuid是正確的，并且我知道清單中啟用了藍牙訪問。
我正在嘗試將我的android應用程序連接到運行在Fedora中的python服務器。它斷斷續續地工作，現在一點也不起作用。我收到的android異常通常是。。當在下面附加的代碼中執行btSocket.connect()時，將拋出這些值。12-09 05:08:42.331: ERROR/BluetoothService(676): java.io.IOException: Service discovery failed
或者12-09 05:27:00.757: ERROR/BluetoothService(729): java.io.IOException: Service discovery failed
這是我的android藍牙課程，應該負責一切。當主應用程序類收到套接字已連接到的消息時，線程將啟動。我的藍牙類基于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);
}
}
}
}
下面是我的python代碼的關鍵部分。我對這個密碼很有信心。# 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
謝謝你看我。
總結
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