UUID蓝牙和Android设备
我正在尝试开发一个连接两个设备的Android设备的应用程序，但问题是我只能连接（使用蓝牙）PC蓝牙或设备与Android之外的其他操作系统。
我认为问题是UUID，现在我正在使用BluetoothCommandService.java ：
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");
然后：
private class ConnectThread extends Thread { private final BluetoothSocket mmSocket; private final BluetoothDevice mmDevice; public ConnectThread(BluetoothDevice device) { mmDevice = device; BluetoothSocket tmp = null; // Get a BluetoothSocket for a connection with the // given BluetoothDevice try { tmp = device.createRfcommSocketToServiceRecord(MY_UUID); } catch (IOException e) { Log.e(LOG_TAG, "create() failed", e); } mmSocket = tmp; }
无论如何，我在这里留下与BluetoothCommandService.java相关的所有代码：
package com.example.vista; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.UUID; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.bluetooth.BluetoothSocket; import android.content.Context; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.telephony.TelephonyManager; import android.util.Log; public class BluetoothCommandService { // Debugging private static final String LOG_TAG = "BluetoothCommandService"; private static final boolean DEBUG = true; // Unique UUID for this application private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb"); /*TelephonyManager tManager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE); String uuid = tManager.getDeviceId();*/ // Member fields private final BluetoothAdapter mAdapter; private final Handler mHandler; private ConnectThread mConnectThread; private ConnectedThread mConnectedThread; private int mState; // private BluetoothDevice mSavedDevice; // private int mConnectionLostCount; // Constants that indicate the current connection state public static final int STATE_NONE = 0; // we're doing nothing public static final int STATE_LISTEN = 1; // now listening for incoming connections public static final int STATE_CONNECTING = 2; // now initiating an outgoing connection public static final int STATE_CONNECTED = 3; // now connected to a remote device // Constants that indicate command to computer public static final int EXIT_CMD = -1; public static final int VOL_UP = 1; public static final int VOL_DOWN = 2; public static final int MOUSE_MOVE = 3; /** * Constructor. Prepares a new BluetoothChat session. * @param context The UI Activity Context * @param handler A Handler to send messages back to the UI Activity */ public BluetoothCommandService(Context context, Handler handler) { if (DEBUG) Log.e(LOG_TAG, "BluetoothCommandService"); mAdapter = BluetoothAdapter.getDefaultAdapter(); mState = STATE_NONE; //mConnectionLostCount = 0; mHandler = handler; } /** * Set the current state of the chat connection * @param state An integer defining the current connection state */ private synchronized void setState(int state) { if (DEBUG) Log.e(LOG_TAG, "setState() " + mState + " -> " + state); mState = state; // Give the new state to the Handler so the UI Activity can update mHandler.obtainMessage(Buscarpartida.MESSAGE_STATE_CHANGE, state, -1).sendToTarget(); } /** * Return the current connection state. */ public synchronized int getState() { Log.e(LOG_TAG, "MSTATE "+ mState); return mState; } /** * Start the chat service. Specifically start AcceptThread to begin a * session in listening (server) mode. Called by the Activity onResume() */ public synchronized void start() { if (DEBUG) Log.e(LOG_TAG, "start"); // Cancel any thread attempting to make a connection if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;} // Cancel any thread currently running a connection if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;} setState(STATE_NONE); Log.e(LOG_TAG, "start fin "+ mState); } /** * Start the ConnectThread to initiate a connection to a remote device. * @param device The BluetoothDevice to connect */ public synchronized void connect(BluetoothDevice device) { if (DEBUG) Log.e(LOG_TAG, "connect to: " + device); // Cancel any thread attempting to make a connection if (mState == STATE_CONNECTING) { if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;} } // Cancel any thread currently running a connection if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;} // Start the thread to connect with the given device mConnectThread = new ConnectThread(device); mConnectThread.start(); setState(STATE_CONNECTING); } /** * 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) { // Cancel the thread that completed the connection if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;} // Cancel any thread currently running a connection if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;} // Start the thread to manage the connection and perform transmissions mConnectedThread = new ConnectedThread(socket); mConnectedThread.start(); // Send the name of the connected device back to the UI Activity Message msg = mHandler.obtainMessage(Buscarpartida.MESSAGE_DEVICE_NAME); Bundle bundle = new Bundle(); bundle.putString(Buscarpartida.DEVICE_NAME, device.getName()); msg.setData(bundle); mHandler.sendMessage(msg); setState(STATE_CONNECTED); } /** * Stop all threads */ public synchronized void stop() { if (DEBUG) Log.e(LOG_TAG, "stop"); if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;} if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;} setState(STATE_NONE); if (DEBUG) Log.e(LOG_TAG, "stop fin "+ mState); } /** * Write to the ConnectedThread in an unsynchronized manner * @param out The bytes to write * @see ConnectedThread#write(byte[]) */ 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); } public void write(int 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); } /** * Indicate that the connection attempt failed and notify the UI Activity. */ private void connectionFailed() { setState(STATE_LISTEN); // Send a failure message back to the Activity Message msg = mHandler.obtainMessage(Buscarpartida.MESSAGE_TOAST); Bundle bundle = new Bundle(); bundle.putString(Buscarpartida.TOAST, "Imposible Conectar"); msg.setData(bundle); mHandler.sendMessage(msg); } /** * Indicate that the connection was lost and notify the UI Activity. */ private void connectionLost() { // mConnectionLostCount++; // if (mConnectionLostCount < 3) { // // Send a reconnect message back to the Activity // Message msg = mHandler.obtainMessage(Main.MESSAGE_TOAST); // Bundle bundle = new Bundle(); // bundle.putString(Main.TOAST, "Device connection was lost. Reconnecting..."); // msg.setData(bundle); // mHandler.sendMessage(msg); // // connect(mSavedDevice); // } else { setState(STATE_LISTEN); // Send a failure message back to the Activity Message msg = mHandler.obtainMessage(Buscarpartida.MESSAGE_TOAST); Bundle bundle = new Bundle(); bundle.putString(Buscarpartida.TOAST, "Conexion Perdida"); msg.setData(bundle); mHandler.sendMessage(msg); // } } /** * This thread runs while attempting to make an outgoing connection * with a device. It runs straight through; the connection either * succeeds or fails. */ private class ConnectThread extends Thread { private final BluetoothSocket mmSocket; private final BluetoothDevice mmDevice; public ConnectThread(BluetoothDevice device) { mmDevice = device; BluetoothSocket tmp = null; // Get a BluetoothSocket for a connection with the // given BluetoothDevice try { tmp = device.createRfcommSocketToServiceRecord(MY_UUID); } catch (IOException e) { Log.e(LOG_TAG, "create() failed", e); } mmSocket = tmp; } public void run() { setName("ConnectThread"); // Always cancel discovery because it will slow down a connection mAdapter.cancelDiscovery(); Log.e(LOG_TAG, "cancelDiscovery()"); // Make a connection to the BluetoothSocket try { // This is a blocking call and will only return on a // successful connection or an exception mmSocket.connect(); Log.e(LOG_TAG, "mmSocket.connect()"); } catch (IOException e) { connectionFailed(); Log.e(LOG_TAG, " connectionFailed()"); // Close the socket try { mmSocket.close(); } catch (IOException e2) { Log.e(LOG_TAG, "unable to close() socket during connection failure", e2); } // Start the service over to restart listening mode Log.e(LOG_TAG, "run2()"); BluetoothCommandService.this.start(); return; } // Reset the ConnectThread because we're done synchronized (BluetoothCommandService.this) { mConnectThread = null; } // Start the connected thread connected(mmSocket, mmDevice); } public void cancel() { try { mmSocket.close(); } catch (IOException e) { Log.e(LOG_TAG, "close() of connect socket failed", e); } } } /** * This thread runs during a connection with a remote device. * It handles all incoming and outgoing transmissions. */ private class ConnectedThread extends Thread { private final BluetoothSocket mmSocket; private final InputStream mmInStream; private final OutputStream mmOutStream; public ConnectedThread(BluetoothSocket socket) { Log.e(LOG_TAG, "create ConnectedThread"); mmSocket = socket; InputStream tmpIn = null; OutputStream tmpOut = null; // Get the BluetoothSocket input and output streams try { tmpIn = socket.getInputStream(); tmpOut = socket.getOutputStream(); } catch (IOException e) { Log.e(LOG_TAG, "temp sockets not created", e); } mmInStream = tmpIn; mmOutStream = tmpOut; } public void run() { Log.e(LOG_TAG, "runrer"); byte[] buffer = new byte[1024]; // Keep listening to the InputStream while connected while (true) { try { // Read from the InputStream int bytes = mmInStream.read(buffer); // Send the obtained bytes to the UI Activity mHandler.obtainMessage(Buscarpartida.MESSAGE_READ, bytes, -1, buffer) .sendToTarget(); } catch (IOException e) { Log.e(LOG_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); // Share the sent message back to the UI Activity // mHandler.obtainMessage(BluetoothChat.MESSAGE_WRITE, -1, -1, buffer) // .sendToTarget(); } catch (IOException e) { Log.e(LOG_TAG, "Exception during write", e); } } public void write(int out) { try { mmOutStream.write(out); // Share the sent message back to the UI Activity // mHandler.obtainMessage(BluetoothChat.MESSAGE_WRITE, -1, -1, buffer) // .sendToTarget(); } catch (IOException e) { Log.e(LOG_TAG, "Exception during write", e); } } public void cancel() { try { mmOutStream.write(EXIT_CMD); mmSocket.close(); } catch (IOException e) { Log.e(LOG_TAG, "close() of connect socket failed", e); } } } }
非常感谢你！
你为什么那么想：
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");
是UUID（通用唯一ID）？
您现在拥有使用此代码的所有设备具有相同的 UUID。 你需要一个更好的UUID ….
看看这个问题（以及它的答案）： 如何在应用程序中获取我的Android手机的UUID？