I'm trying to develop an application for Android devices that connects two devices, but the problem is that I can only connect (using Bluetooth) with PC Bluetooth or devices with another OS than Android.
I think that the problem is the UUID, right now I'm using, in BluetoothCommandService.java:
private static final
UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");
And then:
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;
}
Anyway i leave here all the code related to BluetoothCommandService.java:
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);
}
}
}
}
Thank you very much!
rolfl
Why would you think that:
private static final
UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");
is a UUID (Universally Unique ID)?
You now have all your devices using this code with the same UUID. You need to get a better UUID ....
Check out this question (and it's answers): How can I get the UUID of my Android phone in an application?
来源：https://stackoverflow.com/questions/16265504/uuid-bluetooth-and-android-devices