java - 安卓手机蓝牙连接两个芯片

Question

我正在尝试让我的 Android 手机 (NexusOne) 同时连接到两个蓝牙芯片。我在互联网上阅读了各种回复，得出的结论是这可能会或可能不会完成。使它工作的人说它通过建立多个 RFcomm 连接来工作，就像两个并行的连接线程一样。我不知道该怎么做。我有我的连接代码，目前只能连接到一个芯片。想法？

    package com.example.connect;
    public class ConnectThread extends Activity {
        static BluetoothSocket mmSocket;
        static BluetoothSocket mmSocket2;
        static BluetoothDevice mmDevice;
        static BluetoothDevice mmDevice2;
        static InputStream mmInputStream;
        static OutputStream mmOutputStream;
        static BluetoothAdapter mBluetoothAdapter;
        static BluetoothAdapter mBluetoothAdapter2;
        TextView myLabel;


       @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_connect_thread);

        Button button = (Button)this.findViewById(R.id.button1);
        myLabel = (TextView)findViewById(R.id.textView1);
        button.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Toast.makeText(ConnectThread.this, "Connection in progress", Toast.LENGTH_SHORT).show();
                myLabel.setText("Connection in progress");
                try 
                {
                     findBT2();
                     openBT2();
                     findBT();
                     openBT();
                }
                catch (IOException ex) { }
               }        
             });}




            void findBT2() 
            {


                mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
                if(mBluetoothAdapter == null)
                {
                    myLabel.setText("No bluetooth adapter available");
                }

                if(!mBluetoothAdapter.isEnabled())
                {
                    Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                    startActivityForResult(enableBluetooth, 0);
                }

                Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
                if(pairedDevices.size() > 0)
                {
                    for(BluetoothDevice device2 : pairedDevices)
                    {
                        if(device2.getName().equals("H-C-2010-06-01")) 
                        {
                            mmDevice2 = device2;
                            myLabel.setText("Bluetooth Device Found");
                            break;
                        }
                    }

                    if(pairedDevices.size()==0){myLabel.setText("Please Pair devices");}
                }




            }
            public int openBT2() throws IOException
            {
                UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb"); //Standard SerialPortService ID
                mmSocket2 = mmDevice2.createRfcommSocketToServiceRecord(uuid);        
                mmSocket2.connect();
                mmOutputStream = mmSocket2.getOutputStream();
                mmInputStream = mmSocket2.getInputStream();

                return 1;
            }


             void findBT() 
            {


                mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
                if(mBluetoothAdapter == null)
                {
                    myLabel.setText("No bluetooth adapter available");
                }

                if(!mBluetoothAdapter.isEnabled())
                {
                    Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                    startActivityForResult(enableBluetooth, 0);
                }

                Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
                if(pairedDevices.size() > 0)
                {
                    for(BluetoothDevice device : pairedDevices)
                    {
                        if(device.getName().equals("HC-05")) 
                        {
                            mmDevice = device;
                            myLabel.setText("Bluetooth Device Found");
                            break;
                        }
                    }

                    if(pairedDevices.size()==0){myLabel.setText("Please Pair devices");}
                }




            }

            public int openBT() throws IOException
            {
                UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb"); //Standard SerialPortService ID
                mmSocket = mmDevice.createRfcommSocketToServiceRecord(uuid);        
                mmSocket.connect();
                mmOutputStream = mmSocket.getOutputStream();
                mmInputStream = mmSocket.getInputStream();

                return 1;
            }

            public void onReceive(Context context, Intent intent) {
                String action = intent.getAction();
                if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action))
                { myLabel.setText("CONNECTED");}
            }
            void closeBT() throws IOException
        {

            mmOutputStream.close();
            mmInputStream.close();
            mmSocket.close();
            myLabel.setText("Bluetooth Closed");
        }
}

Answer 1

更新:我没有尝试单独连接到每个芯片，而是拉出配对设备列表并一次连接到每个芯片，从而获得了双重连接。这可以连接到两者，但仍然没有数据显示...... 公共(public)类 Main_Activity 扩展 Activity 实现 OnItemClickListener {

ArrayAdapter<String> listAdapter;
ListView listView;
static TextView MyLabel;
BluetoothAdapter btAdapter;
Set<BluetoothDevice> devicesArray;
ArrayList<String> pairedDevices;
ArrayList<BluetoothDevice> devices;
public static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
protected static final int SUCCESS_CONNECT = 0;
protected static final int MESSAGE_READ = 1;
IntentFilter filter;
BroadcastReceiver receiver;
String tag = "debugging";

Handler mHandler = new Handler(){
    @Override
    public void handleMessage(Message msg) {
        // TODO Auto-generated method stub
        Log.i(tag, "in handler");
        super.handleMessage(msg);
        switch(msg.what){
        case SUCCESS_CONNECT:
            // DO something
            ConnectedThread connectedThread = new ConnectedThread((BluetoothSocket)msg.obj);
            Toast.makeText(getApplicationContext(), "CONNECT", 0).show();
            String s = "successfully connected";
            connectedThread.write(s.getBytes());
            Log.i(tag, "connected");
            break;
        case MESSAGE_READ:
            byte[] readBuf = (byte[])msg.obj;
            String string = new String(readBuf);
            Toast.makeText(getApplicationContext(), string, 0).show();
            MyLabel.setText(string);
            break;
        }
    }
};
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    MyLabel = (TextView)findViewById(R.id.Receive);
    init();
    if(btAdapter==null){
        Toast.makeText(getApplicationContext(), "No bluetooth detected", 0).show();
        finish();
    }
    else{
        if(!btAdapter.isEnabled()){
            turnOnBT();
        }

        getPairedDevices();
        startDiscovery();
    }


}
private void startDiscovery() {
    // TODO Auto-generated method stub
    btAdapter.cancelDiscovery();
    btAdapter.startDiscovery();

}
private void turnOnBT() {
    // TODO Auto-generated method stub
    Intent intent =new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    startActivityForResult(intent, 1);
}
private void getPairedDevices() {
    // TODO Auto-generated method stub
    devicesArray = btAdapter.getBondedDevices();
    if(devicesArray.size()>0){
        for(BluetoothDevice device:devicesArray){
            pairedDevices.add(device.getName());

        }
    }
}
private void init() {
    // TODO Auto-generated method stub
    listView=(ListView)findViewById(R.id.listView);
    listView.setOnItemClickListener(this);
    listAdapter= new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,0);
    listView.setAdapter(listAdapter);
    btAdapter = BluetoothAdapter.getDefaultAdapter();
    pairedDevices = new ArrayList<String>();
    filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
    devices = new ArrayList<BluetoothDevice>();
    receiver = new BroadcastReceiver(){
        @Override
        public void onReceive(Context context, Intent intent) {
            // TODO Auto-generated method stub
            String action = intent.getAction();

            if(BluetoothDevice.ACTION_FOUND.equals(action)){
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                devices.add(device);
                String s = "";
                for(int a = 0; a < pairedDevices.size(); a++){
                    if(device.getName().equals(pairedDevices.get(a))){
                        //append 
                        s = "(Paired)";
                        break;
                    }
                }

                listAdapter.add(device.getName()+" "+s+" "+"\n"+device.getAddress());
            }

            else if(BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)){
                // run some code
            }
            else if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){
                // run some code



            }
            else if(BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)){
                if(btAdapter.getState() == btAdapter.STATE_OFF){
                    turnOnBT();
                }
            }

        }
    };

    registerReceiver(receiver, filter);
     filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
    registerReceiver(receiver, filter);
     filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
    registerReceiver(receiver, filter);
     filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
    registerReceiver(receiver, filter);
}


@Override
protected void onPause() {
    // TODO Auto-generated method stub
    super.onPause();
    unregisterReceiver(receiver);
}

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode == RESULT_CANCELED){
            Toast.makeText(getApplicationContext(), "Bluetooth must be enabled to continue", Toast.LENGTH_SHORT).show();
            finish();
        }
    }
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
            long arg3) {
        // TODO Auto-generated method stub

        if(btAdapter.isDiscovering()){
            btAdapter.cancelDiscovery();
        }
        if(listAdapter.getItem(arg2).contains("Paired")){

            BluetoothDevice selectedDevice = devices.get(arg2);
            ConnectThread connect = new ConnectThread(selectedDevice);
            connect.start();
            Log.i(tag, "in click listener");
        }
        else{
            Toast.makeText(getApplicationContext(), "device is not paired", 0).show();
        }
    }

    private class ConnectThread extends Thread {

        private final BluetoothSocket mmSocket;
        private final BluetoothDevice mmDevice;

        public ConnectThread(BluetoothDevice device) {
            // Use a temporary object that is later assigned to mmSocket,
            // because mmSocket is final
            BluetoothSocket tmp = null;
            mmDevice = device;
            Log.i(tag, "construct");
            // Get a BluetoothSocket to connect with the given BluetoothDevice
            try {
                // MY_UUID is the app's UUID string, also used by the server code
                tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
            } catch (IOException e) { 
                Log.i(tag, "get socket failed");

            }
            mmSocket = tmp;
        }

        public void run() {
            // Cancel discovery because it will slow down the connection
            btAdapter.cancelDiscovery();
            Log.i(tag, "connect - run");
            try {
                // Connect the device through the socket. This will block
                // until it succeeds or throws an exception
                mmSocket.connect();
                Log.i(tag, "connect - succeeded");
            } catch (IOException connectException) {    Log.i(tag, "connect failed");
                // Unable to connect; close the socket and get out
                try {
                    mmSocket.close();
                } catch (IOException closeException) { }
                return;
            }

            // Do work to manage the connection (in a separate thread)

            mHandler.obtainMessage(SUCCESS_CONNECT, mmSocket).sendToTarget();
        }



        /** Will cancel an in-progress connection, and close the socket */
        public void cancel() {
            try {
                mmSocket.close();
            } catch (IOException e) { }
        }
    }

    private class ConnectedThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final InputStream mmInStream;
        private final OutputStream mmOutStream;

        public ConnectedThread(BluetoothSocket socket) {
            mmSocket = socket;
            InputStream tmpIn = null;
            OutputStream tmpOut = null;

            // Get the input and output streams, using temp objects because
            // member streams are final
            try {
                tmpIn = socket.getInputStream();
                tmpOut = socket.getOutputStream();
            } catch (IOException e) { }

            mmInStream = tmpIn;
            mmOutStream = tmpOut;
        }

        public void run() {
            Toast.makeText(Main_Activity.this, "running", Toast.LENGTH_SHORT).show();
            byte[] buffer;  // buffer store for the stream
            int bytes; // bytes returned from read()

            // Keep listening to the InputStream until an exception occurs
            while (true) {
                try {
                    // Read from the InputStream
                    buffer = new byte[5000];
                    bytes = mmInStream.read(buffer);
                    // Send the obtained bytes to the UI activity
                    mHandler.obtainMessage(MESSAGE_READ, bytes, -1, buffer)
                            .sendToTarget();

                } catch (IOException e) {
                    break;
                }
            }
        }

        /* Call this from the main activity to send data to the remote device */
        public void write(byte[] bytes) {
            try {
                mmOutStream.write(bytes);
            } catch (IOException e) { }
        }

        /* Call this from the main activity to shutdown the connection */
        public void cancel() {
            try {
                mmSocket.close();
            } catch (IOException e) { }
        }
    }