Android蓝牙配对连接

Question

嗨，我要开发一个应用程序，所以我有一个设备（服务器）与3个客户端。我做了所有的验证，打开蓝牙，找到设备，所有的工作都很好。但当我要连接一个设备时，我不知道会发生什么。

我正在使用下一个代码，当我单击一个我想连接它的设备时。我只有我的应用程序在母设备中。

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    // TODO Auto-generated method stub
    try {
        if(btADapter.isDiscovering()){
            btADapter.cancelDiscovery();
        }
        if(listAdapter.getItem(position).contains("Paired")){
            BluetoothDevice selectedDevice = devices.get(position);
            ConnectThread connect = new ConnectThread(selectedDevice);
            connect.start();
        }
        else{
            BluetoothDevice selectedDevice = devices.get(position);
            ConnectThread connect = new ConnectThread(selectedDevice);
            connect.start();
            //pairDevice(devices.get(position));
            //Toast.makeText(getApplicationContext(), "device is not paired", Toast.LENGTH_LONG).show();
        }

    } catch (Exception e) {
        System.out.println(e);
    }
}

这里我有一个问题，如果它没有配对会发生什么？如果我尝试连接，它会自动配对吗？

我的UUID是：“00001101-0000-1000-8000-00805F9B34FB”，然后我的连接代码：

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;

        // 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) {
        }
        mmSocket = tmp;
    }

    public void run() {
        // Cancel discovery because it will slow down the connection
        btADapter.cancelDiscovery();

        try {
            // Connect the device through the socket. This will block
            // until it succeeds or throws an exception
            mmSocket.connect();
        } catch (IOException connectException) {
            System.out.println(connectException);
            // 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) {
        }
    }
}

当我执行mmsocket.connect（）时；应用程序崩溃并返回：java.io.ioException：服务发现失败，我不知道该怎么办。

BluetoothSocket socket = device.createInsecureRfcommSocketToServiceRecord(MY_UUID);
Method m = device.getClass().getMethod("createInsecureRfcommSocket", new Class[] {int.class});
socket = (BluetoothSocket) m.invoke(device, 1);
bluetoothAdapter.cancelDiscovery();
socket.connect();

Answer 1

当您尝试连接时，它将向您尝试连接的设备发送特定的整数代码，它将不得不接受传入的连接，并允许您（母设备）在它们之间共享文件，一旦您的设备配对，它将不再要求您再次配对，当您选择您先前配对的特定设备时，它将启动连接，您可以在运行时共享数据，我将建议您使用同步，因为您正在进行多线程操作，以便只有一个线程能够读取和写一个时间，有没有死锁或饥饿发生在您的设备最好！