如何使用Java发现并配对Android蓝牙设备？有什么代码可供我参考吗？

解决方法:

以下代码将在您必须实现客户端和服务器之后发现已配对和未配对设备的列表,该列表负责配对设备并将数据发送到设备,因为您可以利用BluetoothChatSample给你一个主意.

private Set<BluetoothDevice> pairedDevices;
public static ArrayList<Object> BondedDeviceList;
public static ArrayList<Object> NewDeviceList;

 public void makeDiscoverable()
{
    discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
    discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);
    activity.startActivity(discoverableIntent);
}

//It will Add the paired device in the BondedDeviceList
public void queryPairedDevice(){
    pairedDevices = mBluetoothAdapter.getBondedDevices();

    // If there are paired devices
    if(pairedDevices==null)
    {
        //No Bonded Devices 

    }else
    {
        if (pairedDevices.size() > 0) {
            // Loop through paired devices
            for (BluetoothDevice device : pairedDevices) {
                BondedDeviceList.add(device);
            }
            BondedDeviceList.add("End");
        }
    }
}

//Broadcast Receiver will find the Available devices and the discovery finished
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();

        // When discovery finds a device
        if (BluetoothDevice.ACTION_FOUND.equals(action.trim())) {
            // Get the BluetoothDevice object from the Intent
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            // If it's already paired, skip it, because it's been listed already
            if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
                NewDeviceList.add(device);
            }
            // When discovery is finished, change the Activity title
        } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
            if (NewDeviceList.isEmpty() == true) {
                String noDevices = "No Devices";
                NewDeviceList.add(noDevices);
            }
            System.out.println("Discovery Finished!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
            NewDeviceList.add("End");
        }
    }
};

//This is query for the bluetooth devices 
public void queryDevices(){
    actionFoundFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
    activity.registerReceiver(mReceiver, actionFoundFilter);
    // Don't forget to unregister during onDestroy

    discoveryFinishedFilter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
    activity.registerReceiver(mReceiver, discoveryFinishedFilter); 
    // Don't forget to unregister during onDestroy
    queryPairedDevice();
    mBluetoothAdapter.startDiscovery();
}


//Unregister the receivers
public void unregisterReceiver() {
    // Make sure we're not doing discovery anymore
    if (mBluetoothAdapter != null) {
            mBluetoothAdapter.cancelDiscovery();
    }
    // Unregister broadcast listeners
    activity.unregisterReceiver(mReceiver);
}

干杯.