android蓝牙的配对与取消配对

public class BluetoothAdmin {
    private BluetoothAdapter adapter;
    private Context ctx;

    public BluetoothAdmin(Context ctx) {
        this.ctx = ctx;
        adapter = BluetoothAdapter.getDefaultAdapter();
    }

    public boolean isOpen() {
        return adapter.isEnabled();
    }

    public void open() {
        adapter.enable();
    }

    public void close() {
        adapter.disable();
    }

    public ArrayList<BluetoothDevice> getConnectedDevices() {
        return new ArrayList(adapter.getBondedDevices());
    }



    public void unpairDevice(BluetoothDevice device) {
        try {
            Method m = device.getClass()
                    .getMethod("removeBond", (Class[]) null);
            m.invoke(device, (Object[]) null);
        } catch (Exception e) {

        }
    }

    public void searchDevices() {
        adapter.startDiscovery();
    }

    public void connect(BluetoothDevice device) throws IOException {
        // 固定的UUID
        ConnectThread connectBtThread = new ConnectThread(device.getAddress());
        connectBtThread.start();
    }

    private class ConnectThread extends Thread {
        String macAddress = "";
        BluetoothSocket socket;
        boolean connecting = false;
        boolean connected = true;
        BluetoothDevice mBluetoothDevice;
        int connetTime;

        public ConnectThread(String mac) {
            macAddress = mac;
        }

        public void run() {
            connecting = true;
            connected = false;
            if (adapter == null) {
                adapter = BluetoothAdapter.getDefaultAdapter();
            }
            mBluetoothDevice = adapter.getRemoteDevice(macAddress);
            adapter.cancelDiscovery();

            final String SPP_UUID = "00001101-0000-1000-8000-00805F9B34FB";
            UUID uuid = UUID.fromString(SPP_UUID);
            try {
                socket = mBluetoothDevice.createRfcommSocketToServiceRecord(uuid);
            } catch (IOException e) {

            }
            while (!connected && connetTime <= 3) {
                connectDevice();
            }
        }

        protected void connectDevice() {
            try {
                // 连接建立之前的先配对
                if (mBluetoothDevice.getBondState() == BluetoothDevice.BOND_NONE) {
                    Method creMethod = BluetoothDevice.class
                            .getMethod("createBond");
                    creMethod.invoke(mBluetoothDevice);
                } else {
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            adapter.cancelDiscovery();
            try {
                socket.connect();
                connected = true;
            } catch (Exception e) {
                connetTime++;
                connected = false;
                try {
                    socket.close();
                    socket = null;
                } catch (Exception e2) {
                    // TODO: handle exception
                }
            } finally {
                connecting = false;
            }
        }

        public void cancel() {
            try {
                socket.close();
                socket = null;
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                connecting = false;
            }
        }
    }
}