private void search() {BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();if (!adapter.isEnabled()) {adapter.enable();}Intent enable = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);enable.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 3600); //3600为蓝牙设备可见时间startActivity(enable);Intent searchIntent = new Intent(this, ComminuteActivity.class);startActivity(searchIntent);}

public class ComminuteActivity extends Activity {private BluetoothReceiver receiver;private BluetoothAdapter bluetoothAdapter;private List<String> devices;private List<BluetoothDevice> deviceList;private Bluetooth client;private final String lockName = "BOLUTEK";private String message = "000001";private ListView listView;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.search_layout);listView = (ListView) this.findViewById(R.id.list);deviceList = new ArrayList<BluetoothDevice>();devices = new ArrayList<String>();bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();bluetoothAdapter.startDiscovery();IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);receiver = new BluetoothReceiver();registerReceiver(receiver, filter);listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {setContentView(R.layout.connect_layout);BluetoothDevice device = deviceList.get(position);client = new Bluetooth(device, handler);try {client.connect(message);} catch (Exception e) {Log.e("TAG", e.toString());}}});}@Overrideprotected void onDestroy() {unregisterReceiver(receiver);super.onDestroy();}private final Handler handler = new Handler() {@Overridepublic void handleMessage(Message msg) {switch (msg.what) {case Bluetooth.CONNECT_FAILED:Toast.makeText(ComminuteActivity.this, "连接失败", Toast.LENGTH_LONG).show();try {client.connect(message);} catch (Exception e) {Log.e("TAG", e.toString());}break;case Bluetooth.CONNECT_SUCCESS:Toast.makeText(ComminuteActivity.this, "连接成功", Toast.LENGTH_LONG).show();break;case Bluetooth.READ_FAILED:Toast.makeText(ComminuteActivity.this, "读取失败", Toast.LENGTH_LONG).show();break;case Bluetooth.WRITE_FAILED:Toast.makeText(ComminuteActivity.this, "写入失败", Toast.LENGTH_LONG).show();break;case Bluetooth.DATA:Toast.makeText(ComminuteActivity.this, msg.arg1 + "", Toast.LENGTH_LONG).show();break;}}};private class BluetoothReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {String action = intent.getAction();if (BluetoothDevice.ACTION_FOUND.equals(action)) {BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);if (isLock(device)) {devices.add(device.getName());}deviceList.add(device);}showDevices();}}private boolean isLock(BluetoothDevice device) {boolean isLockName = (device.getName()).equals(lockName);boolean isSingleDevice = devices.indexOf(device.getName()) == -1;return isLockName && isSingleDevice;}private void showDevices() {ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,devices);listView.setAdapter(adapter);}
}

 private class BluetoothReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {String action = intent.getAction();if (BluetoothDevice.ACTION_FOUND.equals(action)) {BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);if (isLock(device)) {devices.add(device.getName());}deviceList.add(device);}showDevices();}}

 bluetoothAdapter.startDiscovery();

 IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);receiver = new BluetoothReceiver();registerReceiver(receiver, filter);

   @Overrideprotected void onDestroy() {unregisterReceiver(receiver);super.onDestroy();}

 boolean isSingleDevice = devices.indexOf(device.getName()) == -1;

public void connect(final String message) {Thread thread = new Thread(new Runnable() {public void run() {BluetoothSocket tmp = null;Method method;try {method = device.getClass().getMethod("createRfcommSocket", new Class[]{int.class});tmp = (BluetoothSocket) method.invoke(device, 1);} catch (Exception e) {setState(CONNECT_FAILED);Log.e("TAG", e.toString());}socket = tmp;try {socket.connect();isConnect = true;} catch (Exception e) {setState(CONNECT_FAILED);Log.e("TAG", e.toString());}

mAdapter.listenUsingRfcommWithServiceRecord(NAME, MY_UUID);

device.createRfcommSocketToServiceRecord(MY_UUID);

 bluetoothAdapter.cancelDiscovery();

              if (isConnect) {try {OutputStream outStream = socket.getOutputStream();outStream.write(getHexBytes(message));} catch (IOException e) {setState(WRITE_FAILED);Log.e("TAG", e.toString());}try {InputStream inputStream = socket.getInputStream();int data;while (true) {try {data = inputStream.read();Message msg = handler.obtainMessage();msg.what = DATA;msg.arg1 = data;handler.sendMessage(msg);} catch (IOException e) {setState(READ_FAILED);Log.e("TAG", e.toString());break;}}} catch (IOException e) {setState(WRITE_FAILED);Log.e("TAG", e.toString());}}if (socket != null) {try {socket.close();} catch (IOException e) {Log.e("TAG", e.toString());}}}}

        private byte[] getHexBytes(String message) {int len = message.length() / 2;char[] chars = message.toCharArray();String[] hexStr = new String[len];byte[] bytes = new byte[len];for (int i = 0, j = 0; j < len; i += 2, j++) {hexStr[j] = "" + chars[i] + chars[i + 1];bytes[j] = (byte) Integer.parseInt(hexStr[j], 16);}return bytes;}

 <uses-permission android:name="android.permission.BLUETOOTH"/><uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>