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

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

 private void registerBroadcast() {

         // Register for broadcasts when a device is discovered

         IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);

         mContext.registerReceiver(mReceiver, filter);

         // Register for broadcasts when discovery has finished

         filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);

         mContext.registerReceiver(mReceiver, filter);

     }

 private void doDiscovery() {

         // If we're already discovering, stop it

         if (mBluetoothAdapter.isDiscovering()) {

             mBluetoothAdapter.cancelDiscovery();

         }

         // Request discover from BluetoothAdapter

         mBluetoothAdapter.startDiscovery();

     }

 private final BroadcastReceiver mReceiver = new BroadcastReceiver() {

         @Override

         public void onReceive(Context context, Intent intent) {

             String action = intent.getAction();

             if (BluetoothDevice.ACTION_FOUND.equals(action)) {

                 // TODO discovery finds a device

             } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED

                     .equals(action)) {

                 // TODO discovery is finished

             }

         }

     };