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private Lock lock = new ReentrantLock();    private Condition condition = lock.newCondition();

public void writeCharacteristic(UUID paramUUID, byte[] recvBuf, ActionCallback paramActionCallback)    {        try {            lock.lock();            writeCharacteristic(Profile.UUID_SERVICE_DRIVERMATE, paramUUID, recvBuf, paramActionCallback);            System.out.println("writeCharacteristic我在等一个新信号"+Thread.currentThread().getName());            condition.await(500, TimeUnit.MILLISECONDS);        } catch (Exception e){        } finally {            System.out.println("writeCharacteristic拿到一个信号"+Thread.currentThread().getName());            lock.unlock();        }    }

public void onCharacteristicWrite(BluetoothGatt paramBluetoothGatt, BluetoothGattCharacteristic paramBluetoothGattCharacteristic, int paramInt)    {        super.onCharacteristicWrite(paramBluetoothGatt, paramBluetoothGattCharacteristic, paramInt);        //Log.w(TAG, "onSuccess onCharacteristicWrite = " + ByteUtil.bytesToHexString(paramBluetoothGattCharacteristic.getValue()));        if (paramInt == 0) {            onSuccess(paramBluetoothGattCharacteristic);        }        else {            onFail(paramInt, "onCharacteristicWrite fail");        }        try {            lock.lock();            System.out.println("onCharacteristicWrite" + Thread.currentThread().getName());            condition.signal();            System.out.println("onCharacteristicWrite我发出了一个信号："+Thread.currentThread().getName());        } catch (Exception e){        } finally {            lock.unlock();        }    }

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