Unity实现Android源生平台蓝牙BLE4.0数据传输(三)

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上篇我说到如何打开系统蓝牙扫描设备连接具体连接我们在这里说

 AndroidJavaObject wfzBluetoothGattCallback = new AndroidJavaObject("com.wfz.bletounity.WFZBluetoothGattCallback”);//连接的事件回调对象BluetoothGattCallback bluetoothGattCallback = new BluetoothGattCallback();//unity事件回调接口的实现类//特征值数据变化的事件委托bluetoothGattCallback.onCharacteristicChangedDelegate = (g, c) =>{var data = c.Call<byte[]>("getValue");string d = "";for (int i = 0; i < data.Length; i++){d += data[i];}Debug.Log(d);};//设备连接状态变化的事件委托bluetoothGattCallback.onConnectionStateChangeDelegate = (g, s, n) =>{switch (n){case 0:Debug.Log("断开连接");break;case 1:Debug.Log("连接中");break;case 2:Debug.Log("连接成功");Debug.Log("获取到gatt对象"+g.Call<AndroidJavaObject>("getDevice").Call<string>("getName"));var isFind= g.Call<bool>("discoverServices");break;case 3:Debug.Log("断开中");break;default:break;}};
//发现设备服务事件委托bluetoothGattCallback.onServicesDiscoveredDelegate = (g, c) =>{var  gattServices = g.Call<AndroidJavaObject>("getServices");Debug.Log("发现新服务..." + gattServices.Get<int>("size"));if (gattCharacteristic==null){gattCharacteristic = GetCharacteristic(GetService(g, serviceID), characteristicID);NotificationData(g, gattCharacteristic, descriptorID);}};

回调对象写好了我们就可以连接设备了

wfzBluetoothGattCallback.Call("AddUnityCallback", bluetoothGattCallback);//把实现的接口添加到回调对象buetoothGatt = device.Call<AndroidJavaObject>("connectGatt", AndroidCall.unityActivity, true, wfzBluetoothGattCallback);//开始连接

下面是获取服务特征值的函数实现

  /// <summary>/// Gets the service./// </summary>/// <returns>The service.</returns>/// <param name="gatt">Gatt.</param>/// <param name="uuid">UUID.</param>public AndroidJavaObject GetService(AndroidJavaObject gatt, string uuid){return gatt.Call<AndroidJavaObject>("getService", ToAndroidUUID(uuid));}/// <summary>/// Gets the characteristic./// </summary>/// <returns>The characteristic.</returns>/// <param name="Service">Service.</param>/// <param name="uuid">UUID.</param>public  AndroidJavaObject GetCharacteristic(AndroidJavaObject Service,string uuid){return Service.Call<AndroidJavaObject>("getCharacteristic", ToAndroidUUID(uuid));}

打开特征值的通知

  /// <summary>/// Notifications the data./// </summary>/// <param name="gatt">Gatt.</param>/// <param name="characteristic">Characteristic.</param>/// <param name="uuid">UUID.</param>public void NotificationData(AndroidJavaObject gatt,AndroidJavaObject characteristic,string uuid){var b = gatt.Call<bool>("setCharacteristicNotification", characteristic, true);if (b){var bluetoothGattDescriptor = new AndroidJavaClass("android.bluetooth.BluetoothGattDescriptor");var descriptor= characteristic.Call<AndroidJavaObject>("getDescriptor",ToAndroidUUID(uuid));var  isSet=  descriptor.Call<bool>("setValue", bluetoothGattDescriptor.GetStatic<byte[]>("ENABLE_NOTIFICATION_VALUE"));if (isSet){var iSwrite=  gatt.Call<bool>("writeDescriptor", descriptor);if (iSwrite){Debug.Log("打开特性通知");}}}}

打开通知之后就可以在onCharacteristicChanged 事件里面获取到发送过来的数据了

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