将 BLE 服务和特征从 Fragment 传递到 Activity 以使用的最佳解决方案是啥？

Posted 2023-03-05

【中文标题】将 BLE 服务和特征从 Fragment 传递到 Activity 以使用的最佳解决方案是啥？

【英文标题】：What is the best solution to pass BLE Services and Characteristics from Fragment to Activity to work with?将 BLE 服务和特征从 Fragment 传递到 Activity 以使用的最佳解决方案是什么？

【发布时间】：2017-09-21 15:52:31

【问题描述】：

在我连接到我的 BLE 设备后，我一起获得了服务和特性。使用此代码：

 if(gattServices == null)return;
    //loops through available GATT SERVICES
    for(BluetoothGattService gattService : gattServices)
        uuid = gattService.getUuid().toString();
        System.out.println("Service discovered: " + uuid);
        new ArrayList<HashMap<String, String>>();
        List<BluetoothGattCharacteristic> gattCharacteristics = gattService.getCharacteristics();
        //loops through available characteristics
        for (BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics)
            final String charUuid = gattCharacteristic.getUuid().toString();
            System.out.println("Characteristic discovered: " + charUuid);

        
    

现在我想在我的应用程序的另一个活动中显示这些服务和特征，但问题是我不知道这样做的最佳方式是什么。有人可以给我建议吗？

【参考方案1】：

您可以创建一个单例模式 BLEManager，将自己设置为所有内容的侦听器并调用当前订阅的侦听器，因此请创建一个接口：

public interface IBLEComListener 

/*/////////////////////////////////////////////////////////////////////////////////////////
// PUBLIC METHODS.
*//////////////////////////////////////////////////////////////////////////////////////////
/**
 * To notify BLE connected.
 *
 * @param bluetoothDevice the instance of connected BluetoothDevice.
 */
void onBLEDeviceConnected(BluetoothDevice bluetoothDevice);
/**
 * To notify BLE disconnected.
 *
 * @param bluetoothDevice the instance of connected BluetoothDevice.
 */
void onBLEDeviceDisconnected(BluetoothDevice bluetoothDevice);
/**
 * To notify when unable to initialize Bluetooth.
 */
void onBLEUnableToInitializeBluetooth();
/**
 * To notify Services ready for Connected BLE Device.
 *
 * @param bluetoothDevice the instance of connected BluetoothDevice.
 */
void onBLEDeviceServicesReady(BluetoothDevice bluetoothDevice);
/**
 * To notify when service not found into BLE device.
 *
 * @param bluetoothDevice the instance of connected BluetoothDevice.
 */
void onServiceNotFound(BluetoothDevice bluetoothDevice);
/**
 * To notify when characteristic notification.
 *
 * @param bluetoothDevice the instance of connected BluetoothDevice.
 * @param bleMessageModelList the instance list of BLEMessageModel.
 */
void onBLECharacteristicNotificationReceived(BluetoothDevice bluetoothDevice, List<BLEMessageModel> bleMessageModelList);
/**
 * To notify when message arrived.
 *
 * @param bluetoothDevice the instance of connected BluetoothDevice.
 * @param characteristicDescriptorIdentifier the ENUM to identify the Characteristic or Descriptor.
 * @param bleMessageModelList the instance list of BLEMessageModel.
 */
void onBLEMessageReceived(BluetoothDevice bluetoothDevice, CharacteristicDescriptorIdentifier characteristicDescriptorIdentifier, List<BLEMessageModel> bleMessageModelList);
/**
 * To notify when message Sent.
 *
 * @param bluetoothDevice the instance of connected BluetoothDevice.
 * @param characteristicDescriptorIdentifier the ENUM to identify the Characteristic or Descriptor.
 */
void onBLEMessageSent(BluetoothDevice bluetoothDevice, CharacteristicDescriptorIdentifier characteristicDescriptorIdentifier);
/**
 * To notify when bluetooth off/disabled.
 */
void onBluetoothDisabled();
/**
 * To notify when bluetooth on/enabled.
 */
void onBluetoothEnabled();
 /**
 * To notify BLE devices discovered/updated.
 *
 * @param deviceModel the BLE device.
 */
    void onBLEDeviceDiscovered(DeviceModel deviceModel);

然后简单地将自己连接到您的单例以进行回调，例如 MyBLEManager.getInstance(this, this) //上下文，监听器

然后让经理回击您的回复。然后在处理 BLE 连接的服务类中执行以下操作：

 @Override
    public void onServicesDiscovered(BluetoothGatt gatt, int status) 
        if (status == BluetoothGatt.GATT_SUCCESS) 
            mServicesReadyBluetoothDeviceMap.clear();
            for(BluetoothDevice bluetoothDevice : gatt.getConnectedDevices()) 
                mServicesReadyBluetoothDeviceMap.put(bluetoothDevice.getAddress(), bluetoothDevice);
            
            IBLEComListener comListener = A35BLEManager.getBLEComListener();
            if(comListener != null) 
                comListener.onBLEDeviceServicesReady(gatt.getDevice());
            
         else 
            A35Log.w(TAG, "onServicesDiscovered received: " + status);
        
    

或者，您可以注册一个广播接收器并以这种方式轻松分发。