Question

我正在构建一个与BLE通信的应用程序。我需要将int值写入BluetoothGattDescriptor。如果一切正常后进行，但是如果我想为每个蓝牙蓝牙写信给BluetoothGattDescriptor（在不同的特性中），我将在方法mBluetoothGatt.writeDescriptor(descriptor)中收到一个 false 值，但仅适用于第二个特征，这是我第一次得到 true 。我注意到，如果我将它们之间的延迟时间设置为大约1.3秒，那么两次尝试都将得到正确结果。有人遇到同样的问题吗？

在这里，我将延迟发送通知注册：

            Handler handler = new Handler();

    registeredToNotification(BLEGattAttributes.UUID_STERN_DATA__REMOTE_CONTROLS_SETTINGS_SERVICE,
            BLEGattAttributes.UUID_STERN_DATA_SETTINGS_REMOTES_CONTROL_READ_REQUEST_DELAY_IN, SettingsProperties.DELAY_IN_REGISTER_NOTIFICATION_REQUEST);

    handler.postDelayed(() -> registeredToNotification(BLEGattAttributes.UUID_STERN_DATA__REMOTE_CONTROLS_SETTINGS_SERVICE,
            BLEGattAttributes.UUID_STERN_DATA_SETTINGS_REMOTES_CONTROL_READ_REQUEST_DELAY_OUT, SettingsProperties.DELAY_OUT_REGISTER_NOTIFICATION_REQUEST), 1300);


    handler.postDelayed(() -> registeredToNotification(BLEGattAttributes.UUID_STERN_DATA__REMOTE_CONTROLS_SETTINGS_SERVICE,
            BLEGattAttributes.UUID_STERN_DATA_SETTINGS_REMOTES_CONTROL_READ_REQUEST_SHORT_WASH, SettingsProperties.SHORT_FLUSH_REGISTER_NOTIFICATION_REQUEST), 2600);


    handler.postDelayed(() -> registeredToNotification(BLEGattAttributes.UUID_STERN_DATA__REMOTE_CONTROLS_SETTINGS_SERVICE,
            BLEGattAttributes.UUID_STERN_DATA_SETTINGS_REMOTES_CONTROL_READ_REQUEST_LONG_WASH, SettingsProperties.LONG_FLUSH_REGISTER_NOTIFICATION_REQUEST), 3900);


    handler.postDelayed(() -> registeredToNotification(BLEGattAttributes.UUID_STERN_DATA__REMOTE_CONTROLS_SETTINGS_SERVICE,
            BLEGattAttributes.UUID_STERN_DATA_SETTINGS_REMOTES_CONTROL_READ_REQUEST_SECURITY_TIME, SettingsProperties.SECURITY_TIME_REGISTER_NOTIFICATION_REQUEST), 5200);

以下是这些命令的日志：

 D/IDTEST: ............................setRegisterToNotification
 D/IDTEST: ......setRegisterToNotification ID = 53
 D/IDTEST: ............................Is descriptor registered? = true
 D/IDTEST: ............................Is Notification registered? = true
 D/IDTEST: ............................setRegisterToNotification
 D/IDTEST: ......setRegisterToNotification ID = 56
 D/IDTEST: ............................Is descriptor registered? = true
 D/IDTEST: ............................Is Notification registered? = true
 D/IDTEST: ............................setRegisterToNotification
 D/IDTEST: ......setRegisterToNotification ID = 63
 D/IDTEST: ............................Is descriptor registered? = true
 D/IDTEST: ............................Is Notification registered? = true
 D/IDTEST: ............................setRegisterToNotification
 D/IDTEST: ......setRegisterToNotification ID = 60
 D/IDTEST: ............................Is descriptor registered? = true
 D/IDTEST: ............................Is Notification registered? = true
 D/IDTEST: ............................setRegisterToNotification
 D/IDTEST: ......setRegisterToNotification ID = 66
 D/IDTEST: ............................Is descriptor registered? = true
 D/IDTEST: ............................Is Notification registered? = true

setRegisterToNotification（）方法：

public void setRegisterToNotification(BLEDeviceConnectionManager.DataClass dataClass) {

        Log.d("IDTEST", "............................setRegisterToNotification");
        Log.d("IDTEST", "......setRegisterToNotification ID = " + dataClass.getRequestID());


        BluetoothGattCharacteristic characteristic = mBluetoothGatt.getService(dataClass.getServiceUUid()).getCharacteristic(dataClass.getCharacteristicsUUid());

        BluetoothGattDescriptor descriptor = characteristic.getDescriptors().get(0);

        if (descriptor != null) {
            descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
            descriptor.setValue(BleDataParser.getInstance().intTobyteArray(dataClass.getRequestID()));
            boolean isRegistered = mBluetoothGatt.writeDescriptor(descriptor);

            Log.d("IDTEST", "............................Is descriptor registered? = " + isRegistered);

        }

        boolean isRegistered = mBluetoothGatt.setCharacteristicNotification(characteristic, dataClass.isEnableNotification());

        Log.d("IDTEST", "............................Is Notification registered? = " + isRegistered);


    }

Answer 1

您需要等待描述符回调后才能再次写入。可以在调用BluetoothGattCallback#onDescriptorWrite时使用的connectGatt中找到。

Android BLE BluetoothGattDescriptor writeDescriptor问题

1 个答案: