13

我正在尝试在 NEXUS 9 中做广告并收到 ADVERTISE_FAILED_DATA_TOO_LARGE 的错误。当我在成功发布广告后添加服务时，它工作得非常好，但是如果我通过 Advertise Data builder 添加服务以便其他设备可以在扫描时进行过滤，我会收到错误代码 1，即 ADVERTISE_FAILED_DATA_TOO_LARGE

a) 工作守则 

     public void startAdvertisingService() {
    AdvertiseSettings settings = new AdvertiseSettings.Builder()
            .setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_HIGH)
            .setTimeout(0)
            .setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_LOW_LATENCY)      
            .build();


     AdvertiseData.Builder advertiseData = new AdvertiseData.Builder();
    advertiseData.setIncludeDeviceName(true);

     BluetoothLeAdvertiser myBluetoothLeAdvertiser = btAdapter.getBluetoothLeAdvertiser();
      myBluetoothLeAdvertiser.stopAdvertising(mAdvertiseCallback);

    myBluetoothLeAdvertiser.startAdvertising(settings, advertiseData.build(),mAdvertiseCallback);

   }
    private AdvertiseCallback mAdvertiseCallback = new AdvertiseCallback() {

    @Override
    public void onStartSuccess(AdvertiseSettings settingsInEffect) {
        super.onStartSuccess(settingsInEffect);
        BLEBroadcast();
    }

    @Override
    public void onStartFailure(int errorCode) {
        String description = "";
        if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_FEATURE_UNSUPPORTED)
            description = "ADVERTISE_FAILED_FEATURE_UNSUPPORTED";
        else if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_TOO_MANY_ADVERTISERS)
            description = "ADVERTISE_FAILED_TOO_MANY_ADVERTISERS";
        else if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_ALREADY_STARTED)
            description = "ADVERTISE_FAILED_ALREADY_STARTED";
        else if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_DATA_TOO_LARGE)
            description = "ADVERTISE_FAILED_DATA_TOO_LARGE";
        else if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_INTERNAL_ERROR)
            description = "ADVERTISE_FAILED_INTERNAL_ERROR";
        else description = "unknown";

    }
};

并添加服务：

 void BLEBroadcast() {

    BluetoothGattCharacteristic characteristic = new     BluetoothGattCharacteristic(characteristicUUID, BluetoothGattCharacteristic.PROPERTY_NOTIFY | BluetoothGattCharacteristic.PROPERTY_INDICATE | BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_WRITE, BluetoothGattCharacteristic.PERMISSION_READ | BluetoothGattCharacteristic.PERMISSION_WRITE);

    BluetoothGattDescriptor desc = new BluetoothGattDescriptor(descriptorUUID, BluetoothGattDescriptor.PERMISSION_READ | BluetoothGattDescriptor.PERMISSION_WRITE);
    desc.setValue("".getBytes());

    characteristic.addDescriptor(desc);

    BluetoothGattService service = new BluetoothGattService(serviceUUID,     BluetoothGattService.SERVICE_TYPE_PRIMARY);
    service.addCharacteristic(characteristic);

    mGattServer.addService(service);
 }

b）最初添加服务时不起作用，以便可以通过过滤器被中央发现：

在调用之前调用BLEBroadcast()函数startAdvertisingService()并添加

        AdvertiseData.Builder advertiseData = new AdvertiseData.Builder();
        advertiseData.addServiceUuid(new ParcelUuid(serviceUUID));

给出错误代码 1 的广告失败。

4

3 回答 3

41

我怀疑这是导致问题的代码行：

advertiseData.setIncludeDeviceName(true);

通告将没有足够的空间用于设备名称和 16 字节服务 UUID。因此，如果您包含上述内容，请添加：

advertiseData.addServiceUuid(new ParcelUuid(serviceUUID));

你会得到你描述的错误。尝试删除第一行。

于 2015-07-20T11:01:24.890 回答
3

基本上您的数据超过 31 个字节，因此您需要将其修剪下来。

将此更改为false，然后它将起作用：

advertiseData.setIncludeDeviceName(false);
于 2017-06-12T10:23:38.790 回答
2

您可以将设备名称更改为更短的名称。示例：XYZ_Name_pic - > XYZ

转到蓝牙->设置->重命名设备名称

或者你可以传递 false 而不是 true

广告数据.setIncludeDeviceName(false); // 传假不真

于 2018-08-02T08:47:04.893 回答