蓝牙外设adverse_failed_data_too_large

Question

     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";

    }
};

 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);
 }

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

Answer 1

我怀疑是这行代码引起了麻烦：

advertiseData.setIncludeDeviceName(true);

广告将没有足够的空间容纳设备名和16字节服务UUID。因此，如果您包括上述内容，则添加：

advertiseData.addServiceUuid(new ParcelUuid(serviceUUID)); 

您将得到您描述的错误。试着删除第一行。