可能的原因是调用stopAdvertisingSet()方法后仍然继续广告，这可能是由于Android BLE库的一个Bug或者在代码实现中没有正确调用stopAdvertisingSet()方法。以下是一些可能有用的步骤来解决该问题：

1. 在调用stopAdvertisingSet()方法后，请在回调函数onAdvertisingDataSet()中添加日志语句以确保广告已停止。

mBluetoothLeAdvertiser.stopAdvertisingSet(mAdvCallback);

...

@Override

public void onAdvertisingDataSet(AdvertisingSet advertisingSet, int txPower, AdvertisingSetCallback .AdvertisingSetCallbackErrorCode status) {

  Log.i(TAG, "Advertising data set: status=" + status); 

  if (status == AdvertisingSetCallback.ADVERTISE_FAILED_ALREADY_STARTED) { 

      Log.e(TAG, "Advertise failed already started"); 

  } else { 

      Log.i(TAG, "Advertisement stopped"); 

  } 

}

2. 如果仍然存在问题，请尝试在调用startAdvertisingSet()方法之前对其进行清除，如下所示：

mBluetoothLeAdvertiser.getOwnBluetoothAddress();

mBluetoothLeAdvertiser.clearAdvertisingSets();

...

AdvertisingSetParameters parameters = new AdvertisingSetParameters.Builder()

  .setLegacyMode(true) 

  .setConnectable(true) 

  .setIncludeTxPowerLevel(true) 

  .build(); 

AdvertiseData data = new AdvertiseData.Builder()

  .setIncludeDeviceName(true) 

  .setIncludeTxPowerLevel(true) 

  .build(); 

mBluetoothLeAdvertiser.startAdvertisingSet(parameters, data, null, null, null, mAdvCallback);

3. 最后，确保您的设备支持BLE 5.0，并运行最新版本的Android操作系统。

通过上面的步骤，您可以将Android BLE stopAdvertisingSet()方法正常工作。