HarmonyOS鸿蒙Next中api9获取不到搜索不到蓝牙设备

HarmonyOS鸿蒙Next中api9获取不到搜索不到蓝牙设备 相同的代码纯血鸿蒙可以搜到蓝牙设备，api9获取不到，收不到 bluetoothDeviceFind 的回调用 ohos.bluetoothManager 包调用startBluetoothDiscovery 方法会报错code="-4"，实在不知道怎么解决

import abilityAccessCtrl, { Permissions } from '@ohos.abilityAccessCtrl';
import EntryAbility from '../entryability/EntryAbility';
import bluetooth from '@ohos.bluetooth';
import BluetoothState from '../enum/BluetoothState';
import Logger from './Logger';

export default class BluetoothUtil {
  private static TAG: string = 'BluetoothUtil';
  private static permissions: Permissions[] =
    ['ohos.permission.USE_BLUETOOTH', 'ohos.permission.DISCOVER_BLUETOOTH', 'ohos.permission.LOCATION', 'ohos.permission.APPROXIMATELY_LOCATION'];

  public static startBluetooth() {
    BluetoothUtil.checkPermissions();
  }

  private static checkPermissions() {
    let atManager: abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager();
    atManager.requestPermissionsFromUser(EntryAbility.getInstance()?.context, BluetoothUtil.permissions)
      .then((data) => {
        let allPermissionGrant: boolean = true;

        let grantStatus: number[] = data.authResults;
        let length: number = grantStatus.length;
        for (let i = 0; i < length; i++) {
          if (grantStatus[i] !== 0) {
            allPermissionGrant = false;
            Logger.error(BluetoothUtil.TAG, 'permission denied: ' + BluetoothUtil.permissions[i]);
          }
        }

        if (allPermissionGrant) {
          BluetoothUtil.doStartBluetooth();
        }
      })
      .catch((err) => {
        Logger.error(BluetoothUtil.TAG,
          `Failed to request permissions from user: ` + JSON.stringify(err));
      })
  }

  private static doStartBluetooth() {
    bluetooth.on('stateChange', BluetoothUtil.onStateChange);
    bluetooth.on('bluetoothDeviceFind', BluetoothUtil.onBluetoothDeviceFind);

    if (!BluetoothUtil.isBluetoothOpen()) {
      BluetoothUtil.openBluetooth();
      return
    }

    BluetoothUtil.scanBluetooth();
  }

  private static isBluetoothOpen(): boolean {
    let state = bluetooth.getState();
    if (state == BluetoothState.ON.valueOf()) {
      return true;
    }
    return false;
  }

  private static openBluetooth(): boolean {
    try {
      //https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V2/js-apis-bluetoothmanager-0000001493584248-V2#ZH-CN_TOPIC_0000001574088509__bluetoothstate
      let state = bluetooth.getState();
      if (state !== BluetoothState.TURNING_ON.valueOf() && state !== BluetoothState.ON.valueOf()) {
        bluetooth.enableBluetooth()
      }
      return true;
    } catch (e) {
      Logger.error(BluetoothUtil.TAG, "openBluetooth error: " + JSON.stringify(e));
      return false;
    }
  }

  private static scanBluetooth() {
    try {
      bluetooth.startBluetoothDiscovery();
      Logger.info(BluetoothUtil.TAG, "scanBluetooth succeed");
    } catch (e) {
      Logger.error(BluetoothUtil.TAG, "scanBluetooth error: " + JSON.stringify(e));
    }
  }

  private static onStateChange(data: number) {
    //https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V2/js-apis-bluetoothmanager-0000001493584248-V2#ZH-CN_TOPIC_0000001574088509__bluetoothstate
    if (data != BluetoothState.ON.valueOf()) {
      return
    }
    Logger.info(BluetoothUtil.TAG, 'onStateChange: ' + JSON.stringify(data));
    BluetoothUtil.scanBluetooth();
  }

  private static onBluetoothDeviceFind(data: Array<string>) {
    Logger.info(BluetoothUtil.TAG, 'onBluetoothDeviceFind: ' + JSON.stringify(data));
  }
}