纯血的鸿蒙手表应用能否在后台持续保持蓝牙连接

"requestPermissions": [
   {
     "name": "ohos.permission.KEEP_BACKGROUND_RUNNING"
   }
]

"module": {
   "abilities": [
       {
           "backgroundModes": [
            // 配置长时任务类型为蓝牙传输
           "bluetoothInteraction"
           ]
       }
   ],
   // ...
}

import { backgroundTaskManager } from '@kit.BackgroundTasksKit';
import { AbilityConstant, UIAbility, Want } from '@kit.AbilityKit';
import { wantAgent, WantAgent } from '@kit.AbilityKit';
import { ble } from '@kit.ConnectivityKit';

import { bundleManager, wantAgent } from '@kit.AbilityKit'
import { ble } from '@kit.ConnectivityKit'
import { backgroundTaskManager } from '@kit.BackgroundTasksKit'

class BackgroundRunningManager {
  // 申请长时任务
  async startBackgroundRunning() {
    // 获取bundle应用信息
    const bundleInfo = bundleManager.getBundleInfoForSelfSync(bundleManager.BundleFlag.GET_BUNDLE_INFO_WITH_APPLICATION)
    // 通过wantAgent模块下getWantAgent方法获取WantAgent对象
    const wantAgentObj = await wantAgent.getWantAgent({
      // 添加需要被拉起应用的bundleName和abilityName
      wants: [{ bundleName: bundleInfo.name, abilityName: "EntryAbility" }],
      // 使用者自定义的一个私有值
      requestCode: 0,
      actionFlags: [wantAgent.WantAgentFlags.UPDATE_PRESENT_FLAG],
      // 车钥匙长时任务子类型。只有申请bluetoothInteraction类型的长时任务，车钥匙子类型才能生效。
      // 确保extraInfo参数中的Key值为backgroundTaskManager.BackgroundModeType.SUB_MODE，否则子类型不生效。
      extraInfo: { [backgroundTaskManager.BackgroundModeType.SUB_MODE] : backgroundTaskManager.BackgroundSubMode.CAR_KEY }
    })
    // 创建类型为BLUETOOTH_INTERACTION的后台任务
    await backgroundTaskManager.startBackgroundRunning(context,backgroundTaskManager.BackgroundMode.BLUETOOTH_INTERACTION, wantAgentObj)
  }

  // 停止后台任务
  async stopBackgroundRunning() {
    backgroundTaskManager.stopBackgroundRunning(getContext())
  }
}