实现一个发送进度条通知的方法

// NotificationUtil.ets
import { notificationManager } from '@kit.NotificationKit';

// 获取应用的Want信息
export function createWantAgent(bundleName: string, abilityName: string): Promise<object> {
  let wantAgentInfo = {
    wants: [
      {
        bundleName: bundleName,
        abilityName: abilityName
      }
    ],
    operationType: wantAgent.OperationType.START_ABILITY,
    requestCode: 0,
    wantAgentFlags: [wantAgent.WantAgentFlags.CONSTANT_FLAG]
  } as wantAgent.WantAgentInfo;
  return wantAgent.getWantAgent(wantAgentInfo);
}

// 发布通知
export function publishNotification(progress: number, title: string, wantAgentObj: object) {
  // 构造通知模板对象
  let template:notificationManager.NotificationTemplate = {
    name: 'downloadTemplate',
    data: {
      progressValue: progress,
      progressMaxValue: CommonConstants.PROGRESS_TOTAL,
      isProgressIndeterminate: false
    }
  };
  // 构造NotificationRequest对象
  let notificationRequest: notificationManager.NotificationRequest = {
    id: CommonConstants.NOTIFICATION_ID,
    notificationSlotType: notificationManager.SlotType.CONTENT_INFORMATION,
    // 模板对象
    template: template,
    content: {
      notificationContentType: notificationManager.ContentType.NOTIFICATION_CONTENT_BASIC_TEXT,
      normal: {
        title: `${title}：${CommonConstants.DOWNLOAD_FILE}`,
        text: ' ',
        additionalText: `${progress}%`
      }
    },
    // 点击拉起应用的Want信息
    wantAgent: wantAgentObj
  };
  // 发送通知
  notificationManager.publish(notificationRequest).catch((err: Error) => {
    Logger.error(`[ANS] publish failed,message is ${err}`);
  });
}