HarmonyOS 这个PermissionUtils的工具类，在NEXT中是怎么引用的？

Question

https://blog.51cto.com/u\_16175523/9224579

这个HarmonyOS PermissionUtils的工具类，在NEXT中是怎么引用的？

Answer 1

这个应该是自定义的权限相关的工具类，官方没有提供封装好的，需要自己封装。这边可以提供一个例子，参考一下

import { abilityAccessCtrl, bundleManager, common, PermissionRequestResult, Permissions } from '@kit.AbilityKit';
import { BusinessError } from '@kit.BasicServicesKit';

/**
 * 权限管理工具类
 * 能力：检查权限是否已存在、请求用户授权
 */
class PermissionsUtil {

  /**
   * 校验应用是否被授予权限
   * @param permissions
   * @returns
   */
  async checkPermissions(permissions: Array<Permissions>): Promise<void> {
    let applyResult: boolean = false;
    for (let permission of permissions) {
      let grantStatus: abilityAccessCtrl.GrantStatus = await this.checkAccessToken(permission);
      if (grantStatus === abilityAccessCtrl.GrantStatus.PERMISSION_GRANTED) {
        applyResult = true;
      } else {
        applyResult = false;
      }
    }
    if (!applyResult) {
      this.requestPermissions(permissions);
    }
  }

  async checkAccessToken(permission: Permissions): Promise<abilityAccessCtrl.GrantStatus> {
    let atManager: abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager();
    let grantStatus: abilityAccessCtrl.GrantStatus = abilityAccessCtrl.GrantStatus.PERMISSION_DENIED;

    // 获取应用程序的accessTokenID
    let tokenId: number = 0;
    try {
      let bundleInfo: bundleManager.BundleInfo = await bundleManager.getBundleInfoForSelf(bundleManager.BundleFlag.GET_BUNDLE_INFO_WITH_APPLICATION);
      let appInfo: bundleManager.ApplicationInfo = bundleInfo.appInfo;
      tokenId = appInfo.accessTokenId;
    } catch (error) {
      let err: BusinessError = error as BusinessError;
      console.error(`Failed to get bundle info for self. Code is ${err.code}, message is ${err.message}`);
    }

    // 校验应用是否被授予权限
    try {
      grantStatus = await atManager.checkAccessToken(tokenId, permission);
    } catch (error) {
      let err: BusinessError = error as BusinessError;
      console.error(`Failed to check access token. Code is ${err.code}, message is ${err.message}`);
    }

    return grantStatus;
  }

  /**
   * 申请用户授权
   * @param permissions
   */
  requestPermissions(permissions: Array<Permissions>): void {
    let atManager: abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager();
    atManager.requestPermissionsFromUser(getContext() as common.UIAbilityContext, permissions)
      .then((data: PermissionRequestResult) => {
        console.info('request Permissions success')
      })
      .catch((err: BusinessError) => {
        console.error(`Failed to request permissions from user. Code is ${err.code}, message is ${err.message}`);
      })
  }
}

export default new PermissionsUtil();

使用方法

private permissions: Array<Permissions> = ['ohos.permission.WRITE_IMAGEVIDEO','ohos.permission.READ_IMAGEVIDEO'];

aboutToAppear() {
  PermissionsUtil.checkPermissions(this.permissions)
}