检查某个权限是否已经授权。

/**
 * 检查是否授权
 * @param permission 待检查权限
 * @returns 授权状态
 */
async checkAccessToken(permission: Permissions): Promise<abilityAccessCtrl.GrantStatus> {
  let atManager: abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager();
  let grantStatus: abilityAccessCtrl.GrantStatus = abilityAccessCtrl.GrantStatus.PERMISSION_DENIED;
  let tokenId: number = 0; //获取应用程序的accessTokenID
  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) {
    const err: BusinessError = error as BusinessError;
    // ToastUtil.showToast('获取应用信息失败:' + err.message);
  }
  //校验应用是否被授予权限
  try {
    grantStatus = await atManager.checkAccessToken(tokenId, permission);
  } catch (error) {
    const err: BusinessError = error as BusinessError;
    // ToastUtil.showToast('校验授权信息失败:' + err.message);
  }
  return grantStatus;
}

async checkPermissions(permissions: Permissions): Promise<boolean> {
  let grantStatus: abilityAccessCtrl.GrantStatus = await this.checkAccessToken(permissions);
  if (grantStatus === abilityAccessCtrl.GrantStatus.PERMISSION_GRANTED) { //判断是否授权
    return true; //已经授权
  } else {
    return false; //未授权
  }
}