Asset Store存储失败，怎么解决？

import { asset } from '@kit.AssetStoreKit'; 
import util from '@ohos.util'; 
 
function stringToArray(str: string): Uint8Array { 
  let textEncoder = new util.TextEncoder(); 
  return textEncoder.encodeInto(str); 
} 
 
function setAttr() { 
  let attr: asset.AssetMap = new Map(); 
  attr.set(asset.Tag.SECRET, stringToArray('demo_pwd')); 
  attr.set(asset.Tag.ALIAS, stringToArray('demo_alias')); 
  attr.set(asset.Tag.ACCESSIBILITY, asset.Accessibility.DEVICE_FIRST_UNLOCKED); 
  attr.set(asset.Tag.DATA_LABEL_NORMAL_1, stringToArray('demo_label')); 
  //attr.set(asset.Tag.DATA_LABEL_CRITICAL_1,stringToArray('value1')) 
  try { 
    asset.add(attr).then(() => { 
      console.info(`Asset added successfully.`); 
    }).catch(() => { 
      console.error(`Failed to add Asset.`); 
    }) 
  } catch (error) { 
    console.error(`Failed to add Asset.`); 
  } 
} 
 
function arrayToString(arr: Uint8Array): string { 
  let textDecoder = util.TextDecoder.create("utf-8", { ignoreBOM: true }); 
  let str = textDecoder.decodeWithStream(arr, { stream: false }) 
  return str; 
} 
 
function getAttr() { 
  let query: asset.AssetMap = new Map(); 
  query.set(asset.Tag.ALIAS, stringToArray('demo_alias')); // 指定了关键资产别名，最多查询到一条满足条件的关键资产 
  query.set(asset.Tag.RETURN_TYPE, asset.ReturnType.ALL);  // 此处表示需要返回关键资产的所有信息，即属性+明文 
  //query.set(asset.Tag.RETURN_TYPE, asset.ReturnType.ATTRIBUTES);  // 此处表示需要返回关键资产的所有信息，即属性 
  try { 
    asset.query(query).then((res: Array<asset.AssetMap>) => { 
      console.info('获取的资产长度为：'+res.length) 
      for (let i = 0; i < res.length; i++) { 
        // 解析密钥 
        let secret: Uint8Array = res[i].get(asset.Tag.SECRET) as Uint8Array; 
        // 将 uint8array 解析为字符串 
        let secretStr: string = arrayToString(secret); 
        console.info('资产信息为：'+secretStr) 
      } 
    }).catch (() => { 
      console.error(`Failed to query Asset.`); 
    }); 
  } catch (error) { 
    console.error(`Failed to query Asset.`); 
  } 
} 
 
@Entry 
@Component 
struct AttrTest { 
  build() { 
    Column(){ 
      Button('设置资产').onClick((event: ClickEvent) => { 
        setAttr() 
      }) 
        .height(100) 
        .width('100%') 
      Button('获取资产').onClick((event: ClickEvent) => { 
        getAttr() 
      }) 
        .height(100) 
        .width('100%') 
    } 
  } 
}
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