HarmonyOS 无法获取固定设备id？

Question

如题：HarmonyOS 无法获取固定设备id？

Answer 1

AssetStore.ets 存取可能存在问题。建议自行排查一下。

参考链接：

https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/asset-store-api-V5

Index.ets

import { HttpHeaderInfo } from '../data/HttpHeaderInfo';
import { AssetStore } from './AssetStore';
import hilog from '@ohos.hilog';
import util from '@ohos.util';
import { Save, Query } from './Save';

@Entry
@Component
struct GuideHelloPage {
  private static deviceIdCacheKey = "device_id_cache_key"
  private static deviceId = ""
  // private userModel: UserModel = UserModel.getInstance();
  @Prop widthSize: number = 167;
  @Prop heightSize: number = 53;

  // @StorageProp(EnvironmentUtils.key_colorMode) colorMode: ColorMode = ColorMode.LIGHT
  static async getDeviceId() {
    let deviceId = GuideHelloPage.deviceId


    //如果内存缓存为空，则从AssetStore中读取
    if (!deviceId) {
      // deviceId = `${(await AssetStore.get(GuideHelloPage.deviceIdCacheKey)).data}`
      deviceId = await Query.query1(GuideHelloPage.deviceIdCacheKey)
      hilog.info(0x0000, 'testTag', '%{public}s', `get oaid failed, deviceId: ${deviceId}`);
    }

    //如果AssetStore中未读取到，则随机生成32位随机码，然后缓存到AssetStore中
    if (!deviceId || deviceId === "undefined") {
      deviceId = util.generateRandomUUID(true).replace('-', '')
      // AssetStore.set(GuideHelloPage.deviceIdCacheKey, deviceId)
      Save.save(GuideHelloPage.deviceIdCacheKey,deviceId)
      hilog.info(0x0000, 'testTag', '%{public}s', `get 22, deviceId: ${deviceId}`);
    }


    GuideHelloPage.deviceId = deviceId
    hilog.info(0x0000, 'testTag', '%{public}s', `get 33, deviceId: ${deviceId}`);
    return deviceId
  }

  build() {
    Row() {
      Column() {

        Text("添加")
          .fontWeight(FontWeight.Bold)
          .fontColor("#ff09181f")
          .fontStyle(FontStyle.Italic)
          .onClick(() => {
            Save.save('a', '2')
          })

        Text("查询")
          .fontWeight(FontWeight.Bold)
          .fontColor("#ff09181f")
          .fontStyle(FontStyle.Italic)
          .onClick(async () => {
            let a :string = await Query.query1('a')
            console.info('--------------:' + a)
          })


        Text("Hi")
          .fontSize(23)
          .fontWeight(FontWeight.Bold)
          .fontColor("#ff09181f")
          .fontStyle(FontStyle.Italic)
        Text("我是Moo")
          .grayTextStyle()

        Text("初来乍到")
          .grayTextStyle()

        Text("要给我讲讲你的故事吗")
          .grayTextStyle()
        Text("…")
          .fontSize(17)
          .margin({ top: 10 })
          .fontWeight(FontWeight.Normal)
          .fontColor("#ff09181f")
          .fontStyle(FontStyle.Italic)

        Button("打开我的日记")
          .fontSize(16)
          .size({ width: this.widthSize, height: this.heightSize })
          .fontColor(Color.Red)
          .margin({ top: 10 })
          .backgroundColor("#36D")
          .onClick(async (event: ClickEvent) => {
            let res:string =  await GuideHelloPage.getDeviceId()
            console.info(`设备id： ${res}`)
          })

        Button("登录个人账号")
          .fontSize(16)
          .size({ width: this.widthSize, height: this.heightSize })
          .fontColor(Color.Red)
          .margin({ top: 10 })
          .borderColor("#36D")
          .backgroundColor("#fffff")
          .borderWidth(1.67)

      }
      .width('100%')
    }
    .height('100%')
  }
}

@Extend(Text)
function grayTextStyle() {
  .fontSize(17)
  .fontColor("#ff09181f")
  .margin({ top: 10 })
  .fontWeight(FontWeight.Bold)
  .fontStyle(FontStyle.Italic)
}

Save.ets

import { asset } from '@kit.AssetStoreKit';
import { util } from '@kit.ArkTS';
import { BusinessError } from '@kit.BasicServicesKit';

function stringToArray(str: string): Uint8Array {
  let textEncoder = new util.TextEncoder();
  return textEncoder.encodeInto(str);
}

function arrayToString(arr: Uint8Array): string {
  let textDecoder = util.TextDecoder.create("utf-8", { ignoreBOM: true });
  let str = textDecoder.decodeWithStream(arr, { stream: false })
  return str;
}


export class Save {
  static save(key: string, value: string) {
    let attr: asset.AssetMap = new Map();
    // 关键资产别名，每条关键资产的唯一索引。
    // 类型为Uint8Array，长度为1-256字节。
    attr.set(asset.Tag.ALIAS, stringToArray(key));
    // 关键资产明文。
    // 类型为Uint8Array，长度为1-1024字节
    attr.set(asset.Tag.SECRET, stringToArray(value));

    // 关键资产同步类型>THIS_DEVICE只在本设备进行同步，如仅在本设备还原的备份场景。
    // attr.set(asset.Tag.SYNC_TYPE, asset.SyncType.THIS_DEVICE);

    //枚举，新增关键资产时的冲突（如：别名相同）处理策略。OVERWRITE》抛出异常，由业务进行后续处理。
    // attr.set(asset.Tag.CONFLICT_RESOLUTION, asset.ConflictResolution.THROW_ERROR)
    // 在应用卸载时是否需要保留关键资产。
    // 需要权限： ohos.permission.STORE_PERSISTENT_DATA。
    // 类型为bool。
    // if (true) {
    //   attr.set(asset.Tag.IS_PERSISTENT, true);
    // }
    try {
      asset.add(attr).then(() => {
        console.info(`Asset added successfully.`);
      }).catch((err: BusinessError) => {
        console.error(`Failed to add Asset. Code is ${err.code}, message is ${err.message}`);
      })
    } catch (error) {
      let err = error as BusinessError;
      console.error(`Failed to add Asset. Code is ${err.code}, message is ${err.message}`);
    }
  }
}


export class Query {
  static value: string = ''

  static async query1(key: string): Promise<string> {
    let query: asset.AssetMap = new Map();
    query.set(asset.Tag.ALIAS, stringToArray(key)); // 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
    try {
      await asset.query(query).then((res: Array<asset.AssetMap>) => {
        for (let i = 0; i < res.length; i++) {
          // parse the secret.
          let secret: Uint8Array = res[i].get(asset.Tag.SECRET) as Uint8Array;
          // parse uint8array to string
          let secretStr: string = arrayToString(secret);
          Query.value = secretStr
          console.info(secretStr)
        }
      }).catch((err: BusinessError) => {
        console.error(`Failed to query Asset. Code is ${err.code}, message is ${err.message}`);
      });
    } catch (error) {
      let err = error as BusinessError;
      console.error(`Failed to query Asset. Code is ${err.code}, message is ${err.message}`);
    }

    return Query.value
  }
}