HarmonyOS NEXT 实战之元服务：静态案例效果---我的热门应用服务

背景：

前几篇学习了元服务，后面几期就让我们开发简单的元服务吧，里面丰富的内容大家自己加，本期案例仅供参考

先上本期效果图，里面图片自行替换

在这里插入图片描述

效果图1完整代码案例如下：

Index

import { authentication } from '@kit.AccountKit';
import { BusinessError } from '@kit.BasicServicesKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
import { EventMyItem } from './EventMyItem';

export class ListItem1 {
  img: ResourceStr;
  title: string;
  content: string;
  version: string;

  constructor(img: ResourceStr, title: string, content: string, version: string) {
    this.img = img;
    this.title = title;
    this.content = content;
    this.version = version;
  }
}


@Entry
@Component
struct Index {
  @State message: string = 'Hello World';
  @State listItem1: ListItem1[] = [
    new ListItem1($r('app.media.img'), '我爱我家', '北京我爱我家房地产经纪有限...', '版本6.30.0介绍|隐私」权限'),
    new ListItem1($r('app.media.img_1'), '头条搜索极速版', '北京抖音信息服务有限公司', '版本10.1.3.0|介绍|隐私|权限'),
    new ListItem1($r('app.media.img_2'), '番茄免费小说', '北京臻鼎科技有限公司', '版本6.5.1.32|介绍|隐私」权限'),
    new ListItem1($r('app.media.img_3'), '百度极速版', '百度在线网络技术(北京)有...', '版本6.39.0..介绍」隐私」权限'),
    new ListItem1($r('app.media.img_4'), '上古王冠', '厦门极致互动网络技术股份有...', '版本2.010...介绍」隐私」权限'),
    new ListItem1($r('app.media.img_5'), '途虎养车', '上海阑途信息技术有限公司', '版本7.3.0I介绍隐私」权限'),
    new ListItem1($r('app.media.img_6'), '平安证券(享开户礼包)', '平安证券股份有限公司', '版本10.0.1.1|介绍」隐私」权限'),
    new ListItem1($r('app.media.img_7'), '国泰君安君弘', '国泰君安证券股份有限公司', '版本9.11.30|介绍|隐私|权限'),

  ]
  build() {
    Column() {
      Text($r('app.string.EntryAbility_label')).fontSize(20).margin({ bottom: 10 })
      List({ space: 6 }) {
        ForEach(this.listItem1, (item: ListItem1) => {
          ListItem() {
            EventMyItem({ data: item })
          }

        })


      }

    }
    .alignItems(HorizontalAlign.Start)
    .height('100%')
    .padding(8)
    .width('100%')
    .margin({ top: 40 })
  }

  aboutToAppear() {



    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onCreate');
    this.loginWithHuaweiID();
  }

  /**
   * Sample code for using HUAWEI ID to log in to atomic service.
   * According to the Atomic Service Review Guide, when a atomic service has an account system,
   * the option to log in with a HUAWEI ID must be provided.
   * The following presets the atomic service to use the HUAWEI ID silent login function.
   * To enable the atomic service to log in successfully using the HUAWEI ID, please refer
   * to the HarmonyOS HUAWEI ID Access Guide to configure the client ID and fingerprint certificate.
   */
  private loginWithHuaweiID() {
    // Create a login request and set parameters
    let loginRequest = new authentication.HuaweiIDProvider().createLoginWithHuaweiIDRequest();
    // Whether to forcibly launch the HUAWEI ID login page when the user is not logged in with the HUAWEI ID
    loginRequest.forceLogin = false;
    // Execute login request
    let controller = new authentication.AuthenticationController();
    controller.executeRequest(loginRequest).then((data) => {
      let loginWithHuaweiIDResponse = data as authentication.LoginWithHuaweiIDResponse;
      let authCode = loginWithHuaweiIDResponse.data?.authorizationCode;
      // Send authCode to the backend in exchange for unionID, session

    }).catch((error: BusinessError) => {
      hilog.error(0x0000, 'testTag', 'error: %{public}s', JSON.stringify(error));
      if (error.code == authentication.AuthenticationErrorCode.ACCOUNT_NOT_LOGGED_IN) {
        // HUAWEI ID is not logged in, it is recommended to jump to the login guide page

      }
    });
  }
}

Item

import { ListItem1 } from "./Index"



@ComponentV2
export struct EventMyItem {
  @Param data: ListItem1 = new ListItem1('', '', '', '')

  build() {
    Column() {
      Row({ space: 6 }) {
        Image(this.data.img).width(50).height(50).borderRadius(10)
        Column({ space: 6 }) {
          Text(this.data.title)
            .fontColor('#222222')
            .fontSize(16)
          Text(this.data.content)
            .fontColor('#222222')
            .fontSize(16)
          Text(this.data.version)
            .fontColor('#222222')
            .fontSize(16)
        }.alignItems(HorizontalAlign.Start)

      }.width("100%")
      .justifyContent(FlexAlign.Start)
      .alignItems(VerticalAlign.Top)


      Row() {

        this.textNum(generateFiveDigitRandomNumber() + '', '下载量', Color.Red)
        this.textNum(generateFiveDigitRandomNumber() + '', '上热搜数', '#FFE6960C')


      }
      .width("100%")
      .height(48)
      .justifyContent(FlexAlign.SpaceAround)


      Row() {
        Image($r('app.media.startIcon')).width(28).padding(6).onClick(() => {

        })
        Text(`2024-12-01~${generateRandomDate()}`)
          .fontSize(11)
          .fontColor('#505050')
          .layoutWeight(1)

      }.width("100%")

    }
    .width("100%")
    .margin({ top: 4, bottom: 4 })
    .padding({
      right: 12,
      left: 12,
      top: 8,
      bottom: 6
    })
    .border({ width: 1, radius: 8, color: '#F0F0F0' })
    .linearGradient({
      angle: 45,
      colors: [["#9975E5", 0.1], [Color.White, 0.9]]
    })
  }

  /** isIncrease:参考AdapterMyEvent 90行 when (statisticsEntity.isIncrease) */
  @Builder
  textNum(num: string, text: string, numFontColor: ResourceColor, isIncrease: number = -1) {
    Column() {
      if (isIncrease != -1) {

        Text() {
          Span(num)
          // ImageSpan
        }
        .fontSize(14)
        .fontColor(isIncrease == 1 ? numFontColor : (isIncrease == 2 ? '#0BB746' : '#FFE6960C'))
        .fontWeight(FontWeight.Bold)
      } else {
        Text(num).fontSize(14).fontColor(numFontColor).fontWeight(FontWeight.Bold)
      }
      Text(text).fontSize(10).fontColor('#505050')
    }
  }
}


function generateRandomDate(): string {
  const minYear = 2024; // 最小年份
  const maxYear = 2024; // 最大年份
  const minMonth = 12; // 最小月份
  const maxMonth = 12; // 最大月份
  const minDay = 1; // 最小日期
  const maxDay = 31; // 最大日期

  // 生成随机年份
  const year = Math.floor(Math.random() * (maxYear - minYear + 1)) + minYear;

  // 生成随机月份
  const month = Math.floor(Math.random() * (maxMonth - minMonth + 1)) + minMonth;

  // 根据月份生成合理的日期
  let day = 0;
  if ([1, 3, 5, 7, 8, 10, 12].includes(month)) {
    day = Math.floor(Math.random() * (31 - minDay + 1)) + minDay;
  } else if ([4, 6, 9, 11].includes(month)) {
    day = Math.floor(Math.random() * (30 - minDay + 1)) + minDay;
  } else if (month === 2) {
    // 处理闰年
    if ((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0) {
      day = Math.floor(Math.random() * (29 - minDay + 1)) + minDay;
    } else {
      day = Math.floor(Math.random() * (28 - minDay + 1)) + minDay;
    }
  }

  // 返回格式化的日期字符串
  return `${year}-${String(month).padStart(2, '0')}-${String(day).padStart(2, '0')}`;
}


function generateFiveDigitRandomNumber(): number {
  const min = 100; // 五位数的最小值
  const max = 999; // 五位数的最大值
  return Math.floor(Math.random() * (max - min + 1)) + min;
}