一、创建项目 基于DevEco Studio的OpenHarmony应用原子化服务（元服务）入门教程-开源基础软件社区基于DevEco Studio的OpenHarmony应用原子化服务（元服务）入门

一、创建项目

二、创建卡片

三、应用服务代码

Index.ets

@Entry
@Component
struct Index {
  @State TITLE: string = 'OpenHarmony';
  @State CONTEXT: string = '创新召见未来！';

  build() {
    Row() {
      Column() {
        Text(this.TITLE)
          .fontSize(30)
          .fontColor(0xFEFEFE)
          .fontWeight(600)
        Text(this.CONTEXT)
          .fontSize(30)
          .fontColor(0xFEFEFE)
          .fontWeight(600)
          .margin(20)
      }
      .width('100%')
    }
    .width('100%')
    .height('100%')
    .backgroundColor(0x42218c)

  }
}

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四、卡片代码
WidgetNewCard.ets

@Entry
@Component
struct WidgetNewCard {
  /*
   * The title.
   */
  readonly TITLE: string = 'OpenHarmony';
  readonly CONTEXT: string = '技术构建万物智联';
  /*
   * The action type.
   */
  readonly ACTION_TYPE: string = 'router';

  /*
   * The ability name.
   */
  readonly ABILITY_NAME: string = 'EntryAbility';

  /*
   * The message.
   */
  readonly MESSAGE: string = 'add detail';

  /*
   * The with percentage setting.
   */
  readonly FULL_WIDTH_PERCENT: string = '100%';

  /*
   * The height percentage setting.
   */
  readonly FULL_HEIGHT_PERCENT: string = '100%';

  build() {
    Row() {
      Column() {
        Text(this.TITLE)
          .fontSize(14)
          .fontColor(0xFEFEFE)
          .fontWeight(600)
        Text(this.CONTEXT)
          .fontSize(14)
          .fontColor(0xFEFEFE)
          .fontWeight(600)
      }
      .width(this.FULL_WIDTH_PERCENT)
    }
    .backgroundColor(0x42218c)
    .height(this.FULL_HEIGHT_PERCENT)
    .onClick(() => {
      postCardAction(this, {
        "action": this.ACTION_TYPE,
        "abilityName": this.ABILITY_NAME,
        "params": {
          "message": this.MESSAGE
        }
      });
    })
  }
}

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五、运行案例

六、案例卡片效果

注释说明：

现最新版的DevEco Studio中OpenHarmony项目在本目录下调整。将runtimeOS:””中间内容调为OpenHarmony即可。这种方式，不用开发板，通过预览器就可以查看项目样式效果。

完整项目代码地址：

https://gitee.com/jltfcloudcn/jump_to/tree/master/MyApplicationOH