通过router或call事件刷新卡片内容

let storage = new LocalStorage();

@Entry(storage)
@Component
struct WidgetCard {
  @LocalStorageProp('detail') detail: string = 'init';

  build() {
    Column() {
      Button('跳转')
        .margin('20%')
        .onClick(() => {
          console.info('postCardAction to EntryAbility');
          postCardAction(this, {
            'action': 'router',
            'abilityName': 'EntryAbility', // 只能跳转到当前应用下的UIAbility
            'params': {
              'detail': 'RouterFromCard'
            }
          });
        })
      Text(`${this.detail}`).margin('20%')
    }
    .width('100%')
    .height('100%')
  }
}

import UIAbility from '@ohos.app.ability.UIAbility';
import formBindingData from '@ohos.app.form.formBindingData';
import formProvider from '@ohos.app.form.formProvider';
import formInfo from '@ohos.app.form.formInfo';

export default class EntryAbility extends UIAbility {
  // 如果UIAbility第一次启动，在收到Router事件后会触发onCreate生命周期回调
  onCreate(want, launchParam) {
    console.info('Want:' + JSON.stringify(want));
    if (want.parameters[formInfo.FormParam.IDENTITY_KEY] !== undefined) {
      let curFormId = want.parameters[formInfo.FormParam.IDENTITY_KEY];
      let message = JSON.parse(want.parameters.params).detail;
      console.info(`UpdateForm formId: ${curFormId}, message: ${message}`);
      let formData = {
        "detail": message + ': onCreate UIAbility.', // 和卡片布局中对应
      };
      let formMsg = formBindingData.createFormBindingData(formData)
      formProvider.updateForm(curFormId, formMsg).then((data) => {
        console.info('updateForm success.' + JSON.stringify(data));
      }).catch((error) => {
        console.error('updateForm failed:' + JSON.stringify(error));
      })
    }
  }
  // 如果UIAbility已在后台运行，在收到Router事件后会触发onNewWant生命周期回调
  onNewWant(want, launchParam) {
    console.info('onNewWant Want:' + JSON.stringify(want));
    if (want.parameters[formInfo.FormParam.IDENTITY_KEY] !== undefined) {
      let curFormId = want.parameters[formInfo.FormParam.IDENTITY_KEY];
      let message = JSON.parse(want.parameters.params).detail;
      console.info(`UpdateForm formId: ${curFormId}, message: ${message}`);
      let formData = {
        "detail": message + ': onNewWant UIAbility.', // 和卡片布局中对应
      };
      let formMsg = formBindingData.createFormBindingData(formData)
      formProvider.updateForm(curFormId, formMsg).then((data) => {
        console.info('updateForm success.' + JSON.stringify(data));
      }).catch((error) => {
        console.error('updateForm failed:' + JSON.stringify(error));
      })
    }
  }

  ...
}

import formBindingData from '@ohos.app.form.formBindingData'; 
import FormExtensionAbility from '@ohos.app.form.FormExtensionAbility';

export default class EntryFormAbility extends FormExtensionAbility {
  onAddForm(want) {
   let formId = want.parameters["ohos.extra.param.key.form_identity"];
   let dataObj1 = {
     "formId": formId
   };
   let obj1 = formBindingData.createFormBindingData(dataObj1);
   return obj1;
 }
    
 ...
};

let storage = new LocalStorage();

@Entry(storage)
@Component
struct WidgetCard {
  @LocalStorageProp('detail') detail: string = 'init';
  @LocalStorageProp('formId') formId: string = '0';

  build() {
    Column() {
      Button('拉至后台')
        .margin('20%')
        .onClick(() => {
          console.info('postCardAction to EntryAbility');
          postCardAction(this, {
            'action': 'call',
            'abilityName': 'EntryAbility', // 只能跳转到当前应用下的UIAbility
            'params': {
              'method': 'funA',
              'formId': this.formId,
              'detail': 'CallFromCard'
            }
          });
        })
      Text(`${this.detail}`).margin('20%')
    }
    .width('100%')
    .height('100%')
  }
}

import UIAbility from '@ohos.app.ability.UIAbility';
import formBindingData from '@ohos.app.form.formBindingData';
import formProvider from '@ohos.app.form.formProvider';
import formInfo from '@ohos.app.form.formInfo';
const MSG_SEND_METHOD: string = 'funA'
 
// 在收到call事件后会触发callee监听的方法
function FunACall(data) {
  // 获取call事件中传递的所有参数
  let params = JSON.parse(data.readString())
  if (params.formId !== undefined) {
    let curFormId = params.formId;
    let message = params.detail;
    console.info(`UpdateForm formId: ${curFormId}, message: ${message}`);
    let formData = {
      "detail": message
    };
    let formMsg = formBindingData.createFormBindingData(formData)
    formProvider.updateForm(curFormId, formMsg).then((data) => {
      console.info('updateForm success.' + JSON.stringify(data));
    }).catch((error) => {
      console.error('updateForm failed:' + JSON.stringify(error));
    })
  }
  return null;
}
export default class EntryAbility extends UIAbility {
  // 如果UIAbility第一次启动，call事件后会触发onCreate生命周期回调
  onCreate(want, launchParam) {
    console.info('Want:' + JSON.stringify(want));
    try {
       // 监听call事件所需的方法
      this.callee.on(MSG_SEND_METHOD, FunACall);
    } catch (error) {
      console.log(`${MSG_SEND_METHOD} register failed with error ${JSON.stringify(error)}`)
    }
  }
  ...
}