如果你的需求是后台触发状态变化后更新页面 UI，而不是通过页面跳转传递数据，可以通过以下方式实现：
通过自定义事件管理器，后台触发事件后通知页面更新 UI。

1、定义全局事件管理器

// EventManager.ts
type EventHandler = (data: uiltin">any) => void;class EventManager {private events: Map<uiltin">string, EventHandler[]> = new Map();// 订阅事件on(eventName: uiltin">string, handler: EventHandler) {if (!this.events.has(eventName)) {this.events.set(eventName, []);}this.events.get(eventName)?.push(handler);}// 取消订阅off(eventName: uiltin">string, handler?: EventHandler) {if (handler) {const handlers = this.events.get(eventName)?.filter(h => h !== handler);if (handlers) {this.events.set(eventName, handlers);}} else {this.events.delete(eventName);}}// 发布事件emit(eventName: uiltin">string, data?: uiltin">any) {const handlers = this.events.get(eventName);if (handlers) {handlers.forEach(handler => handler(data));}}
}export const eventManager = new EventManager();

2、触发事件

// 后台逻辑（如 Service 或定时任务）
import { eventManager } from './EventManager';eventManager.emit('updateUI', { message: 'New message from background!' });

3、页面监听事件

// Page.ets
import { eventManager } from './EventManager';@Entry
@Component
struct Page {@State message: uiltin">string = 'Waiting for message...';aboutToAppear() {// 订阅事件eventManager.on('updateUI', (data) => {this.message = data.message; // 更新状态});}aboutToDisappear() {// 取消订阅eventManager.off('updateUI');}build() {Column() {Text(this.message).fontSize(20).margin(20);}.width('100%').height('100%').justifyContent(FlexAlign.Center);}
}