如何实现应用组件间的信息传递？

import AbilityConstant from '@ohos.app.ability.AbilityConstant';
import UIAbility from '@ohos.app.ability.UIAbility';
import Want from '@ohos.app.ability.Want';
import { BusinessError } from '@ohos.base';

let want: Want = {
deviceId: '', // deviceId为空表示本设备
bundleName: 'com.example.myapplication',
abilityName: 'EntryAbility',
moduleName: 'entry' // moduleName非必选
};
class MyAbility extends UIAbility{
onCreate(want: Want, launchParam: AbilityConstant.LaunchParam){
this.context.startAbility(want, (error: BusinessError) => {
// 显式拉起Ability，通过bundleName、abilityName和moduleName可以唯一确定一个Ability
console.error(`error.code = ${error.code}`);
});
}
}