网站设计开发项目书网络营销策划步骤
3.创建其他应用或其他Module的Context
基类Context提供创建其他应用或其他Module的Context的方法为createModuleContext(moduleName:string)，创建其他应用或者其他Module的Context，从而通过该Context获取相应的资源信息（例如获取其他Module的获取应用开发路径信息）。
调用createModuleContext(moduleName:string)方法，获取本应用中其他Module的Context。获取到其他Module的Context之后，即可获取到相应Module的资源信息。
import UIAbility from '@ohos.app.ability.UIAbility';export default class EntryAbility extends UIAbility {onCreate(want, launchParam) {let moduleName2 = "module1";let context2 = this.context.createModuleContext(moduleName2);// ...}
}
4.订阅进程内Ability生命周期变化
在应用内的DFX统计场景，如需要统计对应页面停留时间和访问频率等信息，可以使用订阅进程内Ability生命周期变化功能。
在进程内Ability生命周期变化时，如创建、可见/不可见、获焦/失焦、销毁等，会触发进入相应的回调，其中返回的此次注册监听生命周期的ID（每次注册该ID会自增+1，当超过监听上限数量2^63-1时，返回-1），以在UIAbilityContext中使用为例进行说明。
import UIAbility from '@ohos.app.ability.UIAbility';
import Window from '@ohos.window';const TAG: string = "[Example].[Entry].[EntryAbility]";export default class EntryAbility extends UIAbility {lifecycleId: number;onCreate(want, launchParam) {let abilityLifecycleCallback = {onAbilityCreate(ability) {console.info(TAG, "onAbilityCreate ability:" + JSON.stringify(ability));},onWindowStageCreate(ability, windowStage) {console.info(TAG, "onWindowStageCreate ability:" + JSON.stringify(ability));console.info(TAG, "onWindowStageCreate windowStage:" + JSON.stringify(windowStage));},onWindowStageActive(ability, windowStage) {console.info(TAG, "onWindowStageActive ability:" + JSON.stringify(ability));console.info(TAG, "onWindowStageActive windowStage:" + JSON.stringify(windowStage));},onWindowStageInactive(ability, windowStage) {console.info(TAG, "onWindowStageInactive ability:" + JSON.stringify(ability));console.info(TAG, "onWindowStageInactive windowStage:" + JSON.stringify(windowStage));},onWindowStageDestroy(ability, windowStage) {console.info(TAG, "onWindowStageDestroy ability:" + JSON.stringify(ability));console.info(TAG, "onWindowStageDestroy windowStage:" + JSON.stringify(windowStage));},onAbilityDestroy(ability) {console.info(TAG, "onAbilityDestroy ability:" + JSON.stringify(ability));},onAbilityForeground(ability) {console.info(TAG, "onAbilityForeground ability:" + JSON.stringify(ability));},onAbilityBackground(ability) {console.info(TAG, "onAbilityBackground ability:" + JSON.stringify(ability));},onAbilityContinue(ability) {console.info(TAG, "onAbilityContinue ability:" + JSON.stringify(ability));}}// 1. 通过context属性获取applicationContextlet applicationContext = this.context.getApplicationContext();// 2. 通过applicationContext注册监听应用内生命周期this.lifecycleId = applicationContext.on("abilityLifecycle", abilityLifecycleCallback);console.info(TAG, "register callback number: " + JSON.stringify(this.lifecycleId));}onDestroy() {let applicationContext = this.context.getApplicationContext();applicationContext.off("abilityLifecycle", this.lifecycleId, (error, data) => {console.info(TAG, "unregister callback success, err: " + JSON.stringify(error));});}
}