# ProcessData 进程数据的对象定义。使用接口[registerApplicationStateObserver](js-apis-application-appManager.md#appmanagerregisterapplicationstateobserver8)注册生命周期变化监听后,当应用或组件的生命周期变化时,系统通过[ApplicationStateObserver](js-apis-inner-application-applicationStateObserver.md)的onProcessCreated等方法回调给开发者。 **系统能力**:以下各项对应的系统能力均为SystemCapability.Ability.AbilityRuntime.Core **系统API**:该接口为系统接口,三方应用不支持调用。 | 名称 | 类型 | 可读 | 可写 | 说明 | | ----------------------- | ---------| ---- | ---- | ------------------------- | | pid8+ | number | 是 | 否 | 进程ID。 | | bundleName8+ | string | 是 | 否 | 应用包名。 | | uid8+ | number | 是 | 否 | 应用的uid。 | | isContinuousTask9+ | boolean | 是 | 否 | 是否为长时任务,true表示是,false表示不是 | | isKeepAlive9+ | boolean | 是 | 否 | 是否为常驻进程,true表示是,false表示不是 | | state9+ | number | 是 | 否 | 应用的状态,取值及对应的状态为:0(刚创建),2(前台),4(后台),5(已终止)。 | **示例:** ```ts import appManager from '@ohos.app.ability.appManager'; let applicationStateObserver = { onForegroundApplicationChanged(appStateData) { console.log('onForegroundApplicationChanged appStateData: ${JSON.stringify(appStateData)}'); }, onAbilityStateChanged(abilityStateData) { console.log('onAbilityStateChanged onAbilityStateChanged: ${JSON.stringify(abilityStateData)}'); }, onProcessCreated(processData) { console.log('onProcessCreated onProcessCreated: ${JSON.stringify(processData)}'); }, onProcessDied(processData) { console.log('onProcessDied onProcessDied: ${JSON.stringify(processData)}'); }, onProcessStateChanged(processData) { console.log('onProcessStateChanged processData.pid : ${JSON.stringify(processData.pid)}'); console.log('onProcessStateChanged processData.bundleName : ${JSON.stringify(processData.bundleName)}'); console.log('onProcessStateChanged processData.uid : ${JSON.stringify(processData.uid)}'); console.log('onProcessStateChanged processData.isContinuousTask : ${JSON.stringify(processData.isContinuousTask)}'); console.log('onProcessStateChanged processData.isKeepAlive : ${JSON.stringify(processData.isKeepAlive)}'); } } let observerCode = appManager.registerApplicationStateObserver(applicationStateObserver); ```