订阅24h功耗器件分解统计事件（ArkTS）

接口说明

API接口的具体使用说明（参数使用限制、具体取值范围等）请参考@ohos.hiviewdfx.hiAppEvent (应用事件打点)ArkTS API文档。

接口名	描述
addWatcher(watcher: Watcher): AppEventPackageHolder	添加应用事件观察者，以添加对应用事件的订阅。
removeWatcher(watcher: Watcher): void	移除应用事件观察者，以移除对应用事件的订阅。

开发步骤

以实现对应用内多线程执行耗时操作生成的24h功耗器件分解统计事件订阅为例，说明开发步骤。

编辑工程中的“entry > src > main > ets > entryability > EntryAbility.ets”文件，在onCreate函数中添加系统事件的订阅，示例代码如下：

import { hiAppEvent, hilog } from '@kit.PerformanceAnalysisKit';

hiAppEvent.addWatcher({
   // 开发者可以自定义观察者名称，系统会使用名称来标识不同的观察者
   name: "watcher",
   // 开发者可以订阅感兴趣的系统事件，此处是订阅了应用24h功耗器件分解统计事件
   appEventFilters: [
     {
       domain: hiAppEvent.domain.OS,
       names: [hiAppEvent.event.BATTERY_USAGE]
     }
   ],
   // 开发者可以自行实现订阅实时回调函数，以便对订阅获取到的事件数据进行自定义处理
   onReceive: (domain: string, appEventGroups: Array<hiAppEvent.AppEventGroup>) => {
     hilog.info(0x0000, 'testTag', `HiAppEvent onReceive: domain=${domain}`);
     for (const eventGroup of appEventGroups) {
       // 开发者可以根据事件集合中的事件名称区分不同的系统事件
       hilog.info(0x0000, 'testTag', `HiAppEvent eventName=${eventGroup.name}`);
       for (const eventInfo of eventGroup.appEventInfos) {
         // 开发者可以对事件集合中的事件数据进行自定义处理，此处是将事件数据打印在日志中
         hilog.info(0x0000, 'testTag', `HiAppEvent eventInfo=${JSON.stringify(eventInfo)}`);
       }
     }
   }
 });

工程中构造高耗电测试场景，并进行相关测试，使设备产生实际耗电，演示示例如下：

开发者自测试可跳过此步骤，仅需完成应用安装后并断开充电（充电状态下测试会导致无数据上报），使用应用5分钟以上。

1）工程中添加“entry > src > main > ets > workers> worker.ets”文件，构造一个死循环，接收到主线程的消息后触发CPU高负载事件，完整示例代码如下

import { worker } from '@kit.ArkTS';

let workerPort = worker.workerPort;
workerPort.onmessage = (message) => {
  eatCpu();
}
function eatCpu(): void {
  let val:number = 0;
  while (true) {
    val++;
  }
}

2）工程中添加“entry > src > main > ets > tester> CpuTester.ets”文件，在CpuTester 类中的start方法中开启多个线程的死循环，以触发多线程的CPU高负载事件，完整示例代码如下：

import { worker } from '@kit.ArkTS';

export default class CpuTester {
  workerInstance: worker.ThreadWorker = new worker.ThreadWorker('entry/ets/workers/worker.ets');
  start(threadNum: number) {
    for (let index = 0; index < threadNum; index++) {
      this.workerInstance = new worker.ThreadWorker('entry/ets/workers/worker.ets');
      this.workerInstance.postMessage('msg');
    }
  }
}

3）编辑工程中的“entry > src > main > ets > pages > Index.ets”文件，添加“CPU加压”按钮并在其onClick函数构造多线程执行死循环，以触发CPU高负载事件，完整示例代码如下：

import CpuTester from '../tester/CpuTester';

@Entry
@Component
struct Index {
  @State message: string = 'Hello World';

  @State enable: boolean = true;

  @State threadNum: number = 5;

  cpuTester: CpuTester = new CpuTester();

build() {
  Row() {
    Column() {
      Text(this.message)
        .fontSize(50)
        .fontWeight(FontWeight.Bold)
      Button('CPU加压')
        .fontSize(18)
        .margin(12)
        .fontWeight(FontWeight.Bold)
        .enabled(this.enable)
        .onClick(() => {
          this.cpuTester.start(this.threadNum);
          this.enable = false;
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}

4）安装运行测试应用到测试机上，断开USB（2in1设备还需要断开充电线）；

5）打开测试应用，然后在应用界面中点击“CPU加压”按钮，持续十分钟，测试过程保持屏幕常亮。

测试完成后连接USB，0点后在Log窗口看到对系统事件数据的处理日志（快速触发上报方式：执行命令hdc shell hidumper -s 1213 -a '--test 1'，进入测试模式不进行时间跳变的校验，然后修改设备时间为下午的11点58分）：

HiAppEvent onReceive: domain=OS
HiAppEvent eventName=BATTERY_USAGE
HiAppEvent eventInfo={"domain":"OS","name":"BATTERY_USAGE","eventType":2,"params":{"audio_background_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"audio_foreground_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"background_usage":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"begin_time":1709654400000,"bundle_name":"com.example.myapplication","bundle_version":"1.0.0","cpu_background_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"cpu_foreground_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,125647],"ddr_background_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"ddr_foreground_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,207],"gps_background_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"gps_foreground_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"sensor_background_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"sensor_foreground_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"display_background_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"display_foreground_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8606],"end_time":1709740800000,"foreground_usage":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,67766],"gpu_background_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"gpu_foreground_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,48],"modem_background_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"modem_foreground_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"others_background_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"others_foreground_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1170],"rom_background_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"rom_foreground_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"time":1709740801326,"wifi_background_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"wifi_foreground_energy":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]}}

接口说明​

开发步骤​

接口说明

开发步骤