HarmonyOS 调用killAllProcesses退出应用，并杀掉进程接口，应用界面会闪烁，退出动画也不流畅

可以试试使用UIAbilityContext.terminateSelf退出当前应用，killAllProcesses是找出应用下面所有的进程，逐个kill掉。terminateSelf是走UIAbility的正常生命周期，正常销毁。terminateSelf API文档：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-inner-application-uiabilitycontext-V5#uiabilitycontextterminateself可以先使用terminateSelf关闭页面，然后在回调中执行killAllProcesses，在后台杀掉所有进程。这样退出应用就会丝滑很多，示例如下：

import common from '@ohos.app.ability.common';
import { BusinessError } from '@kit.BasicServicesKit';

@Entry
@Component
struct WebViewPage {
  private context = getContext(this) as common.UIAbilityContext
  build() {
    Row() {
      Column() {
        Button('退出')
          .onClick(()=>{
            try {
              this.context.terminateSelf((err: BusinessError) => {
                if (err.code) {
                  // 处理业务逻辑错误
                  console.error(`terminateSelf failed, code is ${err.code}, message is ${err.message}`);
                  return;
                }
                // 执行正常业务
                let applicationContext = this.context.getApplicationContext();
                applicationContext.killAllProcesses()
                console.info('terminateSelf succeed');
              });
            } catch (err) {
              // 捕获同步的参数错误
              let code = (err as BusinessError).code;
              let message = (err as BusinessError).message;
              console.error(`terminateSelf failed, code is ${code}, message is ${message}`);
            }
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}

应用退出后，再立刻点击桌面图片后，应用可能无法启动，是因为调用terminateSelf接口后，任务中心的任务默认不会清理，如需清理，需要配置removeMissionAfterTerminate为true。需要在module.json5下配置此属性，参考文档：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/module-configuration-file-V5#abilities%E6%A0%87%E7%AD%BE

// mudule.json5
{
  "module": {
  ......
  "abilities":  [
  .......
  "removeMissionAfterTerminate": true
  ]
}
}