ApplicationContext

ApplicationContext模塊提供開(kāi)發(fā)者應(yīng)用級(jí)別的的上下文的能力，包括提供注冊(cè)及取消注冊(cè)應(yīng)用內(nèi)組件生命周期的監(jiān)聽(tīng)接口。

說(shuō)明：
開(kāi)發(fā)前請(qǐng)熟悉鴻蒙開(kāi)發(fā)指導(dǎo)文檔：[gitee.com/li-shizhen-skin/harmony-os/blob/master/README.md]
本模塊首批接口從API version 9開(kāi)始支持。后續(xù)版本的新增接口，采用上角標(biāo)單獨(dú)標(biāo)記接口的起始版本。
本模塊接口僅可在Stage模型下使用。

使用說(shuō)明

在使用ApplicationContext的功能前，需要通過(guò)context的實(shí)例獲取。

let applicationContext = this.context.getApplicationContext();

ApplicationContext.registerAbilityLifecycleCallback

registerAbilityLifecycleCallback(callback: AbilityLifecycleCallback): number ;

注冊(cè)監(jiān)聽(tīng)?wèi)?yīng)用內(nèi)生命周期

系統(tǒng)能力 ：SystemCapability.Ability.AbilityRuntime.Core

參數(shù)：

參數(shù)名	類型	必填	說(shuō)明
[AbilityLifecycleCallback]	callback	是	回調(diào)方法，返回注冊(cè)監(jiān)聽(tīng)事件的id

返回值：

類型	說(shuō)明
number	返回的此次注冊(cè)監(jiān)聽(tīng)生命周期的id（每次注冊(cè)該id會(huì)自增+1，當(dāng)超過(guò)監(jiān)聽(tīng)上限數(shù)量2^63-1時(shí)，返回-1）

示例：

import AbilityStage from "@ohos.application.AbilityStage";

var lifecycleid;

export default class MyAbilityStage extends AbilityStage {
  onCreate() {
      console.log("MyAbilityStage onCreate")
      let AbilityLifecycleCallback  =  {
          onAbilityCreate(ability){
              console.log("AbilityLifecycleCallback onAbilityCreate ability:" + JSON.stringify(ability));        
          },
          onAbilityWindowStageCreate(ability){
              console.log("AbilityLifecycleCallback onAbilityWindowStageCreate ability:" + JSON.stringify(ability));           
          },
          onAbilityWindowStageDestroy(ability){
              console.log("AbilityLifecycleCallback onAbilityWindowStageDestroy ability:" + JSON.stringify(ability));
          },
          onAbilityDestroy(ability){
              console.log("AbilityLifecycleCallback onAbilityDestroy ability:" + JSON.stringify(ability));             
          },
          onAbilityForeground(ability){
              console.log("AbilityLifecycleCallback onAbilityForeground ability:" + JSON.stringify(ability));             
          },
          onAbilityBackground(ability){
              console.log("AbilityLifecycleCallback onAbilityBackground ability:" + JSON.stringify(ability));              
          },
          onAbilityContinue(ability){
              console.log("AbilityLifecycleCallback onAbilityContinue ability:" + JSON.stringify(ability));
          }
      }
      // 1.通過(guò)context屬性獲取applicationContext
      let applicationContext = this.context.getApplicationContext();
      // 2.通過(guò)applicationContext注冊(cè)監(jiān)聽(tīng)?wèi)?yīng)用內(nèi)生命周期
      lifecycleid = applicationContext.registerAbilityLifecycleCallback(AbilityLifecycleCallback);
      console.log("registerAbilityLifecycleCallback number: " + JSON.stringify(lifecycleid));       
  }
  onDestroy() {
      let applicationContext = this.context.getApplicationContext();
      applicationContext.unregisterAbilityLifecycleCallback(lifecycleid, (error, data) = > {
      console.log("unregisterAbilityLifecycleCallback success, err: " + JSON.stringify(error));
      });
  }
}

ApplicationContext.unregisterAbilityLifecycleCallback

unregisterAbilityLifecycleCallback(callbackId: number , callback: AsyncCallback< void >): void ;

取消監(jiān)聽(tīng)?wèi)?yīng)用內(nèi)生命周期

系統(tǒng)能力 ：SystemCapability.Ability.AbilityRuntime.Core

參數(shù)：

參數(shù)名	類型	必填	說(shuō)明
callbackId	number	是	注冊(cè)監(jiān)聽(tīng)?wèi)?yīng)用內(nèi)生命周期的id
AsyncCallback	callback	是	回調(diào)方法

搜狗高速瀏覽器截圖20240326151547.png

示例：

let applicationContext = this.context.getApplicationContext();
let lifecycleid=1
console.log("stage applicationContext: " + JSON.stringify(applicationContext));
applicationContext.unregisterAbilityLifecycleCallback(lifecycleid, (error, data) = > {
    console.log("unregisterAbilityLifecycleCallback success, err: " + JSON.stringify(error));
});

審核編輯黃宇

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