#鸿蒙学习大百科#如果应用有多个UIAbility，如何判断当前app进入了后台的状态?

let AbilityLifecycleCallback: AbilityLifecycleCallback = {
  onAbilityBackground(ability) {
  },
  onAbilityCreate: (ability: UIAbility): void => {
    throw new Error('Function not implemented.');
  },
  onWindowStageCreate: (ability: UIAbility, windowStage: window.WindowStage): void => {
    throw new Error('Function not implemented.');
  },
  onWindowStageActive: (ability: UIAbility, windowStage: window.WindowStage): void => {
    throw new Error('Function not implemented.');
  },
  onWindowStageInactive: (ability: UIAbility, windowStage: window.WindowStage): void => {
    throw new Error('Function not implemented.');
  },
  onWindowStageDestroy: (ability: UIAbility, windowStage: window.WindowStage): void => {
    throw new Error('Function not implemented.');
  },
  onAbilityDestroy: (ability: UIAbility): void => {
    throw new Error('Function not implemented.');
  },
  onAbilityForeground: (ability: UIAbility): void => {
    throw new Error('Function not implemented.');
  },
  onAbilityContinue: (ability: UIAbility): void => {
    throw new Error('Function not implemented.');
  }
}
this.context.getApplicationContext().on("abilityLifecycle",AbilityLifecycleCallback)