如何知道react原生应用程序中的哪个应用程序正在后台使用？

import { AppState } from 'react-native';

const [appState, setAppState] = useState(AppState.currentState);

const handleAppStateChange = (nextAppState) => {
  setAppState(nextAppState);
};

useEffect(() => {
  // 注册AppState监听器
  AppState.addEventListener('change', handleAppStateChange);

  // 在组件卸载时取消监听
  return () => {
    AppState.removeEventListener('change', handleAppStateChange);
  };
}, []);

if (appState === 'active') {
  console.log('应用程序在前台运行');
} else {
  console.log('应用程序在后台运行');
}