Expo

import * as TaskManager from 'expo-task-manager';
import * as BackgroundFetch from 'expo-background-fetch';

const BACKGROUND_FETCH_TASK = 'background-fetch-task';

TaskManager.defineTask(BACKGROUND_FETCH_TASK, async () => {
  try {
    // 이곳에 백그라운드에서 실행할 코드를 작성합니다.
    console.log('Background fetch task executed');

    // 성공적으로 완료되었음을 알립니다.
    return BackgroundFetch.BackgroundFetchResult.NewData;
  } catch (error) {
    // 오류가 발생했음을 알립니다.
    return BackgroundFetch.BackgroundFetchResult.Failed;
  }
});

const registerBackgroundFetchAsync = async () => {
  return BackgroundFetch.registerTaskAsync(BACKGROUND_FETCH_TASK, {
    minimumInterval: 15, // 작업이 실행될 최소 간격 (초 단위)
    stopOnTerminate: false, // 앱이 종료되어도 작업을 멈추지 않음
    startOnBoot: true, // 기기가 부팅되면 작업 시작
  });
};

const unregisterBackgroundFetchAsync = async () => {
  return BackgroundFetch.unregisterTaskAsync(BACKGROUND_FETCH_TASK);
};

export { registerBackgroundFetchAsync, unregisterBackgroundFetchAsync };

import React, { useEffect } from 'react';
import { Text, View } from 'react-native';
import { registerBackgroundFetchAsync } from './taskManager';

export default function App() {
  useEffect(() => {
    const initBackgroundFetch = async () => {
      await registerBackgroundFetchAsync();
    };

    initBackgroundFetch();
  }, []);

  return (
    <View style=>
      <Text>Background Task Example</Text>
    </View>
  );
}

import * as Notifications from 'expo-notifications';
import * as Permissions from 'expo-permissions';

const scheduleNotification = async () => {
  // 알림 권한 요청
  const { status } = await Permissions.askAsync(Permissions.NOTIFICATIONS);

  if (status !== 'granted') {
    alert('Notification permissions not granted!');
    return;
  }

  // 알림 스케줄
  await Notifications.scheduleNotificationAsync({
    content: {
      title: "Background Task",
      body: "The app is running in the background.",
    },
    trigger: null, // 즉시 알림
  });
};

export { scheduleNotification };

import * as TaskManager from 'expo-task-manager';
import * as BackgroundFetch from 'expo-background-fetch';
import { scheduleNotification } from './notifications';

const BACKGROUND_FETCH_TASK = 'background-fetch-task';

TaskManager.defineTask(BACKGROUND_FETCH_TASK, async () => {
  try {
    // 백그라운드에서 실행할 코드
    console.log('Background fetch task executed');

    // 알림 스케줄
    await scheduleNotification();

    // 성공적으로 완료됨
    return BackgroundFetch.BackgroundFetchResult.NewData;
  } catch (error) {
    // 오류 발생
    return BackgroundFetch.BackgroundFetchResult.Failed;
  }
});