[Android 12] Foreground Service Takes Time To Show Notification First Time

On Android 12, Notifee’s Foreground Service notification is taking around 10 seconds to show up in status bar. Another problem is that, every notification update wakes up the screen when screen is locked & turned off.

Notifee Version: 4.0.1 React Native: 0.66.4

Here is my App.js file:

import React, {useEffect, useState} from 'react';
import {View, StyleSheet, Button} from 'react-native';
import notifee from '@notifee/react-native';

const NOTIFICATION = {ID: 'id', NAME: 'My Notifications'};

let interval = false;
let timer = 0;

const registerService = () => {
  notifee.createChannel({id: NOTIFICATION.ID, name: NOTIFICATION.NAME});
  notifee.registerForegroundService(notification => {
    return new Promise(() => {
      interval = setInterval(() => {
        timer = timer + 1;
        notifee.displayNotification({
          id: notification.id,
          body: `${timer.toString()}`,
          android: {
            ...notification.android,
          },
        });
      }, 1000);
    });
  });
};

const App = () => {
  const [isRunning, setRunning] = useState(false);

  useEffect(() => {
    registerService();
  }, []);

  const startPress = () => {
    setRunning(bool => !bool);
    notifee.displayNotification({
      title: 'Foreground service',
      body: 'This notification will exist for the lifetime of the service runner',
      android: {
        channelId: NOTIFICATION.ID,
        asForegroundService: true,
      },
    });
  };

  const onCancelPress = async () => {
    setRunning(bool => !bool);
    await notifee.stopForegroundService();
    clearInterval(interval);
  };

  return (
    <View style={styles.screen}>
      <Button
        title={isRunning ? 'Close Notification' : 'Show Notification'}
        onPress={isRunning ? onCancelPress : startPress}
      />
    </View>
  );
};

const styles = StyleSheet.create({
  screen: {flex: 1, justifyContent: 'center', alignItems: 'center'},
});

export default App;

[helenaford]

@mikehardy oh really. wow. just scanned the docs:

Devices that run Android 12 (API level 31) or higher provide a streamlined experience for short-running foreground services. On these devices, the system waits 10 seconds before showing the notification associated with a foreground service. There are a few exceptions; several types of services always display a notification immediately.

a 10-second delay 😱 it states there are exceptions, so maybe there are ways to get around this 🤔 (ref: https://developer.android.com/guide/components/foreground-services#notification-immediate)

[mikehardy]

Very interesting! Android 12 added something specific about foreground notifications for background services, they put a delay in there as users were apparently irritated by notifications briefly appearing and disappearing when background services did a foreground service but were in fact short lived (though long-lived enough they had to do a notification or face a system kill). So this might be related to the new delay they added. I wonder if we need to add a toggle or something saying “no really, show it immediately” ? I haven’t looked at the APIs closely I just remember hearing about the delay they added