How do I schedule a notification in Flutter?

Question

Im using the flutter_local_notifications package and im trying to schedule a notification in my Android device.

I successfully created a notification using this package but neither of the scheduled ones seems to work for me

My AndroidManifest.xml looks like this:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="...">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.VIBRATE" />

<receiver android:name="com.dexterous.flutterlocalnotifications.ScheduledNotificationReceiver" />
<receiver android:name="com.dexterous.flutterlocalnotifications.ScheduledNotificationBootReceiver">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED"></action>
    </intent-filter>
</receiver>
<application
    android:name="io.flutter.app.FlutterApplication"
    android:label="notificaciones"
    android:icon="@mipmap/ic_launcher">
    <activity
        android:name=".MainActivity"
        android:launchMode="singleTop"
        android:theme="@style/LaunchTheme"
        android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density"
        android:hardwareAccelerated="true"
        android:windowSoftInputMode="adjustResize">
        <meta-data
            android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"
            android:value="true" />
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>
</application>

I added android.enableAapt2=false to the gradle.properties due to

AAPT: error: unknown element <receiver> found as mentioned in this thread to avoid a build error.

My code looks like this:

import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: new MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {

  @override
  _MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin;

  Future onSelectNotification(String payload) {
    showDialog(
        context: context,
        builder: (_) => AlertDialog(
              title: Text("ALERT"),
              content: Text("CONTENT: $payload"),
            ));
  }

  showNotification() async {
    var android = AndroidNotificationDetails(
        'channel id', 'channel name', 'channel description');
    var iOS = IOSNotificationDetails();
    var platform = NotificationDetails(android, iOS);
    var scheduledNotificationDateTime =
        new DateTime.now().add(Duration(seconds: 10));
    await flutterLocalNotificationsPlugin.schedule(0, 'Title ', 'Body', scheduledNotificationDateTime, platform);
  }

  @override
  void initState() {
    super.initState();
    flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
    var android = AndroidInitializationSettings('@mipmap/ic_launcher');
    var iOS = IOSInitializationSettings();
    var initSettings = InitializationSettings(android, iOS);
    flutterLocalNotificationsPlugin.initialize(initSettings,
        selectNotification: onSelectNotification);
  }

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Demo"),
      ),
      body: new Center(
        child: new Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[],
        ),
      ),
      floatingActionButton: new FloatingActionButton(
        onPressed: showNotification,
        child: new Icon(Icons.notifications),
      ),
    );
  }
}

read https://developer.android.com/guide/topics/manifest/receiver-element carefully — pskink, Oct 12 '18 at 13:56
@pskink Thank you, I moved the receiver inside the application and, although the IDE notifies it as an error, this works like a charm. (I removed the android.enableAapt2=false too) — Daniel Castro Fernández, Oct 12 '18 at 14:03
good, i have no idea why IDE notifies it as an error though... — pskink, Oct 12 '18 at 14:04

score 15 · Accepted Answer · answered Oct 12 '18 at 14:07

Thanks to @pskink , I realized that I am supposed to put the receiver of the AndroidManifest.xml inside the application tag.

So the final AndroidManifest.xml stands like this:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="...">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.VIBRATE" />
<application
    android:name="io.flutter.app.FlutterApplication"
    android:label="notificaciones"
    android:icon="@mipmap/ic_launcher">
    <receiver android:name="com.dexterous.flutterlocalnotifications.ScheduledNotificationReceiver" />
    <receiver android:name="com.dexterous.flutterlocalnotifications.ScheduledNotificationBootReceiver">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED"></action>
        </intent-filter>
    </receiver>
    <activity
        android:name=".MainActivity"
        android:launchMode="singleTop"
        android:theme="@style/LaunchTheme"
        android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density"
        android:hardwareAccelerated="true"
        android:windowSoftInputMode="adjustResize">
        <meta-data
            android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"
            android:value="true" />
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>
</application>

and theandroid.enableAapt2=false in the gradle.properties is not needed anymore. The rest of the code stays as it is.

Yes exactly. apart from these, we can add permission to wake up from lock — Jasurbek, Apr 01 '20 at 16:16

How do I schedule a notification in Flutter?

1 Answers1

Linked