this is my local_notification_settings.dart
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
class LocalNotificationService{
static final FlutterLocalNotificationsPlugin _notificationsPlugin = FlutterLocalNotificationsPlugin();
static void initialize(){
final InitializationSettings initializationSettings =
InitializationSettings(
android: AndroidInitializationSettings('@mipmap/ic_launcher'));
}
static void display(RemoteMessage message)async{
try {
final id = DateTime.now().millisecondsSinceEpoch ~/1000;
final NotificationDetails notificationDetails = NotificationDetails(
android: AndroidNotificationDetails(
"intraday",
"intraday channel",
channelDescription: "this is intraday channel",
importance: Importance.max,
priority: Priority.high
)
);
await _notificationsPlugin.show(id, message.notification!.title,
message.notification!.body, notificationDetails);
} on Exception catch (e) {
print(e);
}
}
}
and this is my main.dart file
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:stock_market/pages/Models/news.dart';
import 'package:stock_market/pages/blogSpotHome.dart';
import 'package:stock_market/pages/bottomNavigation.dart';
import 'package:stock_market/pages/detailedPage.dart';
import 'package:stock_market/pages/investment_from_db.dart';
import 'package:stock_market/pages/options_from_db.dart';
import 'package:stock_market/pages/stock_from_db.dart';
import 'package:stock_market/pages/utils/route.dart';
import 'package:stock_market/pages/widgets/topNavigation.dart';
import 'package:stock_market/pages/widgets/newTile.dart';
import 'package:stock_market/pages/widgets/themes.dart';
import 'package:stock_market/services/local_notification_services.dart';
import 'pages/home_page.dart';
import 'pages/login.dart';
import 'package:bottom_nav_layout/bottom_nav_layout.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter_notification_channel/flutter_notification_channel.dart';
import 'package:flutter_notification_channel/notification_importance.dart';
Future<void> _messageHandler(RemoteMessage message) async {
print('background message ${message.notification!.body}');
}
void main() async {
WidgetsFlutterBinding.ensureInitialized();
LocalNotificationService.initialize();
await Firebase.initializeApp();
await FirebaseMessaging.instance.subscribeToTopic("intraday");
await FirebaseMessaging.instance.subscribeToTopic("options");
await FirebaseMessaging.instance.subscribeToTopic("investment");
await FirebaseMessaging.instance.subscribeToTopic("blog");
// If `onMessage` is triggered with a notification, construct our own
// local notification to show to users using the created channel.
// if (notification != null && android != null) {
// flutterLocalNotificationsPlugin.show(
// notification.hashCode,
// notification.title,
// notification.body,
// NotificationDetails(
// android: AndroidNotificationDetails(
// channel.id,
// channel.name,
// channelDescription: channel.description,
// icon: android.smallIcon,
// // other properties...
// ),
// ));
// }
runApp(MyApp());
}
// class MyApp extends StatefulWidget {
// const MyApp({ Key? key }) : super(key: key);
// @override
// _MyAppState createState() => _MyAppState();
// }
// class _MyAppState extends State<MyApp> {
// FirebaseMessaging messaging = FirebaseMessaging.instance;
// // var androidSettings = AndroidInitializationSettings('app_icon');
// @override
// initState() {
// super.initState();
// ///app in background and user taps it
// FirebaseMessaging.onMessageOpenedApp.listen((message) {
// final routeFromMessage = message.data["route"];
// Navigator.of(context).pushNamed(routeFromMessage);
// });
// // ignore: unused_local_variable
// // var initializationSettingsAndroid =AndroidInitializationSettings('app_icon');
// }
// // void messagingF() async{
// // messaging.
// // }
// @override
// Widget build(BuildContext context) {
// return MaterialApp (
// themeMode: ThemeMode.light,
// theme: MyTheme.lightTheme(context),
// darkTheme: MyTheme.darkTheme(context),
// debugShowCheckedModeBanner: false,
// home: MyHome(),
// );
// }
// }
// Future<void> _createNotificationChannel(String id, String name,
// String description) async {
// final flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
// var androidNotificationChannel = AndroidNotificationChannel(
// id,
// name,
// );
// await flutterLocalNotificationsPlugin
// .resolvePlatformSpecificImplementation<
// AndroidFlutterLocalNotificationsPlugin>()
// ?.createNotificationChannel(androidNotificationChannel);
// }
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
routes: {
MyRoute.homeRoute: (context) => MyHome(),
// "/": (context) => WithTabBar(),
"1": (_) => OptionsRoute(),
"2": (_) => InvestMentRoute(),
"3": (_) => NewsPage(),
// "/news": (context) => const NewsPage(),
// "/investment": (context) => const InvestMentRoute(),
// MyRoute.dbRoute: (context) => DbRoute(),
// MyRoute.news: (context) => NewsPage()
},
themeMode: ThemeMode.light,
theme: MyTheme.lightTheme(context),
// darkTheme: MyTheme.darkTheme(context),
// debugShowCheckedModeBanner: false,
// home: Nav(),
// home:MyHome()
// home: HomePage(),]
// initialRoute: MyRoute.news,
// routes: {
// // MyRoute.loginRoute: (context) => LoginPage(),
// // MyRoute.homeRoute: (context) => HomePage(),
// // MyRoute.dbRoute: (context) => DbRoute(),
// // MyRoute.news: (context) => MainNews()
// },
);
}
}
class MyHome extends StatefulWidget {
const MyHome({ Key? key }) : super(key: key);
@override
_MyHomeState createState() => _MyHomeState();
}
class _MyHomeState extends State<MyHome> {
@override
initState() {
super.initState();
FirebaseMessaging.instance.getInitialMessage().then((message){
if (message != null) {
final routeFromMessage = message.data["route"];
Navigator.of(context).pushNamed(routeFromMessage);
print('Message also contained a notification: ${message.notification}');
}
});
///app in background and user taps it
FirebaseMessaging.onMessageOpenedApp.listen((message) {
final routeFromMessage = message.data["route"];
Navigator.of(context).pushNamed(routeFromMessage);
// Navigator.push(
// context,
// MaterialPageRoute(builder: (context) => routeFromMessage()),
// );
// Navigator.pushNamed(context, routeFromMessage);
// pushNamed(routeFromMessage);
//
});
FirebaseMessaging.onMessage.listen(( message) {
// print('Got a message whilst in the foreground!');
// print('Message data: ${message.data}');
if (message.notification != null) {
print('Message also contained a notification: ${message.notification}');
}
LocalNotificationService.display(message);
});
}
@override
Widget build(BuildContext context) {
if (mounted){
setState(() {
WithTabBar();
});
}
return WithTabBar(
// home: Nav(),
// home:WithTabBar(),
// home: HomePage()
// initialRoute:"/",
);
}
}
and this is my androidmanifest.xml file
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.stock_market">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:label="stock_market"
android:icon="@mipmap/ic_launcher">
<meta-data
android:name="com.google.firebase.messaging.default_notification_icon"
android:resource="@mipmap/ic_launcher" />
<activity
android:name=".MainActivity"
android:launchMode="singleTop"
android:theme="@style/LaunchTheme"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
android:hardwareAccelerated="true"
android:windowSoftInputMode="adjustResize">
<!-- Specifies an Android theme to apply to this Activity as soon as
the Android process has started. This theme is visible to the user
while the Flutter UI initializes. After that, this theme continues
to determine the Window background behind the Flutter UI. -->
<meta-data
android:name="io.flutter.embedding.android.NormalTheme"
android:resource="@style/NormalTheme"
/>
<!-- Displays an Android View that continues showing the launch screen
Drawable until Flutter paints its first frame, then this splash
screen fades out. A splash screen is useful to avoid any visual
gap between the end of Android's launch screen and the painting of
Flutter's first frame. -->
<meta-data
android:name="io.flutter.embedding.android.SplashScreenDrawable"
android:resource="@drawable/launch_background"
/>
<meta-data
android:name="com.google.firebase.messaging.default_notification_channel_id"
android:value="intraday"/>
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
<action android:name="FLUTTER_NOTIFICATION_CLICK"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
<!-- Don't delete the meta-data below.
This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
<meta-data
android:name="flutterEmbedding"
android:value="2" />
</application>
</manifest>
and this is the error i am getting , now i know that the icon is causing this , but i have tried everything but nothing seems to work kindly provide a solution which can help
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): Failed to handle method call
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.setSmallIcon(FlutterLocalNotificationsPlugin.java:299)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.createNotification(FlutterLocalNotificationsPlugin.java:214)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.showNotification(FlutterLocalNotificationsPlugin.java:1023)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.show(FlutterLocalNotificationsPlugin.java:1358)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.onMethodCall(FlutterLocalNotificationsPlugin.java:1240)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:233)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:85)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:818)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at android.os.MessageQueue.nativePollOnce(Native Method)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at android.os.MessageQueue.next(MessageQueue.java:336)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at android.os.Looper.loop(Looper.java:182)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at android.app.ActivityThread.main(ActivityThread.java:7563)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
E/MethodChannel#dexterous.com/flutter/local_notifications( 7850): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:994)
I/flutter ( 7850): PlatformException(error, Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference, null, java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference
I/flutter ( 7850): at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.setSmallIcon(FlutterLocalNotificationsPlugin.java:299)
I/flutter ( 7850): at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.createNotification(FlutterLocalNotificationsPlugin.java:214)
I/flutter ( 7850): at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.showNotification(FlutterLocalNotificationsPlugin.java:1023)
I/flutter ( 7850): at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.show(FlutterLocalNotificationsPlugin.java:1358)
I/flutter ( 7850): at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.onMethodCall(FlutterLocalNotificationsPlugin.java:1240)
I/flutter ( 7850): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:233)
I/flutter ( 7850): at io
I have tried copying icon to different location and tried every solution available online kindly help me
CodePudding user response：
Change this code :
final InitializationSettings initializationSettings =
InitializationSettings(
android: AndroidInitializationSettings('@mipmap/ic_launcher'));
to this :
final InitializationSettings initializationSettings =
InitializationSettings(
android: AndroidInitializationSettings('ic_launcher'));
CodePudding user response：
I found the solution, The problem was i initiziled
LocalNotificationService.initialize(context);
in
void main() async {
}
instead it had to be done in ,
class MyHome extends StatefulWidget {
const MyHome({ Key? key }) : super(key: key);
@override
class _MyHomeState extends State<MyHome> {
@override
initState() {
super.initState();
LocalNotificationService.initialize(context);
FirebaseMessaging.instance.getInitialMessage().then((message){
if (message != null) {
final routeFromMessage = message.data["route"];
Navigator.of(context).pushNamed(routeFromMessage);
print('Message also contained a notification: ${message.notification}');
}
});
hope this helps to anyone who is stuck here