Flutter Dev

Flutter Dev


Flutter Push Notification with Firebase Cloud Messaging

In this tutorial, we will learn how to implement Firebase Push Notification with Flutter apps

What you’ll learn?

  • Configure android project such as gradle and manifest file
  • Creating Firebase Project & do configuration
  • Writing code for push notification
  • Receive push notification
  • Send Push Notification via firebase console & curl

Firebase Cloud Messaging for Flutter

A Flutter plugin to use the Firebase Cloud Messaging (FCM) API.

With this plugin, your Flutter app can receive and process push notifications as well as data messages on Android and iOS. Read Firebase’s About FCM Messages to learn more about the differences between notification messages and data messages.

1. Depend on it
Add this to your package’s pubspec.yaml file:

  firebase_messaging: ^5.1.8

2. Install it
You can install packages from the command line:

with Flutter:

flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it
Now in your Dart code, you can use:

import 'package:firebase_messaging/firebase_messaging.dart';

Getting Started

Check out the example directory for a sample app using Firebase Cloud Messaging.

Android Integration #

To integrate your plugin into the Android part of your app, follow these steps:

Using the Firebase Console add an Android app to your project: Follow the assistant, download the generated google-services.json file and place it inside android/app.

Add the classpath to the [project]/android/build.gradle file.

dependencies {
  // Example existing classpath
  classpath 'com.android.tools.build:gradle:3.2.1'
  // Add the google services classpath
  classpath 'com.google.gms:google-services:4.3.0'

Add the apply plugin to the [project]/android/app/build.gradle file.

apply plugin: 'com.google.gms.google-services'

Note: If this section is not completed you will get an error like this:

Default FirebaseApp is not initialized in this process [package name].
Make sure to call FirebaseApp.initializeApp(Context) first.

Note: When you are debugging on Android, use a device or AVD with Google Play services. Otherwise you will not be able to authenticate.

  1. (optional, but recommended) If want to be notified in your app (via onResume and onLaunch, see below) when the user clicks on a notification in the system tray include the following intent-filter within the <activity> tag of your android/app/src/main/AndroidManifest.xml:
      action android:name="FLUTTER_NOTIFICATION_CLICK" />
      category android:name="android.intent.category.DEFAULT" />

Optionally handle background messages #

Background message handling is intended to be performed quickly. Do not perform long running tasks as they may not be allowed to finish by the Android system. See Background Execution Limits for more.

By default background messaging is not enabled. To handle messages in the background:

1. Add an Application.java class to your app

 package io.flutter.plugins.firebasemessagingexample;

 import io.flutter.app.FlutterApplication;
 import io.flutter.plugin.common.PluginRegistry;
 import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;
 import io.flutter.plugins.GeneratedPluginRegistrant;
 import io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService;

 public class Application extends FlutterApplication implements PluginRegistrantCallback {
   public void onCreate() {

   public void registerWith(PluginRegistry registry) {

2. Set name property of application in AndroidManifest.xml

 <application android:name=".Application" ...>

3. Define a top level Dart method to handle background messages

Future<dynamic> myBackgroundMessageHandler(Map<String, dynamic> message) {
  if (message.containsKey('data')) {
    // Handle data message
    final dynamic data = message['data'];

  if (message.containsKey('notification')) {
    // Handle notification message
    final dynamic notification = message['notification'];

  // Or do other work.

Note: the protocol of data and notification are in line with the fields defined by a RemoteMessage.

  1. Set onBackgroundMessage handler when calling configure
      onMessage: (Map<String, dynamic> message) async {
        print("onMessage: $message");
      onBackgroundMessage: myBackgroundMessageHandler,
      onLaunch: (Map<String, dynamic> message) async {
        print("onLaunch: $message");
      onResume: (Map<String, dynamic> message) async {
        print("onResume: $message");

Note: configure should be called early in the lifecycle of your application so that it can be ready to receive messages as early as possible. See the example app for a demonstration.

iOS Integration #

To integrate your plugin into the iOS part of your app, follow these steps:

1.Generate the certificates required by Apple for receiving push notifications following this guide in the Firebase docs. You can skip the section titled “Create the Provisioning Profile”.

  1. Using the Firebase Console add an iOS app to your project: Follow the assistant, download the generated GoogleService-Info.plist file, open ios/Runner.xcworkspace with Xcode, and within Xcode place the file inside ios/Runner. Don’t follow the steps named “Add Firebase SDK” and “Add initialization code” in the Firebase assistant.
  2. In Xcode, select Runner in the Project Navigator. In the Capabilities Tab turn on Push Notifications and Background Modes, and enable Background fetch and Remote notifications under Background Modes.
  3. Follow the steps in the “Upload your APNs certificate” section of the Firebase docs.

Dart/Flutter Integration #

From your Dart code, you need to import the plugin and instantiate it:

import 'package:firebase_messaging/firebase_messaging.dart';

final FirebaseMessaging _firebaseMessaging = FirebaseMessaging();

Next, you should probably request permissions for receiving Push Notifications. For this, call _firebaseMessaging.requestNotificationPermissions(). This will bring up a permissions dialog for the user to confirm on iOS. It’s a no-op on Android. Last, but not least, register onMessage, onResume, and onLaunch callbacks via _firebaseMessaging.configure() to listen for incoming messages (see table below for more information).

Receiving Messages #

Messages are sent to your Flutter app via the onMessage, onLaunch, and onResume callbacks that you configured with the plugin during setup. Here is how different message types are delivered on the supported platforms:
App in ForegroundApp in BackgroundApp TerminatedNotification on AndroidonMessageNotification is delivered to system tray. When the user clicks on it to open app onResume fires if click_action: FLUTTER_NOTIFICATION_CLICK is set (see below).Notification is delivered to system tray. When the user clicks on it to open app onLaunch fires if click_action: FLUTTER_NOTIFICATION_CLICK is set (see below).Notification on iOSonMessageNotification is delivered to system tray. When the user clicks on it to open app onResume fires.Notification is delivered to system tray. When the user clicks on it to open app onLaunch fires.Data Message on AndroidonMessage``````onMessage while app stays in the background.not supported by plugin, message is lostData Message on iOSonMessageMessage is stored by FCM and delivered to app via onMessage when the app is brought back to foreground.Message is stored by FCM and delivered to app via onMessage when the app is brought back to foreground.

Additional reading: Firebase’s About FCM Messages.

Notification messages with additional data #

It is possible to include additional data in notification messages by adding them to the "data"-field of the message.

On Android, the message contains an additional field data containing the data. On iOS, the data is directly appended to the message and the additional data-field is omitted.

To receive the data on both platforms:

Futurevoid> _handleNotification (Mapdynamic, dynamic> message, bool dialog) async {
    var data = message['data'] ?? message;
    String expectedAttribute = data['expectedAttribute'];
    /// [...]

Sending Messages #

Refer to the Firebase documentation about FCM for all the details about sending messages to your app. When sending a notification message to an Android device, you need to make sure to set the click_action property of the message to FLUTTER_NOTIFICATION_CLICK. Otherwise the plugin will be unable to deliver the notification to your app when the users clicks on it in the system tray.

For testing purposes, the simplest way to send a notification is via the Firebase Console. Make sure to include click_action: FLUTTER_NOTIFICATION_CLICK as a “Custom data” key-value-pair (under “Advanced options”) when targeting an Android device. The Firebase Console does not support sending data messages.

Alternatively, a notification or data message can be sent from a terminal:

DATA='{"notification": {"body": "this is a body","title": "this is a title"}, "priority": "high", "data": {"click_action": "FLUTTER_NOTIFICATION_CLICK", "id": "1", "status": "done"}, "to": "<FCM TOKEN>"}'
curl https://fcm.googleapis.com/fcm/send -H "Content-Type:application/json" -X POST -d "$DATA" -H "Authorization: key=<FCM SERVER KEY>"

Remove the notification property in DATA to send a data message.

#flutter #firebase

What is GEEK

Buddha Community

Flutter Push Notification with Firebase Cloud Messaging

Google's Flutter 1.20 stable announced with new features - Navoki

Flutter Google cross-platform UI framework has released a new version 1.20 stable.

Flutter is Google’s UI framework to make apps for Android, iOS, Web, Windows, Mac, Linux, and Fuchsia OS. Since the last 2 years, the flutter Framework has already achieved popularity among mobile developers to develop Android and iOS apps. In the last few releases, Flutter also added the support of making web applications and desktop applications.

Last month they introduced the support of the Linux desktop app that can be distributed through Canonical Snap Store(Snapcraft), this enables the developers to publish there Linux desktop app for their users and publish on Snap Store.  If you want to learn how to Publish Flutter Desktop app in Snap Store that here is the tutorial.

Flutter 1.20 Framework is built on Google’s made Dart programming language that is a cross-platform language providing native performance, new UI widgets, and other more features for the developer usage.

Here are the few key points of this release:

Performance improvements for Flutter and Dart

In this release, they have got multiple performance improvements in the Dart language itself. A new improvement is to reduce the app size in the release versions of the app. Another performance improvement is to reduce junk in the display of app animation by using the warm-up phase.


If your app is junk information during the first run then the Skia Shading Language shader provides for pre-compilation as part of your app’s build. This can speed it up by more than 2x.

Added a better support of mouse cursors for web and desktop flutter app,. Now many widgets will show cursor on top of them or you can specify the type of supported cursor you want.

Autofill for mobile text fields

Autofill was already supported in native applications now its been added to the Flutter SDK. Now prefilled information stored by your OS can be used for autofill in the application. This feature will be available soon on the flutter web.


A new widget for interaction

InteractiveViewer is a new widget design for common interactions in your app like pan, zoom drag and drop for resizing the widget. Informations on this you can check more on this API documentation where you can try this widget on the DartPad. In this release, drag-drop has more features added like you can know precisely where the drop happened and get the position.

Updated Material Slider, RangeSlider, TimePicker, and DatePicker

In this new release, there are many pre-existing widgets that were updated to match the latest material guidelines, these updates include better interaction with Slider and RangeSliderDatePicker with support for date range and time picker with the new style.


New pubspec.yaml format

Other than these widget updates there is some update within the project also like in pubspec.yaml file format. If you are a flutter plugin publisher then your old pubspec.yaml  is no longer supported to publish a plugin as the older format does not specify for which platform plugin you are making. All existing plugin will continue to work with flutter apps but you should make a plugin update as soon as possible.

Preview of embedded Dart DevTools in Visual Studio Code

Visual Studio code flutter extension got an update in this release. You get a preview of new features where you can analyze that Dev tools in your coding workspace. Enable this feature in your vs code by _dart.previewEmbeddedDevTools_setting. Dart DevTools menu you can choose your favorite page embed on your code workspace.

Network tracking

The updated the Dev tools comes with the network page that enables network profiling. You can track the timings and other information like status and content type of your** network calls** within your app. You can also monitor gRPC traffic.

Generate type-safe platform channels for platform interop

Pigeon is a command-line tool that will generate types of safe platform channels without adding additional dependencies. With this instead of manually matching method strings on platform channel and serializing arguments, you can invoke native class and pass nonprimitive data objects by directly calling the Dartmethod.

There is still a long list of updates in the new version of Flutter 1.2 that we cannot cover in this blog. You can get more details you can visit the official site to know more. Also, you can subscribe to the Navoki newsletter to get updates on these features and upcoming new updates and lessons. In upcoming new versions, we might see more new features and improvements.

You can get more free Flutter tutorials you can follow these courses:

#dart #developers #flutter #app developed #dart devtools in visual studio code #firebase local emulator suite in flutter #flutter autofill #flutter date picker #flutter desktop linux app build and publish on snapcraft store #flutter pigeon #flutter range slider #flutter slider #flutter time picker #flutter tutorial #flutter widget #google flutter #linux #navoki #pubspec format #setup flutter desktop on windows

Adaline  Kulas

Adaline Kulas


Multi-cloud Spending: 8 Tips To Lower Cost

A multi-cloud approach is nothing but leveraging two or more cloud platforms for meeting the various business requirements of an enterprise. The multi-cloud IT environment incorporates different clouds from multiple vendors and negates the dependence on a single public cloud service provider. Thus enterprises can choose specific services from multiple public clouds and reap the benefits of each.

Given its affordability and agility, most enterprises opt for a multi-cloud approach in cloud computing now. A 2018 survey on the public cloud services market points out that 81% of the respondents use services from two or more providers. Subsequently, the cloud computing services market has reported incredible growth in recent times. The worldwide public cloud services market is all set to reach $500 billion in the next four years, according to IDC.

By choosing multi-cloud solutions strategically, enterprises can optimize the benefits of cloud computing and aim for some key competitive advantages. They can avoid the lengthy and cumbersome processes involved in buying, installing and testing high-priced systems. The IaaS and PaaS solutions have become a windfall for the enterprise’s budget as it does not incur huge up-front capital expenditure.

However, cost optimization is still a challenge while facilitating a multi-cloud environment and a large number of enterprises end up overpaying with or without realizing it. The below-mentioned tips would help you ensure the money is spent wisely on cloud computing services.

  • Deactivate underused or unattached resources

Most organizations tend to get wrong with simple things which turn out to be the root cause for needless spending and resource wastage. The first step to cost optimization in your cloud strategy is to identify underutilized resources that you have been paying for.

Enterprises often continue to pay for resources that have been purchased earlier but are no longer useful. Identifying such unused and unattached resources and deactivating it on a regular basis brings you one step closer to cost optimization. If needed, you can deploy automated cloud management tools that are largely helpful in providing the analytics needed to optimize the cloud spending and cut costs on an ongoing basis.

  • Figure out idle instances

Another key cost optimization strategy is to identify the idle computing instances and consolidate them into fewer instances. An idle computing instance may require a CPU utilization level of 1-5%, but you may be billed by the service provider for 100% for the same instance.

Every enterprise will have such non-production instances that constitute unnecessary storage space and lead to overpaying. Re-evaluating your resource allocations regularly and removing unnecessary storage may help you save money significantly. Resource allocation is not only a matter of CPU and memory but also it is linked to the storage, network, and various other factors.

  • Deploy monitoring mechanisms

The key to efficient cost reduction in cloud computing technology lies in proactive monitoring. A comprehensive view of the cloud usage helps enterprises to monitor and minimize unnecessary spending. You can make use of various mechanisms for monitoring computing demand.

For instance, you can use a heatmap to understand the highs and lows in computing visually. This heat map indicates the start and stop times which in turn lead to reduced costs. You can also deploy automated tools that help organizations to schedule instances to start and stop. By following a heatmap, you can understand whether it is safe to shut down servers on holidays or weekends.

#cloud computing services #all #hybrid cloud #cloud #multi-cloud strategy #cloud spend #multi-cloud spending #multi cloud adoption #why multi cloud #multi cloud trends #multi cloud companies #multi cloud research #multi cloud market

Terry  Tremblay

Terry Tremblay


What is Flutter and why you should learn it?

Flutter is an open-source UI toolkit for mobile developers, so they can use it to build native-looking** Android and iOS** applications from the same code base for both platforms. Flutter is also working to make Flutter apps for Web, PWA (progressive Web-App) and Desktop platform (Windows,macOS,Linux).


Flutter was officially released in December 2018. Since then, it has gone a much stronger flutter community.

There has been much increase in flutter developers, flutter packages, youtube tutorials, blogs, flutter examples apps, official and private events, and more. Flutter is now on top software repos based and trending on GitHub.

Flutter meaning?

What is Flutter? this question comes to many new developer’s mind.


Flutter means flying wings quickly, and lightly but obviously, this doesn’t apply in our SDK.

So Flutter was one of the companies that were acquired by **Google **for around $40 million. That company was based on providing gesture detection and recognition from a standard webcam. But later when the Flutter was going to release in alpha version for developer it’s name was Sky, but since Google already owned Flutter name, so they rename it to Flutter.

Where Flutter is used?

Flutter is used in many startup companies nowadays, and even some MNCs are also adopting Flutter as a mobile development framework. Many top famous companies are using their apps in Flutter. Some of them here are





Reflectly app

Reflectly app

Abbey Road Studios

Abbey Road Studios

and many more other apps. Mobile development companies also adopted Flutter as a service for their clients. Even I was one of them who developed flutter apps as a freelancer and later as an IT company for mobile apps.

Flutter as a service

#dart #flutter #uncategorized #flutter framework #flutter jobs #flutter language #flutter meaning #flutter meaning in hindi #google flutter #how does flutter work #what is flutter

Adaline  Kulas

Adaline Kulas


What are the benefits of cloud migration? Reasons you should migrate

The moving of applications, databases and other business elements from the local server to the cloud server called cloud migration. This article will deal with migration techniques, requirement and the benefits of cloud migration.

In simple terms, moving from local to the public cloud server is called cloud migration. Gartner says 17.5% revenue growth as promised in cloud migration and also has a forecast for 2022 as shown in the following image.

#cloud computing services #cloud migration #all #cloud #cloud migration strategy #enterprise cloud migration strategy #business benefits of cloud migration #key benefits of cloud migration #benefits of cloud migration #types of cloud migration

Ron  Cartwright

Ron Cartwright


How to Integrate Flutter Push Notifications with Firebase Cloud Messaging

Learn how to integrate Flutter push notifications into your mobile app with Firebase Cloud Messaging in this step-by-step guide.

User engagement is crucial to the success of any mobile application. Push notifications help attract user attention and, when implemented properly in tandem with high-quality content, can contribute to major marketing success.

In this tutorial, we’ll demonstrate how to integrate and deliver push notifications to a Flutter application using an awesome service provided by Firebase called Firebase Cloud Messaging (FCM). It’s free and easy to get started with, and you don’t need to manage your backend infrastructure.

We’ll cover the following with detailed examples and step-by-step instructions:

  • What are push notifications?
  • Firebase setup
  • Integrating Firebase with your Flutter app
  • Android integration
  • iOS integration
  • Flutter plugins
  • Building a Flutter UI
  • Adding push functionality with Firebase Cloud Messaging
  • Reacting to a push notification
  • Handling background notifications
  • Flutter push notifications on Android and iOS

#flutter #firebase #cloud #developer