firebase_messaging 4.0.0+3
firebase_messaging: ^4.0.0+3 copied to clipboard
Flutter plugin for Firebase Cloud Messaging, a cross-platform messaging solution that lets you reliably deliver messages on Android and iOS.
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.
For Flutter plugins for other Firebase products, see FlutterFire.md.
Note: This plugin is still under development, and some APIs might not be available yet. Feedback and Pull Requests are most welcome!
Usage #
To use this plugin, add firebase_messaging
as a dependency in your pubspec.yaml file.
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 insideandroid/app
. Next, modify theandroid/build.gradle
file and theandroid/app/build.gradle
file to add the Google services plugin as described by the Firebase assistant. -
(optional, but recommended) If want to be notified in your app (via
onResume
andonLaunch
, see below) when the user clicks on a notification in the system tray include the followingintent-filter
within the<activity>
tag of yourandroid/app/src/main/AndroidManifest.xml
:
<intent-filter>
<action android:name="FLUTTER_NOTIFICATION_CLICK" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
iOS Integration #
To integrate your plugin into the iOS part of your app, follow these steps:
-
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".
-
Using the Firebase Console add an iOS app to your project: Follow the assistant, download the generated
GoogleService-Info.plist
file, openios/Runner.xcworkspace
with Xcode, and within Xcode place the file insideios/Runner
. Don't follow the steps named "Add Firebase SDK" and "Add initialization code" in the Firebase assistant. -
In Xcode, select
Runner
in the Project Navigator. In the Capabilities Tab turn onPush Notifications
andBackground Modes
, and enableBackground fetch
andRemote notifications
underBackground Modes
. -
Remove the
use_frameworks!
line fromios/Podfile
(workaround for flutter/flutter#9694). -
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 Foreground | App in Background | App Terminated | |
---|---|---|---|
Notification on Android | onMessage |
Notification 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 iOS | onMessage |
Notification 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 Android | onMessage |
onMessage while app stays in the background. |
not supported by plugin, message is lost |
Data Message on iOS | onMessage |
Message 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.
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.