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Push notifications are a message that pops up on a mobile device. App publishers can send them at any time, users don’t have to be in the app or using their devices to receive them. They can do a lot of things. for example, they can show the latest sports scores, get a user to take any action, such as downloading a coupon or let a user know about an event, such as a flash sale.
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Push notifications look like SMS text messages and mobile alerts, but they only reach users who have installed your app. Each mobile platform has support for push notifications — iOS, Android, and many other OS have their own services.
To implement notification, add firebase_messaging as a dependency in your pubspec.yaml file.
To integrate your plugin into the Android part of your app, follow these steps:
Note: If this section is not completed you will get an error like this:
Note: When you are debugging on Android, use a device or AVD with Google Play services. Otherwise, you will not be able to authenticate.
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:
To integrate your plugin into the iOS part of your app, follow these steps:
After that, add the following lines to the (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions method in the AppDelegate.m/AppDelegate.swift of your iOS project.
(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
From your Dart code, you need to import the plugin and instantiate it:
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).
Messages are sent to your Flutter app via the onMessage, onLaunch, and onResume callbacks that you configured with the plugin during setup.
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:
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 click 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:
Remove the notification property in DATA to send a data message.
You will get the notification same like the native apps and also customize the notification alert design like this-
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