I have tried many solutions but none of them are worked. I am able receive FCM notification when app is active, but not getting notification when app is background or killed.
you need to create a service class extending FirebaseMessagingService and override onMessageReceived method in that class to send notification
class MyFirebaseMessagingService : FirebaseMessagingService() {
override fun onMessageReceived(message: RemoteMessage) {
super.onMessageReceived(message)
try {
message.notification?.let {
showNotification(
it.title ?: "",
it.body ?: ""
)
}
} catch (e: Exception) {
e.printStackTrace()
}
}
}
you are now getting the notification info from backend and showing it as a notification by using the function showNotification
. of course, you must implement the function showNotification
. it just a simple function for showing notifications in android
Edit : this the implementation of the function, add this to your class
class MyFirebaseMessagingService : FirebaseMessagingService() {
companion object {
const val channelId = "Channel"
const val channelName = "MyChannel"
const val smallIcon: Int = R.drawable.ic_logo
const val notificationId = 1
}
fun showNotification(myTitle: String, myBody: String) {
val notificationBuilder = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
Notification.Builder(applicationContext, channelId)
} else {
Notification.Builder(applicationContext)
}
val intent = Intent(applicationContext, HomeActivity::class.java)
val pendingIntent = PendingIntent.getActivity(
applicationContext,
0,
intent,
PendingIntent.FLAG_UPDATE_CURRENT
)
val notificationManager =
applicationContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
when {
Build.VERSION.SDK_INT >= 26 -> {
val channel = NotificationChannel(
channelId,
channelName,
NotificationManager.IMPORTANCE_DEFAULT
)
notificationManager.createNotificationChannel(channel)
notificationBuilder
.setContentIntent(pendingIntent)
.setContentText(myBody)
.setSmallIcon(smallIcon)
.setContentTitle(myTitle)
}
Build.VERSION.SDK_INT >= 24 -> notificationBuilder
.setContentText(myBody)
.setContentTitle(myTitle)
.setSmallIcon(smallIcon)
.setContentIntent(pendingIntent)
else -> notificationBuilder
.setContentText(myBody)
.setContentTitle(myTitle)
.setSmallIcon(smallIcon)
.setContentIntent(pendingIntent)
}
notificationManager.notify(notificationId, notificationBuilder.build())
}
}
If you want to get notification when app is background or killed your json object has to be this like:
{ "data":{ "title" : "your_title", "body" : "your_body" }, "to": "device_token", "priority": "high" }
You can catch notification onMessageReceived
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