So, I have an application which uses push notifications of different purposes. When you click on these notifications it will always show the only Activity - SearchActivity, because it is in a code of onMessageRecieved fun in a class FirebaseMessagingService:

private const val CHANNEL_ID = "my_channel"

 class FirebaseService: FirebaseMessagingService() {

    companion object {
        var sharedPref: SharedPreferences? = null

        var token: String?
            get() {
                return sharedPref?.getString("token", "")
            }
            set(value) {
                sharedPref?.edit()?.putString("token", value)?.apply()
            }
    }

    override fun onNewToken(newToken: String) {
        super.onNewToken(newToken)
        token = newToken
    }

    override fun onMessageReceived(message: RemoteMessage) {
        super.onMessageReceived(message)

        val intent = Intent(this, **SearchActivity::class.java**)
        val notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        val notificationID = Random.nextInt()

        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            createNotificationChannel(notificationManager)
        }

        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
        val pendingIntent = PendingIntent.getActivity(this, 0, intent, FLAG_ONE_SHOT)
        val notification = NotificationCompat.Builder(this, CHANNEL_ID)
            .setContentTitle(message.data["title"])
            .setContentText(message.data["message"])
            .setSmallIcon(R.drawable.gaz)
            .setAutoCancel(true)
            .setContentIntent(pendingIntent)
            .build()

        notificationManager.notify(notificationID, notification)
    }

    @RequiresApi(Build.VERSION_CODES.O)
    private fun createNotificationChannel(notificationManager: NotificationManager) {
        val channelName = "channelName"
        val channel = NotificationChannel(CHANNEL_ID, channelName, IMPORTANCE_HIGH).apply {
            description = "My channel description"
            enableLights(true)
            lightColor = Color.GREEN
        }
        notificationManager.createNotificationChannel(channel)
    }
}

The question is - How to use different Actvities as first Activity while app opening depending on what notification was clicked?? In other words - when push notification with "text X" is clicked we go to Activity1, when push notification with "text Z" is clicked we go to Activity3, etc...

CodePudding user response：

You could do this way:

override fun onMessageReceived(message: RemoteMessage) {
    super.onMessageReceived(message)
    val msg = message.data["message"]
    var intent = null
    when(msg){
    "text X": intent = Intent(this, SearchActivity1::class.java)
    "text Y": intent = Intent(this, SearchActivity2::class.java)
    "text Z": intent = Intent(this, SearchActivity3::class.java)

    val notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
    val notificationID = Random.nextInt()

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        createNotificationChannel(notificationManager)
    }

    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
    val pendingIntent = PendingIntent.getActivity(this, 0, intent, FLAG_ONE_SHOT)
    val notification = NotificationCompat.Builder(this, CHANNEL_ID)
        .setContentTitle(message.data["title"])
        .setContentText(message.data["message"])
        .setSmallIcon(R.drawable.gaz)
        .setAutoCancel(true)
        .setContentIntent(pendingIntent)
        .build()

    notificationManager.notify(notificationID, notification)
}

@RequiresApi(Build.VERSION_CODES.O)
private fun createNotificationChannel(notificationManager: NotificationManager) {
    val channelName = "channelName"
    val channel = NotificationChannel(CHANNEL_ID, channelName, IMPORTANCE_HIGH).apply {
        description = "My channel description"
        enableLights(true)
        lightColor = Color.GREEN
    }
    notificationManager.createNotificationChannel(channel)
  }
}