Notification not triggered on Android Wear OS

user_576671 0
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I am playing around with notifications on Wear OS and testing on a Fossil Falster 3 with Android API 28.

Why is the following notification not being triggered, in an standalone app. The code is pretty much right from the Google documentation.

    button_in.setOnClickListener {
        val notificationId = 1
        // The channel ID of the notification.
        val id = "my_channel_01"
        // Build intent for notification content
        val viewPendingIntent = Intent(this, MainActivity::class.java).let { viewIntent ->
            PendingIntent.getActivity(this, 0, viewIntent, 0)
        }
        // Notification channel ID is ignored for Android 7.1.1
        // (API level 25) and lower.
        val notificationBuilder = NotificationCompat.Builder(this, id)
            .setLocalOnly(true)
            .setSmallIcon(R.drawable.ic_launcher_foreground)
            .setContentTitle("TITLE")
            .setContentText("TEXT")
            .setContentIntent(viewPendingIntent)

        NotificationManagerCompat.from(this).apply {
            notify(notificationId, notificationBuilder.build())
        }
        Log.d(TAG, "button was pressed!")
    }

I can see the "button was pressed!" text, but I am not getting any notifications.

wear-os kotlin android-notifications android
1 Answers

Watch apps require a notification channel, unlike Android apps which do not work like this.

In your code, val notificationId = 1 refers to the notification channel ID.

You can construct a NotificationChannel and register it like this:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    // Create the NotificationChannel
    val name = getString(R.string.channel_name)
    val descriptionText = getString(R.string.channel_description)
    val importance = NotificationManager.IMPORTANCE_DEFAULT
    val mChannel = NotificationChannel(1, name, importance) // 1 is the channel ID
    mChannel.description = descriptionText
    // Register the channel with the system; you can't change the importance
    // or other notification behaviors after this
    val notificationManager = getSystemService(NOTIFICATION_SERVICE) as NotificationManager
    notificationManager.createNotificationChannel(mChannel)
}

Notice in the commented code, in val mChannel = ..., you can see that the first parameter value 1 refers to the channel ID, as specified in your code in the OP.

You can read more about notification channels here: https://developer.android.com/training/notify-user/channels

user_26278590
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