SetTimeOutAfter 不适用于 android 通知

Question

The setTimeOutAfter method for notification seems not t be working. My application meets the requirement for minSdk but I do not know why the heads-up-notification dismises from the screen before time elapses.

@Singleton
class NotificationHelper @Inject constructor(
    @ApplicationContext private var context: Context,
) {

    companion object {
        private const val NOTIFICATION_CHANNEL_ID = "NOTIFICATION_CHANNEL"
        private const val NOTIFICATION_CHANNEL_NAME = "NOTIFICATION_CHANNEL_NAME"
        private const val BROADCAST_REQUEST_CODE = 0
        private const val NOTIFICATION_TIME_OUT = 30000L
    }

    fun getNotificationManager() =
        context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager

    fun createNotification(
        title: String,
        subtitle: String = "",
    ): Notification {
        createNotificationChannel()
        return createNotificationBase(title, subtitle)
            .build()
    }

    fun <T> createNotification(
        title: String,
        actionTitle: String,
        buttonAction: String,
        broadcastReceiver: Class<T>,
        subtitle: String = ""
    ): Notification {
        createNotificationChannel()

        val intent = Intent(context, broadcastReceiver)
            .apply {
                action = buttonAction
            }

        val pendingIntent = pendingIntentWithBroadcast(intent)

        return createNotificationBase(title, subtitle)
            .setContentIntent(pendingIntent)
            .addAction(R.drawable.ic_amazon_blue_logo, actionTitle, pendingIntent)
            .build()
    }

    fun sendNotification(notification: Notification, notificationId: Int) {
        getNotificationManager().notify(notificationId, notification)
    }


    private fun pendingIntentWithBroadcast(intent: Intent): PendingIntent =
        PendingIntent.getBroadcast(
            context,
            BROADCAST_REQUEST_CODE,
            intent,
            PendingIntent.FLAG_UPDATE_CURRENT
        )

    private fun createNotificationChannel() {
        val channel = NotificationChannel(
            NOTIFICATION_CHANNEL_ID,
            NOTIFICATION_CHANNEL_NAME,
            NotificationManager.IMPORTANCE_HIGH
        )
            .apply {
                lockscreenVisibility = Notification.VISIBILITY_PRIVATE
            }

        getNotificationManager().createNotificationChannel(channel)
    }

    private fun createNotificationBase(
        title: String,
        subtitle: String,
    ): NotificationCompat.Builder {
        return NotificationCompat.Builder(context, NOTIFICATION_CHANNEL_ID)
            .setSmallIcon(R.drawable.ic_alexa_notification)
            .setContentTitle(title)
            .setContentText(subtitle)
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
            .setCategory(NotificationCompat.CATEGORY_MESSAGE)
            .setTimeoutAfter(NOTIFICATION_TIME_OUT)
            .setOnlyAlertOnce(true)
        
    }


    fun cancelNotification(notificationId:Int) = getNotificationManager().cancel(notificationId)
}

How can I make this work?

Answer 1

do you want to keep heads-up-always-visible Notification present on screen for TimeOutAfter duration? thats not possible, duration of head-up layout visible on screen is configured in system and you won't override this

setTimeOutAfter value will make Notification auto-dismiss after this period, but only in API26+ (when introduced). There is no guarantee that AppCompat / AndroidX version will handle this method in older system versions, common approach is that compat library just won't call setTimeOutAfter under the hood on APIs below 26 protecting your app from NoSuchMethodException crash. still this isn't same as bringing this feature to older OS versions. but you can do by yourself with eg

new Handler(Looper.getMainLooper()).postDelayed (() -> {
    getNotificationManager().cancel(notificationId);
}, NOTIFICATION_TIME_OUT);

placed just after getNotificationManager().notify(... call

Answer 2

I was able to achieve the desired result with adding setOngoing(true) to the notification builder.