Android Notification.PRIORITY_MAX is deprecated what is the alternative to show notification on top?

PRIORITY_MAX This constant was deprecated in API level 26. use IMPORTANCE_HIGH instead.

PRIORITY_MAX

int PRIORITY_MAX

This constant was deprecated in API level 26. use IMPORTANCE_HIGH instead.

Highest priority, for your application's most important items that require the user's prompt attention or input.

Constant Value: 2 (0x00000002)

// create ios channel
        NotificationChannel iosChannel = new NotificationChannel(IOS_CHANNEL_ID,
                IOS_CHANNEL_NAME, NotificationManager.IMPORTANCE_HIGH);
        iosChannel.enableLights(true);
        iosChannel.enableVibration(true);
        iosChannel.setLightColor(Color.GRAY);
        iosChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
        getManager().createNotificationChannel(iosChannel);

https://developer.android.com/reference/android/app/Notification.html#PRIORITY_MIN

In android O there was introduction of Notification channels. In particular you define Channel with constructor. In documentation you can see notion of importance and that is what replaces priority.

Starting from Android O (API 26) priority at notification level has been deprecated. It was replaced by importance at the channel level and the notifications must now be put in a specific channel.

If you are running on Android O or greater you have to create a channel and define the channel importance.

NotificationChannel channel = new NotificationChannel(CHANNEL_ID,
            CHANNEL_NAME, NotificationManager.IMPORTANCE_HIGH);

If you need to maintain the back compatibility with older Android version then you have to continue to define the priority at the notification level.

NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
            ...
            .setPriority(Notification.PRIORITY_MAX)
            ...

Unfortunately it generates the warning about PRIORITY_MAX deprecation.

It can be avoid using NotificationCompat version of the PRIORITY_MAX constant.

NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
        ...
        .setPriority(NotificationCompat.PRIORITY_MAX)
        ...