NotificationChannelCreator.java

package com.JTGD.nofitcation_channel_controller;

import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Context;
import android.os.Build;
import android.util.Log;

public class NotificationChannelCreator {
    //Creates an instance of the class
    private static final NotificationChannelCreator ourInstance = new NotificationChannelCreator();

    //Returns the instance of the class
    public static NotificationChannelCreator getInstance() {
        return ourInstance;
    }

    //Constructor, no code necessary here
    private NotificationChannelCreator() {
    }

    //Defines our channel IDs. This is what we will enter in our Firebase console
    //to send a message to a specific notification channel.
    public static final String CHANNEL_1_ID = "breaking_news";
    public static final String CHANNEL_2_ID = "daily_deals";

    //We will call this function from Unity when we open our application.
    //This will create the notification channels so we can send messages to them.
    private void createNotificationChannels(Context curContext){

        //Notification channels only work in Android Oreo or greater,
        //this checks to ensure the device is running Android Oreo or greater
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){

            //Creates a log message. We use the 'Unity' tag so we can see it
            //along side other Unity Debug messages in our device logs.
            Log.i("Unity", "Creating Notification Channels");

            //Setting up the first notification channel.
            NotificationChannel channel1 = new NotificationChannel(
                    CHANNEL_1_ID,
                    "Breaking News",
                    NotificationManager.IMPORTANCE_HIGH
            );
            channel1.setDescription("Get the latest news from this app!");

            //Setting up the second notification channel.
            NotificationChannel channel2 = new NotificationChannel(
                    CHANNEL_2_ID,
                    "Deals of the Day",
                    NotificationManager.IMPORTANCE_HIGH
            );
            channel2.setDescription("See the latest deals as soon as they are announced!");

            //Get the notification manager of the application's context (from Unity)
            NotificationManager nManager = curContext.getSystemService(NotificationManager.class);

            //Create the two notification channels
            nManager.createNotificationChannel(channel1);
            nManager.createNotificationChannel(channel2);
        }
    }
}