Notification.java

package com.notificationFramework.notification;

import android.annotation.TargetApi;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.app.TaskStackBuilder;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Build;
import android.support.v4.app.NotificationCompat;

import com.notificationFramework.sedentary.frontEnd.NotificationClicked;
import com.notificationFramework.sedentary.frontEnd.R;
import com.notificationFramework.sedentary.frontEnd.SaveFile;

/**
 * Created by pharmacy on 09/01/2018.
 */

public abstract class Notification extends Service {

    protected NotificationManager nm;
    protected int snId = 0;
    protected SharedPreferences preferences;

    @Override
    public int onStartCommand(Intent intent, int flags, int startId){
        nm = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
        preferences = this.getSharedPreferences(getString(R.string.preference_file_key), Context.MODE_PRIVATE);
        buildNotification();
        return START_STICKY;
    }

    protected void buildNotification(){
        NotificationCompat.Builder mBuilder;
        if(Build.VERSION.SDK_INT >= 26){
            NotificationChannel nc = createNotificationChannel();
            mBuilder = new NotificationCompat.Builder(this, nc.getId());
        } else {
            mBuilder = new NotificationCompat.Builder(this, "sednc");
        }
        mBuilder = setParameters(mBuilder);

        Intent resultIntent = new Intent(this, NotificationClicked.class);
        TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
        stackBuilder.addParentStack(NotificationClicked.class);
        stackBuilder.addNextIntent(resultIntent);
        PendingIntent resultPendingIntent =
                stackBuilder.getPendingIntent(
                        0,
                        PendingIntent.FLAG_UPDATE_CURRENT
                );
        mBuilder.setContentIntent(resultPendingIntent);
        nm.notify(snId, mBuilder.build());
        SaveFile.recordNotification(1,0,0,this);
        SaveFile.recordNotificationType(this);
        stopSelf();
    }

    @TargetApi(26)
    private NotificationChannel createNotificationChannel(){
        NotificationChannel nc = new NotificationChannel("sednc", "sedentaryNotification", NotificationManager.IMPORTANCE_DEFAULT);
        nc = setChannelParameters(nc);
        return nc;
    }

    protected abstract NotificationCompat.Builder setParameters(NotificationCompat.Builder builder);

    protected abstract NotificationChannel setChannelParameters(NotificationChannel nc);
}