Android Notifications

Simple Notification:

private final String Channel_ID = "com.nirjhor3029.notification.nirjhor";
private final int Notification_id = 0031;

NotificationCompat.Builder builder ;



@Overrideprotected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    builder = new NotificationCompat.Builder(this,Channel_ID);
    builder.setAutoCancel(true);



}

public void simpleNotification(View view) {

    createNotificationChannel();

    builder.setSmallIcon(R.mipmap.ic_launcher);
    builder.setTicker("This is Ticker !");
    builder.setContentTitle("Notification Title");
    builder.setContentText("This is notification body or text!");
    builder.setSubText("this is subText");
    builder.setPriority(NotificationCompat.PRIORITY_DEFAULT);
    builder.setWhen(System.currentTimeMillis());

    Intent intent = new Intent(this,MainActivity.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(this,0,intent,PendingIntent.FLAG_UPDATE_CURRENT);

    builder.setContentIntent(pendingIntent);


    NotificationManagerCompat notificationManagerCompat = NotificationManagerCompat.from(this);
    notificationManagerCompat.notify(Notification_id,builder.build());

}

private void createNotificationChannel()
{
    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
    {
        CharSequence name = "Personal Notification1";
        String description = "Include all the personal notification1";
        int importance = NotificationManager.IMPORTANCE_DEFAULT;

        NotificationChannel notificationChannel = new NotificationChannel(Channel_ID,name,importance);
        notificationChannel.setDescription(description);

        NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        manager.createNotificationChannel(notificationChannel);


    }
}