How to Create Notifiaction in Android another way it means using Application class

private void createNotication(String channe_id, String discription) {

    NotificationCompat.Builder builder = new NotificationCompat.Builder(this,
            channe_id);
    builder.setPriority(NotificationManager.IMPORTANCE_HIGH);
    builder.setContentTitle("Location running");
    builder.setContentText(discription);
    builder.setSmallIcon(R.mipmap.ic_launcher_round);
    builder.setAutoCancel(true);

    NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    notificationManager.notify(9, builder.build());

} 

Application calss

public class App extends Application {
    public static final String channe_id="Location";
    public static final String channel_id2="Backgroundlocation";

    @Override
    public void onCreate() {
        super.onCreate();
      SetChannelId(channe_id,"Location");
      SetChannelId(channel_id2,"Background Location");

    }

    private void SetChannelId(String channleId,String channelName)
    {
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
            NotificationChannel channel = new
                    NotificationChannel(channleId, channelName, NotificationManager.IMPORTANCE_HIGH);
            channel.setLockscreenVisibility(1);
            channel.setLightColor(getColor(R.color.purple_700));

            NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
            manager.createNotificationChannel(channel);
        }
    }
}