Otto event bus for Notifications. Really easy to show a notification from an unrelated piece of code. Nice and easy to test. Good use of the bus!

Otto event bus for Android Notification

public class ParseNotificationWatcher {

    private final ParseNotificationManager notificationManager;
    private final NotificationBuilder notificationBuilder;

    public ParseNotificationWatcher(ParseNotificationManager notificationManager, NotificationBuilder notificationBuilder) {
        this.notificationManager = notificationManager;
        this.notificationBuilder = notificationBuilder;
    }

    @Subscribe
    public void on(RecipeProcessingHasStarted event) {
        notificationManager.showNotification(notificationBuilder.build());
    }

    @Subscribe
    public void on(RecipeProcessingHasFinished event) {
        notificationManager.hideNotification();
    }

}

public class ParseNotificationManager {

    private static final int NOTIFICATION_ID = 123;
    private final NotificationManager notificationManager;

    public ParseNotificationManager(NotificationManager notificationManager) {
        this.notificationManager = notificationManager;
    }

    public void showNotification(Notification notification) {
        notificationManager.notify(NOTIFICATION_ID, notification);
    }

    public void hideNotification() {
        notificationManager.cancel(NOTIFICATION_ID);
    }
}

public class ParseNotificationBuilder implements NotificationBuilder {

    private static final int SET = 0;
    private static final int PROGRESS = 0;
    private static final boolean INDETERMINATE = true;
    private final Context context;

    public ParseNotificationBuilder(Context context) {
        this.context = context;
    }

    @Override
    public Notification build() {
        NotificationCompat.BigPictureStyle style = new NotificationCompat.BigPictureStyle();
        style.bigPicture(BitmapFactory.decodeResource(context.getResources(), R.drawable.notification_recipes_big_image));
        return new NotificationCompat.Builder(context)
                .setSmallIcon(R.drawable.ic_stat_notify_recipes)
                .setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_stat_notify_recipes))
                .setContentTitle(context.getString(R.string.notification_recipe_parse_title))
                .setContentText(context.getString(R.string.notification_recipe_parse_message))
                .setStyle(style)
                .setProgress(SET, PROGRESS, INDETERMINATE)
                .setContentIntent(createShoppingActivityIntent())
                .build();
    }

    private PendingIntent createShoppingActivityIntent() {
        return PendingIntent.getActivity(context, 0, new Intent(context, ShoppingActivity.class), 0);
    }
}