High score is not saved in Libgdx

Question

So I have two Bitmap fonts that display scores, one for current score and one for high score. Text for current score works fine, but the one for high score isn't incrementing or saving value.

Here's my code of it:

 if (manager.score > highScore){
            highScore = manager.score;
            preferences.putInteger("highScore", highScore);

            int getHighScore;
            getHighScore = preferences.getInteger("highScore", highScore);
            this.highScoreFont.draw(batch, "" + getHighScore, Gdx.graphics.getWidth() - 1070, Gdx.graphics.getHeight() - 650);
            preferences.flush();
        }

What am I doing wrong?

GameManager class

 public void checkCollisions(){
        Iterator<Bullet> it = activeBullets.iterator();
        Iterator<BlueMonster> blueMonsterIT = this.blueMonsterArray.iterator();

        Bullet bullet;
        BlueMonster bMonster;

        while (it.hasNext()){
            bullet = it.next();

            while (blueMonsterIT.hasNext()){
            bMonster = blueMonsterIT.next();
            boolean collision = Intersector.overlaps(bullet.getRect(), bMonster.getRect());

            if (collision == true){

                score++;
                gameScreen.highScore ++;

                sound = Gdx.audio.newSound(Gdx.files.internal("eksplozijaZvuk.ogg"));
                sound.play();
                Hit hit = hitPool.obtain();
                hit.init(bullet.getX(), bullet.getY());
                gameStage.addActor(hit);
                activeHitMarkers.add(hit);

                collision = false;
                activeBullets.removeValue(bullet, true);
                bullet.remove();
                bulletPool.free(bullet);

                bMonster.remove();
                blueMonsterArray.removeValue(bMonster, true);
                blueMonsterPool.free(bMonster);

                Timer.schedule(new Timer.Task() {
                    @Override
                    public void run() {
                        Iterator<Hit> it = activeHitMarkers.iterator();
                        while (it.hasNext()){
                            Hit hit = it.next();
                            hitPool.free(hit);
                            hit.remove();
                            activeHitMarkers.removeValue(hit, true);
                        }
                    }
                }, 0.1f);
            }
        }
        }
    }

PREFERENCE

Preferences preferences = Gdx.app.getPreferences("highScore");


  if (manager.score > highScore){
            highScore = manager.score;
            preferences.putInteger("highScore", highScore);
            preferences.flush();
            Gdx.app.log("Prefka", "flushano");

            int getHighScore;
            getHighScore = preferences.getInteger("highScore", highScore);
            highScoreFont.draw(batch, "" + getHighScore, Gdx.graphics.getWidth() - 1070, Gdx.graphics.getHeight() - 650);
            highScore = getHighScore;
            Gdx.app.log("mjau", "mjau");

        }

Note that preferences is initialized globaly

Answer 1

You should call

preferences.flush();

directly after

preferences.putInteger("highScore", highScore);

so the final version should looks like

preferences.putInteger("highScore", highScore);    
preferences.flush();

int getHighScore;
getHighScore = preferences.getInteger("highScore", highScore);

---

You should also remove line

gameScreen.highScore ++;

from your GameManager class - highscore should be only modified in your condition. Do not forget to initialize highscore with 0 or current preferences'es value!