Java and LibGDX Framework count phone steps?

Question

I need to count user step in my game to move player character. My player should move while someone is walking, but after I use System.out.print on numstep its still zero. How can i count my step in Java and the LibGDX Framework?

 public class PlayerBros extends Game {

        public  int step=0;
    }
    public class AndroidLauncher extends AndroidApplication implements SensorEventListener,StepListener {

    sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
            accel = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
            simpleStepDetector = new StepDetector();
            simpleStepDetector.registerListener(this);

            sensorManager.registerListener(AndroidLauncher.this, accel, SensorManager.SENSOR_DELAY_FASTEST);
            config = new AndroidApplicationConfiguration();
            playerBros=new PlayerBros();
            numSteps = playerBros.step;
            initialize(playerBros, config);
        }

        @Override
        public void onAccuracyChanged(Sensor sensor, int accuracy) {
        }

        @Override
        public void onSensorChanged(SensorEvent event) {
            if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
                simpleStepDetector.updateAccel(
                        event.timestamp, event.values[0], event.values[1], event.values[2]);
                System.out.print("AndroidLauncher: "+numSteps);
            }
        }

        @Override
        public void step(long timeNs) {
            numSteps++;

        }

    }
    public class PlayScreen implements Screen {
    private PlayerBros game;

     public void handleInput(float dt){
     player.b2body.applyLinearImpulse(new Vector2(game.step,y), player.b2body.getWorldCenter(), true);
            hud.marioLabel.setText(" "+game.step);
            System.out.print("PlayScreen: "+game.step);

     }
        public void update(float dt){
          handleInput(dt);
    }

    }