private ViewPager viewPager;
HorizontalScrollMenuView horizontal_menu;

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

    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    horizontal_menu = (HorizontalScrollMenuView) findViewById(R.id.horizontal_menu);
    viewPager = (ViewPager) findViewById(R.id.pager);

    horizontal_menu.addItem("Menu 1", R.drawable.home_icon,true);
    horizontal_menu.addItem("Menu 2", R.drawable.chuletas_icon);
    horizontal_menu.addItem("Menu 3", R.drawable.rcf_icon);
    horizontal_menu.addItem("Menu 4", R.drawable.nar_icon);
    horizontal_menu.addItem("Menu 5", R.drawable.estacion1_icon);

    horizontal_menu.showItems();

    PagerAdapter pagerAdapter = new PagerAdapter(getSupportFragmentManager());
    viewPager.setAdapter(pagerAdapter);
    viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {

        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        }

        @Override
        public void onPageSelected(int position) {

            horizontal_menu.setItemSelected(position);
        }

        @Override
        public void onPageScrollStateChanged(int state) {
        }

    });


    horizontal_menu.setOnHSMenuClickListener(new HorizontalScrollMenuView.OnHSMenuClickListener() {
        @Override
        public void onHSMClick(MenuItem menuItem, int position) {

            viewPager.setCurrentItem(position);
        }
    });

}

private class PagerAdapter extends FragmentPagerAdapter {

    PagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {

        switch (position) {
            case 0:
                return new Menu_1();
            case 1:
                return new Menu_2();
            case 2:
                return new Menu_3();
            case 3:
                return new Menu_4();
            case 4:
                return new Menu_5();
            default:
                return new Menu_1();
        }
    }

    @Override
    public int getCount() {
        return 5;
    }

}