ViewPagerSlider.java

    private void setupViewPagerCards() {
        List<RealmMobileBankCards> cards = new ArrayList<>(RealmMobileBankCards.getCards());
        if (cards.size() == 0) return;
        binding.vpCards.setAdapter(new BankCardsAdapter(cards));
        binding.vpCards.setOffscreenPageLimit(cards.size() - 1);
        initViewPager(cards.size());
        setupRecyclerItems();
    }

    private void initViewPager(int size) {

        binding.vpCards.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                setEnableIndicator(position);
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });

        createViewPagerIndicators(size);
    }

    private void createViewPagerIndicators(int size) {
        for (int i = 0; i < size; i++) {
            ImageView iv = new ImageView(binding.lytIndicators.getContext());
            LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(24, 24);
            lp.setMargins(8, 8, 8, 8);
            iv.setLayoutParams(lp);
            iv.setBackgroundResource(R.drawable.indicator_slider);
            if (i == 0) iv.setSelected(true);
            binding.lytIndicators.addView(iv);
        }
    }

    private void setEnableIndicator(int position) {
        int count = binding.lytIndicators.getChildCount();
        if (position > count) return;
        for (int i = 0; i < count; i++) {
            binding.lytIndicators.getChildAt(i).setSelected(i == position);
        }
    }