android - ViewPager2 with horizontal scrollView inside

Question

I implemented the new ViewPager for my project. The viewPager2 contains a list of fragment

 private class ViewPagerAdapter extends FragmentStateAdapter {

    private ArrayList<Integer> classifiedIds;

    ViewPagerAdapter(@NonNull Fragment fragment, final ArrayList<Integer> classifiedIds) {
        super(fragment);
        this.classifiedIds = classifiedIds;
    }

    @NonNull
    @Override
    public Fragment createFragment(int position) {
        return DetailsFragment.newInstance(classifiedIds.get(position));
    }

    @Override
    public int getItemCount() {
        return classifiedIds.size();
    }
}

Inside the fragment I got an horizontal recyclerView

LinearLayoutManager layoutManager = new LinearLayoutManager(getContext(), LinearLayoutManager.HORIZONTAL, false);
recyclerViewPicture.setLayoutManager(layoutManager);

The issue is when I try to scroll the recyclerview the viewPager take the touch and swap to the next fragment

When I was using the old ViewPager I didn't have this issue

Answer 1

I find a solution it's a know bug as you can see here https://issuetracker.google.com/issues/123006042 maybe they would solve it in the next updates

Thanks to TakeInfos and the exemple project inside the link

 recyclerViewPicture.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
        int lastX = 0;
        @Override
        public boolean onInterceptTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent e) {
            switch (e.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    lastX = (int) e.getX();
                    break;
                case MotionEvent.ACTION_MOVE:
                    boolean isScrollingRight = e.getX() < lastX;
                    if ((isScrollingRight && ((LinearLayoutManager) recyclerViewPicture.getLayoutManager()).findLastCompletelyVisibleItemPosition() == recyclerViewPicture.getAdapter().getItemCount() - 1) ||
                            (!isScrollingRight && ((LinearLayoutManager) recyclerViewPicture.getLayoutManager()).findFirstCompletelyVisibleItemPosition() == 0)) {
                       viewPager.setUserInputEnabled(true);
                    } else {
                        viewPager.setUserInputEnabled(false);
                    }
                    break;
                case MotionEvent.ACTION_UP:
                    lastX = 0;
                    viewPager.setUserInputEnabled(true);
                    break;
            }
            return false;
        }

        @Override
        public void onTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent e) {
        }

        @Override
        public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

        }
    });

I'm checking if the user scroll on the right or on the left. If the user reach the end or the start of the recyclerView I'm enable or disable the swipe on the view pager