里面有水平scrollView的ViewPager2 [英] ViewPager2 with horizontal scrollView inside

问题描述

我为我的项目实现了新的ViewPager. viewPager2包含片段列表

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();
    }
}

在碎片中，我得到了一个水平的recyclerView

Inside the fragment I got an horizontal recyclerView

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

问题是当我尝试滚动recyclerview时，viewPager进行触摸并交换到下一个片段

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

当我使用旧的ViewPager时，我没有这个问题

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

推荐答案

我找到了一个解决方案，它是一个已知的错误，您可以在这里看到 https://issuetracker.google.com/issues/123006042 也许他们会在下一次更新中解决

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

感谢TakeInfos和链接中的示例项目

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) {

        }
    });

我正在检查用户是向右滚动还是向左滚动.如果用户到达recyclerView的末尾或起点，则可以启用或禁用在视图寻呼机上滑动

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

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