问题描述

我创建了一个带有底部导航栏的活动.当我想切换到另一个片段时，我想要 tablayout.而tablayout可以控制viewpager.我可以把viewpager放到指定的fragment吗?

I created an activity with a bottom navigation bar. I want tablayout when I want to switch to another fragment. And tablayout can control viewpager. Can I put viewpager to the specified fragment?

我想要这样:

这是当前结果.我想把 viewpager 放在红框里.

This is the current result. I want to put viewpager in the red box.

推荐答案

试试这个来同步你的 BottomNavigationView 和 TabLayout 与 ViewPager

Try this to sync your BottomNavigationView and TabLayout with ViewPager

    myBottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {

            int id = item.getItemId();

            if (id == R.id.action_one) {
                myViewPager.setCurrentItem(0);
            }else if (id == R.id.action_two) {
                myViewPager.setCurrentItem(1);
            }else if (id == R.id.action_three) {
                myViewPager.setCurrentItem(2);
            }else if (id == R.id.action_four) {
                myViewPager.setCurrentItem(3);
            }
            return false;
        }
    });


    myViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            if (position == 0) {
                myBottomNavigationView.setSelectedItemId(R.id.action_one);
            }else if (position == 1) {
                myBottomNavigationView.setSelectedItemId(R.id.action_two);
            }else if (position == 2) {
                myBottomNavigationView.setSelectedItemId(R.id.action_three);
            }else if (position == 3) {
                myBottomNavigationView.setSelectedItemId(R.id.action_four);
            }
        }

        @Override
        public void onPageSelected(int position) {

        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }
    });

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