Android上部にtabLayoutとviewPagerで2級分類を表示

activity1:

DingdanPagerAdapter adapter = new DingdanPagerAdapter(getSupportFragmentManager(),
        new String[]{"  ","  "});
viewPager.setAdapter(adapter);
tabLayout.setupWithViewPager(viewPager);

fragment1:

DingdanAdapter adapter = new DingdanAdapter(getChildFragmentManager(),
        new String[]{"    ","   ","  ","  "});
adapter.setFlagType(flag,type);
viewPager.setAdapter(adapter);
tabLayout.setupWithViewPager(viewPager);

注意activityネストfragment、使用する管理者

getSupportFragmentManager()

fragmentネストfragment、使用する管理者

getChildFragmentManager()