TabLayout侧滑

public class MainActivity extends AppCompatActivity {
    private ViewPager pager;
    private TabLayout mytab;
    private List<String> meuns=new ArrayList<>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mytab = findViewById(R.id.mytab);
        pager=findViewById(R.id.vp);
        initmeuns();
        MyAdapter adapter = new MyAdapter(getSupportFragmentManager());
        pager.setAdapter(adapter);
        //一次初使化所有页面
        pager.setOffscreenPageLimit(meuns.size());
        //创建关联
        mytab.setupWithViewPager(pager);

    }
    class MyAdapter extends FragmentPagerAdapter{
        public MyAdapter(FragmentManager fm) {
            super(fm);
        }
        @Override
        public CharSequence getPageTitle(int position) {
            return meuns.get(position);
        }
        @Override
        public Fragment getItem(int position) {
          Bundle bundle=new Bundle();
          bundle.putString("key",meuns.get(position));
            Fragment1 fragment1=new Fragment1();
            fragment1.setArguments(bundle);
            return fragment1;
        }
        @Override
        public int getCount() {
            return meuns.size();
        }
    }
    private void initmeuns() {
        meuns.add("新闻");
        meuns.add("社会");
        meuns.add("军事");
        meuns.add("科技");
        meuns.add("财经");
        meuns.add("娱乐");
        meuns.add("八卦");
        meuns.add("二炮");
        meuns.add("体育");
        meuns.add("明星");
        meuns.add("美女");
        meuns.add("绯闻");
    }
}