Android TabLayout+ViewPager2简单实现

public class MainActivity extends AppCompatActivity {
    private String[] titles = {"单选", "多选"};
    private List fragmentList = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //造数据
        fragmentList.add(new OneFragment());
        fragmentList.add(new TwoFragment());
        TabLayout tabs = findViewById(R.id.tabs);
        ViewPager2 viewPager = findViewById(R.id.view_pager);
        viewPager.setAdapter(new FragmentStateAdapter(this) {
            @NonNull
            @Override
            public Fragment createFragment(int position) {
                return fragmentList.get(position);
            }

            @Override
            public int getItemCount() {
                return fragmentList.size();
            }
        });
        viewPager.setOffscreenPageLimit(2);
        TabLayoutMediator tabLayoutMediator = new TabLayoutMediator(tabs, viewPager, new TabLayoutMediator.TabConfigurationStrategy() {
            @Override
            public void onConfigureTab(@NonNull TabLayout.Tab tab, int position) {
                tab.setText(titles[position]);
            }
        });
        //这句话很重要
        tabLayoutMediator.attach();

    }
}

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布局文件

效果演示：

yhx.gif