如何在android TabLayout的两个片段之间切换？

<android.support.design.widget.TabLayout
    android:id="@+id/tab_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/colorPrimary"
    app:tabTextColor="@android:color/white"
    app:tabSelectedTextColor="@android:color/white"
    app:tabIndicatorColor="@android:color/white"
    app:tabIndicatorHeight="2dp"/>

<android.support.v4.view.ViewPager
    android:id="@+id/view_pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

TabLayout tabLayout = findViewById(R.id.tab_layout);
ViewPager viewPager = findViewById(R.id.view_pager);

// 创建适配器
PagerAdapter adapter = new PagerAdapter(getSupportFragmentManager());

// 添加片段到适配器
adapter.addFragment(new Fragment1(), "片段1");
adapter.addFragment(new Fragment2(), "片段2");

// 设置适配器到ViewPager
viewPager.setAdapter(adapter);

// 将TabLayout与ViewPager关联
tabLayout.setupWithViewPager(viewPager);

public class Fragment1 extends Fragment {
    // 片段1的代码
}

public class Fragment2 extends Fragment {
    // 片段2的代码
}