Tablayout-tabitem.md

This can be solve programmatically

Step 1 Create FragmentStateAdapter adapter class

public class TabAdapter extends FragmentStateAdapter {

    public TabAdapter(@NonNull FragmentActivity fragmentActivity) {
        super(fragmentActivity);
    }

    @NonNull
    @Override
    public Fragment createFragment(int position) {

        switch (position) {
            case 0:
                return new DayFragment();
            case 1:
                return new MyExerciseFragment();
            default:
                return new ExerciseFragment();
        }
    }

    @Override
    public int getItemCount() {
        return 3;
    }
}

Step 2 Create a method in your activity or fragment class to set tabs using TabLayoutMediator and call the method in onCreate method

void setupTabLayout() {
        ViewPager2 viewPager = binding.exerciseMenuViewPager;
        
        viewPager.setAdapter(tabAdapter);

        TabLayout tabLayout = binding.exerciseMenuTabLayout;

        new TabLayoutMediator(tabLayout, viewPager, (tab, position) -> {
            switch (position) {
                case 0:
                    tab.setText("Day");
                    break;
                case 1:
                    tab.setText("My Exercise");
                    break;
                default:
                    tab.setText("Exercise");
            }
        }).attach();
    }

This is how your activity class will look like

public class MainActivity extends AppCompatActivity {


    private ActivityMainBinding binding;
    private TabAdapter tabAdapter;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = ActivityMainBinding.inflate(getLayoutInflater());
        setContentView(binding.getRoot());

        tabAdapter = new TabAdapter(this);

        setupTabLayout();
    }

    void setupTabLayout() {}
}

NOTE: To use ViewBinding add this code to your app level build.gradle file.

android{
    
    ...
     buildFeatures {
        viewBinding true
    }
    ...
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <com.google.android.material.tabs.TabLayout
        android:id="@+id/exercise_menu_tabLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toTopOf="parent" />

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/exercise_menu_viewPager"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/exercise_menu_tabLayout" />

</androidx.constraintlayout.widget.ConstraintLayout>

Final results

I hope this helps

PS: You need to create these fragment classes DayFragment.java, MyExerciseFragment.javaand ExerciseFragment.