您可以使用范围为activity生命周期的共享ViewModel，并使用它在片段之间共享数据。

来自文档的代码:

class SharedViewModel : ViewModel() {
    val selected = MutableLiveData<Item>()

    fun select(item: Item) {
        selected.value = item
    }
}

class MasterFragment : Fragment() {

    private lateinit var itemSelector: Selector

    // Use the 'by activityViewModels()' Kotlin property delegate
    // from the fragment-ktx artifact
    private val model: SharedViewModel by activityViewModels()

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        itemSelector.setOnClickListener { item ->
            // Update the UI
        }
    }
}

class DetailFragment : Fragment() {

    // Use the 'by activityViewModels()' Kotlin property delegate
    // from the fragment-ktx artifact
    private val model: SharedViewModel by activityViewModels()

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        model.selected.observe(viewLifecycleOwner, Observer<Item> { item ->
            // Update the UI
        })
    }
}

更多信息请参见:https://developer.android.com/topic/libraries/architecture/ViewModel#Sharing

简单地说，您可以使用bundle将数据从一个片段传递到另一个片段，就像这样

 FragmentManager fragmentManager = getFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        Fragment2 fragment2 = new Fragment2();
        Bundle bundle = new Bundle();
        msubcategories.setArguments(bundle);
        bundle.putString("data", data);
        fragmentTransaction.replace(R.id.fragment_container, fragment2);
        fragmentTransaction.addToBackStack(null);
        fragmentTransaction.commit();

在Fragment2中，您可以获得数据

Bundle bundle = getArguments();
        assert bundle != null;
      String  category = bundle.getString("data");