当我移动到另一个活动并返回时，片段editText数据被清除

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putString("editTextData", editText.getText().toString());
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_layout, container, false);
    editText = view.findViewById(R.id.editText);

    if (savedInstanceState != null) {
        String editTextData = savedInstanceState.getString("editTextData");
        editText.setText(editTextData);
    }

    return view;
}

public class MyViewModel extends ViewModel {
    private MutableLiveData<String> editTextData = new MutableLiveData<>();

    public void setEditTextData(String data) {
        editTextData.setValue(data);
    }

    public LiveData<String> getEditTextData() {
        return editTextData;
    }
}

public class MyFragment extends Fragment {
    private EditText editText;
    private MyViewModel viewModel;

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        viewModel = new ViewModelProvider(requireActivity()).get(MyViewModel.class);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_layout, container, false);
        editText = view.findViewById(R.id.editText);

        viewModel.getEditTextData().observe(getViewLifecycleOwner(), new Observer<String>() {
            @Override
            public void onChanged(String data) {
                editText.setText(data);
            }
        });

        return view;
    }

    @Override
    public void onPause() {
        super.onPause();
        viewModel.setEditTextData(editText.getText().toString());
    }
}