当我在标题中写下标题时,我希望在屏幕旋转后恢复微调器中选定的位置。尝试通过保存捆绑包中的位置来完成此操作,并从 savedInstanceState 旋入后

onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { }

或

onViewCreated(View view, Bundle savedInstanceState)

或

onActivityCreated(Bundle savedInstanceState) 

但没有人工作:-/

添加配方片段

public class AddRecipeFragment extends Fragment implements ObservableScrollViewCallbacks {


    private static final String SELECTED_CATEGORY = "SELECTED_CATEGORY";
    private Spinner categoriesSpinner;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_add_recipe, container, false);
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        categoriesSpinner = (Spinner) view.findViewById(R.id.categories_spinner);
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(getActivity(), R.array.categories, android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        categoriesSpinner.setAdapter(adapter);

        if (savedInstanceState != null) {
            categoriesSpinner.setSelection(savedInstanceState.getInt(SELECTED_CATEGORY, 0), true);
        }
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putInt(SELECTED_CATEGORY, categoriesSpinner.getSelectedItemPosition());
    }
}

我也尝试过 setSelection(position, false) 具有 假的 .