java在屏幕旋转后恢复片段中的微调器位置
正如我在标题中所写,我希望在屏幕旋转后恢复微调器中的选定位置。尝试将位置保存在bundle中,并在中旋转后从savedInstanceState
获取位置
onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { }
或者
onViewCreated(View view, Bundle savedInstanceState)
或者
onActivityCreated(Bundle savedInstanceState)
但没人能做到:-/
附加反射反射
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, 安卓.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(安卓.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());
}
}
我还尝试了setSelection(position, false)
使用false
# 1 楼答案
如果所有这些都失败了,为什么不使用静态变量
当选择微调器项时
和内部
onViewCreated()
方法