android - Android:微调器可在Activity中工作，但不能在Fragment中工作

所以我可以让一个Spinner在一个Activity中工作，但是当我将代码转移到一个片段时，它显然不起作用。
我发现这两行有个错误：

ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.category_array, android.R.layout.simple_spinner_item);
ArrayAdapter<String> adapterItem = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, suggestedItems);

我知道上下文需要改变。我已经试过使用this，但效果不太好。
需要一些洞察力！谢谢您！

public class NominateFragment extends Fragment {

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.fragment_nominate_page, container, false);

    //SPINNER
    Spinner spinner = (Spinner)getView().findViewById(R.id.category);
    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.category_array, android.R.layout.simple_spinner_item); // Create an ArrayAdapter using the string array and a default spinner layout
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // Specify the layout to use when the list of choices appears
    spinner.setAdapter(adapter);    // Apply the adapter to the spinner

    //AUTOCOMPLETE
    AutoCompleteTextView nominateItem = (AutoCompleteTextView)getView().findViewById(R.id.autocomplete_nominate_item); // Get a reference to the AutoCompleteTextView in the layout
    String[] suggestedItems = getResources().getStringArray(R.array.suggested_items_array); // Get the string array
    ArrayAdapter<String> adapterItem = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, suggestedItems);     // Create the adapter and set it to the AutoCompleteTextView
    nominateItem.setAdapter(adapterItem);

    return view;
}

}

最佳答案

回复这一行：

ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.category_array, android.R.layout.simple_spinner_item);

具有

ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(getActivity(), R.array.category_array, android.R.layout.simple_spinner_item);

这一行：

Spinner spinner = (Spinner)getView().findViewById(R.id.category);

用：

Spinner spinner = (Spinner)view.findViewById(R.id.category);

还有：

AutoCompleteTextView nominateItem = (AutoCompleteTextView)getView().findViewById(R.id.autocomplete_nominate_item); // Get a reference to the AutoCompleteTextView in the layout

用：

AutoCompleteTextView nominateItem = (AutoCompleteTextView)view.findViewById(R.id.autocomplete_nominate_item); // Get a reference to the AutoCompleteTextView in the layout