1

我在片段中使用 findViewByID 方法时遇到问题。

微调器Spinner spinner = (Spinner) view.findViewById(R.id.tabsearchspinner_location);始终为空。请看下面的代码。

public class FragmentTabSearch extends SherlockFragment implements OnItemSelectedListener {

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    View view = inflater.inflate(R.layout.fragment_tab_suggestions, container, false);

    Spinner spinner = (Spinner) view.findViewById(R.id.tabsearchspinner_location);
    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this.getSherlockActivity(), R.array.spinner_location, android.R.layout.simple_spinner_item);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner.setAdapter(adapter);

    return view;
}

@Override
public void onItemSelected(IcsAdapterView<?> parent, View view,
        int position, long id) {
    // TODO Auto-generated method stub

}

@Override
public void onNothingSelected(IcsAdapterView<?> parent) {
    // TODO Auto-generated method stub

}

}

布局文件如下（ps：我已经在values/ids.xml文件中声明了id/tabsearchspinner_location）：<item type="id" name="tabsearchspinner_location"></item>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<Spinner
    android:id="@id/tabsearchspinner_location"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

<ListView
    android:id="@id/tablistview_search"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >
</ListView>

任何帮助表示赞赏！

4

2 回答 2

2

View在没有 的情况下为您充气ViewGroup，因为它只是在您的 FragmentActivity 中：

View view = inflater.inflate(R.layout.fragment_tab_suggestions, null);

在 XML 布局文件中添加 ID 的方式是这样的：

android:id="@+id/tabsearchspinner_location"

如您所见，您缺少+

于 2013-05-04T14:58:24.023 回答
0

Sorry, I just found out that I inflated the wrong layout, so the findViewById method always returns null, thanks for all the help though.

于 2013-05-06T01:36:11.670 回答