android-findViewById在片段中返回null

我在片段中使用findViewByID方法遇到了问题.

Spinner中的微调器spinner =(Spinner)view.findViewById(R.id.tabsearchspinner_location);始终为null.请参见下面的代码.

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！

解决方法:

在没有ViewGroup的情况下为View充气,因为它只是在FragmentActivity内部：

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

在XML布局文件中添加ID的方式如下：

android:id="@+id/tabsearchspinner_location"

如您所见,您错过了

标签：android,android-fragments,android-spinner,findviewbyid
来源： https://codeday.me/bug/20191009/1882162.html