方法 oncreateview 中片段中 listview.setadapter() 的空指针异常

Posted 2023-02-22

【中文标题】方法 oncreateview 中片段中 listview.setadapter() 的空指针异常

【英文标题】：null pointer exception with listview.setadapter() in fragment in method oncreateview

【发布时间】：2016-06-24 10:47:00

【问题描述】：

public View onCreateView(LayoutInflater inflater, ViewGroup 容器, 捆绑保存的InstanceState） 查看 v = inflater.inflate(R.layout.fragment_main, container, false);

    String[] data = 
            "Mon 6/23 - Sunny - 31/17",
            "Tue 6/24 - Foggy - 21/8",
            "Wed 6/25 - Cloudy - 22/17",
            "Thurs 6/26 - Rainy - 18/11",
            "Fri 6/27 - Foggy - 21/10",
            "Sat 6/28 - TRAPPED IN WEATHERSTATION - 23/18",
            "Sun 6/29 - Sunny - 20/7"
    ;
    ArrayList<String> listforecast = new ArrayList<String>(Arrays.asList(data));


    ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), R.layout.list_item_forcast_,
            R.id.listitem_forcast_textview, listforecast);

    listView = (ListView) container.findViewById(R.id.listview_display);
    listView.setAdapter(adapter);

    return v;
 

片段.xml

<!-- TODO: Update blank fragment layout -->
<ListView
    android:layout_
    android:layout_
    android:id="@+id/listview_display"
    ></ListView>

【参考方案1】：

替换：

listView = (ListView) container.findViewById(R.id.listview_display);

与

listView = (ListView) v.findViewById(R.id.listview_display);