我有一个应用程序,其中有几个选项卡;与任何一个进行交互都会调用要显示的片段。不幸的是,当我切换到下面的片段时,我的listView没有出现,尽管有问题的列表被填充。非常感谢您提供的任何帮助。
片段的相关代码:
public class Fragment_1 extends SherlockFragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
//If time permits, I will try to make a Custom Adapter implemented with a TreeSet
TreeSet<BlacklistWord> theSet = MainActivity.getInstance().datasource.GetAllWords();
ArrayList<String> list = new ArrayList<String>();
for(BlacklistWord i :theSet){
System.out.println(i.getWord());
list.add(i.getWord());
}
Collections.sort(list);
//Making BlackList
listView = new ListView(getActivity());
listView.findViewById(R.id.listview);
adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, list);
listView.setAdapter(adapter);
((BaseAdapter) listView.getAdapter()).notifyDataSetChanged();
container.addView(listView);
return inflater.inflate(R.layout.blacklist, container, false);
// return inflater.inflate(R.layout.blacklist, container, false);
}
}
XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/listview"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
答案 0 :(得分:2)
使用这种方式:
public class LListFragment extends ListFragment {
private String[] line;
public static final String[] TITLES = { "Henry IV (1)", "Henry V",
"Henry VIII", "Richard II", "Richard III", "Merchant of Venice",
"Othello", "King Lear" };
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
ListView listv = getListView();
setListAdapter(new ArrayAdapter<String>(getActivity(),
R.layout.scan_row, R.id.textView1, TITLES));
}
}
或者你在xml中有listview然后..
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.llist_layout, container, false);
// do your view initialization here
listv = (ListView) view.findViewById(R.id.lineDlist);
name = (TextView) view.findViewById(R.id.lineName);
st = (TextView) view.findViewById(R.id.lineSt);
listv.setAdapter(new ImageAdapter(getActivity(),
GeneralClass.lineDetails));
return view;
}
答案 1 :(得分:2)
将代码更改为(盲编码):
public class Fragment_1 extends SherlockFragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
/**
** Change the way you get the data. Don't keep references to activities like that.
**/
TreeSet<BlacklistWord> theSet = MainActivity.getInstance().datasource.GetAllWords();
ArrayList<String> list = new ArrayList<String>();
for(BlacklistWord i :theSet){
System.out.println(i.getWord());
list.add(i.getWord());
}
Collections.sort(list);
View v = inflater.inflate(R.layout.blacklist, container, false);
listView = view.findViewById(R.id.listview);
adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, list);
listView.setAdapter(adapter);
return view;
}
}
您的列表视图未显示,因为您正在使用构造函数错误地创建ListView,然后您正在调用findViewById(它没有任何用处),然后设置适配器,调用通知数据集已更改,最后是您'重新回到另一个名单。
答案 2 :(得分:1)
因为您正在创建一个新的ListView,并试图在其中找到您的xml listview ...
而是使用某些东西;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View view = inflater.inflate(R.layout.blacklist, container, false);
ListView listview = (ListView) view.findViewById(R.id.listview);
//Making BlackList
adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, list);
listView.setAdapter(adapter);
((BaseAdapter) listView.getAdapter()).notifyDataSetChanged();
container.addView(listView);
return view;
}