Question

我尝试按照此处的建议（How to refresh Android listview?）更新我的ListView，但无济于事。

相关代码如下。请注意，我在MainActivity中调用runOnUiThread来刷新此（片段）的ListView。

protected ArrayAdapter<String> adapter;
protected View view; 
protected ArrayList<String> theList; 
protected ListView listView;


public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
    view = inflater.inflate(R.layout.fragment_1, container, false);

    listView = (ListView) view.findViewById(R.id.listview);

    theList = new ArrayList<String>();
    adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1,  theList);
    listView.setAdapter(adapter);
    if(view != null) { return view;}

    ((ViewGroup) listView.getParent()).removeView(listView);
    container.addView(listView);

    return view;
}

protected void updateListViewWithPath(String resultFromServerRead) {
        //TODO: Somehow split the information..
    theList.add("yo");
    theList.add("hey");
    adapter.clear();
    adapter.addAll(theList);
    listView.invalidateViews();
    adapter.notifyDataSetChanged();
    listView.refreshDrawableState();
}

Answer 1

您已经拥有对arraylist列表的引用，因此您无需再次将其添加到listView只需将字符串添加到arraylist和notifyDataSetChanged;

示例：

    protected void updateListViewWithPath(String resultFromServerRead) {
        //TODO: Somehow split the information..
    theList.add("yo");
    theList.add("hey");
    adapter.notifyDataSetChanged();
}

调用notifyDataSetChanged后，ListView不更新，invalidateViews

1 个答案: