android - 如何在获取数据后使用 ArrayAdapter 重置 ListView

Question

我正在使用 ListAdapter 来填充 ListView，如下所示:

static final String[] PROBLEMS = new String[] {"one", "two", "three" };

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);        

    setListAdapter(new ArrayAdapter<String>(this, R.layout.my_problems, PROBLEMS));

    ListView lv = getListView();
    lv.setTextFilterEnabled(true);

之后，我通过 AsyncTask 调用远程调用我的服务器以获取该列表的更多数据，当我从服务器取回数据时，我不知道如何填充和重置 ListView。到目前为止，我有这样的事情:

    @Override
    protected void onPostExecute(String result) 
    {       
            // Unwrap the stuff from the JSON string                
            String problem_title = null;
            String problem_id = null;

            try
            {
                JSONArray obj = new JSONArray(result);
                JSONObject o = obj.getJSONObject(0);                    

                Log.d( "Title: " , "" + o.getString("problem_title") );       
                Log.d( "id: " , "" + o.getString("problem_id") );      

                problem_title = o.getString("problem_title");
                problem_id = o.getString("problem_id");
            }
            catch ( Exception e )
            {
            }

            // Now not sure what to do :)
            // How do I reset the list that I had set up above?
                }

我可以将结果转化为适当的结构化数据以重置列表，但不确定如何完成。有人可以帮忙吗？ :)

Answer 1

我是这样用的

    values = new ArrayList<String>();
    //put anything you want in values as start
    adapter = new ArrayAdapter<String>(this,R.layout.notification, values);
    setListAdapter(adapter);

然后

    //change values array with your new data then update the adapter
    adapter.notifyDataSetChanged();

然后listview的内容会在你执行这个函数的时候发生变化