要将新项动态添加到列表中，您必须从ListActivity获取适配器类，并且只需添加新元素即可。将项目直接添加到适配器时，会自动为您调用notifyDataSetChanged-
并且视图会自动更新。
您还可以提供自己的适配器（扩展ArrayAdapter），并使用List参数覆盖构造函数。您可以像使用适配器一样使用此列表，但是在这种情况下，您必须自己调用adapter.notifyDataSetChanged（）-刷新视图。
请看下面的例子：
public class CustomList extends ListActivity {private LayoutInflater mInflater;private Vector<RowData> data;@Overridepublic void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mInflater = (LayoutInflater) getSystemService(Activity.LAYOUT_INFLATER_SERVICE); data = new Vector<RowData>(); RowData rd = new RowData("item1", "description1"); data.add(rd); rd = new RowData("item2", "description2"); data.add(rd); rd = new RowData("item2", "description3"); data.add(rd); CustomAdapter adapter = new CustomAdapter(this, R.layout.custom_row,R.id.item, data); setListAdapter(adapter); getListView().setTextFilterEnabled(true);}public void onListItemClick(ListView parent, View v, int position, long id) { CustomAdapter adapter = (CustomAdapter) parent.getAdapter(); RowData row = adapter.getItem(position); alertDialog.Builder builder = new alertDialog.Builder(this); builder.setTitle(row.mItem); builder.setMessage(row.mDescription + " -> " + position ); builder.setPositiveButton("ok", null); builder.show();}private class RowData { protected String mItem; protected String mDescription; RowData(String item, String description){ mItem = item; mDescription = description; } @Override public String toString() { return mItem + " " + mDescription; }}private class CustomAdapter extends ArrayAdapter<RowData> { public CustomAdapter(Context context, int resource, int textViewResourceId, List<RowData> objects) { super(context, resource, textViewResourceId, objects); } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; //widgets displayed by each item in your list TextView item = null; TextView description = null; //data from your adapter RowData rowData= getItem(position); //we want to reuse already constructed row views... if(null == convertView){ convertView = mInflater.inflate(R.layout.custom_row, null); holder = new ViewHolder(convertView); convertView.setTag(holder); } // holder = (ViewHolder) convertView.getTag(); item = holder.getItem(); item.setText(rowData.mItem); description = holder.getDescription(); description.setText(rowData.mDescription); return convertView; }}private class ViewHolder { private View mRow; private TextView description = null; private TextView item = null; public ViewHolder(View row) { mRow = row; } public TextView getDescription() { if(null == description){ description = (TextView) mRow.findViewById(R.id.description); } return description; } public TextView getItem() { if(null == item){ item = (TextView) mRow.findViewById(R.id.item); } return item; } }}
您可以扩展上面的示例并添加“更多”按钮-只需将新项目添加到适配器（或矢量）即可。
问候！
