我有一个目录中的文件夹列表,onListItemClick事件调用show alert对话框,然后单击是按钮我处理删除文件。我想在成功删除文件后,还要从列表中删除所选项目或使用新值刷新视图。
我怎样才能做到最简单?
包裹活动代码:
public class PackageListActivity extends ListActivity
{
// create instance of App helper class
AppHelper helper = new AppHelper();
String folderNameToDelete;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// get arrayListOf folders
ArrayList<String> folderArrayList = helper.getListOfFileInDirectory(null);
// convert array listo to simple array
String[] arr = folderArrayList.toArray(new String[folderArrayList.size()]);
// set to aray adapter
setListAdapter(new PackageArrayAdapter(this, arr));
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
//get selected items
String selectedValue = (String) getListAdapter().getItem(position);
//Toast.makeText(this, selectedValue, Toast.LENGTH_SHORT).show();
this.showAlerDialog(selectedValue);
}
答案 0 :(得分:0)
通过给出要删除的位置来删除arraylist项,然后使用适配器调用notifyDataSetChanged()方法
folderArrayList.remove(<index of element to remove>);
PackageArrayAdapter.notifyDataSetChanged();