Question

我有一个ListView显示不同配置文件的名称，当用户按住项目时，活动显示alertDialog，如果用户按下确认按钮我要从listView中删除元素，从我的ArrayAdapter和来自我的ArrayList。我知道onItemLongClick方法中的arg2表示所选项的索引，但我希望能够在正按钮的onClick方法中访问它。有什么建议？我的ArrayList被称为“ListaUtentiStringa”，ArrayAdapter是“profilesAdapter”，listView被称为listview。对不起，我的英语不好。

listview.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {

public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {


        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setCancelable(true);
        builder.setTitle("Vuoi davvero cancellare il profilo?");
        builder.setPositiveButton("Si", new DialogInterface.OnClickListener() {

                            public void onClick(DialogInterface dialog, int which) {
                                          // How to remove the selected item?
                            }

                        });

builder.setNegativeButton("Annulla", new DialogInterface.OnClickListener() {

        public void onClick(DialogInterface dialog, int which) {

        }

        });

        AlertDialog alert = builder.create();
        alert.show();
        profilesAdapter.notifyDataSetChanged();


    return true;
    }
    });

Answer 1

这样做：

   listview.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {


@Override
public boolean onItemLongClick(AdapterView<?> parent, View view,
              final int position, long id) {
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setCancelable(true);
        builder.setTitle("Vuoi davvero cancellare il profilo?");
        builder.setPositiveButton("Si", new DialogInterface.OnClickListener() {

        public void onClick(DialogInterface dialog, int which) {
         // How to remove the selected item?
          adapter.remove(adapter.getItem(position));
        }

    });

Answer 2

试试这个..

使用ListaUtentiStringa ArrayList和profilesAdapter adapter作为全局变量。

 builder.setPositiveButton("Si", new DialogInterface.OnClickListener() {

                        public void onClick(DialogInterface dialog, int which) {
                                      // How to remove the selected item?

                                ListaUtentiStringa.remove(arg2);
                                profilesAdapter.notifyDataSetChanged();
                                dialog.dismiss();
                        }

                    });

修改

public boolean onItemLongClick(AdapterView<?> arg0, View arg1, final int arg2, long arg3) {

如何使用alertDialog从listView中删除项目

2 个答案: