new AlertDialog.Builder(this)
            .setTitle("请选择")                
            .setSingleChoiceItems(cursor, 0, "text",
              new DialogInterface.OnClickListener() {
                                        
                 public void onClick(DialogInterface dialog, int which) {
                 //获取点击文本
                    dialog.dismiss();
                 }
              }
            )
            .setNegativeButton("取消", null)
            .show();
这样的对话框怎么获取点击项的文本啊