android – 我可以关闭列表单击上的警报对话框吗？

AlertDialog.Builder builder = new AlertDialog.Builder(this);

    final String[] Categories = sqliteHelper.getAllCategories();//this is where i get the array for my list
    ListView myList = new ListView(this);

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.layout.alert_dialog_list_view,Categories);
    myList.setAdapter(adapter);
    myList.setonItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent,View view,int position,long rowId) {
                     //doing something in here and then close
         }
    });
    builder.setTitle("Please Choose");
    builder.setInverseBackgroundForced(true);
    builder.setView(myList);
    final Dialog dialog = builder.create();
    dialog.show();
    }

警报对话框运行完美我只是不想在其中放任何按钮.